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7
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1 /* vi:set ts=8 sts=4 sw=4:
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2 *
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3 * VIM - Vi IMproved by Bram Moolenaar
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4 *
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5 * Do ":help uganda" in Vim to read copying and usage conditions.
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6 * Do ":help credits" in Vim to see a list of people who contributed.
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7 * See README.txt for an overview of the Vim source code.
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8 */
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9 /*
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10 * move.c: Functions for moving the cursor and scrolling text.
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11 *
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12 * There are two ways to move the cursor:
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13 * 1. Move the cursor directly, the text is scrolled to keep the cursor in the
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14 * window.
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15 * 2. Scroll the text, the cursor is moved into the text visible in the
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16 * window.
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17 * The 'scrolloff' option makes this a bit complicated.
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18 */
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19
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20 #include "vim.h"
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21
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22 static void comp_botline __ARGS((win_T *wp));
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532
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23 static int scrolljump_value __ARGS((void));
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7
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24 static int check_top_offset __ARGS((void));
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25 static void curs_rows __ARGS((win_T *wp, int do_botline));
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26 static void validate_botline_win __ARGS((win_T *wp));
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27 static void validate_cheight __ARGS((void));
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28
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29 typedef struct
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30 {
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31 linenr_T lnum; /* line number */
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32 #ifdef FEAT_DIFF
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33 int fill; /* filler lines */
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34 #endif
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35 int height; /* height of added line */
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36 } lineoff_T;
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37
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38 static void topline_back __ARGS((lineoff_T *lp));
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39 static void botline_forw __ARGS((lineoff_T *lp));
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40 #ifdef FEAT_DIFF
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41 static void botline_topline __ARGS((lineoff_T *lp));
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42 static void topline_botline __ARGS((lineoff_T *lp));
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43 static void max_topfill __ARGS((void));
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44 #endif
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45
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46 /*
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47 * Compute wp->w_botline for the current wp->w_topline. Can be called after
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48 * wp->w_topline changed.
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49 */
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50 static void
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51 comp_botline(wp)
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52 win_T *wp;
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53 {
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54 int n;
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55 linenr_T lnum;
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56 int done;
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57 #ifdef FEAT_FOLDING
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58 linenr_T last;
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59 int folded;
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60 #endif
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61
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62 /*
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63 * If w_cline_row is valid, start there.
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64 * Otherwise have to start at w_topline.
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65 */
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66 check_cursor_moved(wp);
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67 if (wp->w_valid & VALID_CROW)
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68 {
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69 lnum = wp->w_cursor.lnum;
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70 done = wp->w_cline_row;
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71 }
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72 else
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73 {
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74 lnum = wp->w_topline;
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75 done = 0;
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76 }
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77
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78 for ( ; lnum <= wp->w_buffer->b_ml.ml_line_count; ++lnum)
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79 {
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80 #ifdef FEAT_FOLDING
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81 last = lnum;
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82 folded = FALSE;
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83 if (hasFoldingWin(wp, lnum, NULL, &last, TRUE, NULL))
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84 {
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85 n = 1;
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86 folded = TRUE;
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87 }
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88 else
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89 #endif
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90 #ifdef FEAT_DIFF
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91 if (lnum == wp->w_topline)
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92 n = plines_win_nofill(wp, lnum, TRUE) + wp->w_topfill;
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93 else
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94 #endif
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95 n = plines_win(wp, lnum, TRUE);
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96 if (
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97 #ifdef FEAT_FOLDING
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98 lnum <= wp->w_cursor.lnum && last >= wp->w_cursor.lnum
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99 #else
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100 lnum == wp->w_cursor.lnum
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101 #endif
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102 )
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103 {
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104 wp->w_cline_row = done;
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105 wp->w_cline_height = n;
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106 #ifdef FEAT_FOLDING
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107 wp->w_cline_folded = folded;
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108 #endif
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109 wp->w_valid |= (VALID_CROW|VALID_CHEIGHT);
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110 }
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111 if (done + n > wp->w_height)
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112 break;
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113 done += n;
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114 #ifdef FEAT_FOLDING
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115 lnum = last;
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116 #endif
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117 }
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118
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119 /* wp->w_botline is the line that is just below the window */
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120 wp->w_botline = lnum;
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121 wp->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP;
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122
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123 set_empty_rows(wp, done);
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124 }
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125
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126 /*
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127 * Update curwin->w_topline and redraw if necessary.
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128 * Used to update the screen before printing a message.
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129 */
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130 void
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131 update_topline_redraw()
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132 {
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133 update_topline();
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134 if (must_redraw)
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135 update_screen(0);
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136 }
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137
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138 /*
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139 * Update curwin->w_topline to move the cursor onto the screen.
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140 */
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141 void
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142 update_topline()
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143 {
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144 long line_count;
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145 int halfheight;
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146 int n;
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147 linenr_T old_topline;
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148 #ifdef FEAT_DIFF
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149 int old_topfill;
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150 #endif
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151 #ifdef FEAT_FOLDING
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152 linenr_T lnum;
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153 #endif
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154 int check_topline = FALSE;
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155 int check_botline = FALSE;
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156 #ifdef FEAT_MOUSE
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157 int save_so = p_so;
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158 #endif
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159
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160 if (!screen_valid(TRUE))
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161 return;
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162
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163 check_cursor_moved(curwin);
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164 if (curwin->w_valid & VALID_TOPLINE)
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165 return;
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166
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167 #ifdef FEAT_MOUSE
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168 /* When dragging with the mouse, don't scroll that quickly */
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169 if (mouse_dragging)
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170 p_so = mouse_dragging - 1;
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171 #endif
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172
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173 old_topline = curwin->w_topline;
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174 #ifdef FEAT_DIFF
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175 old_topfill = curwin->w_topfill;
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176 #endif
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177
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178 /*
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179 * If the buffer is empty, always set topline to 1.
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180 */
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181 if (bufempty()) /* special case - file is empty */
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182 {
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183 if (curwin->w_topline != 1)
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184 redraw_later(NOT_VALID);
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185 curwin->w_topline = 1;
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186 #ifdef FEAT_DIFF
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187 curwin->w_topfill = 0;
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188 #endif
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189 curwin->w_botline = 2;
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190 curwin->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP;
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191 #ifdef FEAT_SCROLLBIND
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192 curwin->w_scbind_pos = 1;
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193 #endif
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194 }
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195
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196 /*
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197 * If the cursor is above or near the top of the window, scroll the window
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198 * to show the line the cursor is in, with 'scrolloff' context.
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199 */
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200 else
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201 {
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202 if (curwin->w_topline > 1)
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203 {
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204 /* If the cursor is above topline, scrolling is always needed.
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205 * If the cursor is far below topline and there is no folding,
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206 * scrolling down is never needed. */
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207 if (curwin->w_cursor.lnum < curwin->w_topline)
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208 check_topline = TRUE;
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209 else if (check_top_offset())
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210 check_topline = TRUE;
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211 }
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212 #ifdef FEAT_DIFF
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213 /* Check if there are more filler lines than allowed. */
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214 if (!check_topline && curwin->w_topfill > diff_check_fill(curwin,
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215 curwin->w_topline))
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216 check_topline = TRUE;
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217 #endif
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218
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219 if (check_topline)
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220 {
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221 halfheight = curwin->w_height / 2 - 1;
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222 if (halfheight < 2)
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223 halfheight = 2;
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224
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225 #ifdef FEAT_FOLDING
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226 if (hasAnyFolding(curwin))
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227 {
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228 /* Count the number of logical lines between the cursor and
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229 * topline + p_so (approximation of how much will be
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230 * scrolled). */
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231 n = 0;
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232 for (lnum = curwin->w_cursor.lnum;
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233 lnum < curwin->w_topline + p_so; ++lnum)
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234 {
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235 ++n;
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236 /* stop at end of file or when we know we are far off */
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237 if (lnum >= curbuf->b_ml.ml_line_count || n >= halfheight)
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238 break;
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239 (void)hasFolding(lnum, NULL, &lnum);
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240 }
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241 }
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242 else
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243 #endif
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244 n = curwin->w_topline + p_so - curwin->w_cursor.lnum;
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245
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246 /* If we weren't very close to begin with, we scroll to put the
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247 * cursor in the middle of the window. Otherwise put the cursor
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248 * near the top of the window. */
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249 if (n >= halfheight)
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250 scroll_cursor_halfway(FALSE);
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251 else
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252 {
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532
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253 scroll_cursor_top(scrolljump_value(), FALSE);
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7
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254 check_botline = TRUE;
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255 }
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256 }
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257
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258 else
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259 {
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260 #ifdef FEAT_FOLDING
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261 /* Make sure topline is the first line of a fold. */
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262 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
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263 #endif
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264 check_botline = TRUE;
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265 }
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266 }
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267
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268 /*
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269 * If the cursor is below the bottom of the window, scroll the window
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270 * to put the cursor on the window.
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271 * When w_botline is invalid, recompute it first, to avoid a redraw later.
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272 * If w_botline was approximated, we might need a redraw later in a few
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273 * cases, but we don't want to spend (a lot of) time recomputing w_botline
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274 * for every small change.
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275 */
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276 if (check_botline)
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277 {
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278 if (!(curwin->w_valid & VALID_BOTLINE_AP))
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279 validate_botline();
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280
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281 if (curwin->w_botline <= curbuf->b_ml.ml_line_count)
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282 {
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283 if (curwin->w_cursor.lnum < curwin->w_botline
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284 && ((long)curwin->w_cursor.lnum
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285 >= (long)curwin->w_botline - p_so
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286 #ifdef FEAT_FOLDING
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287 || hasAnyFolding(curwin)
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288 #endif
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289 ))
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290 {
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291 lineoff_T loff;
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292
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293 /* Cursor is above botline, check if there are 'scrolloff'
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294 * window lines below the cursor. If not, need to scroll. */
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295 n = curwin->w_empty_rows;
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296 loff.lnum = curwin->w_cursor.lnum;
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297 #ifdef FEAT_FOLDING
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298 /* In a fold go to its last line. */
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299 (void)hasFolding(loff.lnum, NULL, &loff.lnum);
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300 #endif
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301 #ifdef FEAT_DIFF
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302 loff.fill = 0;
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303 n += curwin->w_filler_rows;
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304 #endif
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305 loff.height = 0;
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306 while (loff.lnum < curwin->w_botline
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307 #ifdef FEAT_DIFF
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308 && (loff.lnum + 1 < curwin->w_botline || loff.fill == 0)
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309 #endif
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310 )
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311 {
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312 n += loff.height;
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313 if (n >= p_so)
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314 break;
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315 botline_forw(&loff);
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316 }
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317 if (n >= p_so)
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318 /* sufficient context, no need to scroll */
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319 check_botline = FALSE;
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320 }
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321 if (check_botline)
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322 {
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323 #ifdef FEAT_FOLDING
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324 if (hasAnyFolding(curwin))
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325 {
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326 /* Count the number of logical lines between the cursor and
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327 * botline - p_so (approximation of how much will be
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328 * scrolled). */
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329 line_count = 0;
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330 for (lnum = curwin->w_cursor.lnum;
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331 lnum >= curwin->w_botline - p_so; --lnum)
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332 {
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333 ++line_count;
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334 /* stop at end of file or when we know we are far off */
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335 if (lnum <= 0 || line_count > curwin->w_height + 1)
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336 break;
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337 (void)hasFolding(lnum, &lnum, NULL);
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338 }
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339 }
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340 else
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341 #endif
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342 line_count = curwin->w_cursor.lnum - curwin->w_botline
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343 + 1 + p_so;
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344 if (line_count <= curwin->w_height + 1)
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532
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345 scroll_cursor_bot(scrolljump_value(), FALSE);
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7
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346 else
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347 scroll_cursor_halfway(FALSE);
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348 }
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349 }
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350 }
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351 curwin->w_valid |= VALID_TOPLINE;
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352
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353 /*
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354 * Need to redraw when topline changed.
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355 */
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356 if (curwin->w_topline != old_topline
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357 #ifdef FEAT_DIFF
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358 || curwin->w_topfill != old_topfill
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359 #endif
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360 )
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361 {
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362 dollar_vcol = 0;
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740
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363 if (curwin->w_skipcol != 0)
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7
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364 {
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365 curwin->w_skipcol = 0;
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366 redraw_later(NOT_VALID);
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367 }
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368 else
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369 redraw_later(VALID);
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370 /* May need to set w_skipcol when cursor in w_topline. */
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371 if (curwin->w_cursor.lnum == curwin->w_topline)
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372 validate_cursor();
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373 }
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374
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375 #ifdef FEAT_MOUSE
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376 p_so = save_so;
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377 #endif
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378 }
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379
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380 /*
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532
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381 * Return the scrolljump value to use for the current window.
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382 * When 'scrolljump' is positive use it as-is.
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383 * When 'scrolljump' is negative use it as a percentage of the window height.
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384 */
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385 static int
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386 scrolljump_value()
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387 {
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388 if (p_sj >= 0)
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389 return (int)p_sj;
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390 return (curwin->w_height * -p_sj) / 100;
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391 }
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392
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393 /*
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7
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394 * Return TRUE when there are not 'scrolloff' lines above the cursor for the
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395 * current window.
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396 */
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397 static int
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398 check_top_offset()
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399 {
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400 lineoff_T loff;
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401 int n;
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402
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403 if (curwin->w_cursor.lnum < curwin->w_topline + p_so
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404 #ifdef FEAT_FOLDING
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405 || hasAnyFolding(curwin)
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406 #endif
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407 )
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408 {
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409 loff.lnum = curwin->w_cursor.lnum;
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410 #ifdef FEAT_DIFF
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411 loff.fill = 0;
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412 n = curwin->w_topfill; /* always have this context */
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413 #else
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414 n = 0;
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415 #endif
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416 /* Count the visible screen lines above the cursor line. */
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417 while (n < p_so)
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418 {
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419 topline_back(&loff);
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420 /* Stop when included a line above the window. */
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421 if (loff.lnum < curwin->w_topline
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422 #ifdef FEAT_DIFF
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423 || (loff.lnum == curwin->w_topline && loff.fill > 0)
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424 #endif
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|
|
425 )
|
|
|
426 break;
|
|
|
427 n += loff.height;
|
|
|
428 }
|
|
|
429 if (n < p_so)
|
|
|
430 return TRUE;
|
|
|
431 }
|
|
|
432 return FALSE;
|
|
|
433 }
|
|
|
434
|
|
|
435 void
|
|
|
436 update_curswant()
|
|
|
437 {
|
|
|
438 if (curwin->w_set_curswant)
|
|
|
439 {
|
|
|
440 validate_virtcol();
|
|
|
441 curwin->w_curswant = curwin->w_virtcol;
|
|
|
442 curwin->w_set_curswant = FALSE;
|
|
|
443 }
|
|
|
444 }
|
|
|
445
|
|
|
446 /*
|
|
|
447 * Check if the cursor has moved. Set the w_valid flag accordingly.
|
|
|
448 */
|
|
|
449 void
|
|
|
450 check_cursor_moved(wp)
|
|
|
451 win_T *wp;
|
|
|
452 {
|
|
|
453 if (wp->w_cursor.lnum != wp->w_valid_cursor.lnum)
|
|
|
454 {
|
|
|
455 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL
|
|
|
456 |VALID_CHEIGHT|VALID_CROW|VALID_TOPLINE);
|
|
|
457 wp->w_valid_cursor = wp->w_cursor;
|
|
|
458 wp->w_valid_leftcol = wp->w_leftcol;
|
|
|
459 }
|
|
|
460 else if (wp->w_cursor.col != wp->w_valid_cursor.col
|
|
|
461 || wp->w_leftcol != wp->w_valid_leftcol
|
|
|
462 #ifdef FEAT_VIRTUALEDIT
|
|
|
463 || wp->w_cursor.coladd != wp->w_valid_cursor.coladd
|
|
|
464 #endif
|
|
|
465 )
|
|
|
466 {
|
|
|
467 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL);
|
|
|
468 wp->w_valid_cursor.col = wp->w_cursor.col;
|
|
|
469 wp->w_valid_leftcol = wp->w_leftcol;
|
|
|
470 #ifdef FEAT_VIRTUALEDIT
|
|
|
471 wp->w_valid_cursor.coladd = wp->w_cursor.coladd;
|
|
|
472 #endif
|
|
|
473 }
|
|
|
474 }
|
|
|
475
|
|
|
476 /*
|
|
|
477 * Call this function when some window settings have changed, which require
|
|
|
478 * the cursor position, botline and topline to be recomputed and the window to
|
|
|
479 * be redrawn. E.g, when changing the 'wrap' option or folding.
|
|
|
480 */
|
|
|
481 void
|
|
|
482 changed_window_setting()
|
|
|
483 {
|
|
|
484 changed_window_setting_win(curwin);
|
|
|
485 }
|
|
|
486
|
|
|
487 void
|
|
|
488 changed_window_setting_win(wp)
|
|
|
489 win_T *wp;
|
|
|
490 {
|
|
|
491 wp->w_lines_valid = 0;
|
|
|
492 changed_line_abv_curs_win(wp);
|
|
|
493 wp->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP|VALID_TOPLINE);
|
|
|
494 redraw_win_later(wp, NOT_VALID);
|
|
|
495 }
|
|
|
496
|
|
|
497 /*
|
|
|
498 * Set wp->w_topline to a certain number.
|
|
|
499 */
|
|
|
500 void
|
|
|
501 set_topline(wp, lnum)
|
|
|
502 win_T *wp;
|
|
|
503 linenr_T lnum;
|
|
|
504 {
|
|
|
505 #ifdef FEAT_FOLDING
|
|
|
506 /* go to first of folded lines */
|
|
|
507 (void)hasFoldingWin(wp, lnum, &lnum, NULL, TRUE, NULL);
|
|
|
508 #endif
|
|
|
509 /* Approximate the value of w_botline */
|
|
|
510 wp->w_botline += lnum - wp->w_topline;
|
|
|
511 wp->w_topline = lnum;
|
|
|
512 #ifdef FEAT_DIFF
|
|
|
513 wp->w_topfill = 0;
|
|
|
514 #endif
|
|
|
515 wp->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_TOPLINE);
|
|
|
516 /* Don't set VALID_TOPLINE here, 'scrolloff' needs to be checked. */
|
|
|
517 redraw_later(VALID);
|
|
|
518 }
|
|
|
519
|
|
|
520 /*
|
|
|
521 * Call this function when the length of the cursor line (in screen
|
|
|
522 * characters) has changed, and the change is before the cursor.
|
|
|
523 * Need to take care of w_botline separately!
|
|
|
524 */
|
|
|
525 void
|
|
|
526 changed_cline_bef_curs()
|
|
|
527 {
|
|
|
528 curwin->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL
|
|
|
529 |VALID_CHEIGHT|VALID_TOPLINE);
|
|
|
530 }
|
|
|
531
|
|
|
532 void
|
|
|
533 changed_cline_bef_curs_win(wp)
|
|
|
534 win_T *wp;
|
|
|
535 {
|
|
|
536 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL
|
|
|
537 |VALID_CHEIGHT|VALID_TOPLINE);
|
|
|
538 }
|
|
|
539
|
|
|
540 #if 0 /* not used */
|
|
|
541 /*
|
|
|
542 * Call this function when the length of the cursor line (in screen
|
|
|
543 * characters) has changed, and the position of the cursor doesn't change.
|
|
|
544 * Need to take care of w_botline separately!
|
|
|
545 */
|
|
|
546 void
|
|
|
547 changed_cline_aft_curs()
|
|
|
548 {
|
|
|
549 curwin->w_valid &= ~VALID_CHEIGHT;
|
|
|
550 }
|
|
|
551 #endif
|
|
|
552
|
|
|
553 /*
|
|
|
554 * Call this function when the length of a line (in screen characters) above
|
|
|
555 * the cursor have changed.
|
|
|
556 * Need to take care of w_botline separately!
|
|
|
557 */
|
|
|
558 void
|
|
|
559 changed_line_abv_curs()
|
|
|
560 {
|
|
|
561 curwin->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL|VALID_CROW
|
|
|
562 |VALID_CHEIGHT|VALID_TOPLINE);
|
|
|
563 }
|
|
|
564
|
|
|
565 void
|
|
|
566 changed_line_abv_curs_win(wp)
|
|
|
567 win_T *wp;
|
|
|
568 {
|
|
|
569 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL|VALID_CROW
|
|
|
570 |VALID_CHEIGHT|VALID_TOPLINE);
|
|
|
571 }
|
|
|
572
|
|
|
573 /*
|
|
|
574 * Make sure the value of curwin->w_botline is valid.
|
|
|
575 */
|
|
|
576 void
|
|
|
577 validate_botline()
|
|
|
578 {
|
|
|
579 if (!(curwin->w_valid & VALID_BOTLINE))
|
|
|
580 comp_botline(curwin);
|
|
|
581 }
|
|
|
582
|
|
|
583 /*
|
|
|
584 * Make sure the value of wp->w_botline is valid.
|
|
|
585 */
|
|
|
586 static void
|
|
|
587 validate_botline_win(wp)
|
|
|
588 win_T *wp;
|
|
|
589 {
|
|
|
590 if (!(wp->w_valid & VALID_BOTLINE))
|
|
|
591 comp_botline(wp);
|
|
|
592 }
|
|
|
593
|
|
|
594 /*
|
|
|
595 * Mark curwin->w_botline as invalid (because of some change in the buffer).
|
|
|
596 */
|
|
|
597 void
|
|
|
598 invalidate_botline()
|
|
|
599 {
|
|
|
600 curwin->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
|
601 }
|
|
|
602
|
|
|
603 void
|
|
|
604 invalidate_botline_win(wp)
|
|
|
605 win_T *wp;
|
|
|
606 {
|
|
|
607 wp->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
|
608 }
|
|
|
609
|
|
|
610 #if 0 /* never used */
|
|
|
611 /*
|
|
|
612 * Mark curwin->w_botline as approximated (because of some small change in the
|
|
|
613 * buffer).
|
|
|
614 */
|
|
|
615 void
|
|
|
616 approximate_botline()
|
|
|
617 {
|
|
|
618 curwin->w_valid &= ~VALID_BOTLINE;
|
|
|
619 }
|
|
|
620 #endif
|
|
|
621
|
|
|
622 void
|
|
|
623 approximate_botline_win(wp)
|
|
|
624 win_T *wp;
|
|
|
625 {
|
|
|
626 wp->w_valid &= ~VALID_BOTLINE;
|
|
|
627 }
|
|
|
628
|
|
|
629 #if 0 /* not used */
|
|
|
630 /*
|
|
|
631 * Return TRUE if curwin->w_botline is valid.
|
|
|
632 */
|
|
|
633 int
|
|
|
634 botline_valid()
|
|
|
635 {
|
|
|
636 return (curwin->w_valid & VALID_BOTLINE);
|
|
|
637 }
|
|
|
638 #endif
|
|
|
639
|
|
|
640 #if 0 /* not used */
|
|
|
641 /*
|
|
|
642 * Return TRUE if curwin->w_botline is valid or approximated.
|
|
|
643 */
|
|
|
644 int
|
|
|
645 botline_approximated()
|
|
|
646 {
|
|
|
647 return (curwin->w_valid & VALID_BOTLINE_AP);
|
|
|
648 }
|
|
|
649 #endif
|
|
|
650
|
|
|
651 /*
|
|
|
652 * Return TRUE if curwin->w_wrow and curwin->w_wcol are valid.
|
|
|
653 */
|
|
|
654 int
|
|
|
655 cursor_valid()
|
|
|
656 {
|
|
|
657 check_cursor_moved(curwin);
|
|
|
658 return ((curwin->w_valid & (VALID_WROW|VALID_WCOL)) ==
|
|
|
659 (VALID_WROW|VALID_WCOL));
|
|
|
660 }
|
|
|
661
|
|
|
662 /*
|
|
|
663 * Validate cursor position. Makes sure w_wrow and w_wcol are valid.
|
|
|
664 * w_topline must be valid, you may need to call update_topline() first!
|
|
|
665 */
|
|
|
666 void
|
|
|
667 validate_cursor()
|
|
|
668 {
|
|
|
669 check_cursor_moved(curwin);
|
|
|
670 if ((curwin->w_valid & (VALID_WCOL|VALID_WROW)) != (VALID_WCOL|VALID_WROW))
|
|
|
671 curs_columns(TRUE);
|
|
|
672 }
|
|
|
673
|
|
|
674 #if defined(FEAT_GUI) || defined(PROTO)
|
|
|
675 /*
|
|
|
676 * validate w_cline_row.
|
|
|
677 */
|
|
|
678 void
|
|
|
679 validate_cline_row()
|
|
|
680 {
|
|
|
681 /*
|
|
|
682 * First make sure that w_topline is valid (after moving the cursor).
|
|
|
683 */
|
|
|
684 update_topline();
|
|
|
685 check_cursor_moved(curwin);
|
|
|
686 if (!(curwin->w_valid & VALID_CROW))
|
|
|
687 curs_rows(curwin, FALSE);
|
|
|
688 }
|
|
|
689 #endif
|
|
|
690
|
|
|
691 /*
|
|
|
692 * Compute wp->w_cline_row and wp->w_cline_height, based on the current value
|
|
|
693 * of wp->w_topine.
|
|
|
694 *
|
|
|
695 * Returns OK when cursor is in the window, FAIL when it isn't.
|
|
|
696 */
|
|
|
697 static void
|
|
|
698 curs_rows(wp, do_botline)
|
|
|
699 win_T *wp;
|
|
|
700 int do_botline; /* also compute w_botline */
|
|
|
701 {
|
|
|
702 linenr_T lnum;
|
|
|
703 int i;
|
|
|
704 int all_invalid;
|
|
|
705 int valid;
|
|
|
706 #ifdef FEAT_FOLDING
|
|
|
707 long fold_count;
|
|
|
708 #endif
|
|
|
709
|
|
|
710 /* Check if wp->w_lines[].wl_size is invalid */
|
|
|
711 all_invalid = (!redrawing()
|
|
|
712 || wp->w_lines_valid == 0
|
|
|
713 || wp->w_lines[0].wl_lnum > wp->w_topline);
|
|
|
714 i = 0;
|
|
|
715 wp->w_cline_row = 0;
|
|
|
716 for (lnum = wp->w_topline; lnum < wp->w_cursor.lnum; ++i)
|
|
|
717 {
|
|
|
718 valid = FALSE;
|
|
|
719 if (!all_invalid && i < wp->w_lines_valid)
|
|
|
720 {
|
|
|
721 if (wp->w_lines[i].wl_lnum < lnum || !wp->w_lines[i].wl_valid)
|
|
|
722 continue; /* skip changed or deleted lines */
|
|
|
723 if (wp->w_lines[i].wl_lnum == lnum)
|
|
|
724 {
|
|
|
725 #ifdef FEAT_FOLDING
|
|
|
726 /* Check for newly inserted lines below this row, in which
|
|
|
727 * case we need to check for folded lines. */
|
|
|
728 if (!wp->w_buffer->b_mod_set
|
|
|
729 || wp->w_lines[i].wl_lastlnum < wp->w_cursor.lnum
|
|
|
730 || wp->w_buffer->b_mod_top
|
|
|
731 > wp->w_lines[i].wl_lastlnum + 1)
|
|
|
732 #endif
|
|
|
733 valid = TRUE;
|
|
|
734 }
|
|
|
735 else if (wp->w_lines[i].wl_lnum > lnum)
|
|
|
736 --i; /* hold at inserted lines */
|
|
|
737 }
|
|
|
738 if (valid
|
|
|
739 #ifdef FEAT_DIFF
|
|
|
740 && (lnum != wp->w_topline || !wp->w_p_diff)
|
|
|
741 #endif
|
|
|
742 )
|
|
|
743 {
|
|
|
744 #ifdef FEAT_FOLDING
|
|
|
745 lnum = wp->w_lines[i].wl_lastlnum + 1;
|
|
|
746 /* Cursor inside folded lines, don't count this row */
|
|
|
747 if (lnum > wp->w_cursor.lnum)
|
|
|
748 break;
|
|
|
749 #else
|
|
|
750 ++lnum;
|
|
|
751 #endif
|
|
|
752 wp->w_cline_row += wp->w_lines[i].wl_size;
|
|
|
753 }
|
|
|
754 else
|
|
|
755 {
|
|
|
756 #ifdef FEAT_FOLDING
|
|
|
757 fold_count = foldedCount(wp, lnum, NULL);
|
|
|
758 if (fold_count)
|
|
|
759 {
|
|
|
760 lnum += fold_count;
|
|
|
761 if (lnum > wp->w_cursor.lnum)
|
|
|
762 break;
|
|
|
763 ++wp->w_cline_row;
|
|
|
764 }
|
|
|
765 else
|
|
|
766 #endif
|
|
|
767 #ifdef FEAT_DIFF
|
|
|
768 if (lnum == wp->w_topline)
|
|
|
769 wp->w_cline_row += plines_win_nofill(wp, lnum++, TRUE)
|
|
|
770 + wp->w_topfill;
|
|
|
771 else
|
|
|
772 #endif
|
|
|
773 wp->w_cline_row += plines_win(wp, lnum++, TRUE);
|
|
|
774 }
|
|
|
775 }
|
|
|
776
|
|
|
777 check_cursor_moved(wp);
|
|
|
778 if (!(wp->w_valid & VALID_CHEIGHT))
|
|
|
779 {
|
|
|
780 if (all_invalid
|
|
|
781 || i == wp->w_lines_valid
|
|
|
782 || (i < wp->w_lines_valid
|
|
|
783 && (!wp->w_lines[i].wl_valid
|
|
|
784 || wp->w_lines[i].wl_lnum != wp->w_cursor.lnum)))
|
|
|
785 {
|
|
|
786 #ifdef FEAT_DIFF
|
|
|
787 if (wp->w_cursor.lnum == wp->w_topline)
|
|
|
788 wp->w_cline_height = plines_win_nofill(wp, wp->w_cursor.lnum,
|
|
|
789 TRUE) + wp->w_topfill;
|
|
|
790 else
|
|
|
791 #endif
|
|
|
792 wp->w_cline_height = plines_win(wp, wp->w_cursor.lnum, TRUE);
|
|
|
793 #ifdef FEAT_FOLDING
|
|
|
794 wp->w_cline_folded = hasFoldingWin(wp, wp->w_cursor.lnum,
|
|
|
795 NULL, NULL, TRUE, NULL);
|
|
|
796 #endif
|
|
|
797 }
|
|
|
798 else if (i > wp->w_lines_valid)
|
|
|
799 {
|
|
|
800 /* a line that is too long to fit on the last screen line */
|
|
|
801 wp->w_cline_height = 0;
|
|
|
802 #ifdef FEAT_FOLDING
|
|
|
803 wp->w_cline_folded = hasFoldingWin(wp, wp->w_cursor.lnum,
|
|
|
804 NULL, NULL, TRUE, NULL);
|
|
|
805 #endif
|
|
|
806 }
|
|
|
807 else
|
|
|
808 {
|
|
|
809 wp->w_cline_height = wp->w_lines[i].wl_size;
|
|
|
810 #ifdef FEAT_FOLDING
|
|
|
811 wp->w_cline_folded = wp->w_lines[i].wl_folded;
|
|
|
812 #endif
|
|
|
813 }
|
|
|
814 }
|
|
|
815
|
|
|
816 wp->w_valid |= VALID_CROW|VALID_CHEIGHT;
|
|
|
817
|
|
|
818 /* validate botline too, if update_screen doesn't do it */
|
|
|
819 if (do_botline && all_invalid)
|
|
|
820 validate_botline_win(wp);
|
|
|
821 }
|
|
|
822
|
|
|
823 /*
|
|
|
824 * Validate curwin->w_virtcol only.
|
|
|
825 */
|
|
|
826 void
|
|
|
827 validate_virtcol()
|
|
|
828 {
|
|
|
829 validate_virtcol_win(curwin);
|
|
|
830 }
|
|
|
831
|
|
|
832 /*
|
|
|
833 * Validate wp->w_virtcol only.
|
|
|
834 */
|
|
|
835 void
|
|
|
836 validate_virtcol_win(wp)
|
|
|
837 win_T *wp;
|
|
|
838 {
|
|
|
839 check_cursor_moved(wp);
|
|
|
840 if (!(wp->w_valid & VALID_VIRTCOL))
|
|
|
841 {
|
|
|
842 getvvcol(wp, &wp->w_cursor, NULL, &(wp->w_virtcol), NULL);
|
|
|
843 wp->w_valid |= VALID_VIRTCOL;
|
|
740
|
844 #ifdef FEAT_SYN_HL
|
|
752
|
845 if (wp->w_p_cuc
|
|
|
846 # ifdef FEAT_INS_EXPAND
|
|
|
847 && !pum_visible()
|
|
|
848 # endif
|
|
|
849 )
|
|
740
|
850 redraw_win_later(wp, SOME_VALID);
|
|
|
851 #endif
|
|
7
|
852 }
|
|
|
853 }
|
|
|
854
|
|
|
855 /*
|
|
|
856 * Validate curwin->w_cline_height only.
|
|
|
857 */
|
|
|
858 static void
|
|
|
859 validate_cheight()
|
|
|
860 {
|
|
|
861 check_cursor_moved(curwin);
|
|
|
862 if (!(curwin->w_valid & VALID_CHEIGHT))
|
|
|
863 {
|
|
|
864 #ifdef FEAT_DIFF
|
|
|
865 if (curwin->w_cursor.lnum == curwin->w_topline)
|
|
|
866 curwin->w_cline_height = plines_nofill(curwin->w_cursor.lnum)
|
|
|
867 + curwin->w_topfill;
|
|
|
868 else
|
|
|
869 #endif
|
|
|
870 curwin->w_cline_height = plines(curwin->w_cursor.lnum);
|
|
|
871 #ifdef FEAT_FOLDING
|
|
|
872 curwin->w_cline_folded = hasFolding(curwin->w_cursor.lnum, NULL, NULL);
|
|
|
873 #endif
|
|
|
874 curwin->w_valid |= VALID_CHEIGHT;
|
|
|
875 }
|
|
|
876 }
|
|
|
877
|
|
|
878 /*
|
|
|
879 * validate w_wcol and w_virtcol only. Only correct when 'wrap' on!
|
|
|
880 */
|
|
|
881 void
|
|
|
882 validate_cursor_col()
|
|
|
883 {
|
|
|
884 colnr_T off;
|
|
|
885 colnr_T col;
|
|
|
886
|
|
|
887 validate_virtcol();
|
|
|
888 if (!(curwin->w_valid & VALID_WCOL))
|
|
|
889 {
|
|
|
890 col = curwin->w_virtcol;
|
|
|
891 off = curwin_col_off();
|
|
|
892 col += off;
|
|
|
893
|
|
|
894 /* long line wrapping, adjust curwin->w_wrow */
|
|
|
895 if (curwin->w_p_wrap && col >= (colnr_T)W_WIDTH(curwin)
|
|
119
|
896 && W_WIDTH(curwin) - off + curwin_col_off2() > 0)
|
|
7
|
897 {
|
|
|
898 col -= W_WIDTH(curwin);
|
|
|
899 col = col % (W_WIDTH(curwin) - off + curwin_col_off2());
|
|
|
900 }
|
|
|
901 curwin->w_wcol = col;
|
|
|
902 curwin->w_valid |= VALID_WCOL;
|
|
|
903 }
|
|
|
904 }
|
|
|
905
|
|
|
906 /*
|
|
|
907 * Compute offset of a window, occupied by line number, fold column and sign
|
|
|
908 * column (these don't move when scrolling horizontally).
|
|
|
909 */
|
|
|
910 int
|
|
|
911 win_col_off(wp)
|
|
|
912 win_T *wp;
|
|
|
913 {
|
|
13
|
914 return ((wp->w_p_nu ? number_width(wp) + 1 : 0)
|
|
7
|
915 #ifdef FEAT_CMDWIN
|
|
|
916 + (cmdwin_type == 0 || wp != curwin ? 0 : 1)
|
|
|
917 #endif
|
|
|
918 #ifdef FEAT_FOLDING
|
|
|
919 + wp->w_p_fdc
|
|
|
920 #endif
|
|
|
921 #ifdef FEAT_SIGNS
|
|
|
922 + (
|
|
|
923 # ifdef FEAT_NETBEANS_INTG
|
|
|
924 /* always show glyph gutter in netbeans */
|
|
|
925 usingNetbeans ||
|
|
|
926 # endif
|
|
|
927 wp->w_buffer->b_signlist != NULL ? 2 : 0)
|
|
|
928 #endif
|
|
|
929 );
|
|
|
930 }
|
|
|
931
|
|
|
932 int
|
|
|
933 curwin_col_off()
|
|
|
934 {
|
|
|
935 return win_col_off(curwin);
|
|
|
936 }
|
|
|
937
|
|
|
938 /*
|
|
|
939 * Return the difference in column offset for the second screen line of a
|
|
|
940 * wrapped line. It's 8 if 'number' is on and 'n' is in 'cpoptions'.
|
|
|
941 */
|
|
|
942 int
|
|
|
943 win_col_off2(wp)
|
|
|
944 win_T *wp;
|
|
|
945 {
|
|
|
946 if (wp->w_p_nu && vim_strchr(p_cpo, CPO_NUMCOL) != NULL)
|
|
13
|
947 return number_width(wp) + 1;
|
|
7
|
948 return 0;
|
|
|
949 }
|
|
|
950
|
|
|
951 int
|
|
|
952 curwin_col_off2()
|
|
|
953 {
|
|
|
954 return win_col_off2(curwin);
|
|
|
955 }
|
|
|
956
|
|
|
957 /*
|
|
|
958 * compute curwin->w_wcol and curwin->w_virtcol.
|
|
|
959 * Also updates curwin->w_wrow and curwin->w_cline_row.
|
|
|
960 * Also updates curwin->w_leftcol.
|
|
|
961 */
|
|
|
962 void
|
|
|
963 curs_columns(scroll)
|
|
|
964 int scroll; /* when TRUE, may scroll horizontally */
|
|
|
965 {
|
|
|
966 int diff;
|
|
|
967 int extra; /* offset for first screen line */
|
|
|
968 int off_left, off_right;
|
|
|
969 int n;
|
|
|
970 int p_lines;
|
|
|
971 int width = 0;
|
|
|
972 int textwidth;
|
|
|
973 int new_leftcol;
|
|
|
974 colnr_T startcol;
|
|
|
975 colnr_T endcol;
|
|
|
976 colnr_T prev_skipcol;
|
|
|
977
|
|
|
978 /*
|
|
|
979 * First make sure that w_topline is valid (after moving the cursor).
|
|
|
980 */
|
|
|
981 update_topline();
|
|
|
982
|
|
|
983 /*
|
|
|
984 * Next make sure that w_cline_row is valid.
|
|
|
985 */
|
|
|
986 if (!(curwin->w_valid & VALID_CROW))
|
|
|
987 curs_rows(curwin, FALSE);
|
|
|
988
|
|
|
989 /*
|
|
|
990 * Compute the number of virtual columns.
|
|
|
991 */
|
|
|
992 #ifdef FEAT_FOLDING
|
|
|
993 if (curwin->w_cline_folded)
|
|
|
994 /* In a folded line the cursor is always in the first column */
|
|
|
995 startcol = curwin->w_virtcol = endcol = curwin->w_leftcol;
|
|
|
996 else
|
|
|
997 #endif
|
|
|
998 getvvcol(curwin, &curwin->w_cursor,
|
|
|
999 &startcol, &(curwin->w_virtcol), &endcol);
|
|
|
1000
|
|
|
1001 /* remove '$' from change command when cursor moves onto it */
|
|
|
1002 if (startcol > dollar_vcol)
|
|
|
1003 dollar_vcol = 0;
|
|
|
1004
|
|
|
1005 extra = curwin_col_off();
|
|
|
1006 curwin->w_wcol = curwin->w_virtcol + extra;
|
|
|
1007 endcol += extra;
|
|
|
1008
|
|
|
1009 /*
|
|
|
1010 * Now compute w_wrow, counting screen lines from w_cline_row.
|
|
|
1011 */
|
|
|
1012 curwin->w_wrow = curwin->w_cline_row;
|
|
|
1013
|
|
|
1014 textwidth = W_WIDTH(curwin) - extra;
|
|
|
1015 if (textwidth <= 0)
|
|
|
1016 {
|
|
|
1017 /* No room for text, put cursor in last char of window. */
|
|
|
1018 curwin->w_wcol = W_WIDTH(curwin) - 1;
|
|
|
1019 curwin->w_wrow = curwin->w_height - 1;
|
|
|
1020 }
|
|
|
1021 else if (curwin->w_p_wrap
|
|
|
1022 #ifdef FEAT_VERTSPLIT
|
|
|
1023 && curwin->w_width != 0
|
|
|
1024 #endif
|
|
|
1025 )
|
|
|
1026 {
|
|
|
1027 width = textwidth + curwin_col_off2();
|
|
|
1028
|
|
|
1029 /* long line wrapping, adjust curwin->w_wrow */
|
|
|
1030 if (curwin->w_wcol >= W_WIDTH(curwin))
|
|
|
1031 {
|
|
|
1032 n = (curwin->w_wcol - W_WIDTH(curwin)) / width + 1;
|
|
|
1033 curwin->w_wcol -= n * width;
|
|
|
1034 curwin->w_wrow += n;
|
|
|
1035
|
|
|
1036 #ifdef FEAT_LINEBREAK
|
|
|
1037 /* When cursor wraps to first char of next line in Insert
|
|
|
1038 * mode, the 'showbreak' string isn't shown, backup to first
|
|
|
1039 * column */
|
|
|
1040 if (*p_sbr && *ml_get_cursor() == NUL
|
|
|
1041 && curwin->w_wcol == (int)vim_strsize(p_sbr))
|
|
|
1042 curwin->w_wcol = 0;
|
|
|
1043 #endif
|
|
|
1044 }
|
|
|
1045 }
|
|
|
1046
|
|
|
1047 /* No line wrapping: compute curwin->w_leftcol if scrolling is on and line
|
|
|
1048 * is not folded.
|
|
|
1049 * If scrolling is off, curwin->w_leftcol is assumed to be 0 */
|
|
|
1050 else if (scroll
|
|
|
1051 #ifdef FEAT_FOLDING
|
|
|
1052 && !curwin->w_cline_folded
|
|
|
1053 #endif
|
|
|
1054 )
|
|
|
1055 {
|
|
|
1056 /*
|
|
|
1057 * If Cursor is left of the screen, scroll rightwards.
|
|
|
1058 * If Cursor is right of the screen, scroll leftwards
|
|
|
1059 * If we get closer to the edge than 'sidescrolloff', scroll a little
|
|
|
1060 * extra
|
|
|
1061 */
|
|
|
1062 off_left = (int)startcol - (int)curwin->w_leftcol - p_siso;
|
|
|
1063 off_right = (int)endcol - (int)(curwin->w_leftcol + W_WIDTH(curwin)
|
|
|
1064 - p_siso) + 1;
|
|
|
1065 if (off_left < 0 || off_right > 0)
|
|
|
1066 {
|
|
|
1067 if (off_left < 0)
|
|
|
1068 diff = -off_left;
|
|
|
1069 else
|
|
|
1070 diff = off_right;
|
|
|
1071
|
|
|
1072 /* When far off or not enough room on either side, put cursor in
|
|
|
1073 * middle of window. */
|
|
|
1074 if (p_ss == 0 || diff >= textwidth / 2 || off_right >= off_left)
|
|
|
1075 new_leftcol = curwin->w_wcol - extra - textwidth / 2;
|
|
|
1076 else
|
|
|
1077 {
|
|
|
1078 if (diff < p_ss)
|
|
|
1079 diff = p_ss;
|
|
|
1080 if (off_left < 0)
|
|
|
1081 new_leftcol = curwin->w_leftcol - diff;
|
|
|
1082 else
|
|
|
1083 new_leftcol = curwin->w_leftcol + diff;
|
|
|
1084 }
|
|
|
1085 if (new_leftcol < 0)
|
|
|
1086 new_leftcol = 0;
|
|
|
1087 if (new_leftcol != (int)curwin->w_leftcol)
|
|
|
1088 {
|
|
|
1089 curwin->w_leftcol = new_leftcol;
|
|
|
1090 /* screen has to be redrawn with new curwin->w_leftcol */
|
|
|
1091 redraw_later(NOT_VALID);
|
|
|
1092 }
|
|
|
1093 }
|
|
|
1094 curwin->w_wcol -= curwin->w_leftcol;
|
|
|
1095 }
|
|
|
1096 else if (curwin->w_wcol > (int)curwin->w_leftcol)
|
|
|
1097 curwin->w_wcol -= curwin->w_leftcol;
|
|
|
1098 else
|
|
|
1099 curwin->w_wcol = 0;
|
|
|
1100
|
|
|
1101 #ifdef FEAT_DIFF
|
|
|
1102 /* Skip over filler lines. At the top use w_topfill, there
|
|
|
1103 * may be some filler lines above the window. */
|
|
|
1104 if (curwin->w_cursor.lnum == curwin->w_topline)
|
|
|
1105 curwin->w_wrow += curwin->w_topfill;
|
|
|
1106 else
|
|
|
1107 curwin->w_wrow += diff_check_fill(curwin, curwin->w_cursor.lnum);
|
|
|
1108 #endif
|
|
|
1109
|
|
|
1110 prev_skipcol = curwin->w_skipcol;
|
|
|
1111
|
|
|
1112 p_lines = 0;
|
|
|
1113 if ((curwin->w_wrow >= curwin->w_height
|
|
|
1114 || ((prev_skipcol > 0
|
|
|
1115 || curwin->w_wrow + p_so >= curwin->w_height)
|
|
|
1116 && (p_lines =
|
|
|
1117 #ifdef FEAT_DIFF
|
|
|
1118 plines_win_nofill
|
|
|
1119 #else
|
|
|
1120 plines_win
|
|
|
1121 #endif
|
|
|
1122 (curwin, curwin->w_cursor.lnum, FALSE))
|
|
|
1123 - 1 >= curwin->w_height))
|
|
|
1124 && curwin->w_height != 0
|
|
|
1125 && curwin->w_cursor.lnum == curwin->w_topline
|
|
|
1126 && width > 0
|
|
|
1127 #ifdef FEAT_VERTSPLIT
|
|
|
1128 && curwin->w_width != 0
|
|
|
1129 #endif
|
|
|
1130 )
|
|
|
1131 {
|
|
|
1132 /* Cursor past end of screen. Happens with a single line that does
|
|
|
1133 * not fit on screen. Find a skipcol to show the text around the
|
|
|
1134 * cursor. Avoid scrolling all the time. compute value of "extra":
|
|
|
1135 * 1: Less than "p_so" lines above
|
|
|
1136 * 2: Less than "p_so" lines below
|
|
|
1137 * 3: both of them */
|
|
|
1138 extra = 0;
|
|
|
1139 if (curwin->w_skipcol + p_so * width > curwin->w_virtcol)
|
|
|
1140 extra = 1;
|
|
|
1141 /* Compute last display line of the buffer line that we want at the
|
|
|
1142 * bottom of the window. */
|
|
|
1143 if (p_lines == 0)
|
|
|
1144 p_lines = plines_win(curwin, curwin->w_cursor.lnum, FALSE);
|
|
|
1145 --p_lines;
|
|
|
1146 if (p_lines > curwin->w_wrow + p_so)
|
|
|
1147 n = curwin->w_wrow + p_so;
|
|
|
1148 else
|
|
|
1149 n = p_lines;
|
|
|
1150 if ((colnr_T)n >= curwin->w_height + curwin->w_skipcol / width)
|
|
|
1151 extra += 2;
|
|
|
1152
|
|
|
1153 if (extra == 3 || p_lines < p_so * 2)
|
|
|
1154 {
|
|
|
1155 /* not enough room for 'scrolloff', put cursor in the middle */
|
|
|
1156 n = curwin->w_virtcol / width;
|
|
|
1157 if (n > curwin->w_height / 2)
|
|
|
1158 n -= curwin->w_height / 2;
|
|
|
1159 else
|
|
|
1160 n = 0;
|
|
|
1161 /* don't skip more than necessary */
|
|
|
1162 if (n > p_lines - curwin->w_height + 1)
|
|
|
1163 n = p_lines - curwin->w_height + 1;
|
|
|
1164 curwin->w_skipcol = n * width;
|
|
|
1165 }
|
|
|
1166 else if (extra == 1)
|
|
|
1167 {
|
|
|
1168 /* less then 'scrolloff' lines above, decrease skipcol */
|
|
|
1169 extra = (curwin->w_skipcol + p_so * width - curwin->w_virtcol
|
|
|
1170 + width - 1) / width;
|
|
|
1171 if (extra > 0)
|
|
|
1172 {
|
|
|
1173 if ((colnr_T)(extra * width) > curwin->w_skipcol)
|
|
|
1174 extra = curwin->w_skipcol / width;
|
|
|
1175 curwin->w_skipcol -= extra * width;
|
|
|
1176 }
|
|
|
1177 }
|
|
|
1178 else if (extra == 2)
|
|
|
1179 {
|
|
|
1180 /* less then 'scrolloff' lines below, increase skipcol */
|
|
|
1181 endcol = (n - curwin->w_height + 1) * width;
|
|
|
1182 while (endcol > curwin->w_virtcol)
|
|
|
1183 endcol -= width;
|
|
|
1184 if (endcol > curwin->w_skipcol)
|
|
|
1185 curwin->w_skipcol = endcol;
|
|
|
1186 }
|
|
|
1187
|
|
|
1188 curwin->w_wrow -= curwin->w_skipcol / width;
|
|
|
1189 if (curwin->w_wrow >= curwin->w_height)
|
|
|
1190 {
|
|
|
1191 /* small window, make sure cursor is in it */
|
|
|
1192 extra = curwin->w_wrow - curwin->w_height + 1;
|
|
|
1193 curwin->w_skipcol += extra * width;
|
|
|
1194 curwin->w_wrow -= extra;
|
|
|
1195 }
|
|
|
1196
|
|
|
1197 extra = ((int)prev_skipcol - (int)curwin->w_skipcol) / width;
|
|
|
1198 if (extra > 0)
|
|
|
1199 win_ins_lines(curwin, 0, extra, FALSE, FALSE);
|
|
|
1200 else if (extra < 0)
|
|
|
1201 win_del_lines(curwin, 0, -extra, FALSE, FALSE);
|
|
|
1202 }
|
|
|
1203 else
|
|
|
1204 curwin->w_skipcol = 0;
|
|
|
1205 if (prev_skipcol != curwin->w_skipcol)
|
|
|
1206 redraw_later(NOT_VALID);
|
|
|
1207
|
|
740
|
1208 #ifdef FEAT_SYN_HL
|
|
|
1209 /* Redraw when w_virtcol changes and 'cursorcolumn' is set, or when w_row
|
|
|
1210 * changes and 'cursorline' is set. */
|
|
752
|
1211 if (((curwin->w_p_cuc && (curwin->w_valid & VALID_VIRTCOL) == 0)
|
|
|
1212 || (curwin->w_p_cul && (curwin->w_valid & VALID_WROW) == 0))
|
|
|
1213 # ifdef FEAT_INS_EXPAND
|
|
|
1214 && !pum_visible()
|
|
|
1215 # endif
|
|
|
1216 )
|
|
740
|
1217 redraw_later(SOME_VALID);
|
|
|
1218 #endif
|
|
|
1219
|
|
7
|
1220 curwin->w_valid |= VALID_WCOL|VALID_WROW|VALID_VIRTCOL;
|
|
|
1221 }
|
|
|
1222
|
|
|
1223 /*
|
|
|
1224 * Scroll the current window down by "line_count" logical lines. "CTRL-Y"
|
|
|
1225 */
|
|
|
1226 /*ARGSUSED*/
|
|
|
1227 void
|
|
|
1228 scrolldown(line_count, byfold)
|
|
|
1229 long line_count;
|
|
|
1230 int byfold; /* TRUE: count a closed fold as one line */
|
|
|
1231 {
|
|
|
1232 long done = 0; /* total # of physical lines done */
|
|
|
1233 int wrow;
|
|
|
1234 int moved = FALSE;
|
|
|
1235
|
|
|
1236 #ifdef FEAT_FOLDING
|
|
|
1237 linenr_T first;
|
|
|
1238
|
|
|
1239 /* Make sure w_topline is at the first of a sequence of folded lines. */
|
|
|
1240 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
|
1241 #endif
|
|
|
1242 validate_cursor(); /* w_wrow needs to be valid */
|
|
|
1243 while (line_count-- > 0)
|
|
|
1244 {
|
|
|
1245 #ifdef FEAT_DIFF
|
|
|
1246 if (curwin->w_topfill < diff_check(curwin, curwin->w_topline))
|
|
|
1247 {
|
|
|
1248 ++curwin->w_topfill;
|
|
|
1249 ++done;
|
|
|
1250 }
|
|
|
1251 else
|
|
|
1252 #endif
|
|
|
1253 {
|
|
|
1254 if (curwin->w_topline == 1)
|
|
|
1255 break;
|
|
|
1256 --curwin->w_topline;
|
|
|
1257 #ifdef FEAT_DIFF
|
|
|
1258 curwin->w_topfill = 0;
|
|
|
1259 #endif
|
|
|
1260 #ifdef FEAT_FOLDING
|
|
|
1261 /* A sequence of folded lines only counts for one logical line */
|
|
|
1262 if (hasFolding(curwin->w_topline, &first, NULL))
|
|
|
1263 {
|
|
|
1264 ++done;
|
|
|
1265 if (!byfold)
|
|
|
1266 line_count -= curwin->w_topline - first - 1;
|
|
|
1267 curwin->w_botline -= curwin->w_topline - first;
|
|
|
1268 curwin->w_topline = first;
|
|
|
1269 }
|
|
|
1270 else
|
|
|
1271 #endif
|
|
|
1272 #ifdef FEAT_DIFF
|
|
|
1273 done += plines_nofill(curwin->w_topline);
|
|
|
1274 #else
|
|
|
1275 done += plines(curwin->w_topline);
|
|
|
1276 #endif
|
|
|
1277 }
|
|
|
1278 --curwin->w_botline; /* approximate w_botline */
|
|
|
1279 invalidate_botline();
|
|
|
1280 }
|
|
|
1281 curwin->w_wrow += done; /* keep w_wrow updated */
|
|
|
1282 curwin->w_cline_row += done; /* keep w_cline_row updated */
|
|
|
1283
|
|
|
1284 #ifdef FEAT_DIFF
|
|
|
1285 if (curwin->w_cursor.lnum == curwin->w_topline)
|
|
|
1286 curwin->w_cline_row = 0;
|
|
|
1287 check_topfill(curwin, TRUE);
|
|
|
1288 #endif
|
|
|
1289
|
|
|
1290 /*
|
|
|
1291 * Compute the row number of the last row of the cursor line
|
|
|
1292 * and move the cursor onto the displayed part of the window.
|
|
|
1293 */
|
|
|
1294 wrow = curwin->w_wrow;
|
|
|
1295 if (curwin->w_p_wrap
|
|
|
1296 #ifdef FEAT_VERTSPLIT
|
|
|
1297 && curwin->w_width != 0
|
|
|
1298 #endif
|
|
|
1299 )
|
|
|
1300 {
|
|
|
1301 validate_virtcol();
|
|
|
1302 validate_cheight();
|
|
|
1303 wrow += curwin->w_cline_height - 1 -
|
|
|
1304 curwin->w_virtcol / W_WIDTH(curwin);
|
|
|
1305 }
|
|
|
1306 while (wrow >= curwin->w_height && curwin->w_cursor.lnum > 1)
|
|
|
1307 {
|
|
|
1308 #ifdef FEAT_FOLDING
|
|
|
1309 if (hasFolding(curwin->w_cursor.lnum, &first, NULL))
|
|
|
1310 {
|
|
|
1311 --wrow;
|
|
|
1312 if (first == 1)
|
|
|
1313 curwin->w_cursor.lnum = 1;
|
|
|
1314 else
|
|
|
1315 curwin->w_cursor.lnum = first - 1;
|
|
|
1316 }
|
|
|
1317 else
|
|
|
1318 #endif
|
|
|
1319 wrow -= plines(curwin->w_cursor.lnum--);
|
|
|
1320 curwin->w_valid &=
|
|
|
1321 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW|VALID_VIRTCOL);
|
|
|
1322 moved = TRUE;
|
|
|
1323 }
|
|
|
1324 if (moved)
|
|
|
1325 {
|
|
|
1326 #ifdef FEAT_FOLDING
|
|
|
1327 /* Move cursor to first line of closed fold. */
|
|
|
1328 foldAdjustCursor();
|
|
|
1329 #endif
|
|
|
1330 coladvance(curwin->w_curswant);
|
|
|
1331 }
|
|
|
1332 }
|
|
|
1333
|
|
|
1334 /*
|
|
|
1335 * Scroll the current window up by "line_count" logical lines. "CTRL-E"
|
|
|
1336 */
|
|
|
1337 /*ARGSUSED*/
|
|
|
1338 void
|
|
|
1339 scrollup(line_count, byfold)
|
|
|
1340 long line_count;
|
|
|
1341 int byfold; /* TRUE: count a closed fold as one line */
|
|
|
1342 {
|
|
|
1343 #if defined(FEAT_FOLDING) || defined(FEAT_DIFF)
|
|
|
1344 linenr_T lnum;
|
|
|
1345
|
|
|
1346 if (
|
|
|
1347 # ifdef FEAT_FOLDING
|
|
|
1348 (byfold && hasAnyFolding(curwin))
|
|
|
1349 # ifdef FEAT_DIFF
|
|
|
1350 ||
|
|
|
1351 # endif
|
|
|
1352 # endif
|
|
|
1353 # ifdef FEAT_DIFF
|
|
|
1354 curwin->w_p_diff
|
|
|
1355 # endif
|
|
|
1356 )
|
|
|
1357 {
|
|
|
1358 /* count each sequence of folded lines as one logical line */
|
|
|
1359 lnum = curwin->w_topline;
|
|
|
1360 while (line_count--)
|
|
|
1361 {
|
|
|
1362 # ifdef FEAT_DIFF
|
|
|
1363 if (curwin->w_topfill > 0)
|
|
|
1364 --curwin->w_topfill;
|
|
|
1365 else
|
|
|
1366 # endif
|
|
|
1367 {
|
|
|
1368 # ifdef FEAT_FOLDING
|
|
|
1369 if (byfold)
|
|
|
1370 (void)hasFolding(lnum, NULL, &lnum);
|
|
|
1371 # endif
|
|
|
1372 if (lnum >= curbuf->b_ml.ml_line_count)
|
|
|
1373 break;
|
|
|
1374 ++lnum;
|
|
|
1375 # ifdef FEAT_DIFF
|
|
|
1376 curwin->w_topfill = diff_check_fill(curwin, lnum);
|
|
|
1377 # endif
|
|
|
1378 }
|
|
|
1379 }
|
|
|
1380 /* approximate w_botline */
|
|
|
1381 curwin->w_botline += lnum - curwin->w_topline;
|
|
|
1382 curwin->w_topline = lnum;
|
|
|
1383 }
|
|
|
1384 else
|
|
|
1385 #endif
|
|
|
1386 {
|
|
|
1387 curwin->w_topline += line_count;
|
|
|
1388 curwin->w_botline += line_count; /* approximate w_botline */
|
|
|
1389 }
|
|
|
1390
|
|
|
1391 if (curwin->w_topline > curbuf->b_ml.ml_line_count)
|
|
|
1392 curwin->w_topline = curbuf->b_ml.ml_line_count;
|
|
|
1393 if (curwin->w_botline > curbuf->b_ml.ml_line_count + 1)
|
|
|
1394 curwin->w_botline = curbuf->b_ml.ml_line_count + 1;
|
|
|
1395
|
|
|
1396 #ifdef FEAT_DIFF
|
|
|
1397 check_topfill(curwin, FALSE);
|
|
|
1398 #endif
|
|
|
1399
|
|
|
1400 #ifdef FEAT_FOLDING
|
|
|
1401 if (hasAnyFolding(curwin))
|
|
|
1402 /* Make sure w_topline is at the first of a sequence of folded lines. */
|
|
|
1403 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
|
1404 #endif
|
|
|
1405
|
|
|
1406 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
|
1407 if (curwin->w_cursor.lnum < curwin->w_topline)
|
|
|
1408 {
|
|
|
1409 curwin->w_cursor.lnum = curwin->w_topline;
|
|
|
1410 curwin->w_valid &=
|
|
|
1411 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW|VALID_VIRTCOL);
|
|
|
1412 coladvance(curwin->w_curswant);
|
|
|
1413 }
|
|
|
1414 }
|
|
|
1415
|
|
|
1416 #ifdef FEAT_DIFF
|
|
|
1417 /*
|
|
|
1418 * Don't end up with too many filler lines in the window.
|
|
|
1419 */
|
|
|
1420 void
|
|
|
1421 check_topfill(wp, down)
|
|
|
1422 win_T *wp;
|
|
|
1423 int down; /* when TRUE scroll down when not enough space */
|
|
|
1424 {
|
|
|
1425 int n;
|
|
|
1426
|
|
|
1427 if (wp->w_topfill > 0)
|
|
|
1428 {
|
|
|
1429 n = plines_win_nofill(wp, wp->w_topline, TRUE);
|
|
|
1430 if (wp->w_topfill + n > wp->w_height)
|
|
|
1431 {
|
|
|
1432 if (down && wp->w_topline > 1)
|
|
|
1433 {
|
|
|
1434 --wp->w_topline;
|
|
|
1435 wp->w_topfill = 0;
|
|
|
1436 }
|
|
|
1437 else
|
|
|
1438 {
|
|
|
1439 wp->w_topfill = wp->w_height - n;
|
|
|
1440 if (wp->w_topfill < 0)
|
|
|
1441 wp->w_topfill = 0;
|
|
|
1442 }
|
|
|
1443 }
|
|
|
1444 }
|
|
|
1445 }
|
|
|
1446
|
|
|
1447 /*
|
|
|
1448 * Use as many filler lines as possible for w_topline. Make sure w_topline
|
|
|
1449 * is still visible.
|
|
|
1450 */
|
|
|
1451 static void
|
|
|
1452 max_topfill()
|
|
|
1453 {
|
|
|
1454 int n;
|
|
|
1455
|
|
|
1456 n = plines_nofill(curwin->w_topline);
|
|
|
1457 if (n >= curwin->w_height)
|
|
|
1458 curwin->w_topfill = 0;
|
|
|
1459 else
|
|
|
1460 {
|
|
|
1461 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline);
|
|
|
1462 if (curwin->w_topfill + n > curwin->w_height)
|
|
|
1463 curwin->w_topfill = curwin->w_height - n;
|
|
|
1464 }
|
|
|
1465 }
|
|
|
1466 #endif
|
|
|
1467
|
|
|
1468 #if defined(FEAT_INS_EXPAND) || defined(PROTO)
|
|
|
1469 /*
|
|
|
1470 * Scroll the screen one line down, but don't do it if it would move the
|
|
|
1471 * cursor off the screen.
|
|
|
1472 */
|
|
|
1473 void
|
|
|
1474 scrolldown_clamp()
|
|
|
1475 {
|
|
|
1476 int end_row;
|
|
|
1477 #ifdef FEAT_DIFF
|
|
|
1478 int can_fill = (curwin->w_topfill
|
|
|
1479 < diff_check_fill(curwin, curwin->w_topline));
|
|
|
1480 #endif
|
|
|
1481
|
|
|
1482 if (curwin->w_topline <= 1
|
|
|
1483 #ifdef FEAT_DIFF
|
|
|
1484 && !can_fill
|
|
|
1485 #endif
|
|
|
1486 )
|
|
|
1487 return;
|
|
|
1488
|
|
|
1489 validate_cursor(); /* w_wrow needs to be valid */
|
|
|
1490
|
|
|
1491 /*
|
|
|
1492 * Compute the row number of the last row of the cursor line
|
|
|
1493 * and make sure it doesn't go off the screen. Make sure the cursor
|
|
|
1494 * doesn't go past 'scrolloff' lines from the screen end.
|
|
|
1495 */
|
|
|
1496 end_row = curwin->w_wrow;
|
|
|
1497 #ifdef FEAT_DIFF
|
|
|
1498 if (can_fill)
|
|
|
1499 ++end_row;
|
|
|
1500 else
|
|
|
1501 end_row += plines_nofill(curwin->w_topline - 1);
|
|
|
1502 #else
|
|
|
1503 end_row += plines(curwin->w_topline - 1);
|
|
|
1504 #endif
|
|
|
1505 if (curwin->w_p_wrap
|
|
|
1506 #ifdef FEAT_VERTSPLIT
|
|
|
1507 && curwin->w_width != 0
|
|
|
1508 #endif
|
|
|
1509 )
|
|
|
1510 {
|
|
|
1511 validate_cheight();
|
|
|
1512 validate_virtcol();
|
|
|
1513 end_row += curwin->w_cline_height - 1 -
|
|
|
1514 curwin->w_virtcol / W_WIDTH(curwin);
|
|
|
1515 }
|
|
|
1516 if (end_row < curwin->w_height - p_so)
|
|
|
1517 {
|
|
|
1518 #ifdef FEAT_DIFF
|
|
|
1519 if (can_fill)
|
|
|
1520 {
|
|
|
1521 ++curwin->w_topfill;
|
|
|
1522 check_topfill(curwin, TRUE);
|
|
|
1523 }
|
|
|
1524 else
|
|
|
1525 {
|
|
|
1526 --curwin->w_topline;
|
|
|
1527 curwin->w_topfill = 0;
|
|
|
1528 }
|
|
|
1529 #else
|
|
|
1530 --curwin->w_topline;
|
|
|
1531 #endif
|
|
|
1532 #ifdef FEAT_FOLDING
|
|
|
1533 hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
|
1534 #endif
|
|
|
1535 --curwin->w_botline; /* approximate w_botline */
|
|
|
1536 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
|
1537 }
|
|
|
1538 }
|
|
|
1539
|
|
|
1540 /*
|
|
|
1541 * Scroll the screen one line up, but don't do it if it would move the cursor
|
|
|
1542 * off the screen.
|
|
|
1543 */
|
|
|
1544 void
|
|
|
1545 scrollup_clamp()
|
|
|
1546 {
|
|
|
1547 int start_row;
|
|
|
1548
|
|
|
1549 if (curwin->w_topline == curbuf->b_ml.ml_line_count
|
|
|
1550 #ifdef FEAT_DIFF
|
|
|
1551 && curwin->w_topfill == 0
|
|
|
1552 #endif
|
|
|
1553 )
|
|
|
1554 return;
|
|
|
1555
|
|
|
1556 validate_cursor(); /* w_wrow needs to be valid */
|
|
|
1557
|
|
|
1558 /*
|
|
|
1559 * Compute the row number of the first row of the cursor line
|
|
|
1560 * and make sure it doesn't go off the screen. Make sure the cursor
|
|
|
1561 * doesn't go before 'scrolloff' lines from the screen start.
|
|
|
1562 */
|
|
|
1563 #ifdef FEAT_DIFF
|
|
|
1564 start_row = curwin->w_wrow - plines_nofill(curwin->w_topline)
|
|
|
1565 - curwin->w_topfill;
|
|
|
1566 #else
|
|
|
1567 start_row = curwin->w_wrow - plines(curwin->w_topline);
|
|
|
1568 #endif
|
|
|
1569 if (curwin->w_p_wrap
|
|
|
1570 #ifdef FEAT_VERTSPLIT
|
|
|
1571 && curwin->w_width != 0
|
|
|
1572 #endif
|
|
|
1573 )
|
|
|
1574 {
|
|
|
1575 validate_virtcol();
|
|
|
1576 start_row -= curwin->w_virtcol / W_WIDTH(curwin);
|
|
|
1577 }
|
|
|
1578 if (start_row >= p_so)
|
|
|
1579 {
|
|
|
1580 #ifdef FEAT_DIFF
|
|
|
1581 if (curwin->w_topfill > 0)
|
|
|
1582 --curwin->w_topfill;
|
|
|
1583 else
|
|
|
1584 #endif
|
|
36
|
1585 {
|
|
|
1586 #ifdef FEAT_FOLDING
|
|
|
1587 (void)hasFolding(curwin->w_topline, NULL, &curwin->w_topline);
|
|
|
1588 #endif
|
|
7
|
1589 ++curwin->w_topline;
|
|
36
|
1590 }
|
|
7
|
1591 ++curwin->w_botline; /* approximate w_botline */
|
|
|
1592 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
|
1593 }
|
|
|
1594 }
|
|
|
1595 #endif /* FEAT_INS_EXPAND */
|
|
|
1596
|
|
|
1597 /*
|
|
|
1598 * Add one line above "lp->lnum". This can be a filler line, a closed fold or
|
|
|
1599 * a (wrapped) text line. Uses and sets "lp->fill".
|
|
|
1600 * Returns the height of the added line in "lp->height".
|
|
|
1601 * Lines above the first one are incredibly high.
|
|
|
1602 */
|
|
|
1603 static void
|
|
|
1604 topline_back(lp)
|
|
|
1605 lineoff_T *lp;
|
|
|
1606 {
|
|
|
1607 #ifdef FEAT_DIFF
|
|
|
1608 if (lp->fill < diff_check_fill(curwin, lp->lnum))
|
|
|
1609 {
|
|
|
1610 /* Add a filler line. */
|
|
|
1611 ++lp->fill;
|
|
|
1612 lp->height = 1;
|
|
|
1613 }
|
|
|
1614 else
|
|
|
1615 #endif
|
|
|
1616 {
|
|
|
1617 --lp->lnum;
|
|
|
1618 #ifdef FEAT_DIFF
|
|
|
1619 lp->fill = 0;
|
|
|
1620 #endif
|
|
|
1621 if (lp->lnum < 1)
|
|
|
1622 lp->height = MAXCOL;
|
|
|
1623 else
|
|
|
1624 #ifdef FEAT_FOLDING
|
|
|
1625 if (hasFolding(lp->lnum, &lp->lnum, NULL))
|
|
|
1626 /* Add a closed fold */
|
|
|
1627 lp->height = 1;
|
|
|
1628 else
|
|
|
1629 #endif
|
|
|
1630 {
|
|
|
1631 #ifdef FEAT_DIFF
|
|
|
1632 lp->height = plines_nofill(lp->lnum);
|
|
|
1633 #else
|
|
|
1634 lp->height = plines(lp->lnum);
|
|
|
1635 #endif
|
|
|
1636 }
|
|
|
1637 }
|
|
|
1638 }
|
|
|
1639
|
|
|
1640 /*
|
|
|
1641 * Add one line below "lp->lnum". This can be a filler line, a closed fold or
|
|
|
1642 * a (wrapped) text line. Uses and sets "lp->fill".
|
|
|
1643 * Returns the height of the added line in "lp->height".
|
|
|
1644 * Lines below the last one are incredibly high.
|
|
|
1645 */
|
|
|
1646 static void
|
|
|
1647 botline_forw(lp)
|
|
|
1648 lineoff_T *lp;
|
|
|
1649 {
|
|
|
1650 #ifdef FEAT_DIFF
|
|
|
1651 if (lp->fill < diff_check_fill(curwin, lp->lnum + 1))
|
|
|
1652 {
|
|
|
1653 /* Add a filler line. */
|
|
|
1654 ++lp->fill;
|
|
|
1655 lp->height = 1;
|
|
|
1656 }
|
|
|
1657 else
|
|
|
1658 #endif
|
|
|
1659 {
|
|
|
1660 ++lp->lnum;
|
|
|
1661 #ifdef FEAT_DIFF
|
|
|
1662 lp->fill = 0;
|
|
|
1663 #endif
|
|
|
1664 if (lp->lnum > curbuf->b_ml.ml_line_count)
|
|
|
1665 lp->height = MAXCOL;
|
|
|
1666 else
|
|
|
1667 #ifdef FEAT_FOLDING
|
|
|
1668 if (hasFolding(lp->lnum, NULL, &lp->lnum))
|
|
|
1669 /* Add a closed fold */
|
|
|
1670 lp->height = 1;
|
|
|
1671 else
|
|
|
1672 #endif
|
|
|
1673 {
|
|
|
1674 #ifdef FEAT_DIFF
|
|
|
1675 lp->height = plines_nofill(lp->lnum);
|
|
|
1676 #else
|
|
|
1677 lp->height = plines(lp->lnum);
|
|
|
1678 #endif
|
|
|
1679 }
|
|
|
1680 }
|
|
|
1681 }
|
|
|
1682
|
|
|
1683 #ifdef FEAT_DIFF
|
|
|
1684 /*
|
|
|
1685 * Switch from including filler lines below lp->lnum to including filler
|
|
|
1686 * lines above loff.lnum + 1. This keeps pointing to the same line.
|
|
|
1687 * When there are no filler lines nothing changes.
|
|
|
1688 */
|
|
|
1689 static void
|
|
|
1690 botline_topline(lp)
|
|
|
1691 lineoff_T *lp;
|
|
|
1692 {
|
|
|
1693 if (lp->fill > 0)
|
|
|
1694 {
|
|
|
1695 ++lp->lnum;
|
|
|
1696 lp->fill = diff_check_fill(curwin, lp->lnum) - lp->fill + 1;
|
|
|
1697 }
|
|
|
1698 }
|
|
|
1699
|
|
|
1700 /*
|
|
|
1701 * Switch from including filler lines above lp->lnum to including filler
|
|
|
1702 * lines below loff.lnum - 1. This keeps pointing to the same line.
|
|
|
1703 * When there are no filler lines nothing changes.
|
|
|
1704 */
|
|
|
1705 static void
|
|
|
1706 topline_botline(lp)
|
|
|
1707 lineoff_T *lp;
|
|
|
1708 {
|
|
|
1709 if (lp->fill > 0)
|
|
|
1710 {
|
|
|
1711 lp->fill = diff_check_fill(curwin, lp->lnum) - lp->fill + 1;
|
|
|
1712 --lp->lnum;
|
|
|
1713 }
|
|
|
1714 }
|
|
|
1715 #endif
|
|
|
1716
|
|
|
1717 /*
|
|
|
1718 * Recompute topline to put the cursor at the top of the window.
|
|
|
1719 * Scroll at least "min_scroll" lines.
|
|
|
1720 * If "always" is TRUE, always set topline (for "zt").
|
|
|
1721 */
|
|
|
1722 void
|
|
|
1723 scroll_cursor_top(min_scroll, always)
|
|
|
1724 int min_scroll;
|
|
|
1725 int always;
|
|
|
1726 {
|
|
|
1727 int scrolled = 0;
|
|
|
1728 int extra = 0;
|
|
|
1729 int used;
|
|
|
1730 int i;
|
|
|
1731 linenr_T top; /* just above displayed lines */
|
|
|
1732 linenr_T bot; /* just below displayed lines */
|
|
|
1733 linenr_T old_topline = curwin->w_topline;
|
|
|
1734 #ifdef FEAT_DIFF
|
|
|
1735 linenr_T old_topfill = curwin->w_topfill;
|
|
|
1736 #endif
|
|
|
1737 linenr_T new_topline;
|
|
|
1738 int off = p_so;
|
|
|
1739
|
|
|
1740 #ifdef FEAT_MOUSE
|
|
|
1741 if (mouse_dragging > 0)
|
|
|
1742 off = mouse_dragging - 1;
|
|
|
1743 #endif
|
|
|
1744
|
|
|
1745 /*
|
|
|
1746 * Decrease topline until:
|
|
|
1747 * - it has become 1
|
|
|
1748 * - (part of) the cursor line is moved off the screen or
|
|
|
1749 * - moved at least 'scrolljump' lines and
|
|
|
1750 * - at least 'scrolloff' lines above and below the cursor
|
|
|
1751 */
|
|
|
1752 validate_cheight();
|
|
|
1753 used = curwin->w_cline_height;
|
|
|
1754 if (curwin->w_cursor.lnum < curwin->w_topline)
|
|
|
1755 scrolled = used;
|
|
|
1756
|
|
|
1757 #ifdef FEAT_FOLDING
|
|
|
1758 if (hasFolding(curwin->w_cursor.lnum, &top, &bot))
|
|
|
1759 {
|
|
|
1760 --top;
|
|
|
1761 ++bot;
|
|
|
1762 }
|
|
|
1763 else
|
|
|
1764 #endif
|
|
|
1765 {
|
|
|
1766 top = curwin->w_cursor.lnum - 1;
|
|
|
1767 bot = curwin->w_cursor.lnum + 1;
|
|
|
1768 }
|
|
|
1769 new_topline = top + 1;
|
|
|
1770
|
|
|
1771 #ifdef FEAT_DIFF
|
|
|
1772 /* count filler lines of the cursor window as context */
|
|
|
1773 i = diff_check_fill(curwin, curwin->w_cursor.lnum);
|
|
|
1774 used += i;
|
|
|
1775 extra += i;
|
|
|
1776 #endif
|
|
|
1777
|
|
|
1778 /*
|
|
|
1779 * Check if the lines from "top" to "bot" fit in the window. If they do,
|
|
|
1780 * set new_topline and advance "top" and "bot" to include more lines.
|
|
|
1781 */
|
|
|
1782 while (top > 0)
|
|
|
1783 {
|
|
|
1784 #ifdef FEAT_FOLDING
|
|
|
1785 if (hasFolding(top, &top, NULL))
|
|
|
1786 /* count one logical line for a sequence of folded lines */
|
|
|
1787 i = 1;
|
|
|
1788 else
|
|
|
1789 #endif
|
|
|
1790 i = plines(top);
|
|
|
1791 used += i;
|
|
|
1792 if (extra + i <= off && bot < curbuf->b_ml.ml_line_count)
|
|
|
1793 {
|
|
|
1794 #ifdef FEAT_FOLDING
|
|
|
1795 if (hasFolding(bot, NULL, &bot))
|
|
|
1796 /* count one logical line for a sequence of folded lines */
|
|
|
1797 ++used;
|
|
|
1798 else
|
|
|
1799 #endif
|
|
|
1800 used += plines(bot);
|
|
|
1801 }
|
|
|
1802 if (used > curwin->w_height)
|
|
|
1803 break;
|
|
|
1804 if (top < curwin->w_topline)
|
|
|
1805 scrolled += i;
|
|
|
1806
|
|
|
1807 /*
|
|
|
1808 * If scrolling is needed, scroll at least 'sj' lines.
|
|
|
1809 */
|
|
|
1810 if ((new_topline >= curwin->w_topline || scrolled > min_scroll)
|
|
|
1811 && extra >= off)
|
|
|
1812 break;
|
|
|
1813
|
|
|
1814 extra += i;
|
|
|
1815 new_topline = top;
|
|
|
1816 --top;
|
|
|
1817 ++bot;
|
|
|
1818 }
|
|
|
1819
|
|
|
1820 /*
|
|
|
1821 * If we don't have enough space, put cursor in the middle.
|
|
|
1822 * This makes sure we get the same position when using "k" and "j"
|
|
|
1823 * in a small window.
|
|
|
1824 */
|
|
|
1825 if (used > curwin->w_height)
|
|
|
1826 scroll_cursor_halfway(FALSE);
|
|
|
1827 else
|
|
|
1828 {
|
|
|
1829 /*
|
|
|
1830 * If "always" is FALSE, only adjust topline to a lower value, higher
|
|
|
1831 * value may happen with wrapping lines
|
|
|
1832 */
|
|
|
1833 if (new_topline < curwin->w_topline || always)
|
|
|
1834 curwin->w_topline = new_topline;
|
|
|
1835 if (curwin->w_topline > curwin->w_cursor.lnum)
|
|
|
1836 curwin->w_topline = curwin->w_cursor.lnum;
|
|
|
1837 #ifdef FEAT_DIFF
|
|
|
1838 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline);
|
|
|
1839 if (curwin->w_topfill > 0 && extra > off)
|
|
|
1840 {
|
|
|
1841 curwin->w_topfill -= extra - off;
|
|
|
1842 if (curwin->w_topfill < 0)
|
|
|
1843 curwin->w_topfill = 0;
|
|
|
1844 }
|
|
|
1845 check_topfill(curwin, FALSE);
|
|
|
1846 #endif
|
|
|
1847 if (curwin->w_topline != old_topline
|
|
|
1848 #ifdef FEAT_DIFF
|
|
|
1849 || curwin->w_topfill != old_topfill
|
|
|
1850 #endif
|
|
|
1851 )
|
|
|
1852 curwin->w_valid &=
|
|
|
1853 ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
|
1854 curwin->w_valid |= VALID_TOPLINE;
|
|
|
1855 }
|
|
|
1856 }
|
|
|
1857
|
|
|
1858 /*
|
|
|
1859 * Set w_empty_rows and w_filler_rows for window "wp", having used up "used"
|
|
|
1860 * screen lines for text lines.
|
|
|
1861 */
|
|
|
1862 void
|
|
|
1863 set_empty_rows(wp, used)
|
|
|
1864 win_T *wp;
|
|
|
1865 int used;
|
|
|
1866 {
|
|
|
1867 #ifdef FEAT_DIFF
|
|
|
1868 wp->w_filler_rows = 0;
|
|
|
1869 #endif
|
|
|
1870 if (used == 0)
|
|
|
1871 wp->w_empty_rows = 0; /* single line that doesn't fit */
|
|
|
1872 else
|
|
|
1873 {
|
|
|
1874 wp->w_empty_rows = wp->w_height - used;
|
|
|
1875 #ifdef FEAT_DIFF
|
|
|
1876 if (wp->w_botline <= wp->w_buffer->b_ml.ml_line_count)
|
|
|
1877 {
|
|
|
1878 wp->w_filler_rows = diff_check_fill(wp, wp->w_botline);
|
|
|
1879 if (wp->w_empty_rows > wp->w_filler_rows)
|
|
|
1880 wp->w_empty_rows -= wp->w_filler_rows;
|
|
|
1881 else
|
|
|
1882 {
|
|
|
1883 wp->w_filler_rows = wp->w_empty_rows;
|
|
|
1884 wp->w_empty_rows = 0;
|
|
|
1885 }
|
|
|
1886 }
|
|
|
1887 #endif
|
|
|
1888 }
|
|
|
1889 }
|
|
|
1890
|
|
|
1891 /*
|
|
|
1892 * Recompute topline to put the cursor at the bottom of the window.
|
|
|
1893 * Scroll at least "min_scroll" lines.
|
|
|
1894 * If "set_topbot" is TRUE, set topline and botline first (for "zb").
|
|
|
1895 * This is messy stuff!!!
|
|
|
1896 */
|
|
|
1897 void
|
|
|
1898 scroll_cursor_bot(min_scroll, set_topbot)
|
|
|
1899 int min_scroll;
|
|
|
1900 int set_topbot;
|
|
|
1901 {
|
|
|
1902 int used;
|
|
|
1903 int scrolled = 0;
|
|
|
1904 int extra = 0;
|
|
|
1905 int i;
|
|
|
1906 linenr_T line_count;
|
|
|
1907 linenr_T old_topline = curwin->w_topline;
|
|
|
1908 lineoff_T loff;
|
|
|
1909 lineoff_T boff;
|
|
|
1910 #ifdef FEAT_DIFF
|
|
|
1911 int old_topfill = curwin->w_topfill;
|
|
|
1912 int fill_below_window;
|
|
|
1913 #endif
|
|
|
1914 linenr_T old_botline = curwin->w_botline;
|
|
|
1915 linenr_T old_valid = curwin->w_valid;
|
|
|
1916 int old_empty_rows = curwin->w_empty_rows;
|
|
|
1917 linenr_T cln; /* Cursor Line Number */
|
|
|
1918
|
|
|
1919 cln = curwin->w_cursor.lnum;
|
|
|
1920 if (set_topbot)
|
|
|
1921 {
|
|
|
1922 used = 0;
|
|
|
1923 curwin->w_botline = cln + 1;
|
|
|
1924 #ifdef FEAT_DIFF
|
|
|
1925 loff.fill = 0;
|
|
|
1926 #endif
|
|
|
1927 for (curwin->w_topline = curwin->w_botline;
|
|
|
1928 curwin->w_topline > 1;
|
|
|
1929 curwin->w_topline = loff.lnum)
|
|
|
1930 {
|
|
|
1931 loff.lnum = curwin->w_topline;
|
|
|
1932 topline_back(&loff);
|
|
|
1933 if (used + loff.height > curwin->w_height)
|
|
|
1934 break;
|
|
|
1935 used += loff.height;
|
|
|
1936 #ifdef FEAT_DIFF
|
|
|
1937 curwin->w_topfill = loff.fill;
|
|
|
1938 #endif
|
|
|
1939 }
|
|
|
1940 set_empty_rows(curwin, used);
|
|
|
1941 curwin->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP;
|
|
|
1942 if (curwin->w_topline != old_topline
|
|
|
1943 #ifdef FEAT_DIFF
|
|
|
1944 || curwin->w_topfill != old_topfill
|
|
|
1945 #endif
|
|
|
1946 )
|
|
|
1947 curwin->w_valid &= ~(VALID_WROW|VALID_CROW);
|
|
|
1948 }
|
|
|
1949 else
|
|
|
1950 validate_botline();
|
|
|
1951
|
|
|
1952 /* The lines of the cursor line itself are always used. */
|
|
|
1953 #ifdef FEAT_DIFF
|
|
|
1954 used = plines_nofill(cln);
|
|
|
1955 #else
|
|
|
1956 validate_cheight();
|
|
|
1957 used = curwin->w_cline_height;
|
|
|
1958 #endif
|
|
|
1959
|
|
|
1960 /* If the cursor is below botline, we will at least scroll by the height
|
|
|
1961 * of the cursor line. Correct for empty lines, which are really part of
|
|
|
1962 * botline. */
|
|
|
1963 if (cln >= curwin->w_botline)
|
|
|
1964 {
|
|
|
1965 scrolled = used;
|
|
|
1966 if (cln == curwin->w_botline)
|
|
|
1967 scrolled -= curwin->w_empty_rows;
|
|
|
1968 }
|
|
|
1969
|
|
|
1970 /*
|
|
|
1971 * Stop counting lines to scroll when
|
|
|
1972 * - hitting start of the file
|
|
|
1973 * - scrolled nothing or at least 'sj' lines
|
|
|
1974 * - at least 'so' lines below the cursor
|
|
|
1975 * - lines between botline and cursor have been counted
|
|
|
1976 */
|
|
|
1977 #ifdef FEAT_FOLDING
|
|
|
1978 if (!hasFolding(curwin->w_cursor.lnum, &loff.lnum, &boff.lnum))
|
|
|
1979 #endif
|
|
|
1980 {
|
|
|
1981 loff.lnum = cln;
|
|
|
1982 boff.lnum = cln;
|
|
|
1983 }
|
|
|
1984 #ifdef FEAT_DIFF
|
|
|
1985 loff.fill = 0;
|
|
|
1986 boff.fill = 0;
|
|
|
1987 fill_below_window = diff_check_fill(curwin, curwin->w_botline)
|
|
|
1988 - curwin->w_filler_rows;
|
|
|
1989 #endif
|
|
|
1990
|
|
|
1991 while (loff.lnum > 1)
|
|
|
1992 {
|
|
|
1993 /* Stop when scrolled nothing or at least "min_scroll", found "extra"
|
|
|
1994 * context for 'scrolloff' and counted all lines below the window. */
|
|
|
1995 if ((((scrolled <= 0 || scrolled >= min_scroll)
|
|
|
1996 && extra >= (
|
|
|
1997 #ifdef FEAT_MOUSE
|
|
|
1998 mouse_dragging ? mouse_dragging - 1 :
|
|
|
1999 #endif
|
|
|
2000 p_so))
|
|
|
2001 || boff.lnum + 1 > curbuf->b_ml.ml_line_count)
|
|
|
2002 && loff.lnum <= curwin->w_botline
|
|
|
2003 #ifdef FEAT_DIFF
|
|
|
2004 && (loff.lnum < curwin->w_botline
|
|
|
2005 || loff.fill >= fill_below_window)
|
|
|
2006 #endif
|
|
|
2007 )
|
|
|
2008 break;
|
|
|
2009
|
|
|
2010 /* Add one line above */
|
|
|
2011 topline_back(&loff);
|
|
|
2012 used += loff.height;
|
|
|
2013 if (used > curwin->w_height)
|
|
|
2014 break;
|
|
|
2015 if (loff.lnum >= curwin->w_botline
|
|
|
2016 #ifdef FEAT_DIFF
|
|
|
2017 && (loff.lnum > curwin->w_botline
|
|
|
2018 || loff.fill <= fill_below_window)
|
|
|
2019 #endif
|
|
|
2020 )
|
|
|
2021 {
|
|
|
2022 /* Count screen lines that are below the window. */
|
|
|
2023 scrolled += loff.height;
|
|
|
2024 if (loff.lnum == curwin->w_botline
|
|
|
2025 #ifdef FEAT_DIFF
|
|
|
2026 && boff.fill == 0
|
|
|
2027 #endif
|
|
|
2028 )
|
|
|
2029 scrolled -= curwin->w_empty_rows;
|
|
|
2030 }
|
|
|
2031
|
|
|
2032 if (boff.lnum < curbuf->b_ml.ml_line_count)
|
|
|
2033 {
|
|
|
2034 /* Add one line below */
|
|
|
2035 botline_forw(&boff);
|
|
|
2036 used += boff.height;
|
|
|
2037 if (used > curwin->w_height)
|
|
|
2038 break;
|
|
|
2039 if (extra < (
|
|
|
2040 #ifdef FEAT_MOUSE
|
|
|
2041 mouse_dragging > 0 ? mouse_dragging - 1 :
|
|
|
2042 #endif
|
|
|
2043 p_so) || scrolled < min_scroll)
|
|
|
2044 {
|
|
|
2045 extra += boff.height;
|
|
|
2046 if (boff.lnum >= curwin->w_botline
|
|
|
2047 #ifdef FEAT_DIFF
|
|
|
2048 || (boff.lnum + 1 == curwin->w_botline
|
|
|
2049 && boff.fill > curwin->w_filler_rows)
|
|
|
2050 #endif
|
|
|
2051 )
|
|
|
2052 {
|
|
|
2053 /* Count screen lines that are below the window. */
|
|
|
2054 scrolled += boff.height;
|
|
|
2055 if (boff.lnum == curwin->w_botline
|
|
|
2056 #ifdef FEAT_DIFF
|
|
|
2057 && boff.fill == 0
|
|
|
2058 #endif
|
|
|
2059 )
|
|
|
2060 scrolled -= curwin->w_empty_rows;
|
|
|
2061 }
|
|
|
2062 }
|
|
|
2063 }
|
|
|
2064 }
|
|
|
2065
|
|
|
2066 /* curwin->w_empty_rows is larger, no need to scroll */
|
|
|
2067 if (scrolled <= 0)
|
|
|
2068 line_count = 0;
|
|
|
2069 /* more than a screenfull, don't scroll but redraw */
|
|
|
2070 else if (used > curwin->w_height)
|
|
|
2071 line_count = used;
|
|
|
2072 /* scroll minimal number of lines */
|
|
|
2073 else
|
|
|
2074 {
|
|
|
2075 line_count = 0;
|
|
|
2076 #ifdef FEAT_DIFF
|
|
|
2077 boff.fill = curwin->w_topfill;
|
|
|
2078 #endif
|
|
|
2079 boff.lnum = curwin->w_topline - 1;
|
|
|
2080 for (i = 0; i < scrolled && boff.lnum < curwin->w_botline; )
|
|
|
2081 {
|
|
|
2082 botline_forw(&boff);
|
|
|
2083 i += boff.height;
|
|
|
2084 ++line_count;
|
|
|
2085 }
|
|
|
2086 if (i < scrolled) /* below curwin->w_botline, don't scroll */
|
|
|
2087 line_count = 9999;
|
|
|
2088 }
|
|
|
2089
|
|
|
2090 /*
|
|
|
2091 * Scroll up if the cursor is off the bottom of the screen a bit.
|
|
|
2092 * Otherwise put it at 1/2 of the screen.
|
|
|
2093 */
|
|
|
2094 if (line_count >= curwin->w_height && line_count > min_scroll)
|
|
|
2095 scroll_cursor_halfway(FALSE);
|
|
|
2096 else
|
|
|
2097 scrollup(line_count, TRUE);
|
|
|
2098
|
|
|
2099 /*
|
|
|
2100 * If topline didn't change we need to restore w_botline and w_empty_rows
|
|
|
2101 * (we changed them).
|
|
|
2102 * If topline did change, update_screen() will set botline.
|
|
|
2103 */
|
|
|
2104 if (curwin->w_topline == old_topline && set_topbot)
|
|
|
2105 {
|
|
|
2106 curwin->w_botline = old_botline;
|
|
|
2107 curwin->w_empty_rows = old_empty_rows;
|
|
|
2108 curwin->w_valid = old_valid;
|
|
|
2109 }
|
|
|
2110 curwin->w_valid |= VALID_TOPLINE;
|
|
|
2111 }
|
|
|
2112
|
|
|
2113 /*
|
|
|
2114 * Recompute topline to put the cursor halfway the window
|
|
|
2115 * If "atend" is TRUE, also put it halfway at the end of the file.
|
|
|
2116 */
|
|
|
2117 void
|
|
|
2118 scroll_cursor_halfway(atend)
|
|
|
2119 int atend;
|
|
|
2120 {
|
|
|
2121 int above = 0;
|
|
|
2122 linenr_T topline;
|
|
|
2123 #ifdef FEAT_DIFF
|
|
|
2124 int topfill = 0;
|
|
|
2125 #endif
|
|
|
2126 int below = 0;
|
|
|
2127 int used;
|
|
|
2128 lineoff_T loff;
|
|
|
2129 lineoff_T boff;
|
|
|
2130
|
|
|
2131 loff.lnum = boff.lnum = curwin->w_cursor.lnum;
|
|
|
2132 #ifdef FEAT_FOLDING
|
|
|
2133 (void)hasFolding(loff.lnum, &loff.lnum, &boff.lnum);
|
|
|
2134 #endif
|
|
|
2135 #ifdef FEAT_DIFF
|
|
|
2136 used = plines_nofill(loff.lnum);
|
|
|
2137 loff.fill = 0;
|
|
|
2138 boff.fill = 0;
|
|
|
2139 #else
|
|
|
2140 used = plines(loff.lnum);
|
|
|
2141 #endif
|
|
|
2142 topline = loff.lnum;
|
|
|
2143 while (topline > 1)
|
|
|
2144 {
|
|
|
2145 if (below <= above) /* add a line below the cursor first */
|
|
|
2146 {
|
|
|
2147 if (boff.lnum < curbuf->b_ml.ml_line_count)
|
|
|
2148 {
|
|
|
2149 botline_forw(&boff);
|
|
|
2150 used += boff.height;
|
|
|
2151 if (used > curwin->w_height)
|
|
|
2152 break;
|
|
|
2153 below += boff.height;
|
|
|
2154 }
|
|
|
2155 else
|
|
|
2156 {
|
|
|
2157 ++below; /* count a "~" line */
|
|
|
2158 if (atend)
|
|
|
2159 ++used;
|
|
|
2160 }
|
|
|
2161 }
|
|
|
2162
|
|
|
2163 if (below > above) /* add a line above the cursor */
|
|
|
2164 {
|
|
|
2165 topline_back(&loff);
|
|
|
2166 used += loff.height;
|
|
|
2167 if (used > curwin->w_height)
|
|
|
2168 break;
|
|
|
2169 above += loff.height;
|
|
|
2170 topline = loff.lnum;
|
|
|
2171 #ifdef FEAT_DIFF
|
|
|
2172 topfill = loff.fill;
|
|
|
2173 #endif
|
|
|
2174 }
|
|
|
2175 }
|
|
|
2176 #ifdef FEAT_FOLDING
|
|
|
2177 if (!hasFolding(topline, &curwin->w_topline, NULL))
|
|
|
2178 #endif
|
|
|
2179 curwin->w_topline = topline;
|
|
|
2180 #ifdef FEAT_DIFF
|
|
|
2181 curwin->w_topfill = topfill;
|
|
|
2182 check_topfill(curwin, FALSE);
|
|
|
2183 #endif
|
|
|
2184 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
|
2185 curwin->w_valid |= VALID_TOPLINE;
|
|
|
2186 }
|
|
|
2187
|
|
|
2188 /*
|
|
|
2189 * Correct the cursor position so that it is in a part of the screen at least
|
|
|
2190 * 'so' lines from the top and bottom, if possible.
|
|
|
2191 * If not possible, put it at the same position as scroll_cursor_halfway().
|
|
|
2192 * When called topline must be valid!
|
|
|
2193 */
|
|
|
2194 void
|
|
|
2195 cursor_correct()
|
|
|
2196 {
|
|
|
2197 int above = 0; /* screen lines above topline */
|
|
|
2198 linenr_T topline;
|
|
|
2199 int below = 0; /* screen lines below botline */
|
|
|
2200 linenr_T botline;
|
|
|
2201 int above_wanted, below_wanted;
|
|
|
2202 linenr_T cln; /* Cursor Line Number */
|
|
|
2203 int max_off;
|
|
|
2204
|
|
|
2205 /*
|
|
|
2206 * How many lines we would like to have above/below the cursor depends on
|
|
|
2207 * whether the first/last line of the file is on screen.
|
|
|
2208 */
|
|
|
2209 above_wanted = p_so;
|
|
|
2210 below_wanted = p_so;
|
|
|
2211 #ifdef FEAT_MOUSE
|
|
|
2212 if (mouse_dragging)
|
|
|
2213 {
|
|
|
2214 above_wanted = mouse_dragging - 1;
|
|
|
2215 below_wanted = mouse_dragging - 1;
|
|
|
2216 }
|
|
|
2217 #endif
|
|
|
2218 if (curwin->w_topline == 1)
|
|
|
2219 {
|
|
|
2220 above_wanted = 0;
|
|
|
2221 max_off = curwin->w_height / 2;
|
|
|
2222 if (below_wanted > max_off)
|
|
|
2223 below_wanted = max_off;
|
|
|
2224 }
|
|
|
2225 validate_botline();
|
|
|
2226 if (curwin->w_botline == curbuf->b_ml.ml_line_count + 1
|
|
|
2227 #ifdef FEAT_MOUSE
|
|
|
2228 && !mouse_dragging
|
|
|
2229 #endif
|
|
|
2230 )
|
|
|
2231 {
|
|
|
2232 below_wanted = 0;
|
|
|
2233 max_off = (curwin->w_height - 1) / 2;
|
|
|
2234 if (above_wanted > max_off)
|
|
|
2235 above_wanted = max_off;
|
|
|
2236 }
|
|
|
2237
|
|
|
2238 /*
|
|
|
2239 * If there are sufficient file-lines above and below the cursor, we can
|
|
|
2240 * return now.
|
|
|
2241 */
|
|
|
2242 cln = curwin->w_cursor.lnum;
|
|
|
2243 if (cln >= curwin->w_topline + above_wanted
|
|
|
2244 && cln < curwin->w_botline - below_wanted
|
|
|
2245 #ifdef FEAT_FOLDING
|
|
|
2246 && !hasAnyFolding(curwin)
|
|
|
2247 #endif
|
|
|
2248 )
|
|
|
2249 return;
|
|
|
2250
|
|
|
2251 /*
|
|
|
2252 * Narrow down the area where the cursor can be put by taking lines from
|
|
|
2253 * the top and the bottom until:
|
|
|
2254 * - the desired context lines are found
|
|
|
2255 * - the lines from the top is past the lines from the bottom
|
|
|
2256 */
|
|
|
2257 topline = curwin->w_topline;
|
|
|
2258 botline = curwin->w_botline - 1;
|
|
|
2259 #ifdef FEAT_DIFF
|
|
|
2260 /* count filler lines as context */
|
|
|
2261 above = curwin->w_topfill;
|
|
|
2262 below = curwin->w_filler_rows;
|
|
|
2263 #endif
|
|
|
2264 while ((above < above_wanted || below < below_wanted) && topline < botline)
|
|
|
2265 {
|
|
|
2266 if (below < below_wanted && (below <= above || above >= above_wanted))
|
|
|
2267 {
|
|
|
2268 #ifdef FEAT_FOLDING
|
|
|
2269 if (hasFolding(botline, &botline, NULL))
|
|
|
2270 ++below;
|
|
|
2271 else
|
|
|
2272 #endif
|
|
|
2273 below += plines(botline);
|
|
|
2274 --botline;
|
|
|
2275 }
|
|
|
2276 if (above < above_wanted && (above < below || below >= below_wanted))
|
|
|
2277 {
|
|
|
2278 #ifdef FEAT_FOLDING
|
|
|
2279 if (hasFolding(topline, NULL, &topline))
|
|
|
2280 ++above;
|
|
|
2281 else
|
|
|
2282 #endif
|
|
|
2283 #ifndef FEAT_DIFF
|
|
|
2284 above += plines(topline);
|
|
|
2285 #else
|
|
|
2286 above += plines_nofill(topline);
|
|
|
2287
|
|
|
2288 /* Count filler lines below this line as context. */
|
|
|
2289 if (topline < botline)
|
|
|
2290 above += diff_check_fill(curwin, topline + 1);
|
|
|
2291 #endif
|
|
|
2292 ++topline;
|
|
|
2293 }
|
|
|
2294 }
|
|
|
2295 if (topline == botline || botline == 0)
|
|
|
2296 curwin->w_cursor.lnum = topline;
|
|
|
2297 else if (topline > botline)
|
|
|
2298 curwin->w_cursor.lnum = botline;
|
|
|
2299 else
|
|
|
2300 {
|
|
|
2301 if (cln < topline && curwin->w_topline > 1)
|
|
|
2302 {
|
|
|
2303 curwin->w_cursor.lnum = topline;
|
|
|
2304 curwin->w_valid &=
|
|
|
2305 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW);
|
|
|
2306 }
|
|
|
2307 if (cln > botline && curwin->w_botline <= curbuf->b_ml.ml_line_count)
|
|
|
2308 {
|
|
|
2309 curwin->w_cursor.lnum = botline;
|
|
|
2310 curwin->w_valid &=
|
|
|
2311 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW);
|
|
|
2312 }
|
|
|
2313 }
|
|
|
2314 curwin->w_valid |= VALID_TOPLINE;
|
|
|
2315 }
|
|
|
2316
|
|
|
2317 static void get_scroll_overlap __ARGS((lineoff_T *lp, int dir));
|
|
|
2318
|
|
|
2319 /*
|
|
|
2320 * move screen 'count' pages up or down and update screen
|
|
|
2321 *
|
|
|
2322 * return FAIL for failure, OK otherwise
|
|
|
2323 */
|
|
|
2324 int
|
|
|
2325 onepage(dir, count)
|
|
|
2326 int dir;
|
|
|
2327 long count;
|
|
|
2328 {
|
|
|
2329 long n;
|
|
|
2330 int retval = OK;
|
|
|
2331 lineoff_T loff;
|
|
|
2332 linenr_T old_topline = curwin->w_topline;
|
|
|
2333
|
|
|
2334 if (curbuf->b_ml.ml_line_count == 1) /* nothing to do */
|
|
|
2335 {
|
|
|
2336 beep_flush();
|
|
|
2337 return FAIL;
|
|
|
2338 }
|
|
|
2339
|
|
|
2340 for ( ; count > 0; --count)
|
|
|
2341 {
|
|
|
2342 validate_botline();
|
|
|
2343 /*
|
|
|
2344 * It's an error to move a page up when the first line is already on
|
|
|
2345 * the screen. It's an error to move a page down when the last line
|
|
|
2346 * is on the screen and the topline is 'scrolloff' lines from the
|
|
|
2347 * last line.
|
|
|
2348 */
|
|
|
2349 if (dir == FORWARD
|
|
|
2350 ? ((curwin->w_topline >= curbuf->b_ml.ml_line_count - p_so)
|
|
|
2351 && curwin->w_botline > curbuf->b_ml.ml_line_count)
|
|
|
2352 : (curwin->w_topline == 1
|
|
|
2353 #ifdef FEAT_DIFF
|
|
|
2354 && curwin->w_topfill ==
|
|
|
2355 diff_check_fill(curwin, curwin->w_topline)
|
|
|
2356 #endif
|
|
|
2357 ))
|
|
|
2358 {
|
|
|
2359 beep_flush();
|
|
|
2360 retval = FAIL;
|
|
|
2361 break;
|
|
|
2362 }
|
|
|
2363
|
|
|
2364 #ifdef FEAT_DIFF
|
|
|
2365 loff.fill = 0;
|
|
|
2366 #endif
|
|
|
2367 if (dir == FORWARD)
|
|
|
2368 {
|
|
164
|
2369 if (firstwin == lastwin && p_window > 0 && p_window < Rows - 1)
|
|
7
|
2370 {
|
|
164
|
2371 /* Vi compatible scrolling */
|
|
|
2372 if (p_window <= 2)
|
|
|
2373 ++curwin->w_topline;
|
|
|
2374 else
|
|
|
2375 curwin->w_topline += p_window - 2;
|
|
|
2376 if (curwin->w_topline > curbuf->b_ml.ml_line_count)
|
|
|
2377 curwin->w_topline = curbuf->b_ml.ml_line_count;
|
|
|
2378 curwin->w_cursor.lnum = curwin->w_topline;
|
|
|
2379 }
|
|
|
2380 else if (curwin->w_botline > curbuf->b_ml.ml_line_count)
|
|
|
2381 {
|
|
|
2382 /* at end of file */
|
|
7
|
2383 curwin->w_topline = curbuf->b_ml.ml_line_count;
|
|
|
2384 #ifdef FEAT_DIFF
|
|
|
2385 curwin->w_topfill = 0;
|
|
|
2386 #endif
|
|
|
2387 curwin->w_valid &= ~(VALID_WROW|VALID_CROW);
|
|
|
2388 }
|
|
|
2389 else
|
|
|
2390 {
|
|
|
2391 /* For the overlap, start with the line just below the window
|
|
|
2392 * and go upwards. */
|
|
|
2393 loff.lnum = curwin->w_botline;
|
|
|
2394 #ifdef FEAT_DIFF
|
|
|
2395 loff.fill = diff_check_fill(curwin, loff.lnum)
|
|
|
2396 - curwin->w_filler_rows;
|
|
|
2397 #endif
|
|
|
2398 get_scroll_overlap(&loff, -1);
|
|
|
2399 curwin->w_topline = loff.lnum;
|
|
|
2400 #ifdef FEAT_DIFF
|
|
|
2401 curwin->w_topfill = loff.fill;
|
|
|
2402 check_topfill(curwin, FALSE);
|
|
|
2403 #endif
|
|
|
2404 curwin->w_cursor.lnum = curwin->w_topline;
|
|
|
2405 curwin->w_valid &= ~(VALID_WCOL|VALID_CHEIGHT|VALID_WROW|
|
|
|
2406 VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
|
2407 }
|
|
|
2408 }
|
|
|
2409 else /* dir == BACKWARDS */
|
|
|
2410 {
|
|
|
2411 #ifdef FEAT_DIFF
|
|
|
2412 if (curwin->w_topline == 1)
|
|
|
2413 {
|
|
|
2414 /* Include max number of filler lines */
|
|
|
2415 max_topfill();
|
|
|
2416 continue;
|
|
|
2417 }
|
|
|
2418 #endif
|
|
164
|
2419 if (firstwin == lastwin && p_window > 0 && p_window < Rows - 1)
|
|
|
2420 {
|
|
|
2421 /* Vi compatible scrolling (sort of) */
|
|
|
2422 if (p_window <= 2)
|
|
|
2423 --curwin->w_topline;
|
|
|
2424 else
|
|
|
2425 curwin->w_topline -= p_window - 2;
|
|
|
2426 if (curwin->w_topline < 1)
|
|
|
2427 curwin->w_topline = 1;
|
|
|
2428 curwin->w_cursor.lnum = curwin->w_topline + p_window - 1;
|
|
|
2429 if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
|
|
|
2430 curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
|
|
|
2431 continue;
|
|
|
2432 }
|
|
|
2433
|
|
7
|
2434 /* Find the line at the top of the window that is going to be the
|
|
|
2435 * line at the bottom of the window. Make sure this results in
|
|
|
2436 * the same line as before doing CTRL-F. */
|
|
|
2437 loff.lnum = curwin->w_topline - 1;
|
|
|
2438 #ifdef FEAT_DIFF
|
|
|
2439 loff.fill = diff_check_fill(curwin, loff.lnum + 1)
|
|
|
2440 - curwin->w_topfill;
|
|
|
2441 #endif
|
|
|
2442 get_scroll_overlap(&loff, 1);
|
|
|
2443
|
|
|
2444 if (loff.lnum >= curbuf->b_ml.ml_line_count)
|
|
|
2445 {
|
|
|
2446 loff.lnum = curbuf->b_ml.ml_line_count;
|
|
|
2447 #ifdef FEAT_DIFF
|
|
|
2448 loff.fill = 0;
|
|
|
2449 }
|
|
|
2450 else
|
|
|
2451 {
|
|
|
2452 botline_topline(&loff);
|
|
|
2453 #endif
|
|
|
2454 }
|
|
|
2455 curwin->w_cursor.lnum = loff.lnum;
|
|
|
2456
|
|
|
2457 /* Find the line just above the new topline to get the right line
|
|
|
2458 * at the bottom of the window. */
|
|
|
2459 n = 0;
|
|
|
2460 while (n <= curwin->w_height && loff.lnum >= 1)
|
|
|
2461 {
|
|
|
2462 topline_back(&loff);
|
|
|
2463 n += loff.height;
|
|
|
2464 }
|
|
|
2465 if (n <= curwin->w_height) /* at begin of file */
|
|
|
2466 {
|
|
|
2467 curwin->w_topline = 1;
|
|
|
2468 #ifdef FEAT_DIFF
|
|
|
2469 max_topfill();
|
|
|
2470 #endif
|
|
|
2471 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
|
2472 }
|
|
|
2473 else
|
|
|
2474 {
|
|
|
2475 /* Go two lines forward again. */
|
|
|
2476 #ifdef FEAT_DIFF
|
|
|
2477 topline_botline(&loff);
|
|
|
2478 #endif
|
|
|
2479 botline_forw(&loff);
|
|
|
2480 botline_forw(&loff);
|
|
|
2481 #ifdef FEAT_DIFF
|
|
|
2482 botline_topline(&loff);
|
|
|
2483 #endif
|
|
|
2484 #ifdef FEAT_FOLDING
|
|
|
2485 /* We're at the wrong end of a fold now. */
|
|
|
2486 (void)hasFolding(loff.lnum, &loff.lnum, NULL);
|
|
|
2487 #endif
|
|
|
2488
|
|
|
2489 /* Always scroll at least one line. Avoid getting stuck on
|
|
|
2490 * very long lines. */
|
|
|
2491 if (loff.lnum >= curwin->w_topline
|
|
|
2492 #ifdef FEAT_DIFF
|
|
|
2493 && (loff.lnum > curwin->w_topline
|
|
|
2494 || loff.fill >= curwin->w_topfill)
|
|
|
2495 #endif
|
|
|
2496 )
|
|
|
2497 {
|
|
|
2498 #ifdef FEAT_DIFF
|
|
|
2499 /* First try using the maximum number of filler lines. If
|
|
|
2500 * that's not enough, backup one line. */
|
|
|
2501 loff.fill = curwin->w_topfill;
|
|
|
2502 if (curwin->w_topfill < diff_check_fill(curwin,
|
|
|
2503 curwin->w_topline))
|
|
|
2504 max_topfill();
|
|
|
2505 if (curwin->w_topfill == loff.fill)
|
|
|
2506 #endif
|
|
|
2507 {
|
|
|
2508 --curwin->w_topline;
|
|
|
2509 #ifdef FEAT_DIFF
|
|
|
2510 curwin->w_topfill = 0;
|
|
|
2511 #endif
|
|
|
2512 }
|
|
|
2513 comp_botline(curwin);
|
|
|
2514 curwin->w_cursor.lnum = curwin->w_botline - 1;
|
|
|
2515 curwin->w_valid &= ~(VALID_WCOL|VALID_CHEIGHT|
|
|
|
2516 VALID_WROW|VALID_CROW);
|
|
|
2517 }
|
|
|
2518 else
|
|
|
2519 {
|
|
|
2520 curwin->w_topline = loff.lnum;
|
|
|
2521 #ifdef FEAT_DIFF
|
|
|
2522 curwin->w_topfill = loff.fill;
|
|
|
2523 check_topfill(curwin, FALSE);
|
|
|
2524 #endif
|
|
|
2525 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
|
2526 }
|
|
|
2527 }
|
|
|
2528 }
|
|
|
2529 }
|
|
|
2530 #ifdef FEAT_FOLDING
|
|
|
2531 foldAdjustCursor();
|
|
|
2532 #endif
|
|
|
2533 cursor_correct();
|
|
161
|
2534 if (retval == OK)
|
|
|
2535 beginline(BL_SOL | BL_FIX);
|
|
7
|
2536 curwin->w_valid &= ~(VALID_WCOL|VALID_WROW|VALID_VIRTCOL);
|
|
|
2537
|
|
|
2538 /*
|
|
|
2539 * Avoid the screen jumping up and down when 'scrolloff' is non-zero.
|
|
|
2540 * But make sure we scroll at least one line (happens with mix of long
|
|
|
2541 * wrapping lines and non-wrapping line).
|
|
|
2542 */
|
|
|
2543 if (retval == OK && dir == FORWARD && check_top_offset())
|
|
|
2544 {
|
|
|
2545 scroll_cursor_top(1, FALSE);
|
|
|
2546 if (curwin->w_topline <= old_topline
|
|
|
2547 && old_topline < curbuf->b_ml.ml_line_count)
|
|
|
2548 {
|
|
|
2549 curwin->w_topline = old_topline + 1;
|
|
|
2550 #ifdef FEAT_FOLDING
|
|
|
2551 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
|
2552 #endif
|
|
|
2553 }
|
|
|
2554 }
|
|
|
2555
|
|
|
2556 redraw_later(VALID);
|
|
|
2557 return retval;
|
|
|
2558 }
|
|
|
2559
|
|
|
2560 /*
|
|
|
2561 * Decide how much overlap to use for page-up or page-down scrolling.
|
|
|
2562 * This is symmetric, so that doing both keeps the same lines displayed.
|
|
|
2563 * Three lines are examined:
|
|
|
2564 *
|
|
|
2565 * before CTRL-F after CTRL-F / before CTRL-B
|
|
|
2566 * etc. l1
|
|
|
2567 * l1 last but one line ------------
|
|
|
2568 * l2 last text line l2 top text line
|
|
|
2569 * ------------- l3 second text line
|
|
|
2570 * l3 etc.
|
|
|
2571 */
|
|
|
2572 static void
|
|
|
2573 get_scroll_overlap(lp, dir)
|
|
|
2574 lineoff_T *lp;
|
|
|
2575 int dir;
|
|
|
2576 {
|
|
|
2577 int h1, h2, h3, h4;
|
|
|
2578 int min_height = curwin->w_height - 2;
|
|
|
2579 lineoff_T loff0, loff1, loff2;
|
|
|
2580
|
|
|
2581 #ifdef FEAT_DIFF
|
|
|
2582 if (lp->fill > 0)
|
|
|
2583 lp->height = 1;
|
|
|
2584 else
|
|
|
2585 lp->height = plines_nofill(lp->lnum);
|
|
|
2586 #else
|
|
|
2587 lp->height = plines(lp->lnum);
|
|
|
2588 #endif
|
|
|
2589 h1 = lp->height;
|
|
|
2590 if (h1 > min_height)
|
|
|
2591 return; /* no overlap */
|
|
|
2592
|
|
|
2593 loff0 = *lp;
|
|
|
2594 if (dir > 0)
|
|
|
2595 botline_forw(lp);
|
|
|
2596 else
|
|
|
2597 topline_back(lp);
|
|
|
2598 h2 = lp->height;
|
|
|
2599 if (h2 + h1 > min_height)
|
|
|
2600 {
|
|
|
2601 *lp = loff0; /* no overlap */
|
|
|
2602 return;
|
|
|
2603 }
|
|
|
2604
|
|
|
2605 loff1 = *lp;
|
|
|
2606 if (dir > 0)
|
|
|
2607 botline_forw(lp);
|
|
|
2608 else
|
|
|
2609 topline_back(lp);
|
|
|
2610 h3 = lp->height;
|
|
|
2611 if (h3 + h2 > min_height)
|
|
|
2612 {
|
|
|
2613 *lp = loff0; /* no overlap */
|
|
|
2614 return;
|
|
|
2615 }
|
|
|
2616
|
|
|
2617 loff2 = *lp;
|
|
|
2618 if (dir > 0)
|
|
|
2619 botline_forw(lp);
|
|
|
2620 else
|
|
|
2621 topline_back(lp);
|
|
|
2622 h4 = lp->height;
|
|
|
2623 if (h4 + h3 + h2 > min_height || h3 + h2 + h1 > min_height)
|
|
|
2624 *lp = loff1; /* 1 line overlap */
|
|
|
2625 else
|
|
|
2626 *lp = loff2; /* 2 lines overlap */
|
|
|
2627 return;
|
|
|
2628 }
|
|
|
2629
|
|
|
2630 /* #define KEEP_SCREEN_LINE */
|
|
|
2631 /*
|
|
|
2632 * Scroll 'scroll' lines up or down.
|
|
|
2633 */
|
|
|
2634 void
|
|
|
2635 halfpage(flag, Prenum)
|
|
|
2636 int flag;
|
|
|
2637 linenr_T Prenum;
|
|
|
2638 {
|
|
|
2639 long scrolled = 0;
|
|
|
2640 int i;
|
|
|
2641 int n;
|
|
|
2642 int room;
|
|
|
2643
|
|
|
2644 if (Prenum)
|
|
|
2645 curwin->w_p_scr = (Prenum > curwin->w_height) ?
|
|
|
2646 curwin->w_height : Prenum;
|
|
|
2647 n = (curwin->w_p_scr <= curwin->w_height) ?
|
|
|
2648 curwin->w_p_scr : curwin->w_height;
|
|
|
2649
|
|
|
2650 validate_botline();
|
|
|
2651 room = curwin->w_empty_rows;
|
|
|
2652 #ifdef FEAT_DIFF
|
|
|
2653 room += curwin->w_filler_rows;
|
|
|
2654 #endif
|
|
|
2655 if (flag)
|
|
|
2656 {
|
|
|
2657 /*
|
|
|
2658 * scroll the text up
|
|
|
2659 */
|
|
|
2660 while (n > 0 && curwin->w_botline <= curbuf->b_ml.ml_line_count)
|
|
|
2661 {
|
|
|
2662 #ifdef FEAT_DIFF
|
|
|
2663 if (curwin->w_topfill > 0)
|
|
|
2664 {
|
|
|
2665 i = 1;
|
|
|
2666 if (--n < 0 && scrolled > 0)
|
|
|
2667 break;
|
|
|
2668 --curwin->w_topfill;
|
|
|
2669 }
|
|
|
2670 else
|
|
|
2671 #endif
|
|
|
2672 {
|
|
|
2673 #ifdef FEAT_DIFF
|
|
|
2674 i = plines_nofill(curwin->w_topline);
|
|
|
2675 #else
|
|
|
2676 i = plines(curwin->w_topline);
|
|
|
2677 #endif
|
|
|
2678 n -= i;
|
|
|
2679 if (n < 0 && scrolled > 0)
|
|
|
2680 break;
|
|
|
2681 #ifdef FEAT_FOLDING
|
|
|
2682 (void)hasFolding(curwin->w_topline, NULL, &curwin->w_topline);
|
|
|
2683 #endif
|
|
|
2684 ++curwin->w_topline;
|
|
|
2685 #ifdef FEAT_DIFF
|
|
|
2686 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline);
|
|
|
2687 #endif
|
|
|
2688
|
|
|
2689 #ifndef KEEP_SCREEN_LINE
|
|
|
2690 if (curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)
|
|
|
2691 {
|
|
|
2692 ++curwin->w_cursor.lnum;
|
|
|
2693 curwin->w_valid &=
|
|
|
2694 ~(VALID_VIRTCOL|VALID_CHEIGHT|VALID_WCOL);
|
|
|
2695 }
|
|
|
2696 #endif
|
|
|
2697 }
|
|
|
2698 curwin->w_valid &= ~(VALID_CROW|VALID_WROW);
|
|
|
2699 scrolled += i;
|
|
|
2700
|
|
|
2701 /*
|
|
|
2702 * Correct w_botline for changed w_topline.
|
|
|
2703 * Won't work when there are filler lines.
|
|
|
2704 */
|
|
|
2705 #ifdef FEAT_DIFF
|
|
|
2706 if (curwin->w_p_diff)
|
|
|
2707 curwin->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
|
2708 else
|
|
|
2709 #endif
|
|
|
2710 {
|
|
|
2711 room += i;
|
|
|
2712 do
|
|
|
2713 {
|
|
|
2714 i = plines(curwin->w_botline);
|
|
|
2715 if (i > room)
|
|
|
2716 break;
|
|
|
2717 #ifdef FEAT_FOLDING
|
|
|
2718 (void)hasFolding(curwin->w_botline, NULL,
|
|
|
2719 &curwin->w_botline);
|
|
|
2720 #endif
|
|
|
2721 ++curwin->w_botline;
|
|
|
2722 room -= i;
|
|
|
2723 } while (curwin->w_botline <= curbuf->b_ml.ml_line_count);
|
|
|
2724 }
|
|
|
2725 }
|
|
|
2726
|
|
|
2727 #ifndef KEEP_SCREEN_LINE
|
|
|
2728 /*
|
|
|
2729 * When hit bottom of the file: move cursor down.
|
|
|
2730 */
|
|
|
2731 if (n > 0)
|
|
|
2732 {
|
|
|
2733 # ifdef FEAT_FOLDING
|
|
|
2734 if (hasAnyFolding(curwin))
|
|
|
2735 {
|
|
|
2736 while (--n >= 0
|
|
|
2737 && curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)
|
|
|
2738 {
|
|
|
2739 (void)hasFolding(curwin->w_cursor.lnum, NULL,
|
|
|
2740 &curwin->w_cursor.lnum);
|
|
|
2741 ++curwin->w_cursor.lnum;
|
|
|
2742 }
|
|
|
2743 }
|
|
|
2744 else
|
|
|
2745 # endif
|
|
|
2746 curwin->w_cursor.lnum += n;
|
|
|
2747 check_cursor_lnum();
|
|
|
2748 }
|
|
|
2749 #else
|
|
|
2750 /* try to put the cursor in the same screen line */
|
|
|
2751 while ((curwin->w_cursor.lnum < curwin->w_topline || scrolled > 0)
|
|
|
2752 && curwin->w_cursor.lnum < curwin->w_botline - 1)
|
|
|
2753 {
|
|
|
2754 scrolled -= plines(curwin->w_cursor.lnum);
|
|
|
2755 if (scrolled < 0 && curwin->w_cursor.lnum >= curwin->w_topline)
|
|
|
2756 break;
|
|
|
2757 # ifdef FEAT_FOLDING
|
|
|
2758 (void)hasFolding(curwin->w_cursor.lnum, NULL,
|
|
|
2759 &curwin->w_cursor.lnum);
|
|
|
2760 # endif
|
|
|
2761 ++curwin->w_cursor.lnum;
|
|
|
2762 }
|
|
|
2763 #endif
|
|
|
2764 }
|
|
|
2765 else
|
|
|
2766 {
|
|
|
2767 /*
|
|
|
2768 * scroll the text down
|
|
|
2769 */
|
|
|
2770 while (n > 0 && curwin->w_topline > 1)
|
|
|
2771 {
|
|
|
2772 #ifdef FEAT_DIFF
|
|
|
2773 if (curwin->w_topfill < diff_check_fill(curwin, curwin->w_topline))
|
|
|
2774 {
|
|
|
2775 i = 1;
|
|
|
2776 if (--n < 0 && scrolled > 0)
|
|
|
2777 break;
|
|
|
2778 ++curwin->w_topfill;
|
|
|
2779 }
|
|
|
2780 else
|
|
|
2781 #endif
|
|
|
2782 {
|
|
|
2783 #ifdef FEAT_DIFF
|
|
|
2784 i = plines_nofill(curwin->w_topline - 1);
|
|
|
2785 #else
|
|
|
2786 i = plines(curwin->w_topline - 1);
|
|
|
2787 #endif
|
|
|
2788 n -= i;
|
|
|
2789 if (n < 0 && scrolled > 0)
|
|
|
2790 break;
|
|
|
2791 --curwin->w_topline;
|
|
|
2792 #ifdef FEAT_FOLDING
|
|
|
2793 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
|
2794 #endif
|
|
|
2795 #ifdef FEAT_DIFF
|
|
|
2796 curwin->w_topfill = 0;
|
|
|
2797 #endif
|
|
|
2798 }
|
|
|
2799 curwin->w_valid &= ~(VALID_CROW|VALID_WROW|
|
|
|
2800 VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
|
2801 scrolled += i;
|
|
|
2802 #ifndef KEEP_SCREEN_LINE
|
|
|
2803 if (curwin->w_cursor.lnum > 1)
|
|
|
2804 {
|
|
|
2805 --curwin->w_cursor.lnum;
|
|
|
2806 curwin->w_valid &= ~(VALID_VIRTCOL|VALID_CHEIGHT|VALID_WCOL);
|
|
|
2807 }
|
|
|
2808 #endif
|
|
|
2809 }
|
|
|
2810 #ifndef KEEP_SCREEN_LINE
|
|
|
2811 /*
|
|
|
2812 * When hit top of the file: move cursor up.
|
|
|
2813 */
|
|
|
2814 if (n > 0)
|
|
|
2815 {
|
|
|
2816 if (curwin->w_cursor.lnum <= (linenr_T)n)
|
|
|
2817 curwin->w_cursor.lnum = 1;
|
|
|
2818 else
|
|
|
2819 # ifdef FEAT_FOLDING
|
|
|
2820 if (hasAnyFolding(curwin))
|
|
|
2821 {
|
|
|
2822 while (--n >= 0 && curwin->w_cursor.lnum > 1)
|
|
|
2823 {
|
|
|
2824 --curwin->w_cursor.lnum;
|
|
|
2825 (void)hasFolding(curwin->w_cursor.lnum,
|
|
|
2826 &curwin->w_cursor.lnum, NULL);
|
|
|
2827 }
|
|
|
2828 }
|
|
|
2829 else
|
|
|
2830 # endif
|
|
|
2831 curwin->w_cursor.lnum -= n;
|
|
|
2832 }
|
|
|
2833 #else
|
|
|
2834 /* try to put the cursor in the same screen line */
|
|
|
2835 scrolled += n; /* move cursor when topline is 1 */
|
|
|
2836 while (curwin->w_cursor.lnum > curwin->w_topline
|
|
|
2837 && (scrolled > 0 || curwin->w_cursor.lnum >= curwin->w_botline))
|
|
|
2838 {
|
|
|
2839 scrolled -= plines(curwin->w_cursor.lnum - 1);
|
|
|
2840 if (scrolled < 0 && curwin->w_cursor.lnum < curwin->w_botline)
|
|
|
2841 break;
|
|
|
2842 --curwin->w_cursor.lnum;
|
|
|
2843 # ifdef FEAT_FOLDING
|
|
|
2844 foldAdjustCursor();
|
|
|
2845 # endif
|
|
|
2846 }
|
|
|
2847 #endif
|
|
|
2848 }
|
|
|
2849 # ifdef FEAT_FOLDING
|
|
|
2850 /* Move cursor to first line of closed fold. */
|
|
|
2851 foldAdjustCursor();
|
|
|
2852 # endif
|
|
|
2853 #ifdef FEAT_DIFF
|
|
|
2854 check_topfill(curwin, !flag);
|
|
|
2855 #endif
|
|
|
2856 cursor_correct();
|
|
|
2857 beginline(BL_SOL | BL_FIX);
|
|
|
2858 redraw_later(VALID);
|
|
|
2859 }
|
