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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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363 if (curwin->w_skipcol)
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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;
|
|
|
844 }
|
|
|
845 }
|
|
|
846
|
|
|
847 /*
|
|
|
848 * Validate curwin->w_cline_height only.
|
|
|
849 */
|
|
|
850 static void
|
|
|
851 validate_cheight()
|
|
|
852 {
|
|
|
853 check_cursor_moved(curwin);
|
|
|
854 if (!(curwin->w_valid & VALID_CHEIGHT))
|
|
|
855 {
|
|
|
856 #ifdef FEAT_DIFF
|
|
|
857 if (curwin->w_cursor.lnum == curwin->w_topline)
|
|
|
858 curwin->w_cline_height = plines_nofill(curwin->w_cursor.lnum)
|
|
|
859 + curwin->w_topfill;
|
|
|
860 else
|
|
|
861 #endif
|
|
|
862 curwin->w_cline_height = plines(curwin->w_cursor.lnum);
|
|
|
863 #ifdef FEAT_FOLDING
|
|
|
864 curwin->w_cline_folded = hasFolding(curwin->w_cursor.lnum, NULL, NULL);
|
|
|
865 #endif
|
|
|
866 curwin->w_valid |= VALID_CHEIGHT;
|
|
|
867 }
|
|
|
868 }
|
|
|
869
|
|
|
870 /*
|
|
|
871 * validate w_wcol and w_virtcol only. Only correct when 'wrap' on!
|
|
|
872 */
|
|
|
873 void
|
|
|
874 validate_cursor_col()
|
|
|
875 {
|
|
|
876 colnr_T off;
|
|
|
877 colnr_T col;
|
|
|
878
|
|
|
879 validate_virtcol();
|
|
|
880 if (!(curwin->w_valid & VALID_WCOL))
|
|
|
881 {
|
|
|
882 col = curwin->w_virtcol;
|
|
|
883 off = curwin_col_off();
|
|
|
884 col += off;
|
|
|
885
|
|
|
886 /* long line wrapping, adjust curwin->w_wrow */
|
|
|
887 if (curwin->w_p_wrap && col >= (colnr_T)W_WIDTH(curwin)
|
|
119
|
888 && W_WIDTH(curwin) - off + curwin_col_off2() > 0)
|
|
7
|
889 {
|
|
|
890 col -= W_WIDTH(curwin);
|
|
|
891 col = col % (W_WIDTH(curwin) - off + curwin_col_off2());
|
|
|
892 }
|
|
|
893 curwin->w_wcol = col;
|
|
|
894 curwin->w_valid |= VALID_WCOL;
|
|
|
895 }
|
|
|
896 }
|
|
|
897
|
|
|
898 /*
|
|
|
899 * Compute offset of a window, occupied by line number, fold column and sign
|
|
|
900 * column (these don't move when scrolling horizontally).
|
|
|
901 */
|
|
|
902 int
|
|
|
903 win_col_off(wp)
|
|
|
904 win_T *wp;
|
|
|
905 {
|
|
13
|
906 return ((wp->w_p_nu ? number_width(wp) + 1 : 0)
|
|
7
|
907 #ifdef FEAT_CMDWIN
|
|
|
908 + (cmdwin_type == 0 || wp != curwin ? 0 : 1)
|
|
|
909 #endif
|
|
|
910 #ifdef FEAT_FOLDING
|
|
|
911 + wp->w_p_fdc
|
|
|
912 #endif
|
|
|
913 #ifdef FEAT_SIGNS
|
|
|
914 + (
|
|
|
915 # ifdef FEAT_NETBEANS_INTG
|
|
|
916 /* always show glyph gutter in netbeans */
|
|
|
917 usingNetbeans ||
|
|
|
918 # endif
|
|
|
919 wp->w_buffer->b_signlist != NULL ? 2 : 0)
|
|
|
920 #endif
|
|
|
921 );
|
|
|
922 }
|
|
|
923
|
|
|
924 int
|
|
|
925 curwin_col_off()
|
|
|
926 {
|
|
|
927 return win_col_off(curwin);
|
|
|
928 }
|
|
|
929
|
|
|
930 /*
|
|
|
931 * Return the difference in column offset for the second screen line of a
|
|
|
932 * wrapped line. It's 8 if 'number' is on and 'n' is in 'cpoptions'.
|
|
|
933 */
|
|
|
934 int
|
|
|
935 win_col_off2(wp)
|
|
|
936 win_T *wp;
|
|
|
937 {
|
|
|
938 if (wp->w_p_nu && vim_strchr(p_cpo, CPO_NUMCOL) != NULL)
|
|
13
|
939 return number_width(wp) + 1;
|
|
7
|
940 return 0;
|
|
|
941 }
|
|
|
942
|
|
|
943 int
|
|
|
944 curwin_col_off2()
|
|
|
945 {
|
|
|
946 return win_col_off2(curwin);
|
|
|
947 }
|
|
|
948
|
|
|
949 /*
|
|
|
950 * compute curwin->w_wcol and curwin->w_virtcol.
|
|
|
951 * Also updates curwin->w_wrow and curwin->w_cline_row.
|
|
|
952 * Also updates curwin->w_leftcol.
|
|
|
953 */
|
|
|
954 void
|
|
|
955 curs_columns(scroll)
|
|
|
956 int scroll; /* when TRUE, may scroll horizontally */
|
|
|
957 {
|
|
|
958 int diff;
|
|
|
959 int extra; /* offset for first screen line */
|
|
|
960 int off_left, off_right;
|
|
|
961 int n;
|
|
|
962 int p_lines;
|
|
|
963 int width = 0;
|
|
|
964 int textwidth;
|
|
|
965 int new_leftcol;
|
|
|
966 colnr_T startcol;
|
|
|
967 colnr_T endcol;
|
|
|
968 colnr_T prev_skipcol;
|
|
|
969
|
|
|
970 /*
|
|
|
971 * First make sure that w_topline is valid (after moving the cursor).
|
|
|
972 */
|
|
|
973 update_topline();
|
|
|
974
|
|
|
975 /*
|
|
|
976 * Next make sure that w_cline_row is valid.
|
|
|
977 */
|
|
|
978 if (!(curwin->w_valid & VALID_CROW))
|
|
|
979 curs_rows(curwin, FALSE);
|
|
|
980
|
|
|
981 /*
|
|
|
982 * Compute the number of virtual columns.
|
|
|
983 */
|
|
|
984 #ifdef FEAT_FOLDING
|
|
|
985 if (curwin->w_cline_folded)
|
|
|
986 /* In a folded line the cursor is always in the first column */
|
|
|
987 startcol = curwin->w_virtcol = endcol = curwin->w_leftcol;
|
|
|
988 else
|
|
|
989 #endif
|
|
|
990 getvvcol(curwin, &curwin->w_cursor,
|
|
|
991 &startcol, &(curwin->w_virtcol), &endcol);
|
|
|
992
|
|
|
993 /* remove '$' from change command when cursor moves onto it */
|
|
|
994 if (startcol > dollar_vcol)
|
|
|
995 dollar_vcol = 0;
|
|
|
996
|
|
|
997 extra = curwin_col_off();
|
|
|
998 curwin->w_wcol = curwin->w_virtcol + extra;
|
|
|
999 endcol += extra;
|
|
|
1000
|
|
|
1001 /*
|
|
|
1002 * Now compute w_wrow, counting screen lines from w_cline_row.
|
|
|
1003 */
|
|
|
1004 curwin->w_wrow = curwin->w_cline_row;
|
|
|
1005
|
|
|
1006 textwidth = W_WIDTH(curwin) - extra;
|
|
|
1007 if (textwidth <= 0)
|
|
|
1008 {
|
|
|
1009 /* No room for text, put cursor in last char of window. */
|
|
|
1010 curwin->w_wcol = W_WIDTH(curwin) - 1;
|
|
|
1011 curwin->w_wrow = curwin->w_height - 1;
|
|
|
1012 }
|
|
|
1013 else if (curwin->w_p_wrap
|
|
|
1014 #ifdef FEAT_VERTSPLIT
|
|
|
1015 && curwin->w_width != 0
|
|
|
1016 #endif
|
|
|
1017 )
|
|
|
1018 {
|
|
|
1019 width = textwidth + curwin_col_off2();
|
|
|
1020
|
|
|
1021 /* long line wrapping, adjust curwin->w_wrow */
|
|
|
1022 if (curwin->w_wcol >= W_WIDTH(curwin))
|
|
|
1023 {
|
|
|
1024 n = (curwin->w_wcol - W_WIDTH(curwin)) / width + 1;
|
|
|
1025 curwin->w_wcol -= n * width;
|
|
|
1026 curwin->w_wrow += n;
|
|
|
1027
|
|
|
1028 #ifdef FEAT_LINEBREAK
|
|
|
1029 /* When cursor wraps to first char of next line in Insert
|
|
|
1030 * mode, the 'showbreak' string isn't shown, backup to first
|
|
|
1031 * column */
|
|
|
1032 if (*p_sbr && *ml_get_cursor() == NUL
|
|
|
1033 && curwin->w_wcol == (int)vim_strsize(p_sbr))
|
|
|
1034 curwin->w_wcol = 0;
|
|
|
1035 #endif
|
|
|
1036 }
|
|
|
1037 }
|
|
|
1038
|
|
|
1039 /* No line wrapping: compute curwin->w_leftcol if scrolling is on and line
|
|
|
1040 * is not folded.
|
|
|
1041 * If scrolling is off, curwin->w_leftcol is assumed to be 0 */
|
|
|
1042 else if (scroll
|
|
|
1043 #ifdef FEAT_FOLDING
|
|
|
1044 && !curwin->w_cline_folded
|
|
|
1045 #endif
|
|
|
1046 )
|
|
|
1047 {
|
|
|
1048 /*
|
|
|
1049 * If Cursor is left of the screen, scroll rightwards.
|
|
|
1050 * If Cursor is right of the screen, scroll leftwards
|
|
|
1051 * If we get closer to the edge than 'sidescrolloff', scroll a little
|
|
|
1052 * extra
|
|
|
1053 */
|
|
|
1054 off_left = (int)startcol - (int)curwin->w_leftcol - p_siso;
|
|
|
1055 off_right = (int)endcol - (int)(curwin->w_leftcol + W_WIDTH(curwin)
|
|
|
1056 - p_siso) + 1;
|
|
|
1057 if (off_left < 0 || off_right > 0)
|
|
|
1058 {
|
|
|
1059 if (off_left < 0)
|
|
|
1060 diff = -off_left;
|
|
|
1061 else
|
|
|
1062 diff = off_right;
|
|
|
1063
|
|
|
1064 /* When far off or not enough room on either side, put cursor in
|
|
|
1065 * middle of window. */
|
|
|
1066 if (p_ss == 0 || diff >= textwidth / 2 || off_right >= off_left)
|
|
|
1067 new_leftcol = curwin->w_wcol - extra - textwidth / 2;
|
|
|
1068 else
|
|
|
1069 {
|
|
|
1070 if (diff < p_ss)
|
|
|
1071 diff = p_ss;
|
|
|
1072 if (off_left < 0)
|
|
|
1073 new_leftcol = curwin->w_leftcol - diff;
|
|
|
1074 else
|
|
|
1075 new_leftcol = curwin->w_leftcol + diff;
|
|
|
1076 }
|
|
|
1077 if (new_leftcol < 0)
|
|
|
1078 new_leftcol = 0;
|
|
|
1079 if (new_leftcol != (int)curwin->w_leftcol)
|
|
|
1080 {
|
|
|
1081 curwin->w_leftcol = new_leftcol;
|
|
|
1082 /* screen has to be redrawn with new curwin->w_leftcol */
|
|
|
1083 redraw_later(NOT_VALID);
|
|
|
1084 }
|
|
|
1085 }
|
|
|
1086 curwin->w_wcol -= curwin->w_leftcol;
|
|
|
1087 }
|
|
|
1088 else if (curwin->w_wcol > (int)curwin->w_leftcol)
|
|
|
1089 curwin->w_wcol -= curwin->w_leftcol;
|
|
|
1090 else
|
|
|
1091 curwin->w_wcol = 0;
|
|
|
1092
|
|
|
1093 #ifdef FEAT_DIFF
|
|
|
1094 /* Skip over filler lines. At the top use w_topfill, there
|
|
|
1095 * may be some filler lines above the window. */
|
|
|
1096 if (curwin->w_cursor.lnum == curwin->w_topline)
|
|
|
1097 curwin->w_wrow += curwin->w_topfill;
|
|
|
1098 else
|
|
|
1099 curwin->w_wrow += diff_check_fill(curwin, curwin->w_cursor.lnum);
|
|
|
1100 #endif
|
|
|
1101
|
|
|
1102 prev_skipcol = curwin->w_skipcol;
|
|
|
1103
|
|
|
1104 p_lines = 0;
|
|
|
1105 if ((curwin->w_wrow >= curwin->w_height
|
|
|
1106 || ((prev_skipcol > 0
|
|
|
1107 || curwin->w_wrow + p_so >= curwin->w_height)
|
|
|
1108 && (p_lines =
|
|
|
1109 #ifdef FEAT_DIFF
|
|
|
1110 plines_win_nofill
|
|
|
1111 #else
|
|
|
1112 plines_win
|
|
|
1113 #endif
|
|
|
1114 (curwin, curwin->w_cursor.lnum, FALSE))
|
|
|
1115 - 1 >= curwin->w_height))
|
|
|
1116 && curwin->w_height != 0
|
|
|
1117 && curwin->w_cursor.lnum == curwin->w_topline
|
|
|
1118 && width > 0
|
|
|
1119 #ifdef FEAT_VERTSPLIT
|
|
|
1120 && curwin->w_width != 0
|
|
|
1121 #endif
|
|
|
1122 )
|
|
|
1123 {
|
|
|
1124 /* Cursor past end of screen. Happens with a single line that does
|
|
|
1125 * not fit on screen. Find a skipcol to show the text around the
|
|
|
1126 * cursor. Avoid scrolling all the time. compute value of "extra":
|
|
|
1127 * 1: Less than "p_so" lines above
|
|
|
1128 * 2: Less than "p_so" lines below
|
|
|
1129 * 3: both of them */
|
|
|
1130 extra = 0;
|
|
|
1131 if (curwin->w_skipcol + p_so * width > curwin->w_virtcol)
|
|
|
1132 extra = 1;
|
|
|
1133 /* Compute last display line of the buffer line that we want at the
|
|
|
1134 * bottom of the window. */
|
|
|
1135 if (p_lines == 0)
|
|
|
1136 p_lines = plines_win(curwin, curwin->w_cursor.lnum, FALSE);
|
|
|
1137 --p_lines;
|
|
|
1138 if (p_lines > curwin->w_wrow + p_so)
|
|
|
1139 n = curwin->w_wrow + p_so;
|
|
|
1140 else
|
|
|
1141 n = p_lines;
|
|
|
1142 if ((colnr_T)n >= curwin->w_height + curwin->w_skipcol / width)
|
|
|
1143 extra += 2;
|
|
|
1144
|
|
|
1145 if (extra == 3 || p_lines < p_so * 2)
|
|
|
1146 {
|
|
|
1147 /* not enough room for 'scrolloff', put cursor in the middle */
|
|
|
1148 n = curwin->w_virtcol / width;
|
|
|
1149 if (n > curwin->w_height / 2)
|
|
|
1150 n -= curwin->w_height / 2;
|
|
|
1151 else
|
|
|
1152 n = 0;
|
|
|
1153 /* don't skip more than necessary */
|
|
|
1154 if (n > p_lines - curwin->w_height + 1)
|
|
|
1155 n = p_lines - curwin->w_height + 1;
|
|
|
1156 curwin->w_skipcol = n * width;
|
|
|
1157 }
|
|
|
1158 else if (extra == 1)
|
|
|
1159 {
|
|
|
1160 /* less then 'scrolloff' lines above, decrease skipcol */
|
|
|
1161 extra = (curwin->w_skipcol + p_so * width - curwin->w_virtcol
|
|
|
1162 + width - 1) / width;
|
|
|
1163 if (extra > 0)
|
|
|
1164 {
|
|
|
1165 if ((colnr_T)(extra * width) > curwin->w_skipcol)
|
|
|
1166 extra = curwin->w_skipcol / width;
|
|
|
1167 curwin->w_skipcol -= extra * width;
|
|
|
1168 }
|
|
|
1169 }
|
|
|
1170 else if (extra == 2)
|
|
|
1171 {
|
|
|
1172 /* less then 'scrolloff' lines below, increase skipcol */
|
|
|
1173 endcol = (n - curwin->w_height + 1) * width;
|
|
|
1174 while (endcol > curwin->w_virtcol)
|
|
|
1175 endcol -= width;
|
|
|
1176 if (endcol > curwin->w_skipcol)
|
|
|
1177 curwin->w_skipcol = endcol;
|
|
|
1178 }
|
|
|
1179
|
|
|
1180 curwin->w_wrow -= curwin->w_skipcol / width;
|
|
|
1181 if (curwin->w_wrow >= curwin->w_height)
|
|
|
1182 {
|
|
|
1183 /* small window, make sure cursor is in it */
|
|
|
1184 extra = curwin->w_wrow - curwin->w_height + 1;
|
|
|
1185 curwin->w_skipcol += extra * width;
|
|
|
1186 curwin->w_wrow -= extra;
|
|
|
1187 }
|
|
|
1188
|
|
|
1189 extra = ((int)prev_skipcol - (int)curwin->w_skipcol) / width;
|
|
|
1190 if (extra > 0)
|
|
|
1191 win_ins_lines(curwin, 0, extra, FALSE, FALSE);
|
|
|
1192 else if (extra < 0)
|
|
|
1193 win_del_lines(curwin, 0, -extra, FALSE, FALSE);
|
|
|
1194 }
|
|
|
1195 else
|
|
|
1196 curwin->w_skipcol = 0;
|
|
|
1197 if (prev_skipcol != curwin->w_skipcol)
|
|
|
1198 redraw_later(NOT_VALID);
|
|
|
1199
|
|
|
1200 curwin->w_valid |= VALID_WCOL|VALID_WROW|VALID_VIRTCOL;
|
|
|
1201 }
|
|
|
1202
|
|
|
1203 /*
|
|
|
1204 * Scroll the current window down by "line_count" logical lines. "CTRL-Y"
|
|
|
1205 */
|
|
|
1206 /*ARGSUSED*/
|
|
|
1207 void
|
|
|
1208 scrolldown(line_count, byfold)
|
|
|
1209 long line_count;
|
|
|
1210 int byfold; /* TRUE: count a closed fold as one line */
|
|
|
1211 {
|
|
|
1212 long done = 0; /* total # of physical lines done */
|
|
|
1213 int wrow;
|
|
|
1214 int moved = FALSE;
|
|
|
1215
|
|
|
1216 #ifdef FEAT_FOLDING
|
|
|
1217 linenr_T first;
|
|
|
1218
|
|
|
1219 /* Make sure w_topline is at the first of a sequence of folded lines. */
|
|
|
1220 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
|
1221 #endif
|
|
|
1222 validate_cursor(); /* w_wrow needs to be valid */
|
|
|
1223 while (line_count-- > 0)
|
|
|
1224 {
|
|
|
1225 #ifdef FEAT_DIFF
|
|
|
1226 if (curwin->w_topfill < diff_check(curwin, curwin->w_topline))
|
|
|
1227 {
|
|
|
1228 ++curwin->w_topfill;
|
|
|
1229 ++done;
|
|
|
1230 }
|
|
|
1231 else
|
|
|
1232 #endif
|
|
|
1233 {
|
|
|
1234 if (curwin->w_topline == 1)
|
|
|
1235 break;
|
|
|
1236 --curwin->w_topline;
|
|
|
1237 #ifdef FEAT_DIFF
|
|
|
1238 curwin->w_topfill = 0;
|
|
|
1239 #endif
|
|
|
1240 #ifdef FEAT_FOLDING
|
|
|
1241 /* A sequence of folded lines only counts for one logical line */
|
|
|
1242 if (hasFolding(curwin->w_topline, &first, NULL))
|
|
|
1243 {
|
|
|
1244 ++done;
|
|
|
1245 if (!byfold)
|
|
|
1246 line_count -= curwin->w_topline - first - 1;
|
|
|
1247 curwin->w_botline -= curwin->w_topline - first;
|
|
|
1248 curwin->w_topline = first;
|
|
|
1249 }
|
|
|
1250 else
|
|
|
1251 #endif
|
|
|
1252 #ifdef FEAT_DIFF
|
|
|
1253 done += plines_nofill(curwin->w_topline);
|
|
|
1254 #else
|
|
|
1255 done += plines(curwin->w_topline);
|
|
|
1256 #endif
|
|
|
1257 }
|
|
|
1258 --curwin->w_botline; /* approximate w_botline */
|
|
|
1259 invalidate_botline();
|
|
|
1260 }
|
|
|
1261 curwin->w_wrow += done; /* keep w_wrow updated */
|
|
|
1262 curwin->w_cline_row += done; /* keep w_cline_row updated */
|
|
|
1263
|
|
|
1264 #ifdef FEAT_DIFF
|
|
|
1265 if (curwin->w_cursor.lnum == curwin->w_topline)
|
|
|
1266 curwin->w_cline_row = 0;
|
|
|
1267 check_topfill(curwin, TRUE);
|
|
|
1268 #endif
|
|
|
1269
|
|
|
1270 /*
|
|
|
1271 * Compute the row number of the last row of the cursor line
|
|
|
1272 * and move the cursor onto the displayed part of the window.
|
|
|
1273 */
|
|
|
1274 wrow = curwin->w_wrow;
|
|
|
1275 if (curwin->w_p_wrap
|
|
|
1276 #ifdef FEAT_VERTSPLIT
|
|
|
1277 && curwin->w_width != 0
|
|
|
1278 #endif
|
|
|
1279 )
|
|
|
1280 {
|
|
|
1281 validate_virtcol();
|
|
|
1282 validate_cheight();
|
|
|
1283 wrow += curwin->w_cline_height - 1 -
|
|
|
1284 curwin->w_virtcol / W_WIDTH(curwin);
|
|
|
1285 }
|
|
|
1286 while (wrow >= curwin->w_height && curwin->w_cursor.lnum > 1)
|
|
|
1287 {
|
|
|
1288 #ifdef FEAT_FOLDING
|
|
|
1289 if (hasFolding(curwin->w_cursor.lnum, &first, NULL))
|
|
|
1290 {
|
|
|
1291 --wrow;
|
|
|
1292 if (first == 1)
|
|
|
1293 curwin->w_cursor.lnum = 1;
|
|
|
1294 else
|
|
|
1295 curwin->w_cursor.lnum = first - 1;
|
|
|
1296 }
|
|
|
1297 else
|
|
|
1298 #endif
|
|
|
1299 wrow -= plines(curwin->w_cursor.lnum--);
|
|
|
1300 curwin->w_valid &=
|
|
|
1301 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW|VALID_VIRTCOL);
|
|
|
1302 moved = TRUE;
|
|
|
1303 }
|
|
|
1304 if (moved)
|
|
|
1305 {
|
|
|
1306 #ifdef FEAT_FOLDING
|
|
|
1307 /* Move cursor to first line of closed fold. */
|
|
|
1308 foldAdjustCursor();
|
|
|
1309 #endif
|
|
|
1310 coladvance(curwin->w_curswant);
|
|
|
1311 }
|
|
|
1312 }
|
|
|
1313
|
|
|
1314 /*
|
|
|
1315 * Scroll the current window up by "line_count" logical lines. "CTRL-E"
|
|
|
1316 */
|
|
|
1317 /*ARGSUSED*/
|
|
|
1318 void
|
|
|
1319 scrollup(line_count, byfold)
|
|
|
1320 long line_count;
|
|
|
1321 int byfold; /* TRUE: count a closed fold as one line */
|
|
|
1322 {
|
|
|
1323 #if defined(FEAT_FOLDING) || defined(FEAT_DIFF)
|
|
|
1324 linenr_T lnum;
|
|
|
1325
|
|
|
1326 if (
|
|
|
1327 # ifdef FEAT_FOLDING
|
|
|
1328 (byfold && hasAnyFolding(curwin))
|
|
|
1329 # ifdef FEAT_DIFF
|
|
|
1330 ||
|
|
|
1331 # endif
|
|
|
1332 # endif
|
|
|
1333 # ifdef FEAT_DIFF
|
|
|
1334 curwin->w_p_diff
|
|
|
1335 # endif
|
|
|
1336 )
|
|
|
1337 {
|
|
|
1338 /* count each sequence of folded lines as one logical line */
|
|
|
1339 lnum = curwin->w_topline;
|
|
|
1340 while (line_count--)
|
|
|
1341 {
|
|
|
1342 # ifdef FEAT_DIFF
|
|
|
1343 if (curwin->w_topfill > 0)
|
|
|
1344 --curwin->w_topfill;
|
|
|
1345 else
|
|
|
1346 # endif
|
|
|
1347 {
|
|
|
1348 # ifdef FEAT_FOLDING
|
|
|
1349 if (byfold)
|
|
|
1350 (void)hasFolding(lnum, NULL, &lnum);
|
|
|
1351 # endif
|
|
|
1352 if (lnum >= curbuf->b_ml.ml_line_count)
|
|
|
1353 break;
|
|
|
1354 ++lnum;
|
|
|
1355 # ifdef FEAT_DIFF
|
|
|
1356 curwin->w_topfill = diff_check_fill(curwin, lnum);
|
|
|
1357 # endif
|
|
|
1358 }
|
|
|
1359 }
|
|
|
1360 /* approximate w_botline */
|
|
|
1361 curwin->w_botline += lnum - curwin->w_topline;
|
|
|
1362 curwin->w_topline = lnum;
|
|
|
1363 }
|
|
|
1364 else
|
|
|
1365 #endif
|
|
|
1366 {
|
|
|
1367 curwin->w_topline += line_count;
|
|
|
1368 curwin->w_botline += line_count; /* approximate w_botline */
|
|
|
1369 }
|
|
|
1370
|
|
|
1371 if (curwin->w_topline > curbuf->b_ml.ml_line_count)
|
|
|
1372 curwin->w_topline = curbuf->b_ml.ml_line_count;
|
|
|
1373 if (curwin->w_botline > curbuf->b_ml.ml_line_count + 1)
|
|
|
1374 curwin->w_botline = curbuf->b_ml.ml_line_count + 1;
|
|
|
1375
|
|
|
1376 #ifdef FEAT_DIFF
|
|
|
1377 check_topfill(curwin, FALSE);
|
|
|
1378 #endif
|
|
|
1379
|
|
|
1380 #ifdef FEAT_FOLDING
|
|
|
1381 if (hasAnyFolding(curwin))
|
|
|
1382 /* Make sure w_topline is at the first of a sequence of folded lines. */
|
|
|
1383 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
|
1384 #endif
|
|
|
1385
|
|
|
1386 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
|
1387 if (curwin->w_cursor.lnum < curwin->w_topline)
|
|
|
1388 {
|
|
|
1389 curwin->w_cursor.lnum = curwin->w_topline;
|
|
|
1390 curwin->w_valid &=
|
|
|
1391 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW|VALID_VIRTCOL);
|
|
|
1392 coladvance(curwin->w_curswant);
|
|
|
1393 }
|
|
|
1394 }
|
|
|
1395
|
|
|
1396 #ifdef FEAT_DIFF
|
|
|
1397 /*
|
|
|
1398 * Don't end up with too many filler lines in the window.
|
|
|
1399 */
|
|
|
1400 void
|
|
|
1401 check_topfill(wp, down)
|
|
|
1402 win_T *wp;
|
|
|
1403 int down; /* when TRUE scroll down when not enough space */
|
|
|
1404 {
|
|
|
1405 int n;
|
|
|
1406
|
|
|
1407 if (wp->w_topfill > 0)
|
|
|
1408 {
|
|
|
1409 n = plines_win_nofill(wp, wp->w_topline, TRUE);
|
|
|
1410 if (wp->w_topfill + n > wp->w_height)
|
|
|
1411 {
|
|
|
1412 if (down && wp->w_topline > 1)
|
|
|
1413 {
|
|
|
1414 --wp->w_topline;
|
|
|
1415 wp->w_topfill = 0;
|
|
|
1416 }
|
|
|
1417 else
|
|
|
1418 {
|
|
|
1419 wp->w_topfill = wp->w_height - n;
|
|
|
1420 if (wp->w_topfill < 0)
|
|
|
1421 wp->w_topfill = 0;
|
|
|
1422 }
|
|
|
1423 }
|
|
|
1424 }
|
|
|
1425 }
|
|
|
1426
|
|
|
1427 /*
|
|
|
1428 * Use as many filler lines as possible for w_topline. Make sure w_topline
|
|
|
1429 * is still visible.
|
|
|
1430 */
|
|
|
1431 static void
|
|
|
1432 max_topfill()
|
|
|
1433 {
|
|
|
1434 int n;
|
|
|
1435
|
|
|
1436 n = plines_nofill(curwin->w_topline);
|
|
|
1437 if (n >= curwin->w_height)
|
|
|
1438 curwin->w_topfill = 0;
|
|
|
1439 else
|
|
|
1440 {
|
|
|
1441 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline);
|
|
|
1442 if (curwin->w_topfill + n > curwin->w_height)
|
|
|
1443 curwin->w_topfill = curwin->w_height - n;
|
|
|
1444 }
|
|
|
1445 }
|
|
|
1446 #endif
|
|
|
1447
|
|
|
1448 #if defined(FEAT_INS_EXPAND) || defined(PROTO)
|
|
|
1449 /*
|
|
|
1450 * Scroll the screen one line down, but don't do it if it would move the
|
|
|
1451 * cursor off the screen.
|
|
|
1452 */
|
|
|
1453 void
|
|
|
1454 scrolldown_clamp()
|
|
|
1455 {
|
|
|
1456 int end_row;
|
|
|
1457 #ifdef FEAT_DIFF
|
|
|
1458 int can_fill = (curwin->w_topfill
|
|
|
1459 < diff_check_fill(curwin, curwin->w_topline));
|
|
|
1460 #endif
|
|
|
1461
|
|
|
1462 if (curwin->w_topline <= 1
|
|
|
1463 #ifdef FEAT_DIFF
|
|
|
1464 && !can_fill
|
|
|
1465 #endif
|
|
|
1466 )
|
|
|
1467 return;
|
|
|
1468
|
|
|
1469 validate_cursor(); /* w_wrow needs to be valid */
|
|
|
1470
|
|
|
1471 /*
|
|
|
1472 * Compute the row number of the last row of the cursor line
|
|
|
1473 * and make sure it doesn't go off the screen. Make sure the cursor
|
|
|
1474 * doesn't go past 'scrolloff' lines from the screen end.
|
|
|
1475 */
|
|
|
1476 end_row = curwin->w_wrow;
|
|
|
1477 #ifdef FEAT_DIFF
|
|
|
1478 if (can_fill)
|
|
|
1479 ++end_row;
|
|
|
1480 else
|
|
|
1481 end_row += plines_nofill(curwin->w_topline - 1);
|
|
|
1482 #else
|
|
|
1483 end_row += plines(curwin->w_topline - 1);
|
|
|
1484 #endif
|
|
|
1485 if (curwin->w_p_wrap
|
|
|
1486 #ifdef FEAT_VERTSPLIT
|
|
|
1487 && curwin->w_width != 0
|
|
|
1488 #endif
|
|
|
1489 )
|
|
|
1490 {
|
|
|
1491 validate_cheight();
|
|
|
1492 validate_virtcol();
|
|
|
1493 end_row += curwin->w_cline_height - 1 -
|
|
|
1494 curwin->w_virtcol / W_WIDTH(curwin);
|
|
|
1495 }
|
|
|
1496 if (end_row < curwin->w_height - p_so)
|
|
|
1497 {
|
|
|
1498 #ifdef FEAT_DIFF
|
|
|
1499 if (can_fill)
|
|
|
1500 {
|
|
|
1501 ++curwin->w_topfill;
|
|
|
1502 check_topfill(curwin, TRUE);
|
|
|
1503 }
|
|
|
1504 else
|
|
|
1505 {
|
|
|
1506 --curwin->w_topline;
|
|
|
1507 curwin->w_topfill = 0;
|
|
|
1508 }
|
|
|
1509 #else
|
|
|
1510 --curwin->w_topline;
|
|
|
1511 #endif
|
|
|
1512 #ifdef FEAT_FOLDING
|
|
|
1513 hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
|
1514 #endif
|
|
|
1515 --curwin->w_botline; /* approximate w_botline */
|
|
|
1516 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
|
1517 }
|
|
|
1518 }
|
|
|
1519
|
|
|
1520 /*
|
|
|
1521 * Scroll the screen one line up, but don't do it if it would move the cursor
|
|
|
1522 * off the screen.
|
|
|
1523 */
|
|
|
1524 void
|
|
|
1525 scrollup_clamp()
|
|
|
1526 {
|
|
|
1527 int start_row;
|
|
|
1528
|
|
|
1529 if (curwin->w_topline == curbuf->b_ml.ml_line_count
|
|
|
1530 #ifdef FEAT_DIFF
|
|
|
1531 && curwin->w_topfill == 0
|
|
|
1532 #endif
|
|
|
1533 )
|
|
|
1534 return;
|
|
|
1535
|
|
|
1536 validate_cursor(); /* w_wrow needs to be valid */
|
|
|
1537
|
|
|
1538 /*
|
|
|
1539 * Compute the row number of the first row of the cursor line
|
|
|
1540 * and make sure it doesn't go off the screen. Make sure the cursor
|
|
|
1541 * doesn't go before 'scrolloff' lines from the screen start.
|
|
|
1542 */
|
|
|
1543 #ifdef FEAT_DIFF
|
|
|
1544 start_row = curwin->w_wrow - plines_nofill(curwin->w_topline)
|
|
|
1545 - curwin->w_topfill;
|
|
|
1546 #else
|
|
|
1547 start_row = curwin->w_wrow - plines(curwin->w_topline);
|
|
|
1548 #endif
|
|
|
1549 if (curwin->w_p_wrap
|
|
|
1550 #ifdef FEAT_VERTSPLIT
|
|
|
1551 && curwin->w_width != 0
|
|
|
1552 #endif
|
|
|
1553 )
|
|
|
1554 {
|
|
|
1555 validate_virtcol();
|
|
|
1556 start_row -= curwin->w_virtcol / W_WIDTH(curwin);
|
|
|
1557 }
|
|
|
1558 if (start_row >= p_so)
|
|
|
1559 {
|
|
|
1560 #ifdef FEAT_DIFF
|
|
|
1561 if (curwin->w_topfill > 0)
|
|
|
1562 --curwin->w_topfill;
|
|
|
1563 else
|
|
|
1564 #endif
|
|
36
|
1565 {
|
|
|
1566 #ifdef FEAT_FOLDING
|
|
|
1567 (void)hasFolding(curwin->w_topline, NULL, &curwin->w_topline);
|
|
|
1568 #endif
|
|
7
|
1569 ++curwin->w_topline;
|
|
36
|
1570 }
|
|
7
|
1571 ++curwin->w_botline; /* approximate w_botline */
|
|
|
1572 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
|
1573 }
|
|
|
1574 }
|
|
|
1575 #endif /* FEAT_INS_EXPAND */
|
|
|
1576
|
|
|
1577 /*
|
|
|
1578 * Add one line above "lp->lnum". This can be a filler line, a closed fold or
|
|
|
1579 * a (wrapped) text line. Uses and sets "lp->fill".
|
|
|
1580 * Returns the height of the added line in "lp->height".
|
|
|
1581 * Lines above the first one are incredibly high.
|
|
|
1582 */
|
|
|
1583 static void
|
|
|
1584 topline_back(lp)
|
|
|
1585 lineoff_T *lp;
|
|
|
1586 {
|
|
|
1587 #ifdef FEAT_DIFF
|
|
|
1588 if (lp->fill < diff_check_fill(curwin, lp->lnum))
|
|
|
1589 {
|
|
|
1590 /* Add a filler line. */
|
|
|
1591 ++lp->fill;
|
|
|
1592 lp->height = 1;
|
|
|
1593 }
|
|
|
1594 else
|
|
|
1595 #endif
|
|
|
1596 {
|
|
|
1597 --lp->lnum;
|
|
|
1598 #ifdef FEAT_DIFF
|
|
|
1599 lp->fill = 0;
|
|
|
1600 #endif
|
|
|
1601 if (lp->lnum < 1)
|
|
|
1602 lp->height = MAXCOL;
|
|
|
1603 else
|
|
|
1604 #ifdef FEAT_FOLDING
|
|
|
1605 if (hasFolding(lp->lnum, &lp->lnum, NULL))
|
|
|
1606 /* Add a closed fold */
|
|
|
1607 lp->height = 1;
|
|
|
1608 else
|
|
|
1609 #endif
|
|
|
1610 {
|
|
|
1611 #ifdef FEAT_DIFF
|
|
|
1612 lp->height = plines_nofill(lp->lnum);
|
|
|
1613 #else
|
|
|
1614 lp->height = plines(lp->lnum);
|
|
|
1615 #endif
|
|
|
1616 }
|
|
|
1617 }
|
|
|
1618 }
|
|
|
1619
|
|
|
1620 /*
|
|
|
1621 * Add one line below "lp->lnum". This can be a filler line, a closed fold or
|
|
|
1622 * a (wrapped) text line. Uses and sets "lp->fill".
|
|
|
1623 * Returns the height of the added line in "lp->height".
|
|
|
1624 * Lines below the last one are incredibly high.
|
|
|
1625 */
|
|
|
1626 static void
|
|
|
1627 botline_forw(lp)
|
|
|
1628 lineoff_T *lp;
|
|
|
1629 {
|
|
|
1630 #ifdef FEAT_DIFF
|
|
|
1631 if (lp->fill < diff_check_fill(curwin, lp->lnum + 1))
|
|
|
1632 {
|
|
|
1633 /* Add a filler line. */
|
|
|
1634 ++lp->fill;
|
|
|
1635 lp->height = 1;
|
|
|
1636 }
|
|
|
1637 else
|
|
|
1638 #endif
|
|
|
1639 {
|
|
|
1640 ++lp->lnum;
|
|
|
1641 #ifdef FEAT_DIFF
|
|
|
1642 lp->fill = 0;
|
|
|
1643 #endif
|
|
|
1644 if (lp->lnum > curbuf->b_ml.ml_line_count)
|
|
|
1645 lp->height = MAXCOL;
|
|
|
1646 else
|
|
|
1647 #ifdef FEAT_FOLDING
|
|
|
1648 if (hasFolding(lp->lnum, NULL, &lp->lnum))
|
|
|
1649 /* Add a closed fold */
|
|
|
1650 lp->height = 1;
|
|
|
1651 else
|
|
|
1652 #endif
|
|
|
1653 {
|
|
|
1654 #ifdef FEAT_DIFF
|
|
|
1655 lp->height = plines_nofill(lp->lnum);
|
|
|
1656 #else
|
|
|
1657 lp->height = plines(lp->lnum);
|
|
|
1658 #endif
|
|
|
1659 }
|
|
|
1660 }
|
|
|
1661 }
|
|
|
1662
|
|
|
1663 #ifdef FEAT_DIFF
|
|
|
1664 /*
|
|
|
1665 * Switch from including filler lines below lp->lnum to including filler
|
|
|
1666 * lines above loff.lnum + 1. This keeps pointing to the same line.
|
|
|
1667 * When there are no filler lines nothing changes.
|
|
|
1668 */
|
|
|
1669 static void
|
|
|
1670 botline_topline(lp)
|
|
|
1671 lineoff_T *lp;
|
|
|
1672 {
|
|
|
1673 if (lp->fill > 0)
|
|
|
1674 {
|
|
|
1675 ++lp->lnum;
|
|
|
1676 lp->fill = diff_check_fill(curwin, lp->lnum) - lp->fill + 1;
|
|
|
1677 }
|
|
|
1678 }
|
|
|
1679
|
|
|
1680 /*
|
|
|
1681 * Switch from including filler lines above lp->lnum to including filler
|
|
|
1682 * lines below loff.lnum - 1. This keeps pointing to the same line.
|
|
|
1683 * When there are no filler lines nothing changes.
|
|
|
1684 */
|
|
|
1685 static void
|
|
|
1686 topline_botline(lp)
|
|
|
1687 lineoff_T *lp;
|
|
|
1688 {
|
|
|
1689 if (lp->fill > 0)
|
|
|
1690 {
|
|
|
1691 lp->fill = diff_check_fill(curwin, lp->lnum) - lp->fill + 1;
|
|
|
1692 --lp->lnum;
|
|
|
1693 }
|
|
|
1694 }
|
|
|
1695 #endif
|
|
|
1696
|
|
|
1697 /*
|
|
|
1698 * Recompute topline to put the cursor at the top of the window.
|
|
|
1699 * Scroll at least "min_scroll" lines.
|
|
|
1700 * If "always" is TRUE, always set topline (for "zt").
|
|
|
1701 */
|
|
|
1702 void
|
|
|
1703 scroll_cursor_top(min_scroll, always)
|
|
|
1704 int min_scroll;
|
|
|
1705 int always;
|
|
|
1706 {
|
|
|
1707 int scrolled = 0;
|
|
|
1708 int extra = 0;
|
|
|
1709 int used;
|
|
|
1710 int i;
|
|
|
1711 linenr_T top; /* just above displayed lines */
|
|
|
1712 linenr_T bot; /* just below displayed lines */
|
|
|
1713 linenr_T old_topline = curwin->w_topline;
|
|
|
1714 #ifdef FEAT_DIFF
|
|
|
1715 linenr_T old_topfill = curwin->w_topfill;
|
|
|
1716 #endif
|
|
|
1717 linenr_T new_topline;
|
|
|
1718 int off = p_so;
|
|
|
1719
|
|
|
1720 #ifdef FEAT_MOUSE
|
|
|
1721 if (mouse_dragging > 0)
|
|
|
1722 off = mouse_dragging - 1;
|
|
|
1723 #endif
|
|
|
1724
|
|
|
1725 /*
|
|
|
1726 * Decrease topline until:
|
|
|
1727 * - it has become 1
|
|
|
1728 * - (part of) the cursor line is moved off the screen or
|
|
|
1729 * - moved at least 'scrolljump' lines and
|
|
|
1730 * - at least 'scrolloff' lines above and below the cursor
|
|
|
1731 */
|
|
|
1732 validate_cheight();
|
|
|
1733 used = curwin->w_cline_height;
|
|
|
1734 if (curwin->w_cursor.lnum < curwin->w_topline)
|
|
|
1735 scrolled = used;
|
|
|
1736
|
|
|
1737 #ifdef FEAT_FOLDING
|
|
|
1738 if (hasFolding(curwin->w_cursor.lnum, &top, &bot))
|
|
|
1739 {
|
|
|
1740 --top;
|
|
|
1741 ++bot;
|
|
|
1742 }
|
|
|
1743 else
|
|
|
1744 #endif
|
|
|
1745 {
|
|
|
1746 top = curwin->w_cursor.lnum - 1;
|
|
|
1747 bot = curwin->w_cursor.lnum + 1;
|
|
|
1748 }
|
|
|
1749 new_topline = top + 1;
|
|
|
1750
|
|
|
1751 #ifdef FEAT_DIFF
|
|
|
1752 /* count filler lines of the cursor window as context */
|
|
|
1753 i = diff_check_fill(curwin, curwin->w_cursor.lnum);
|
|
|
1754 used += i;
|
|
|
1755 extra += i;
|
|
|
1756 #endif
|
|
|
1757
|
|
|
1758 /*
|
|
|
1759 * Check if the lines from "top" to "bot" fit in the window. If they do,
|
|
|
1760 * set new_topline and advance "top" and "bot" to include more lines.
|
|
|
1761 */
|
|
|
1762 while (top > 0)
|
|
|
1763 {
|
|
|
1764 #ifdef FEAT_FOLDING
|
|
|
1765 if (hasFolding(top, &top, NULL))
|
|
|
1766 /* count one logical line for a sequence of folded lines */
|
|
|
1767 i = 1;
|
|
|
1768 else
|
|
|
1769 #endif
|
|
|
1770 i = plines(top);
|
|
|
1771 used += i;
|
|
|
1772 if (extra + i <= off && bot < curbuf->b_ml.ml_line_count)
|
|
|
1773 {
|
|
|
1774 #ifdef FEAT_FOLDING
|
|
|
1775 if (hasFolding(bot, NULL, &bot))
|
|
|
1776 /* count one logical line for a sequence of folded lines */
|
|
|
1777 ++used;
|
|
|
1778 else
|
|
|
1779 #endif
|
|
|
1780 used += plines(bot);
|
|
|
1781 }
|
|
|
1782 if (used > curwin->w_height)
|
|
|
1783 break;
|
|
|
1784 if (top < curwin->w_topline)
|
|
|
1785 scrolled += i;
|
|
|
1786
|
|
|
1787 /*
|
|
|
1788 * If scrolling is needed, scroll at least 'sj' lines.
|
|
|
1789 */
|
|
|
1790 if ((new_topline >= curwin->w_topline || scrolled > min_scroll)
|
|
|
1791 && extra >= off)
|
|
|
1792 break;
|
|
|
1793
|
|
|
1794 extra += i;
|
|
|
1795 new_topline = top;
|
|
|
1796 --top;
|
|
|
1797 ++bot;
|
|
|
1798 }
|
|
|
1799
|
|
|
1800 /*
|
|
|
1801 * If we don't have enough space, put cursor in the middle.
|
|
|
1802 * This makes sure we get the same position when using "k" and "j"
|
|
|
1803 * in a small window.
|
|
|
1804 */
|
|
|
1805 if (used > curwin->w_height)
|
|
|
1806 scroll_cursor_halfway(FALSE);
|
|
|
1807 else
|
|
|
1808 {
|
|
|
1809 /*
|
|
|
1810 * If "always" is FALSE, only adjust topline to a lower value, higher
|
|
|
1811 * value may happen with wrapping lines
|
|
|
1812 */
|
|
|
1813 if (new_topline < curwin->w_topline || always)
|
|
|
1814 curwin->w_topline = new_topline;
|
|
|
1815 if (curwin->w_topline > curwin->w_cursor.lnum)
|
|
|
1816 curwin->w_topline = curwin->w_cursor.lnum;
|
|
|
1817 #ifdef FEAT_DIFF
|
|
|
1818 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline);
|
|
|
1819 if (curwin->w_topfill > 0 && extra > off)
|
|
|
1820 {
|
|
|
1821 curwin->w_topfill -= extra - off;
|
|
|
1822 if (curwin->w_topfill < 0)
|
|
|
1823 curwin->w_topfill = 0;
|
|
|
1824 }
|
|
|
1825 check_topfill(curwin, FALSE);
|
|
|
1826 #endif
|
|
|
1827 if (curwin->w_topline != old_topline
|
|
|
1828 #ifdef FEAT_DIFF
|
|
|
1829 || curwin->w_topfill != old_topfill
|
|
|
1830 #endif
|
|
|
1831 )
|
|
|
1832 curwin->w_valid &=
|
|
|
1833 ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
|
1834 curwin->w_valid |= VALID_TOPLINE;
|
|
|
1835 }
|
|
|
1836 }
|
|
|
1837
|
|
|
1838 /*
|
|
|
1839 * Set w_empty_rows and w_filler_rows for window "wp", having used up "used"
|
|
|
1840 * screen lines for text lines.
|
|
|
1841 */
|
|
|
1842 void
|
|
|
1843 set_empty_rows(wp, used)
|
|
|
1844 win_T *wp;
|
|
|
1845 int used;
|
|
|
1846 {
|
|
|
1847 #ifdef FEAT_DIFF
|
|
|
1848 wp->w_filler_rows = 0;
|
|
|
1849 #endif
|
|
|
1850 if (used == 0)
|
|
|
1851 wp->w_empty_rows = 0; /* single line that doesn't fit */
|
|
|
1852 else
|
|
|
1853 {
|
|
|
1854 wp->w_empty_rows = wp->w_height - used;
|
|
|
1855 #ifdef FEAT_DIFF
|
|
|
1856 if (wp->w_botline <= wp->w_buffer->b_ml.ml_line_count)
|
|
|
1857 {
|
|
|
1858 wp->w_filler_rows = diff_check_fill(wp, wp->w_botline);
|
|
|
1859 if (wp->w_empty_rows > wp->w_filler_rows)
|
|
|
1860 wp->w_empty_rows -= wp->w_filler_rows;
|
|
|
1861 else
|
|
|
1862 {
|
|
|
1863 wp->w_filler_rows = wp->w_empty_rows;
|
|
|
1864 wp->w_empty_rows = 0;
|
|
|
1865 }
|
|
|
1866 }
|
|
|
1867 #endif
|
|
|
1868 }
|
|
|
1869 }
|
|
|
1870
|
|
|
1871 /*
|
|
|
1872 * Recompute topline to put the cursor at the bottom of the window.
|
|
|
1873 * Scroll at least "min_scroll" lines.
|
|
|
1874 * If "set_topbot" is TRUE, set topline and botline first (for "zb").
|
|
|
1875 * This is messy stuff!!!
|
|
|
1876 */
|
|
|
1877 void
|
|
|
1878 scroll_cursor_bot(min_scroll, set_topbot)
|
|
|
1879 int min_scroll;
|
|
|
1880 int set_topbot;
|
|
|
1881 {
|
|
|
1882 int used;
|
|
|
1883 int scrolled = 0;
|
|
|
1884 int extra = 0;
|
|
|
1885 int i;
|
|
|
1886 linenr_T line_count;
|
|
|
1887 linenr_T old_topline = curwin->w_topline;
|
|
|
1888 lineoff_T loff;
|
|
|
1889 lineoff_T boff;
|
|
|
1890 #ifdef FEAT_DIFF
|
|
|
1891 int old_topfill = curwin->w_topfill;
|
|
|
1892 int fill_below_window;
|
|
|
1893 #endif
|
|
|
1894 linenr_T old_botline = curwin->w_botline;
|
|
|
1895 linenr_T old_valid = curwin->w_valid;
|
|
|
1896 int old_empty_rows = curwin->w_empty_rows;
|
|
|
1897 linenr_T cln; /* Cursor Line Number */
|
|
|
1898
|
|
|
1899 cln = curwin->w_cursor.lnum;
|
|
|
1900 if (set_topbot)
|
|
|
1901 {
|
|
|
1902 used = 0;
|
|
|
1903 curwin->w_botline = cln + 1;
|
|
|
1904 #ifdef FEAT_DIFF
|
|
|
1905 loff.fill = 0;
|
|
|
1906 #endif
|
|
|
1907 for (curwin->w_topline = curwin->w_botline;
|
|
|
1908 curwin->w_topline > 1;
|
|
|
1909 curwin->w_topline = loff.lnum)
|
|
|
1910 {
|
|
|
1911 loff.lnum = curwin->w_topline;
|
|
|
1912 topline_back(&loff);
|
|
|
1913 if (used + loff.height > curwin->w_height)
|
|
|
1914 break;
|
|
|
1915 used += loff.height;
|
|
|
1916 #ifdef FEAT_DIFF
|
|
|
1917 curwin->w_topfill = loff.fill;
|
|
|
1918 #endif
|
|
|
1919 }
|
|
|
1920 set_empty_rows(curwin, used);
|
|
|
1921 curwin->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP;
|
|
|
1922 if (curwin->w_topline != old_topline
|
|
|
1923 #ifdef FEAT_DIFF
|
|
|
1924 || curwin->w_topfill != old_topfill
|
|
|
1925 #endif
|
|
|
1926 )
|
|
|
1927 curwin->w_valid &= ~(VALID_WROW|VALID_CROW);
|
|
|
1928 }
|
|
|
1929 else
|
|
|
1930 validate_botline();
|
|
|
1931
|
|
|
1932 /* The lines of the cursor line itself are always used. */
|
|
|
1933 #ifdef FEAT_DIFF
|
|
|
1934 used = plines_nofill(cln);
|
|
|
1935 #else
|
|
|
1936 validate_cheight();
|
|
|
1937 used = curwin->w_cline_height;
|
|
|
1938 #endif
|
|
|
1939
|
|
|
1940 /* If the cursor is below botline, we will at least scroll by the height
|
|
|
1941 * of the cursor line. Correct for empty lines, which are really part of
|
|
|
1942 * botline. */
|
|
|
1943 if (cln >= curwin->w_botline)
|
|
|
1944 {
|
|
|
1945 scrolled = used;
|
|
|
1946 if (cln == curwin->w_botline)
|
|
|
1947 scrolled -= curwin->w_empty_rows;
|
|
|
1948 }
|
|
|
1949
|
|
|
1950 /*
|
|
|
1951 * Stop counting lines to scroll when
|
|
|
1952 * - hitting start of the file
|
|
|
1953 * - scrolled nothing or at least 'sj' lines
|
|
|
1954 * - at least 'so' lines below the cursor
|
|
|
1955 * - lines between botline and cursor have been counted
|
|
|
1956 */
|
|
|
1957 #ifdef FEAT_FOLDING
|
|
|
1958 if (!hasFolding(curwin->w_cursor.lnum, &loff.lnum, &boff.lnum))
|
|
|
1959 #endif
|
|
|
1960 {
|
|
|
1961 loff.lnum = cln;
|
|
|
1962 boff.lnum = cln;
|
|
|
1963 }
|
|
|
1964 #ifdef FEAT_DIFF
|
|
|
1965 loff.fill = 0;
|
|
|
1966 boff.fill = 0;
|
|
|
1967 fill_below_window = diff_check_fill(curwin, curwin->w_botline)
|
|
|
1968 - curwin->w_filler_rows;
|
|
|
1969 #endif
|
|
|
1970
|
|
|
1971 while (loff.lnum > 1)
|
|
|
1972 {
|
|
|
1973 /* Stop when scrolled nothing or at least "min_scroll", found "extra"
|
|
|
1974 * context for 'scrolloff' and counted all lines below the window. */
|
|
|
1975 if ((((scrolled <= 0 || scrolled >= min_scroll)
|
|
|
1976 && extra >= (
|
|
|
1977 #ifdef FEAT_MOUSE
|
|
|
1978 mouse_dragging ? mouse_dragging - 1 :
|
|
|
1979 #endif
|
|
|
1980 p_so))
|
|
|
1981 || boff.lnum + 1 > curbuf->b_ml.ml_line_count)
|
|
|
1982 && loff.lnum <= curwin->w_botline
|
|
|
1983 #ifdef FEAT_DIFF
|
|
|
1984 && (loff.lnum < curwin->w_botline
|
|
|
1985 || loff.fill >= fill_below_window)
|
|
|
1986 #endif
|
|
|
1987 )
|
|
|
1988 break;
|
|
|
1989
|
|
|
1990 /* Add one line above */
|
|
|
1991 topline_back(&loff);
|
|
|
1992 used += loff.height;
|
|
|
1993 if (used > curwin->w_height)
|
|
|
1994 break;
|
|
|
1995 if (loff.lnum >= curwin->w_botline
|
|
|
1996 #ifdef FEAT_DIFF
|
|
|
1997 && (loff.lnum > curwin->w_botline
|
|
|
1998 || loff.fill <= fill_below_window)
|
|
|
1999 #endif
|
|
|
2000 )
|
|
|
2001 {
|
|
|
2002 /* Count screen lines that are below the window. */
|
|
|
2003 scrolled += loff.height;
|
|
|
2004 if (loff.lnum == curwin->w_botline
|
|
|
2005 #ifdef FEAT_DIFF
|
|
|
2006 && boff.fill == 0
|
|
|
2007 #endif
|
|
|
2008 )
|
|
|
2009 scrolled -= curwin->w_empty_rows;
|
|
|
2010 }
|
|
|
2011
|
|
|
2012 if (boff.lnum < curbuf->b_ml.ml_line_count)
|
|
|
2013 {
|
|
|
2014 /* Add one line below */
|
|
|
2015 botline_forw(&boff);
|
|
|
2016 used += boff.height;
|
|
|
2017 if (used > curwin->w_height)
|
|
|
2018 break;
|
|
|
2019 if (extra < (
|
|
|
2020 #ifdef FEAT_MOUSE
|
|
|
2021 mouse_dragging > 0 ? mouse_dragging - 1 :
|
|
|
2022 #endif
|
|
|
2023 p_so) || scrolled < min_scroll)
|
|
|
2024 {
|
|
|
2025 extra += boff.height;
|
|
|
2026 if (boff.lnum >= curwin->w_botline
|
|
|
2027 #ifdef FEAT_DIFF
|
|
|
2028 || (boff.lnum + 1 == curwin->w_botline
|
|
|
2029 && boff.fill > curwin->w_filler_rows)
|
|
|
2030 #endif
|
|
|
2031 )
|
|
|
2032 {
|
|
|
2033 /* Count screen lines that are below the window. */
|
|
|
2034 scrolled += boff.height;
|
|
|
2035 if (boff.lnum == curwin->w_botline
|
|
|
2036 #ifdef FEAT_DIFF
|
|
|
2037 && boff.fill == 0
|
|
|
2038 #endif
|
|
|
2039 )
|
|
|
2040 scrolled -= curwin->w_empty_rows;
|
|
|
2041 }
|
|
|
2042 }
|
|
|
2043 }
|
|
|
2044 }
|
|
|
2045
|
|
|
2046 /* curwin->w_empty_rows is larger, no need to scroll */
|
|
|
2047 if (scrolled <= 0)
|
|
|
2048 line_count = 0;
|
|
|
2049 /* more than a screenfull, don't scroll but redraw */
|
|
|
2050 else if (used > curwin->w_height)
|
|
|
2051 line_count = used;
|
|
|
2052 /* scroll minimal number of lines */
|
|
|
2053 else
|
|
|
2054 {
|
|
|
2055 line_count = 0;
|
|
|
2056 #ifdef FEAT_DIFF
|
|
|
2057 boff.fill = curwin->w_topfill;
|
|
|
2058 #endif
|
|
|
2059 boff.lnum = curwin->w_topline - 1;
|
|
|
2060 for (i = 0; i < scrolled && boff.lnum < curwin->w_botline; )
|
|
|
2061 {
|
|
|
2062 botline_forw(&boff);
|
|
|
2063 i += boff.height;
|
|
|
2064 ++line_count;
|
|
|
2065 }
|
|
|
2066 if (i < scrolled) /* below curwin->w_botline, don't scroll */
|
|
|
2067 line_count = 9999;
|
|
|
2068 }
|
|
|
2069
|
|
|
2070 /*
|
|
|
2071 * Scroll up if the cursor is off the bottom of the screen a bit.
|
|
|
2072 * Otherwise put it at 1/2 of the screen.
|
|
|
2073 */
|
|
|
2074 if (line_count >= curwin->w_height && line_count > min_scroll)
|
|
|
2075 scroll_cursor_halfway(FALSE);
|
|
|
2076 else
|
|
|
2077 scrollup(line_count, TRUE);
|
|
|
2078
|
|
|
2079 /*
|
|
|
2080 * If topline didn't change we need to restore w_botline and w_empty_rows
|
|
|
2081 * (we changed them).
|
|
|
2082 * If topline did change, update_screen() will set botline.
|
|
|
2083 */
|
|
|
2084 if (curwin->w_topline == old_topline && set_topbot)
|
|
|
2085 {
|
|
|
2086 curwin->w_botline = old_botline;
|
|
|
2087 curwin->w_empty_rows = old_empty_rows;
|
|
|
2088 curwin->w_valid = old_valid;
|
|
|
2089 }
|
|
|
2090 curwin->w_valid |= VALID_TOPLINE;
|
|
|
2091 }
|
|
|
2092
|
|
|
2093 /*
|
|
|
2094 * Recompute topline to put the cursor halfway the window
|
|
|
2095 * If "atend" is TRUE, also put it halfway at the end of the file.
|
|
|
2096 */
|
|
|
2097 void
|
|
|
2098 scroll_cursor_halfway(atend)
|
|
|
2099 int atend;
|
|
|
2100 {
|
|
|
2101 int above = 0;
|
|
|
2102 linenr_T topline;
|
|
|
2103 #ifdef FEAT_DIFF
|
|
|
2104 int topfill = 0;
|
|
|
2105 #endif
|
|
|
2106 int below = 0;
|
|
|
2107 int used;
|
|
|
2108 lineoff_T loff;
|
|
|
2109 lineoff_T boff;
|
|
|
2110
|
|
|
2111 loff.lnum = boff.lnum = curwin->w_cursor.lnum;
|
|
|
2112 #ifdef FEAT_FOLDING
|
|
|
2113 (void)hasFolding(loff.lnum, &loff.lnum, &boff.lnum);
|
|
|
2114 #endif
|
|
|
2115 #ifdef FEAT_DIFF
|
|
|
2116 used = plines_nofill(loff.lnum);
|
|
|
2117 loff.fill = 0;
|
|
|
2118 boff.fill = 0;
|
|
|
2119 #else
|
|
|
2120 used = plines(loff.lnum);
|
|
|
2121 #endif
|
|
|
2122 topline = loff.lnum;
|
|
|
2123 while (topline > 1)
|
|
|
2124 {
|
|
|
2125 if (below <= above) /* add a line below the cursor first */
|
|
|
2126 {
|
|
|
2127 if (boff.lnum < curbuf->b_ml.ml_line_count)
|
|
|
2128 {
|
|
|
2129 botline_forw(&boff);
|
|
|
2130 used += boff.height;
|
|
|
2131 if (used > curwin->w_height)
|
|
|
2132 break;
|
|
|
2133 below += boff.height;
|
|
|
2134 }
|
|
|
2135 else
|
|
|
2136 {
|
|
|
2137 ++below; /* count a "~" line */
|
|
|
2138 if (atend)
|
|
|
2139 ++used;
|
|
|
2140 }
|
|
|
2141 }
|
|
|
2142
|
|
|
2143 if (below > above) /* add a line above the cursor */
|
|
|
2144 {
|
|
|
2145 topline_back(&loff);
|
|
|
2146 used += loff.height;
|
|
|
2147 if (used > curwin->w_height)
|
|
|
2148 break;
|
|
|
2149 above += loff.height;
|
|
|
2150 topline = loff.lnum;
|
|
|
2151 #ifdef FEAT_DIFF
|
|
|
2152 topfill = loff.fill;
|
|
|
2153 #endif
|
|
|
2154 }
|
|
|
2155 }
|
|
|
2156 #ifdef FEAT_FOLDING
|
|
|
2157 if (!hasFolding(topline, &curwin->w_topline, NULL))
|
|
|
2158 #endif
|
|
|
2159 curwin->w_topline = topline;
|
|
|
2160 #ifdef FEAT_DIFF
|
|
|
2161 curwin->w_topfill = topfill;
|
|
|
2162 check_topfill(curwin, FALSE);
|
|
|
2163 #endif
|
|
|
2164 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
|
2165 curwin->w_valid |= VALID_TOPLINE;
|
|
|
2166 }
|
|
|
2167
|
|
|
2168 /*
|
|
|
2169 * Correct the cursor position so that it is in a part of the screen at least
|
|
|
2170 * 'so' lines from the top and bottom, if possible.
|
|
|
2171 * If not possible, put it at the same position as scroll_cursor_halfway().
|
|
|
2172 * When called topline must be valid!
|
|
|
2173 */
|
|
|
2174 void
|
|
|
2175 cursor_correct()
|
|
|
2176 {
|
|
|
2177 int above = 0; /* screen lines above topline */
|
|
|
2178 linenr_T topline;
|
|
|
2179 int below = 0; /* screen lines below botline */
|
|
|
2180 linenr_T botline;
|
|
|
2181 int above_wanted, below_wanted;
|
|
|
2182 linenr_T cln; /* Cursor Line Number */
|
|
|
2183 int max_off;
|
|
|
2184
|
|
|
2185 /*
|
|
|
2186 * How many lines we would like to have above/below the cursor depends on
|
|
|
2187 * whether the first/last line of the file is on screen.
|
|
|
2188 */
|
|
|
2189 above_wanted = p_so;
|
|
|
2190 below_wanted = p_so;
|
|
|
2191 #ifdef FEAT_MOUSE
|
|
|
2192 if (mouse_dragging)
|
|
|
2193 {
|
|
|
2194 above_wanted = mouse_dragging - 1;
|
|
|
2195 below_wanted = mouse_dragging - 1;
|
|
|
2196 }
|
|
|
2197 #endif
|
|
|
2198 if (curwin->w_topline == 1)
|
|
|
2199 {
|
|
|
2200 above_wanted = 0;
|
|
|
2201 max_off = curwin->w_height / 2;
|
|
|
2202 if (below_wanted > max_off)
|
|
|
2203 below_wanted = max_off;
|
|
|
2204 }
|
|
|
2205 validate_botline();
|
|
|
2206 if (curwin->w_botline == curbuf->b_ml.ml_line_count + 1
|
|
|
2207 #ifdef FEAT_MOUSE
|
|
|
2208 && !mouse_dragging
|
|
|
2209 #endif
|
|
|
2210 )
|
|
|
2211 {
|
|
|
2212 below_wanted = 0;
|
|
|
2213 max_off = (curwin->w_height - 1) / 2;
|
|
|
2214 if (above_wanted > max_off)
|
|
|
2215 above_wanted = max_off;
|
|
|
2216 }
|
|
|
2217
|
|
|
2218 /*
|
|
|
2219 * If there are sufficient file-lines above and below the cursor, we can
|
|
|
2220 * return now.
|
|
|
2221 */
|
|
|
2222 cln = curwin->w_cursor.lnum;
|
|
|
2223 if (cln >= curwin->w_topline + above_wanted
|
|
|
2224 && cln < curwin->w_botline - below_wanted
|
|
|
2225 #ifdef FEAT_FOLDING
|
|
|
2226 && !hasAnyFolding(curwin)
|
|
|
2227 #endif
|
|
|
2228 )
|
|
|
2229 return;
|
|
|
2230
|
|
|
2231 /*
|
|
|
2232 * Narrow down the area where the cursor can be put by taking lines from
|
|
|
2233 * the top and the bottom until:
|
|
|
2234 * - the desired context lines are found
|
|
|
2235 * - the lines from the top is past the lines from the bottom
|
|
|
2236 */
|
|
|
2237 topline = curwin->w_topline;
|
|
|
2238 botline = curwin->w_botline - 1;
|
|
|
2239 #ifdef FEAT_DIFF
|
|
|
2240 /* count filler lines as context */
|
|
|
2241 above = curwin->w_topfill;
|
|
|
2242 below = curwin->w_filler_rows;
|
|
|
2243 #endif
|
|
|
2244 while ((above < above_wanted || below < below_wanted) && topline < botline)
|
|
|
2245 {
|
|
|
2246 if (below < below_wanted && (below <= above || above >= above_wanted))
|
|
|
2247 {
|
|
|
2248 #ifdef FEAT_FOLDING
|
|
|
2249 if (hasFolding(botline, &botline, NULL))
|
|
|
2250 ++below;
|
|
|
2251 else
|
|
|
2252 #endif
|
|
|
2253 below += plines(botline);
|
|
|
2254 --botline;
|
|
|
2255 }
|
|
|
2256 if (above < above_wanted && (above < below || below >= below_wanted))
|
|
|
2257 {
|
|
|
2258 #ifdef FEAT_FOLDING
|
|
|
2259 if (hasFolding(topline, NULL, &topline))
|
|
|
2260 ++above;
|
|
|
2261 else
|
|
|
2262 #endif
|
|
|
2263 #ifndef FEAT_DIFF
|
|
|
2264 above += plines(topline);
|
|
|
2265 #else
|
|
|
2266 above += plines_nofill(topline);
|
|
|
2267
|
|
|
2268 /* Count filler lines below this line as context. */
|
|
|
2269 if (topline < botline)
|
|
|
2270 above += diff_check_fill(curwin, topline + 1);
|
|
|
2271 #endif
|
|
|
2272 ++topline;
|
|
|
2273 }
|
|
|
2274 }
|
|
|
2275 if (topline == botline || botline == 0)
|
|
|
2276 curwin->w_cursor.lnum = topline;
|
|
|
2277 else if (topline > botline)
|
|
|
2278 curwin->w_cursor.lnum = botline;
|
|
|
2279 else
|
|
|
2280 {
|
|
|
2281 if (cln < topline && curwin->w_topline > 1)
|
|
|
2282 {
|
|
|
2283 curwin->w_cursor.lnum = topline;
|
|
|
2284 curwin->w_valid &=
|
|
|
2285 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW);
|
|
|
2286 }
|
|
|
2287 if (cln > botline && curwin->w_botline <= curbuf->b_ml.ml_line_count)
|
|
|
2288 {
|
|
|
2289 curwin->w_cursor.lnum = botline;
|
|
|
2290 curwin->w_valid &=
|
|
|
2291 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW);
|
|
|
2292 }
|
|
|
2293 }
|
|
|
2294 curwin->w_valid |= VALID_TOPLINE;
|
|
|
2295 }
|
|
|
2296
|
|
|
2297 static void get_scroll_overlap __ARGS((lineoff_T *lp, int dir));
|
|
|
2298
|
|
|
2299 /*
|
|
|
2300 * move screen 'count' pages up or down and update screen
|
|
|
2301 *
|
|
|
2302 * return FAIL for failure, OK otherwise
|
|
|
2303 */
|
|
|
2304 int
|
|
|
2305 onepage(dir, count)
|
|
|
2306 int dir;
|
|
|
2307 long count;
|
|
|
2308 {
|
|
|
2309 long n;
|
|
|
2310 int retval = OK;
|
|
|
2311 lineoff_T loff;
|
|
|
2312 linenr_T old_topline = curwin->w_topline;
|
|
|
2313
|
|
|
2314 if (curbuf->b_ml.ml_line_count == 1) /* nothing to do */
|
|
|
2315 {
|
|
|
2316 beep_flush();
|
|
|
2317 return FAIL;
|
|
|
2318 }
|
|
|
2319
|
|
|
2320 for ( ; count > 0; --count)
|
|
|
2321 {
|
|
|
2322 validate_botline();
|
|
|
2323 /*
|
|
|
2324 * It's an error to move a page up when the first line is already on
|
|
|
2325 * the screen. It's an error to move a page down when the last line
|
|
|
2326 * is on the screen and the topline is 'scrolloff' lines from the
|
|
|
2327 * last line.
|
|
|
2328 */
|
|
|
2329 if (dir == FORWARD
|
|
|
2330 ? ((curwin->w_topline >= curbuf->b_ml.ml_line_count - p_so)
|
|
|
2331 && curwin->w_botline > curbuf->b_ml.ml_line_count)
|
|
|
2332 : (curwin->w_topline == 1
|
|
|
2333 #ifdef FEAT_DIFF
|
|
|
2334 && curwin->w_topfill ==
|
|
|
2335 diff_check_fill(curwin, curwin->w_topline)
|
|
|
2336 #endif
|
|
|
2337 ))
|
|
|
2338 {
|
|
|
2339 beep_flush();
|
|
|
2340 retval = FAIL;
|
|
|
2341 break;
|
|
|
2342 }
|
|
|
2343
|
|
|
2344 #ifdef FEAT_DIFF
|
|
|
2345 loff.fill = 0;
|
|
|
2346 #endif
|
|
|
2347 if (dir == FORWARD)
|
|
|
2348 {
|
|
164
|
2349 if (firstwin == lastwin && p_window > 0 && p_window < Rows - 1)
|
|
7
|
2350 {
|
|
164
|
2351 /* Vi compatible scrolling */
|
|
|
2352 if (p_window <= 2)
|
|
|
2353 ++curwin->w_topline;
|
|
|
2354 else
|
|
|
2355 curwin->w_topline += p_window - 2;
|
|
|
2356 if (curwin->w_topline > curbuf->b_ml.ml_line_count)
|
|
|
2357 curwin->w_topline = curbuf->b_ml.ml_line_count;
|
|
|
2358 curwin->w_cursor.lnum = curwin->w_topline;
|
|
|
2359 }
|
|
|
2360 else if (curwin->w_botline > curbuf->b_ml.ml_line_count)
|
|
|
2361 {
|
|
|
2362 /* at end of file */
|
|
7
|
2363 curwin->w_topline = curbuf->b_ml.ml_line_count;
|
|
|
2364 #ifdef FEAT_DIFF
|
|
|
2365 curwin->w_topfill = 0;
|
|
|
2366 #endif
|
|
|
2367 curwin->w_valid &= ~(VALID_WROW|VALID_CROW);
|
|
|
2368 }
|
|
|
2369 else
|
|
|
2370 {
|
|
|
2371 /* For the overlap, start with the line just below the window
|
|
|
2372 * and go upwards. */
|
|
|
2373 loff.lnum = curwin->w_botline;
|
|
|
2374 #ifdef FEAT_DIFF
|
|
|
2375 loff.fill = diff_check_fill(curwin, loff.lnum)
|
|
|
2376 - curwin->w_filler_rows;
|
|
|
2377 #endif
|
|
|
2378 get_scroll_overlap(&loff, -1);
|
|
|
2379 curwin->w_topline = loff.lnum;
|
|
|
2380 #ifdef FEAT_DIFF
|
|
|
2381 curwin->w_topfill = loff.fill;
|
|
|
2382 check_topfill(curwin, FALSE);
|
|
|
2383 #endif
|
|
|
2384 curwin->w_cursor.lnum = curwin->w_topline;
|
|
|
2385 curwin->w_valid &= ~(VALID_WCOL|VALID_CHEIGHT|VALID_WROW|
|
|
|
2386 VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
|
2387 }
|
|
|
2388 }
|
|
|
2389 else /* dir == BACKWARDS */
|
|
|
2390 {
|
|
|
2391 #ifdef FEAT_DIFF
|
|
|
2392 if (curwin->w_topline == 1)
|
|
|
2393 {
|
|
|
2394 /* Include max number of filler lines */
|
|
|
2395 max_topfill();
|
|
|
2396 continue;
|
|
|
2397 }
|
|
|
2398 #endif
|
|
164
|
2399 if (firstwin == lastwin && p_window > 0 && p_window < Rows - 1)
|
|
|
2400 {
|
|
|
2401 /* Vi compatible scrolling (sort of) */
|
|
|
2402 if (p_window <= 2)
|
|
|
2403 --curwin->w_topline;
|
|
|
2404 else
|
|
|
2405 curwin->w_topline -= p_window - 2;
|
|
|
2406 if (curwin->w_topline < 1)
|
|
|
2407 curwin->w_topline = 1;
|
|
|
2408 curwin->w_cursor.lnum = curwin->w_topline + p_window - 1;
|
|
|
2409 if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
|
|
|
2410 curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
|
|
|
2411 continue;
|
|
|
2412 }
|
|
|
2413
|
|
7
|
2414 /* Find the line at the top of the window that is going to be the
|
|
|
2415 * line at the bottom of the window. Make sure this results in
|
|
|
2416 * the same line as before doing CTRL-F. */
|
|
|
2417 loff.lnum = curwin->w_topline - 1;
|
|
|
2418 #ifdef FEAT_DIFF
|
|
|
2419 loff.fill = diff_check_fill(curwin, loff.lnum + 1)
|
|
|
2420 - curwin->w_topfill;
|
|
|
2421 #endif
|
|
|
2422 get_scroll_overlap(&loff, 1);
|
|
|
2423
|
|
|
2424 if (loff.lnum >= curbuf->b_ml.ml_line_count)
|
|
|
2425 {
|
|
|
2426 loff.lnum = curbuf->b_ml.ml_line_count;
|
|
|
2427 #ifdef FEAT_DIFF
|
|
|
2428 loff.fill = 0;
|
|
|
2429 }
|
|
|
2430 else
|
|
|
2431 {
|
|
|
2432 botline_topline(&loff);
|
|
|
2433 #endif
|
|
|
2434 }
|
|
|
2435 curwin->w_cursor.lnum = loff.lnum;
|
|
|
2436
|
|
|
2437 /* Find the line just above the new topline to get the right line
|
|
|
2438 * at the bottom of the window. */
|
|
|
2439 n = 0;
|
|
|
2440 while (n <= curwin->w_height && loff.lnum >= 1)
|
|
|
2441 {
|
|
|
2442 topline_back(&loff);
|
|
|
2443 n += loff.height;
|
|
|
2444 }
|
|
|
2445 if (n <= curwin->w_height) /* at begin of file */
|
|
|
2446 {
|
|
|
2447 curwin->w_topline = 1;
|
|
|
2448 #ifdef FEAT_DIFF
|
|
|
2449 max_topfill();
|
|
|
2450 #endif
|
|
|
2451 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
|
2452 }
|
|
|
2453 else
|
|
|
2454 {
|
|
|
2455 /* Go two lines forward again. */
|
|
|
2456 #ifdef FEAT_DIFF
|
|
|
2457 topline_botline(&loff);
|
|
|
2458 #endif
|
|
|
2459 botline_forw(&loff);
|
|
|
2460 botline_forw(&loff);
|
|
|
2461 #ifdef FEAT_DIFF
|
|
|
2462 botline_topline(&loff);
|
|
|
2463 #endif
|
|
|
2464 #ifdef FEAT_FOLDING
|
|
|
2465 /* We're at the wrong end of a fold now. */
|
|
|
2466 (void)hasFolding(loff.lnum, &loff.lnum, NULL);
|
|
|
2467 #endif
|
|
|
2468
|
|
|
2469 /* Always scroll at least one line. Avoid getting stuck on
|
|
|
2470 * very long lines. */
|
|
|
2471 if (loff.lnum >= curwin->w_topline
|
|
|
2472 #ifdef FEAT_DIFF
|
|
|
2473 && (loff.lnum > curwin->w_topline
|
|
|
2474 || loff.fill >= curwin->w_topfill)
|
|
|
2475 #endif
|
|
|
2476 )
|
|
|
2477 {
|
|
|
2478 #ifdef FEAT_DIFF
|
|
|
2479 /* First try using the maximum number of filler lines. If
|
|
|
2480 * that's not enough, backup one line. */
|
|
|
2481 loff.fill = curwin->w_topfill;
|
|
|
2482 if (curwin->w_topfill < diff_check_fill(curwin,
|
|
|
2483 curwin->w_topline))
|
|
|
2484 max_topfill();
|
|
|
2485 if (curwin->w_topfill == loff.fill)
|
|
|
2486 #endif
|
|
|
2487 {
|
|
|
2488 --curwin->w_topline;
|
|
|
2489 #ifdef FEAT_DIFF
|
|
|
2490 curwin->w_topfill = 0;
|
|
|
2491 #endif
|
|
|
2492 }
|
|
|
2493 comp_botline(curwin);
|
|
|
2494 curwin->w_cursor.lnum = curwin->w_botline - 1;
|
|
|
2495 curwin->w_valid &= ~(VALID_WCOL|VALID_CHEIGHT|
|
|
|
2496 VALID_WROW|VALID_CROW);
|
|
|
2497 }
|
|
|
2498 else
|
|
|
2499 {
|
|
|
2500 curwin->w_topline = loff.lnum;
|
|
|
2501 #ifdef FEAT_DIFF
|
|
|
2502 curwin->w_topfill = loff.fill;
|
|
|
2503 check_topfill(curwin, FALSE);
|
|
|
2504 #endif
|
|
|
2505 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
|
2506 }
|
|
|
2507 }
|
|
|
2508 }
|
|
|
2509 }
|
|
|
2510 #ifdef FEAT_FOLDING
|
|
|
2511 foldAdjustCursor();
|
|
|
2512 #endif
|
|
|
2513 cursor_correct();
|
|
161
|
2514 if (retval == OK)
|
|
|
2515 beginline(BL_SOL | BL_FIX);
|
|
7
|
2516 curwin->w_valid &= ~(VALID_WCOL|VALID_WROW|VALID_VIRTCOL);
|
|
|
2517
|
|
|
2518 /*
|
|
|
2519 * Avoid the screen jumping up and down when 'scrolloff' is non-zero.
|
|
|
2520 * But make sure we scroll at least one line (happens with mix of long
|
|
|
2521 * wrapping lines and non-wrapping line).
|
|
|
2522 */
|
|
|
2523 if (retval == OK && dir == FORWARD && check_top_offset())
|
|
|
2524 {
|
|
|
2525 scroll_cursor_top(1, FALSE);
|
|
|
2526 if (curwin->w_topline <= old_topline
|
|
|
2527 && old_topline < curbuf->b_ml.ml_line_count)
|
|
|
2528 {
|
|
|
2529 curwin->w_topline = old_topline + 1;
|
|
|
2530 #ifdef FEAT_FOLDING
|
|
|
2531 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
|
2532 #endif
|
|
|
2533 }
|
|
|
2534 }
|
|
|
2535
|
|
|
2536 redraw_later(VALID);
|
|
|
2537 return retval;
|
|
|
2538 }
|
|
|
2539
|
|
|
2540 /*
|
|
|
2541 * Decide how much overlap to use for page-up or page-down scrolling.
|
|
|
2542 * This is symmetric, so that doing both keeps the same lines displayed.
|
|
|
2543 * Three lines are examined:
|
|
|
2544 *
|
|
|
2545 * before CTRL-F after CTRL-F / before CTRL-B
|
|
|
2546 * etc. l1
|
|
|
2547 * l1 last but one line ------------
|
|
|
2548 * l2 last text line l2 top text line
|
|
|
2549 * ------------- l3 second text line
|
|
|
2550 * l3 etc.
|
|
|
2551 */
|
|
|
2552 static void
|
|
|
2553 get_scroll_overlap(lp, dir)
|
|
|
2554 lineoff_T *lp;
|
|
|
2555 int dir;
|
|
|
2556 {
|
|
|
2557 int h1, h2, h3, h4;
|
|
|
2558 int min_height = curwin->w_height - 2;
|
|
|
2559 lineoff_T loff0, loff1, loff2;
|
|
|
2560
|
|
|
2561 #ifdef FEAT_DIFF
|
|
|
2562 if (lp->fill > 0)
|
|
|
2563 lp->height = 1;
|
|
|
2564 else
|
|
|
2565 lp->height = plines_nofill(lp->lnum);
|
|
|
2566 #else
|
|
|
2567 lp->height = plines(lp->lnum);
|
|
|
2568 #endif
|
|
|
2569 h1 = lp->height;
|
|
|
2570 if (h1 > min_height)
|
|
|
2571 return; /* no overlap */
|
|
|
2572
|
|
|
2573 loff0 = *lp;
|
|
|
2574 if (dir > 0)
|
|
|
2575 botline_forw(lp);
|
|
|
2576 else
|
|
|
2577 topline_back(lp);
|
|
|
2578 h2 = lp->height;
|
|
|
2579 if (h2 + h1 > min_height)
|
|
|
2580 {
|
|
|
2581 *lp = loff0; /* no overlap */
|
|
|
2582 return;
|
|
|
2583 }
|
|
|
2584
|
|
|
2585 loff1 = *lp;
|
|
|
2586 if (dir > 0)
|
|
|
2587 botline_forw(lp);
|
|
|
2588 else
|
|
|
2589 topline_back(lp);
|
|
|
2590 h3 = lp->height;
|
|
|
2591 if (h3 + h2 > min_height)
|
|
|
2592 {
|
|
|
2593 *lp = loff0; /* no overlap */
|
|
|
2594 return;
|
|
|
2595 }
|
|
|
2596
|
|
|
2597 loff2 = *lp;
|
|
|
2598 if (dir > 0)
|
|
|
2599 botline_forw(lp);
|
|
|
2600 else
|
|
|
2601 topline_back(lp);
|
|
|
2602 h4 = lp->height;
|
|
|
2603 if (h4 + h3 + h2 > min_height || h3 + h2 + h1 > min_height)
|
|
|
2604 *lp = loff1; /* 1 line overlap */
|
|
|
2605 else
|
|
|
2606 *lp = loff2; /* 2 lines overlap */
|
|
|
2607 return;
|
|
|
2608 }
|
|
|
2609
|
|
|
2610 /* #define KEEP_SCREEN_LINE */
|
|
|
2611 /*
|
|
|
2612 * Scroll 'scroll' lines up or down.
|
|
|
2613 */
|
|
|
2614 void
|
|
|
2615 halfpage(flag, Prenum)
|
|
|
2616 int flag;
|
|
|
2617 linenr_T Prenum;
|
|
|
2618 {
|
|
|
2619 long scrolled = 0;
|
|
|
2620 int i;
|
|
|
2621 int n;
|
|
|
2622 int room;
|
|
|
2623
|
|
|
2624 if (Prenum)
|
|
|
2625 curwin->w_p_scr = (Prenum > curwin->w_height) ?
|
|
|
2626 curwin->w_height : Prenum;
|
|
|
2627 n = (curwin->w_p_scr <= curwin->w_height) ?
|
|
|
2628 curwin->w_p_scr : curwin->w_height;
|
|
|
2629
|
|
|
2630 validate_botline();
|
|
|
2631 room = curwin->w_empty_rows;
|
|
|
2632 #ifdef FEAT_DIFF
|
|
|
2633 room += curwin->w_filler_rows;
|
|
|
2634 #endif
|
|
|
2635 if (flag)
|
|
|
2636 {
|
|
|
2637 /*
|
|
|
2638 * scroll the text up
|
|
|
2639 */
|
|
|
2640 while (n > 0 && curwin->w_botline <= curbuf->b_ml.ml_line_count)
|
|
|
2641 {
|
|
|
2642 #ifdef FEAT_DIFF
|
|
|
2643 if (curwin->w_topfill > 0)
|
|
|
2644 {
|
|
|
2645 i = 1;
|
|
|
2646 if (--n < 0 && scrolled > 0)
|
|
|
2647 break;
|
|
|
2648 --curwin->w_topfill;
|
|
|
2649 }
|
|
|
2650 else
|
|
|
2651 #endif
|
|
|
2652 {
|
|
|
2653 #ifdef FEAT_DIFF
|
|
|
2654 i = plines_nofill(curwin->w_topline);
|
|
|
2655 #else
|
|
|
2656 i = plines(curwin->w_topline);
|
|
|
2657 #endif
|
|
|
2658 n -= i;
|
|
|
2659 if (n < 0 && scrolled > 0)
|
|
|
2660 break;
|
|
|
2661 #ifdef FEAT_FOLDING
|
|
|
2662 (void)hasFolding(curwin->w_topline, NULL, &curwin->w_topline);
|
|
|
2663 #endif
|
|
|
2664 ++curwin->w_topline;
|
|
|
2665 #ifdef FEAT_DIFF
|
|
|
2666 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline);
|
|
|
2667 #endif
|
|
|
2668
|
|
|
2669 #ifndef KEEP_SCREEN_LINE
|
|
|
2670 if (curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)
|
|
|
2671 {
|
|
|
2672 ++curwin->w_cursor.lnum;
|
|
|
2673 curwin->w_valid &=
|
|
|
2674 ~(VALID_VIRTCOL|VALID_CHEIGHT|VALID_WCOL);
|
|
|
2675 }
|
|
|
2676 #endif
|
|
|
2677 }
|
|
|
2678 curwin->w_valid &= ~(VALID_CROW|VALID_WROW);
|
|
|
2679 scrolled += i;
|
|
|
2680
|
|
|
2681 /*
|
|
|
2682 * Correct w_botline for changed w_topline.
|
|
|
2683 * Won't work when there are filler lines.
|
|
|
2684 */
|
|
|
2685 #ifdef FEAT_DIFF
|
|
|
2686 if (curwin->w_p_diff)
|
|
|
2687 curwin->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
|
2688 else
|
|
|
2689 #endif
|
|
|
2690 {
|
|
|
2691 room += i;
|
|
|
2692 do
|
|
|
2693 {
|
|
|
2694 i = plines(curwin->w_botline);
|
|
|
2695 if (i > room)
|
|
|
2696 break;
|
|
|
2697 #ifdef FEAT_FOLDING
|
|
|
2698 (void)hasFolding(curwin->w_botline, NULL,
|
|
|
2699 &curwin->w_botline);
|
|
|
2700 #endif
|
|
|
2701 ++curwin->w_botline;
|
|
|
2702 room -= i;
|
|
|
2703 } while (curwin->w_botline <= curbuf->b_ml.ml_line_count);
|
|
|
2704 }
|
|
|
2705 }
|
|
|
2706
|
|
|
2707 #ifndef KEEP_SCREEN_LINE
|
|
|
2708 /*
|
|
|
2709 * When hit bottom of the file: move cursor down.
|
|
|
2710 */
|
|
|
2711 if (n > 0)
|
|
|
2712 {
|
|
|
2713 # ifdef FEAT_FOLDING
|
|
|
2714 if (hasAnyFolding(curwin))
|
|
|
2715 {
|
|
|
2716 while (--n >= 0
|
|
|
2717 && curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)
|
|
|
2718 {
|
|
|
2719 (void)hasFolding(curwin->w_cursor.lnum, NULL,
|
|
|
2720 &curwin->w_cursor.lnum);
|
|
|
2721 ++curwin->w_cursor.lnum;
|
|
|
2722 }
|
|
|
2723 }
|
|
|
2724 else
|
|
|
2725 # endif
|
|
|
2726 curwin->w_cursor.lnum += n;
|
|
|
2727 check_cursor_lnum();
|
|
|
2728 }
|
|
|
2729 #else
|
|
|
2730 /* try to put the cursor in the same screen line */
|
|
|
2731 while ((curwin->w_cursor.lnum < curwin->w_topline || scrolled > 0)
|
|
|
2732 && curwin->w_cursor.lnum < curwin->w_botline - 1)
|
|
|
2733 {
|
|
|
2734 scrolled -= plines(curwin->w_cursor.lnum);
|
|
|
2735 if (scrolled < 0 && curwin->w_cursor.lnum >= curwin->w_topline)
|
|
|
2736 break;
|
|
|
2737 # ifdef FEAT_FOLDING
|
|
|
2738 (void)hasFolding(curwin->w_cursor.lnum, NULL,
|
|
|
2739 &curwin->w_cursor.lnum);
|
|
|
2740 # endif
|
|
|
2741 ++curwin->w_cursor.lnum;
|
|
|
2742 }
|
|
|
2743 #endif
|
|
|
2744 }
|
|
|
2745 else
|
|
|
2746 {
|
|
|
2747 /*
|
|
|
2748 * scroll the text down
|
|
|
2749 */
|
|
|
2750 while (n > 0 && curwin->w_topline > 1)
|
|
|
2751 {
|
|
|
2752 #ifdef FEAT_DIFF
|
|
|
2753 if (curwin->w_topfill < diff_check_fill(curwin, curwin->w_topline))
|
|
|
2754 {
|
|
|
2755 i = 1;
|
|
|
2756 if (--n < 0 && scrolled > 0)
|
|
|
2757 break;
|
|
|
2758 ++curwin->w_topfill;
|
|
|
2759 }
|
|
|
2760 else
|
|
|
2761 #endif
|
|
|
2762 {
|
|
|
2763 #ifdef FEAT_DIFF
|
|
|
2764 i = plines_nofill(curwin->w_topline - 1);
|
|
|
2765 #else
|
|
|
2766 i = plines(curwin->w_topline - 1);
|
|
|
2767 #endif
|
|
|
2768 n -= i;
|
|
|
2769 if (n < 0 && scrolled > 0)
|
|
|
2770 break;
|
|
|
2771 --curwin->w_topline;
|
|
|
2772 #ifdef FEAT_FOLDING
|
|
|
2773 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
|
2774 #endif
|
|
|
2775 #ifdef FEAT_DIFF
|
|
|
2776 curwin->w_topfill = 0;
|
|
|
2777 #endif
|
|
|
2778 }
|
|
|
2779 curwin->w_valid &= ~(VALID_CROW|VALID_WROW|
|
|
|
2780 VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
|
2781 scrolled += i;
|
|
|
2782 #ifndef KEEP_SCREEN_LINE
|
|
|
2783 if (curwin->w_cursor.lnum > 1)
|
|
|
2784 {
|
|
|
2785 --curwin->w_cursor.lnum;
|
|
|
2786 curwin->w_valid &= ~(VALID_VIRTCOL|VALID_CHEIGHT|VALID_WCOL);
|
|
|
2787 }
|
|
|
2788 #endif
|
|
|
2789 }
|
|
|
2790 #ifndef KEEP_SCREEN_LINE
|
|
|
2791 /*
|
|
|
2792 * When hit top of the file: move cursor up.
|
|
|
2793 */
|
|
|
2794 if (n > 0)
|
|
|
2795 {
|
|
|
2796 if (curwin->w_cursor.lnum <= (linenr_T)n)
|
|
|
2797 curwin->w_cursor.lnum = 1;
|
|
|
2798 else
|
|
|
2799 # ifdef FEAT_FOLDING
|
|
|
2800 if (hasAnyFolding(curwin))
|
|
|
2801 {
|
|
|
2802 while (--n >= 0 && curwin->w_cursor.lnum > 1)
|
|
|
2803 {
|
|
|
2804 --curwin->w_cursor.lnum;
|
|
|
2805 (void)hasFolding(curwin->w_cursor.lnum,
|
|
|
2806 &curwin->w_cursor.lnum, NULL);
|
|
|
2807 }
|
|
|
2808 }
|
|
|
2809 else
|
|
|
2810 # endif
|
|
|
2811 curwin->w_cursor.lnum -= n;
|
|
|
2812 }
|
|
|
2813 #else
|
|
|
2814 /* try to put the cursor in the same screen line */
|
|
|
2815 scrolled += n; /* move cursor when topline is 1 */
|
|
|
2816 while (curwin->w_cursor.lnum > curwin->w_topline
|
|
|
2817 && (scrolled > 0 || curwin->w_cursor.lnum >= curwin->w_botline))
|
|
|
2818 {
|
|
|
2819 scrolled -= plines(curwin->w_cursor.lnum - 1);
|
|
|
2820 if (scrolled < 0 && curwin->w_cursor.lnum < curwin->w_botline)
|
|
|
2821 break;
|
|
|
2822 --curwin->w_cursor.lnum;
|
|
|
2823 # ifdef FEAT_FOLDING
|
|
|
2824 foldAdjustCursor();
|
|
|
2825 # endif
|
|
|
2826 }
|
|
|
2827 #endif
|
|
|
2828 }
|
|
|
2829 # ifdef FEAT_FOLDING
|
|
|
2830 /* Move cursor to first line of closed fold. */
|
|
|
2831 foldAdjustCursor();
|
|
|
2832 # endif
|
|
|
2833 #ifdef FEAT_DIFF
|
|
|
2834 check_topfill(curwin, !flag);
|
|
|
2835 #endif
|
|
|
2836 cursor_correct();
|
|
|
2837 beginline(BL_SOL | BL_FIX);
|
|
|
2838 redraw_later(VALID);
|
|
|
2839 }
|
