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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1121
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169 if (mouse_dragging > 0)
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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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1744
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283 if (curwin->w_cursor.lnum < curwin->w_botline)
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284 {
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285 if (((long)curwin->w_cursor.lnum
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7
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286 >= (long)curwin->w_botline - p_so
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287 #ifdef FEAT_FOLDING
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288 || hasAnyFolding(curwin)
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289 #endif
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290 ))
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1744
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291 {
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7
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292 lineoff_T loff;
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293
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1744
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294 /* Cursor is (a few lines) above botline, check if there are
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295 * 'scrolloff' window lines below the cursor. If not, need to
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296 * scroll. */
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7
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297 n = curwin->w_empty_rows;
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298 loff.lnum = curwin->w_cursor.lnum;
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299 #ifdef FEAT_FOLDING
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300 /* In a fold go to its last line. */
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301 (void)hasFolding(loff.lnum, NULL, &loff.lnum);
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302 #endif
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303 #ifdef FEAT_DIFF
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304 loff.fill = 0;
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305 n += curwin->w_filler_rows;
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306 #endif
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307 loff.height = 0;
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308 while (loff.lnum < curwin->w_botline
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309 #ifdef FEAT_DIFF
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310 && (loff.lnum + 1 < curwin->w_botline || loff.fill == 0)
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311 #endif
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312 )
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313 {
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314 n += loff.height;
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315 if (n >= p_so)
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316 break;
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317 botline_forw(&loff);
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318 }
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319 if (n >= p_so)
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320 /* sufficient context, no need to scroll */
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321 check_botline = FALSE;
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1744
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322 }
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323 else
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324 /* sufficient context, no need to scroll */
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325 check_botline = FALSE;
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7
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326 }
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327 if (check_botline)
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328 {
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329 #ifdef FEAT_FOLDING
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330 if (hasAnyFolding(curwin))
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331 {
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332 /* Count the number of logical lines between the cursor and
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333 * botline - p_so (approximation of how much will be
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334 * scrolled). */
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335 line_count = 0;
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336 for (lnum = curwin->w_cursor.lnum;
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337 lnum >= curwin->w_botline - p_so; --lnum)
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338 {
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339 ++line_count;
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340 /* stop at end of file or when we know we are far off */
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341 if (lnum <= 0 || line_count > curwin->w_height + 1)
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342 break;
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343 (void)hasFolding(lnum, &lnum, NULL);
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344 }
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345 }
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346 else
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347 #endif
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348 line_count = curwin->w_cursor.lnum - curwin->w_botline
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349 + 1 + p_so;
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350 if (line_count <= curwin->w_height + 1)
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532
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351 scroll_cursor_bot(scrolljump_value(), FALSE);
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7
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352 else
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353 scroll_cursor_halfway(FALSE);
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354 }
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355 }
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356 }
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357 curwin->w_valid |= VALID_TOPLINE;
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358
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359 /*
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360 * Need to redraw when topline changed.
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361 */
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362 if (curwin->w_topline != old_topline
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363 #ifdef FEAT_DIFF
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364 || curwin->w_topfill != old_topfill
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365 #endif
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366 )
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367 {
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368 dollar_vcol = 0;
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740
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369 if (curwin->w_skipcol != 0)
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7
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370 {
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371 curwin->w_skipcol = 0;
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372 redraw_later(NOT_VALID);
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373 }
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374 else
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375 redraw_later(VALID);
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376 /* May need to set w_skipcol when cursor in w_topline. */
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377 if (curwin->w_cursor.lnum == curwin->w_topline)
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378 validate_cursor();
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379 }
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380
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381 #ifdef FEAT_MOUSE
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382 p_so = save_so;
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383 #endif
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384 }
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385
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386 /*
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532
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387 * Return the scrolljump value to use for the current window.
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388 * When 'scrolljump' is positive use it as-is.
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389 * When 'scrolljump' is negative use it as a percentage of the window height.
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390 */
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391 static int
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392 scrolljump_value()
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393 {
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394 if (p_sj >= 0)
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395 return (int)p_sj;
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396 return (curwin->w_height * -p_sj) / 100;
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397 }
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398
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399 /*
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7
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400 * Return TRUE when there are not 'scrolloff' lines above the cursor for the
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401 * current window.
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402 */
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403 static int
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404 check_top_offset()
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405 {
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406 lineoff_T loff;
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407 int n;
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408
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409 if (curwin->w_cursor.lnum < curwin->w_topline + p_so
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410 #ifdef FEAT_FOLDING
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411 || hasAnyFolding(curwin)
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412 #endif
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413 )
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414 {
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415 loff.lnum = curwin->w_cursor.lnum;
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416 #ifdef FEAT_DIFF
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417 loff.fill = 0;
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418 n = curwin->w_topfill; /* always have this context */
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419 #else
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420 n = 0;
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421 #endif
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422 /* Count the visible screen lines above the cursor line. */
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423 while (n < p_so)
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424 {
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425 topline_back(&loff);
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426 /* Stop when included a line above the window. */
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427 if (loff.lnum < curwin->w_topline
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428 #ifdef FEAT_DIFF
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429 || (loff.lnum == curwin->w_topline && loff.fill > 0)
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430 #endif
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431 )
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432 break;
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433 n += loff.height;
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434 }
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435 if (n < p_so)
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436 return TRUE;
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437 }
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438 return FALSE;
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439 }
|
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440
|
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441 void
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442 update_curswant()
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443 {
|
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444 if (curwin->w_set_curswant)
|
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445 {
|
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446 validate_virtcol();
|
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447 curwin->w_curswant = curwin->w_virtcol;
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448 curwin->w_set_curswant = FALSE;
|
|
449 }
|
|
450 }
|
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451
|
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452 /*
|
|
453 * Check if the cursor has moved. Set the w_valid flag accordingly.
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454 */
|
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455 void
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456 check_cursor_moved(wp)
|
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457 win_T *wp;
|
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458 {
|
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459 if (wp->w_cursor.lnum != wp->w_valid_cursor.lnum)
|
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460 {
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461 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL
|
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462 |VALID_CHEIGHT|VALID_CROW|VALID_TOPLINE);
|
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463 wp->w_valid_cursor = wp->w_cursor;
|
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464 wp->w_valid_leftcol = wp->w_leftcol;
|
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465 }
|
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466 else if (wp->w_cursor.col != wp->w_valid_cursor.col
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467 || wp->w_leftcol != wp->w_valid_leftcol
|
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468 #ifdef FEAT_VIRTUALEDIT
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469 || wp->w_cursor.coladd != wp->w_valid_cursor.coladd
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|
470 #endif
|
|
471 )
|
|
472 {
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473 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL);
|
|
474 wp->w_valid_cursor.col = wp->w_cursor.col;
|
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475 wp->w_valid_leftcol = wp->w_leftcol;
|
|
476 #ifdef FEAT_VIRTUALEDIT
|
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477 wp->w_valid_cursor.coladd = wp->w_cursor.coladd;
|
|
478 #endif
|
|
479 }
|
|
480 }
|
|
481
|
|
482 /*
|
|
483 * Call this function when some window settings have changed, which require
|
|
484 * the cursor position, botline and topline to be recomputed and the window to
|
|
485 * be redrawn. E.g, when changing the 'wrap' option or folding.
|
|
486 */
|
|
487 void
|
|
488 changed_window_setting()
|
|
489 {
|
|
490 changed_window_setting_win(curwin);
|
|
491 }
|
|
492
|
|
493 void
|
|
494 changed_window_setting_win(wp)
|
|
495 win_T *wp;
|
|
496 {
|
|
497 wp->w_lines_valid = 0;
|
|
498 changed_line_abv_curs_win(wp);
|
|
499 wp->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP|VALID_TOPLINE);
|
|
500 redraw_win_later(wp, NOT_VALID);
|
|
501 }
|
|
502
|
|
503 /*
|
|
504 * Set wp->w_topline to a certain number.
|
|
505 */
|
|
506 void
|
|
507 set_topline(wp, lnum)
|
|
508 win_T *wp;
|
|
509 linenr_T lnum;
|
|
510 {
|
|
511 #ifdef FEAT_FOLDING
|
|
512 /* go to first of folded lines */
|
|
513 (void)hasFoldingWin(wp, lnum, &lnum, NULL, TRUE, NULL);
|
|
514 #endif
|
|
515 /* Approximate the value of w_botline */
|
|
516 wp->w_botline += lnum - wp->w_topline;
|
|
517 wp->w_topline = lnum;
|
1744
|
518 #ifdef FEAT_AUTOCMD
|
|
519 wp->w_topline_was_set = TRUE;
|
|
520 #endif
|
7
|
521 #ifdef FEAT_DIFF
|
|
522 wp->w_topfill = 0;
|
|
523 #endif
|
|
524 wp->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_TOPLINE);
|
|
525 /* Don't set VALID_TOPLINE here, 'scrolloff' needs to be checked. */
|
|
526 redraw_later(VALID);
|
|
527 }
|
|
528
|
|
529 /*
|
|
530 * Call this function when the length of the cursor line (in screen
|
|
531 * characters) has changed, and the change is before the cursor.
|
|
532 * Need to take care of w_botline separately!
|
|
533 */
|
|
534 void
|
|
535 changed_cline_bef_curs()
|
|
536 {
|
|
537 curwin->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL
|
|
538 |VALID_CHEIGHT|VALID_TOPLINE);
|
|
539 }
|
|
540
|
|
541 void
|
|
542 changed_cline_bef_curs_win(wp)
|
|
543 win_T *wp;
|
|
544 {
|
|
545 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL
|
|
546 |VALID_CHEIGHT|VALID_TOPLINE);
|
|
547 }
|
|
548
|
|
549 #if 0 /* not used */
|
|
550 /*
|
|
551 * Call this function when the length of the cursor line (in screen
|
|
552 * characters) has changed, and the position of the cursor doesn't change.
|
|
553 * Need to take care of w_botline separately!
|
|
554 */
|
|
555 void
|
|
556 changed_cline_aft_curs()
|
|
557 {
|
|
558 curwin->w_valid &= ~VALID_CHEIGHT;
|
|
559 }
|
|
560 #endif
|
|
561
|
|
562 /*
|
|
563 * Call this function when the length of a line (in screen characters) above
|
|
564 * the cursor have changed.
|
|
565 * Need to take care of w_botline separately!
|
|
566 */
|
|
567 void
|
|
568 changed_line_abv_curs()
|
|
569 {
|
|
570 curwin->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL|VALID_CROW
|
|
571 |VALID_CHEIGHT|VALID_TOPLINE);
|
|
572 }
|
|
573
|
|
574 void
|
|
575 changed_line_abv_curs_win(wp)
|
|
576 win_T *wp;
|
|
577 {
|
|
578 wp->w_valid &= ~(VALID_WROW|VALID_WCOL|VALID_VIRTCOL|VALID_CROW
|
|
579 |VALID_CHEIGHT|VALID_TOPLINE);
|
|
580 }
|
|
581
|
|
582 /*
|
|
583 * Make sure the value of curwin->w_botline is valid.
|
|
584 */
|
|
585 void
|
|
586 validate_botline()
|
|
587 {
|
|
588 if (!(curwin->w_valid & VALID_BOTLINE))
|
|
589 comp_botline(curwin);
|
|
590 }
|
|
591
|
|
592 /*
|
|
593 * Make sure the value of wp->w_botline is valid.
|
|
594 */
|
|
595 static void
|
|
596 validate_botline_win(wp)
|
|
597 win_T *wp;
|
|
598 {
|
|
599 if (!(wp->w_valid & VALID_BOTLINE))
|
|
600 comp_botline(wp);
|
|
601 }
|
|
602
|
|
603 /*
|
|
604 * Mark curwin->w_botline as invalid (because of some change in the buffer).
|
|
605 */
|
|
606 void
|
|
607 invalidate_botline()
|
|
608 {
|
|
609 curwin->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
610 }
|
|
611
|
|
612 void
|
|
613 invalidate_botline_win(wp)
|
|
614 win_T *wp;
|
|
615 {
|
|
616 wp->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
617 }
|
|
618
|
|
619 #if 0 /* never used */
|
|
620 /*
|
|
621 * Mark curwin->w_botline as approximated (because of some small change in the
|
|
622 * buffer).
|
|
623 */
|
|
624 void
|
|
625 approximate_botline()
|
|
626 {
|
|
627 curwin->w_valid &= ~VALID_BOTLINE;
|
|
628 }
|
|
629 #endif
|
|
630
|
|
631 void
|
|
632 approximate_botline_win(wp)
|
|
633 win_T *wp;
|
|
634 {
|
|
635 wp->w_valid &= ~VALID_BOTLINE;
|
|
636 }
|
|
637
|
|
638 #if 0 /* not used */
|
|
639 /*
|
|
640 * Return TRUE if curwin->w_botline is valid.
|
|
641 */
|
|
642 int
|
|
643 botline_valid()
|
|
644 {
|
|
645 return (curwin->w_valid & VALID_BOTLINE);
|
|
646 }
|
|
647 #endif
|
|
648
|
|
649 #if 0 /* not used */
|
|
650 /*
|
|
651 * Return TRUE if curwin->w_botline is valid or approximated.
|
|
652 */
|
|
653 int
|
|
654 botline_approximated()
|
|
655 {
|
|
656 return (curwin->w_valid & VALID_BOTLINE_AP);
|
|
657 }
|
|
658 #endif
|
|
659
|
|
660 /*
|
|
661 * Return TRUE if curwin->w_wrow and curwin->w_wcol are valid.
|
|
662 */
|
|
663 int
|
|
664 cursor_valid()
|
|
665 {
|
|
666 check_cursor_moved(curwin);
|
|
667 return ((curwin->w_valid & (VALID_WROW|VALID_WCOL)) ==
|
|
668 (VALID_WROW|VALID_WCOL));
|
|
669 }
|
|
670
|
|
671 /*
|
|
672 * Validate cursor position. Makes sure w_wrow and w_wcol are valid.
|
|
673 * w_topline must be valid, you may need to call update_topline() first!
|
|
674 */
|
|
675 void
|
|
676 validate_cursor()
|
|
677 {
|
|
678 check_cursor_moved(curwin);
|
|
679 if ((curwin->w_valid & (VALID_WCOL|VALID_WROW)) != (VALID_WCOL|VALID_WROW))
|
|
680 curs_columns(TRUE);
|
|
681 }
|
|
682
|
|
683 #if defined(FEAT_GUI) || defined(PROTO)
|
|
684 /*
|
|
685 * validate w_cline_row.
|
|
686 */
|
|
687 void
|
|
688 validate_cline_row()
|
|
689 {
|
|
690 /*
|
|
691 * First make sure that w_topline is valid (after moving the cursor).
|
|
692 */
|
|
693 update_topline();
|
|
694 check_cursor_moved(curwin);
|
|
695 if (!(curwin->w_valid & VALID_CROW))
|
|
696 curs_rows(curwin, FALSE);
|
|
697 }
|
|
698 #endif
|
|
699
|
|
700 /*
|
|
701 * Compute wp->w_cline_row and wp->w_cline_height, based on the current value
|
|
702 * of wp->w_topine.
|
|
703 *
|
|
704 * Returns OK when cursor is in the window, FAIL when it isn't.
|
|
705 */
|
|
706 static void
|
|
707 curs_rows(wp, do_botline)
|
|
708 win_T *wp;
|
|
709 int do_botline; /* also compute w_botline */
|
|
710 {
|
|
711 linenr_T lnum;
|
|
712 int i;
|
|
713 int all_invalid;
|
|
714 int valid;
|
|
715 #ifdef FEAT_FOLDING
|
|
716 long fold_count;
|
|
717 #endif
|
|
718
|
|
719 /* Check if wp->w_lines[].wl_size is invalid */
|
|
720 all_invalid = (!redrawing()
|
|
721 || wp->w_lines_valid == 0
|
|
722 || wp->w_lines[0].wl_lnum > wp->w_topline);
|
|
723 i = 0;
|
|
724 wp->w_cline_row = 0;
|
|
725 for (lnum = wp->w_topline; lnum < wp->w_cursor.lnum; ++i)
|
|
726 {
|
|
727 valid = FALSE;
|
|
728 if (!all_invalid && i < wp->w_lines_valid)
|
|
729 {
|
|
730 if (wp->w_lines[i].wl_lnum < lnum || !wp->w_lines[i].wl_valid)
|
|
731 continue; /* skip changed or deleted lines */
|
|
732 if (wp->w_lines[i].wl_lnum == lnum)
|
|
733 {
|
|
734 #ifdef FEAT_FOLDING
|
|
735 /* Check for newly inserted lines below this row, in which
|
|
736 * case we need to check for folded lines. */
|
|
737 if (!wp->w_buffer->b_mod_set
|
|
738 || wp->w_lines[i].wl_lastlnum < wp->w_cursor.lnum
|
|
739 || wp->w_buffer->b_mod_top
|
|
740 > wp->w_lines[i].wl_lastlnum + 1)
|
|
741 #endif
|
|
742 valid = TRUE;
|
|
743 }
|
|
744 else if (wp->w_lines[i].wl_lnum > lnum)
|
|
745 --i; /* hold at inserted lines */
|
|
746 }
|
|
747 if (valid
|
|
748 #ifdef FEAT_DIFF
|
|
749 && (lnum != wp->w_topline || !wp->w_p_diff)
|
|
750 #endif
|
|
751 )
|
|
752 {
|
|
753 #ifdef FEAT_FOLDING
|
|
754 lnum = wp->w_lines[i].wl_lastlnum + 1;
|
|
755 /* Cursor inside folded lines, don't count this row */
|
|
756 if (lnum > wp->w_cursor.lnum)
|
|
757 break;
|
|
758 #else
|
|
759 ++lnum;
|
|
760 #endif
|
|
761 wp->w_cline_row += wp->w_lines[i].wl_size;
|
|
762 }
|
|
763 else
|
|
764 {
|
|
765 #ifdef FEAT_FOLDING
|
|
766 fold_count = foldedCount(wp, lnum, NULL);
|
|
767 if (fold_count)
|
|
768 {
|
|
769 lnum += fold_count;
|
|
770 if (lnum > wp->w_cursor.lnum)
|
|
771 break;
|
|
772 ++wp->w_cline_row;
|
|
773 }
|
|
774 else
|
|
775 #endif
|
|
776 #ifdef FEAT_DIFF
|
|
777 if (lnum == wp->w_topline)
|
|
778 wp->w_cline_row += plines_win_nofill(wp, lnum++, TRUE)
|
|
779 + wp->w_topfill;
|
|
780 else
|
|
781 #endif
|
|
782 wp->w_cline_row += plines_win(wp, lnum++, TRUE);
|
|
783 }
|
|
784 }
|
|
785
|
|
786 check_cursor_moved(wp);
|
|
787 if (!(wp->w_valid & VALID_CHEIGHT))
|
|
788 {
|
|
789 if (all_invalid
|
|
790 || i == wp->w_lines_valid
|
|
791 || (i < wp->w_lines_valid
|
|
792 && (!wp->w_lines[i].wl_valid
|
|
793 || wp->w_lines[i].wl_lnum != wp->w_cursor.lnum)))
|
|
794 {
|
|
795 #ifdef FEAT_DIFF
|
|
796 if (wp->w_cursor.lnum == wp->w_topline)
|
|
797 wp->w_cline_height = plines_win_nofill(wp, wp->w_cursor.lnum,
|
|
798 TRUE) + wp->w_topfill;
|
|
799 else
|
|
800 #endif
|
|
801 wp->w_cline_height = plines_win(wp, wp->w_cursor.lnum, TRUE);
|
|
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 if (i > wp->w_lines_valid)
|
|
808 {
|
|
809 /* a line that is too long to fit on the last screen line */
|
|
810 wp->w_cline_height = 0;
|
|
811 #ifdef FEAT_FOLDING
|
|
812 wp->w_cline_folded = hasFoldingWin(wp, wp->w_cursor.lnum,
|
|
813 NULL, NULL, TRUE, NULL);
|
|
814 #endif
|
|
815 }
|
|
816 else
|
|
817 {
|
|
818 wp->w_cline_height = wp->w_lines[i].wl_size;
|
|
819 #ifdef FEAT_FOLDING
|
|
820 wp->w_cline_folded = wp->w_lines[i].wl_folded;
|
|
821 #endif
|
|
822 }
|
|
823 }
|
|
824
|
|
825 wp->w_valid |= VALID_CROW|VALID_CHEIGHT;
|
|
826
|
|
827 /* validate botline too, if update_screen doesn't do it */
|
|
828 if (do_botline && all_invalid)
|
|
829 validate_botline_win(wp);
|
|
830 }
|
|
831
|
|
832 /*
|
|
833 * Validate curwin->w_virtcol only.
|
|
834 */
|
|
835 void
|
|
836 validate_virtcol()
|
|
837 {
|
|
838 validate_virtcol_win(curwin);
|
|
839 }
|
|
840
|
|
841 /*
|
|
842 * Validate wp->w_virtcol only.
|
|
843 */
|
|
844 void
|
|
845 validate_virtcol_win(wp)
|
|
846 win_T *wp;
|
|
847 {
|
|
848 check_cursor_moved(wp);
|
|
849 if (!(wp->w_valid & VALID_VIRTCOL))
|
|
850 {
|
|
851 getvvcol(wp, &wp->w_cursor, NULL, &(wp->w_virtcol), NULL);
|
|
852 wp->w_valid |= VALID_VIRTCOL;
|
740
|
853 #ifdef FEAT_SYN_HL
|
752
|
854 if (wp->w_p_cuc
|
|
855 # ifdef FEAT_INS_EXPAND
|
|
856 && !pum_visible()
|
|
857 # endif
|
|
858 )
|
740
|
859 redraw_win_later(wp, SOME_VALID);
|
|
860 #endif
|
7
|
861 }
|
|
862 }
|
|
863
|
|
864 /*
|
|
865 * Validate curwin->w_cline_height only.
|
|
866 */
|
|
867 static void
|
|
868 validate_cheight()
|
|
869 {
|
|
870 check_cursor_moved(curwin);
|
|
871 if (!(curwin->w_valid & VALID_CHEIGHT))
|
|
872 {
|
|
873 #ifdef FEAT_DIFF
|
|
874 if (curwin->w_cursor.lnum == curwin->w_topline)
|
|
875 curwin->w_cline_height = plines_nofill(curwin->w_cursor.lnum)
|
|
876 + curwin->w_topfill;
|
|
877 else
|
|
878 #endif
|
|
879 curwin->w_cline_height = plines(curwin->w_cursor.lnum);
|
|
880 #ifdef FEAT_FOLDING
|
|
881 curwin->w_cline_folded = hasFolding(curwin->w_cursor.lnum, NULL, NULL);
|
|
882 #endif
|
|
883 curwin->w_valid |= VALID_CHEIGHT;
|
|
884 }
|
|
885 }
|
|
886
|
|
887 /*
|
1668
|
888 * Validate w_wcol and w_virtcol only.
|
7
|
889 */
|
|
890 void
|
|
891 validate_cursor_col()
|
|
892 {
|
|
893 colnr_T off;
|
|
894 colnr_T col;
|
|
895
|
|
896 validate_virtcol();
|
|
897 if (!(curwin->w_valid & VALID_WCOL))
|
|
898 {
|
|
899 col = curwin->w_virtcol;
|
|
900 off = curwin_col_off();
|
|
901 col += off;
|
|
902
|
|
903 /* long line wrapping, adjust curwin->w_wrow */
|
1668
|
904 if (curwin->w_p_wrap
|
|
905 && col >= (colnr_T)W_WIDTH(curwin)
|
119
|
906 && W_WIDTH(curwin) - off + curwin_col_off2() > 0)
|
7
|
907 {
|
|
908 col -= W_WIDTH(curwin);
|
|
909 col = col % (W_WIDTH(curwin) - off + curwin_col_off2());
|
|
910 }
|
1668
|
911 if (col > (int)curwin->w_leftcol)
|
|
912 col -= curwin->w_leftcol;
|
|
913 else
|
|
914 col = 0;
|
7
|
915 curwin->w_wcol = col;
|
1668
|
916
|
7
|
917 curwin->w_valid |= VALID_WCOL;
|
|
918 }
|
|
919 }
|
|
920
|
|
921 /*
|
|
922 * Compute offset of a window, occupied by line number, fold column and sign
|
|
923 * column (these don't move when scrolling horizontally).
|
|
924 */
|
|
925 int
|
|
926 win_col_off(wp)
|
|
927 win_T *wp;
|
|
928 {
|
13
|
929 return ((wp->w_p_nu ? number_width(wp) + 1 : 0)
|
7
|
930 #ifdef FEAT_CMDWIN
|
|
931 + (cmdwin_type == 0 || wp != curwin ? 0 : 1)
|
|
932 #endif
|
|
933 #ifdef FEAT_FOLDING
|
|
934 + wp->w_p_fdc
|
|
935 #endif
|
|
936 #ifdef FEAT_SIGNS
|
|
937 + (
|
|
938 # ifdef FEAT_NETBEANS_INTG
|
|
939 /* always show glyph gutter in netbeans */
|
|
940 usingNetbeans ||
|
|
941 # endif
|
|
942 wp->w_buffer->b_signlist != NULL ? 2 : 0)
|
|
943 #endif
|
|
944 );
|
|
945 }
|
|
946
|
|
947 int
|
|
948 curwin_col_off()
|
|
949 {
|
|
950 return win_col_off(curwin);
|
|
951 }
|
|
952
|
|
953 /*
|
|
954 * Return the difference in column offset for the second screen line of a
|
|
955 * wrapped line. It's 8 if 'number' is on and 'n' is in 'cpoptions'.
|
|
956 */
|
|
957 int
|
|
958 win_col_off2(wp)
|
|
959 win_T *wp;
|
|
960 {
|
|
961 if (wp->w_p_nu && vim_strchr(p_cpo, CPO_NUMCOL) != NULL)
|
13
|
962 return number_width(wp) + 1;
|
7
|
963 return 0;
|
|
964 }
|
|
965
|
|
966 int
|
|
967 curwin_col_off2()
|
|
968 {
|
|
969 return win_col_off2(curwin);
|
|
970 }
|
|
971
|
|
972 /*
|
|
973 * compute curwin->w_wcol and curwin->w_virtcol.
|
|
974 * Also updates curwin->w_wrow and curwin->w_cline_row.
|
|
975 * Also updates curwin->w_leftcol.
|
|
976 */
|
|
977 void
|
|
978 curs_columns(scroll)
|
|
979 int scroll; /* when TRUE, may scroll horizontally */
|
|
980 {
|
|
981 int diff;
|
|
982 int extra; /* offset for first screen line */
|
|
983 int off_left, off_right;
|
|
984 int n;
|
|
985 int p_lines;
|
|
986 int width = 0;
|
|
987 int textwidth;
|
|
988 int new_leftcol;
|
|
989 colnr_T startcol;
|
|
990 colnr_T endcol;
|
|
991 colnr_T prev_skipcol;
|
|
992
|
|
993 /*
|
|
994 * First make sure that w_topline is valid (after moving the cursor).
|
|
995 */
|
|
996 update_topline();
|
|
997
|
|
998 /*
|
|
999 * Next make sure that w_cline_row is valid.
|
|
1000 */
|
|
1001 if (!(curwin->w_valid & VALID_CROW))
|
|
1002 curs_rows(curwin, FALSE);
|
|
1003
|
|
1004 /*
|
|
1005 * Compute the number of virtual columns.
|
|
1006 */
|
|
1007 #ifdef FEAT_FOLDING
|
|
1008 if (curwin->w_cline_folded)
|
|
1009 /* In a folded line the cursor is always in the first column */
|
|
1010 startcol = curwin->w_virtcol = endcol = curwin->w_leftcol;
|
|
1011 else
|
|
1012 #endif
|
|
1013 getvvcol(curwin, &curwin->w_cursor,
|
|
1014 &startcol, &(curwin->w_virtcol), &endcol);
|
|
1015
|
|
1016 /* remove '$' from change command when cursor moves onto it */
|
|
1017 if (startcol > dollar_vcol)
|
|
1018 dollar_vcol = 0;
|
|
1019
|
|
1020 extra = curwin_col_off();
|
|
1021 curwin->w_wcol = curwin->w_virtcol + extra;
|
|
1022 endcol += extra;
|
|
1023
|
|
1024 /*
|
|
1025 * Now compute w_wrow, counting screen lines from w_cline_row.
|
|
1026 */
|
|
1027 curwin->w_wrow = curwin->w_cline_row;
|
|
1028
|
|
1029 textwidth = W_WIDTH(curwin) - extra;
|
|
1030 if (textwidth <= 0)
|
|
1031 {
|
|
1032 /* No room for text, put cursor in last char of window. */
|
|
1033 curwin->w_wcol = W_WIDTH(curwin) - 1;
|
|
1034 curwin->w_wrow = curwin->w_height - 1;
|
|
1035 }
|
|
1036 else if (curwin->w_p_wrap
|
|
1037 #ifdef FEAT_VERTSPLIT
|
|
1038 && curwin->w_width != 0
|
|
1039 #endif
|
|
1040 )
|
|
1041 {
|
|
1042 width = textwidth + curwin_col_off2();
|
|
1043
|
|
1044 /* long line wrapping, adjust curwin->w_wrow */
|
|
1045 if (curwin->w_wcol >= W_WIDTH(curwin))
|
|
1046 {
|
|
1047 n = (curwin->w_wcol - W_WIDTH(curwin)) / width + 1;
|
|
1048 curwin->w_wcol -= n * width;
|
|
1049 curwin->w_wrow += n;
|
|
1050
|
|
1051 #ifdef FEAT_LINEBREAK
|
|
1052 /* When cursor wraps to first char of next line in Insert
|
|
1053 * mode, the 'showbreak' string isn't shown, backup to first
|
|
1054 * column */
|
|
1055 if (*p_sbr && *ml_get_cursor() == NUL
|
|
1056 && curwin->w_wcol == (int)vim_strsize(p_sbr))
|
|
1057 curwin->w_wcol = 0;
|
|
1058 #endif
|
|
1059 }
|
|
1060 }
|
|
1061
|
|
1062 /* No line wrapping: compute curwin->w_leftcol if scrolling is on and line
|
|
1063 * is not folded.
|
|
1064 * If scrolling is off, curwin->w_leftcol is assumed to be 0 */
|
|
1065 else if (scroll
|
|
1066 #ifdef FEAT_FOLDING
|
|
1067 && !curwin->w_cline_folded
|
|
1068 #endif
|
|
1069 )
|
|
1070 {
|
|
1071 /*
|
|
1072 * If Cursor is left of the screen, scroll rightwards.
|
|
1073 * If Cursor is right of the screen, scroll leftwards
|
|
1074 * If we get closer to the edge than 'sidescrolloff', scroll a little
|
|
1075 * extra
|
|
1076 */
|
|
1077 off_left = (int)startcol - (int)curwin->w_leftcol - p_siso;
|
|
1078 off_right = (int)endcol - (int)(curwin->w_leftcol + W_WIDTH(curwin)
|
|
1079 - p_siso) + 1;
|
|
1080 if (off_left < 0 || off_right > 0)
|
|
1081 {
|
|
1082 if (off_left < 0)
|
|
1083 diff = -off_left;
|
|
1084 else
|
|
1085 diff = off_right;
|
|
1086
|
|
1087 /* When far off or not enough room on either side, put cursor in
|
|
1088 * middle of window. */
|
|
1089 if (p_ss == 0 || diff >= textwidth / 2 || off_right >= off_left)
|
|
1090 new_leftcol = curwin->w_wcol - extra - textwidth / 2;
|
|
1091 else
|
|
1092 {
|
|
1093 if (diff < p_ss)
|
|
1094 diff = p_ss;
|
|
1095 if (off_left < 0)
|
|
1096 new_leftcol = curwin->w_leftcol - diff;
|
|
1097 else
|
|
1098 new_leftcol = curwin->w_leftcol + diff;
|
|
1099 }
|
|
1100 if (new_leftcol < 0)
|
|
1101 new_leftcol = 0;
|
|
1102 if (new_leftcol != (int)curwin->w_leftcol)
|
|
1103 {
|
|
1104 curwin->w_leftcol = new_leftcol;
|
|
1105 /* screen has to be redrawn with new curwin->w_leftcol */
|
|
1106 redraw_later(NOT_VALID);
|
|
1107 }
|
|
1108 }
|
|
1109 curwin->w_wcol -= curwin->w_leftcol;
|
|
1110 }
|
|
1111 else if (curwin->w_wcol > (int)curwin->w_leftcol)
|
|
1112 curwin->w_wcol -= curwin->w_leftcol;
|
|
1113 else
|
|
1114 curwin->w_wcol = 0;
|
|
1115
|
|
1116 #ifdef FEAT_DIFF
|
|
1117 /* Skip over filler lines. At the top use w_topfill, there
|
|
1118 * may be some filler lines above the window. */
|
|
1119 if (curwin->w_cursor.lnum == curwin->w_topline)
|
|
1120 curwin->w_wrow += curwin->w_topfill;
|
|
1121 else
|
|
1122 curwin->w_wrow += diff_check_fill(curwin, curwin->w_cursor.lnum);
|
|
1123 #endif
|
|
1124
|
|
1125 prev_skipcol = curwin->w_skipcol;
|
|
1126
|
|
1127 p_lines = 0;
|
|
1128 if ((curwin->w_wrow >= curwin->w_height
|
|
1129 || ((prev_skipcol > 0
|
|
1130 || curwin->w_wrow + p_so >= curwin->w_height)
|
|
1131 && (p_lines =
|
|
1132 #ifdef FEAT_DIFF
|
|
1133 plines_win_nofill
|
|
1134 #else
|
|
1135 plines_win
|
|
1136 #endif
|
|
1137 (curwin, curwin->w_cursor.lnum, FALSE))
|
|
1138 - 1 >= curwin->w_height))
|
|
1139 && curwin->w_height != 0
|
|
1140 && curwin->w_cursor.lnum == curwin->w_topline
|
|
1141 && width > 0
|
|
1142 #ifdef FEAT_VERTSPLIT
|
|
1143 && curwin->w_width != 0
|
|
1144 #endif
|
|
1145 )
|
|
1146 {
|
|
1147 /* Cursor past end of screen. Happens with a single line that does
|
|
1148 * not fit on screen. Find a skipcol to show the text around the
|
|
1149 * cursor. Avoid scrolling all the time. compute value of "extra":
|
|
1150 * 1: Less than "p_so" lines above
|
|
1151 * 2: Less than "p_so" lines below
|
|
1152 * 3: both of them */
|
|
1153 extra = 0;
|
|
1154 if (curwin->w_skipcol + p_so * width > curwin->w_virtcol)
|
|
1155 extra = 1;
|
|
1156 /* Compute last display line of the buffer line that we want at the
|
|
1157 * bottom of the window. */
|
|
1158 if (p_lines == 0)
|
|
1159 p_lines = plines_win(curwin, curwin->w_cursor.lnum, FALSE);
|
|
1160 --p_lines;
|
|
1161 if (p_lines > curwin->w_wrow + p_so)
|
|
1162 n = curwin->w_wrow + p_so;
|
|
1163 else
|
|
1164 n = p_lines;
|
|
1165 if ((colnr_T)n >= curwin->w_height + curwin->w_skipcol / width)
|
|
1166 extra += 2;
|
|
1167
|
|
1168 if (extra == 3 || p_lines < p_so * 2)
|
|
1169 {
|
|
1170 /* not enough room for 'scrolloff', put cursor in the middle */
|
|
1171 n = curwin->w_virtcol / width;
|
|
1172 if (n > curwin->w_height / 2)
|
|
1173 n -= curwin->w_height / 2;
|
|
1174 else
|
|
1175 n = 0;
|
|
1176 /* don't skip more than necessary */
|
|
1177 if (n > p_lines - curwin->w_height + 1)
|
|
1178 n = p_lines - curwin->w_height + 1;
|
|
1179 curwin->w_skipcol = n * width;
|
|
1180 }
|
|
1181 else if (extra == 1)
|
|
1182 {
|
|
1183 /* less then 'scrolloff' lines above, decrease skipcol */
|
|
1184 extra = (curwin->w_skipcol + p_so * width - curwin->w_virtcol
|
|
1185 + width - 1) / width;
|
|
1186 if (extra > 0)
|
|
1187 {
|
|
1188 if ((colnr_T)(extra * width) > curwin->w_skipcol)
|
|
1189 extra = curwin->w_skipcol / width;
|
|
1190 curwin->w_skipcol -= extra * width;
|
|
1191 }
|
|
1192 }
|
|
1193 else if (extra == 2)
|
|
1194 {
|
|
1195 /* less then 'scrolloff' lines below, increase skipcol */
|
|
1196 endcol = (n - curwin->w_height + 1) * width;
|
|
1197 while (endcol > curwin->w_virtcol)
|
|
1198 endcol -= width;
|
|
1199 if (endcol > curwin->w_skipcol)
|
|
1200 curwin->w_skipcol = endcol;
|
|
1201 }
|
|
1202
|
|
1203 curwin->w_wrow -= curwin->w_skipcol / width;
|
|
1204 if (curwin->w_wrow >= curwin->w_height)
|
|
1205 {
|
|
1206 /* small window, make sure cursor is in it */
|
|
1207 extra = curwin->w_wrow - curwin->w_height + 1;
|
|
1208 curwin->w_skipcol += extra * width;
|
|
1209 curwin->w_wrow -= extra;
|
|
1210 }
|
|
1211
|
|
1212 extra = ((int)prev_skipcol - (int)curwin->w_skipcol) / width;
|
|
1213 if (extra > 0)
|
|
1214 win_ins_lines(curwin, 0, extra, FALSE, FALSE);
|
|
1215 else if (extra < 0)
|
|
1216 win_del_lines(curwin, 0, -extra, FALSE, FALSE);
|
|
1217 }
|
|
1218 else
|
|
1219 curwin->w_skipcol = 0;
|
|
1220 if (prev_skipcol != curwin->w_skipcol)
|
|
1221 redraw_later(NOT_VALID);
|
|
1222
|
740
|
1223 #ifdef FEAT_SYN_HL
|
|
1224 /* Redraw when w_virtcol changes and 'cursorcolumn' is set, or when w_row
|
|
1225 * changes and 'cursorline' is set. */
|
752
|
1226 if (((curwin->w_p_cuc && (curwin->w_valid & VALID_VIRTCOL) == 0)
|
|
1227 || (curwin->w_p_cul && (curwin->w_valid & VALID_WROW) == 0))
|
|
1228 # ifdef FEAT_INS_EXPAND
|
|
1229 && !pum_visible()
|
|
1230 # endif
|
|
1231 )
|
740
|
1232 redraw_later(SOME_VALID);
|
|
1233 #endif
|
|
1234
|
7
|
1235 curwin->w_valid |= VALID_WCOL|VALID_WROW|VALID_VIRTCOL;
|
|
1236 }
|
|
1237
|
|
1238 /*
|
|
1239 * Scroll the current window down by "line_count" logical lines. "CTRL-Y"
|
|
1240 */
|
|
1241 void
|
|
1242 scrolldown(line_count, byfold)
|
|
1243 long line_count;
|
1877
|
1244 int byfold UNUSED; /* TRUE: count a closed fold as one line */
|
7
|
1245 {
|
|
1246 long done = 0; /* total # of physical lines done */
|
|
1247 int wrow;
|
|
1248 int moved = FALSE;
|
|
1249
|
|
1250 #ifdef FEAT_FOLDING
|
|
1251 linenr_T first;
|
|
1252
|
|
1253 /* Make sure w_topline is at the first of a sequence of folded lines. */
|
|
1254 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
1255 #endif
|
|
1256 validate_cursor(); /* w_wrow needs to be valid */
|
|
1257 while (line_count-- > 0)
|
|
1258 {
|
|
1259 #ifdef FEAT_DIFF
|
|
1260 if (curwin->w_topfill < diff_check(curwin, curwin->w_topline))
|
|
1261 {
|
|
1262 ++curwin->w_topfill;
|
|
1263 ++done;
|
|
1264 }
|
|
1265 else
|
|
1266 #endif
|
|
1267 {
|
|
1268 if (curwin->w_topline == 1)
|
|
1269 break;
|
|
1270 --curwin->w_topline;
|
|
1271 #ifdef FEAT_DIFF
|
|
1272 curwin->w_topfill = 0;
|
|
1273 #endif
|
|
1274 #ifdef FEAT_FOLDING
|
|
1275 /* A sequence of folded lines only counts for one logical line */
|
|
1276 if (hasFolding(curwin->w_topline, &first, NULL))
|
|
1277 {
|
|
1278 ++done;
|
|
1279 if (!byfold)
|
|
1280 line_count -= curwin->w_topline - first - 1;
|
|
1281 curwin->w_botline -= curwin->w_topline - first;
|
|
1282 curwin->w_topline = first;
|
|
1283 }
|
|
1284 else
|
|
1285 #endif
|
|
1286 #ifdef FEAT_DIFF
|
|
1287 done += plines_nofill(curwin->w_topline);
|
|
1288 #else
|
|
1289 done += plines(curwin->w_topline);
|
|
1290 #endif
|
|
1291 }
|
|
1292 --curwin->w_botline; /* approximate w_botline */
|
|
1293 invalidate_botline();
|
|
1294 }
|
|
1295 curwin->w_wrow += done; /* keep w_wrow updated */
|
|
1296 curwin->w_cline_row += done; /* keep w_cline_row updated */
|
|
1297
|
|
1298 #ifdef FEAT_DIFF
|
|
1299 if (curwin->w_cursor.lnum == curwin->w_topline)
|
|
1300 curwin->w_cline_row = 0;
|
|
1301 check_topfill(curwin, TRUE);
|
|
1302 #endif
|
|
1303
|
|
1304 /*
|
|
1305 * Compute the row number of the last row of the cursor line
|
|
1306 * and move the cursor onto the displayed part of the window.
|
|
1307 */
|
|
1308 wrow = curwin->w_wrow;
|
|
1309 if (curwin->w_p_wrap
|
|
1310 #ifdef FEAT_VERTSPLIT
|
|
1311 && curwin->w_width != 0
|
|
1312 #endif
|
|
1313 )
|
|
1314 {
|
|
1315 validate_virtcol();
|
|
1316 validate_cheight();
|
|
1317 wrow += curwin->w_cline_height - 1 -
|
|
1318 curwin->w_virtcol / W_WIDTH(curwin);
|
|
1319 }
|
|
1320 while (wrow >= curwin->w_height && curwin->w_cursor.lnum > 1)
|
|
1321 {
|
|
1322 #ifdef FEAT_FOLDING
|
|
1323 if (hasFolding(curwin->w_cursor.lnum, &first, NULL))
|
|
1324 {
|
|
1325 --wrow;
|
|
1326 if (first == 1)
|
|
1327 curwin->w_cursor.lnum = 1;
|
|
1328 else
|
|
1329 curwin->w_cursor.lnum = first - 1;
|
|
1330 }
|
|
1331 else
|
|
1332 #endif
|
|
1333 wrow -= plines(curwin->w_cursor.lnum--);
|
|
1334 curwin->w_valid &=
|
|
1335 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW|VALID_VIRTCOL);
|
|
1336 moved = TRUE;
|
|
1337 }
|
|
1338 if (moved)
|
|
1339 {
|
|
1340 #ifdef FEAT_FOLDING
|
|
1341 /* Move cursor to first line of closed fold. */
|
|
1342 foldAdjustCursor();
|
|
1343 #endif
|
|
1344 coladvance(curwin->w_curswant);
|
|
1345 }
|
|
1346 }
|
|
1347
|
|
1348 /*
|
|
1349 * Scroll the current window up by "line_count" logical lines. "CTRL-E"
|
|
1350 */
|
|
1351 void
|
|
1352 scrollup(line_count, byfold)
|
|
1353 long line_count;
|
1877
|
1354 int byfold UNUSED; /* TRUE: count a closed fold as one line */
|
7
|
1355 {
|
|
1356 #if defined(FEAT_FOLDING) || defined(FEAT_DIFF)
|
|
1357 linenr_T lnum;
|
|
1358
|
|
1359 if (
|
|
1360 # ifdef FEAT_FOLDING
|
|
1361 (byfold && hasAnyFolding(curwin))
|
|
1362 # ifdef FEAT_DIFF
|
|
1363 ||
|
|
1364 # endif
|
|
1365 # endif
|
|
1366 # ifdef FEAT_DIFF
|
|
1367 curwin->w_p_diff
|
|
1368 # endif
|
|
1369 )
|
|
1370 {
|
|
1371 /* count each sequence of folded lines as one logical line */
|
|
1372 lnum = curwin->w_topline;
|
|
1373 while (line_count--)
|
|
1374 {
|
|
1375 # ifdef FEAT_DIFF
|
|
1376 if (curwin->w_topfill > 0)
|
|
1377 --curwin->w_topfill;
|
|
1378 else
|
|
1379 # endif
|
|
1380 {
|
|
1381 # ifdef FEAT_FOLDING
|
|
1382 if (byfold)
|
|
1383 (void)hasFolding(lnum, NULL, &lnum);
|
|
1384 # endif
|
|
1385 if (lnum >= curbuf->b_ml.ml_line_count)
|
|
1386 break;
|
|
1387 ++lnum;
|
|
1388 # ifdef FEAT_DIFF
|
|
1389 curwin->w_topfill = diff_check_fill(curwin, lnum);
|
|
1390 # endif
|
|
1391 }
|
|
1392 }
|
|
1393 /* approximate w_botline */
|
|
1394 curwin->w_botline += lnum - curwin->w_topline;
|
|
1395 curwin->w_topline = lnum;
|
|
1396 }
|
|
1397 else
|
|
1398 #endif
|
|
1399 {
|
|
1400 curwin->w_topline += line_count;
|
|
1401 curwin->w_botline += line_count; /* approximate w_botline */
|
|
1402 }
|
|
1403
|
|
1404 if (curwin->w_topline > curbuf->b_ml.ml_line_count)
|
|
1405 curwin->w_topline = curbuf->b_ml.ml_line_count;
|
|
1406 if (curwin->w_botline > curbuf->b_ml.ml_line_count + 1)
|
|
1407 curwin->w_botline = curbuf->b_ml.ml_line_count + 1;
|
|
1408
|
|
1409 #ifdef FEAT_DIFF
|
|
1410 check_topfill(curwin, FALSE);
|
|
1411 #endif
|
|
1412
|
|
1413 #ifdef FEAT_FOLDING
|
|
1414 if (hasAnyFolding(curwin))
|
|
1415 /* Make sure w_topline is at the first of a sequence of folded lines. */
|
|
1416 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
1417 #endif
|
|
1418
|
|
1419 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
1420 if (curwin->w_cursor.lnum < curwin->w_topline)
|
|
1421 {
|
|
1422 curwin->w_cursor.lnum = curwin->w_topline;
|
|
1423 curwin->w_valid &=
|
|
1424 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW|VALID_VIRTCOL);
|
|
1425 coladvance(curwin->w_curswant);
|
|
1426 }
|
|
1427 }
|
|
1428
|
|
1429 #ifdef FEAT_DIFF
|
|
1430 /*
|
|
1431 * Don't end up with too many filler lines in the window.
|
|
1432 */
|
|
1433 void
|
|
1434 check_topfill(wp, down)
|
|
1435 win_T *wp;
|
|
1436 int down; /* when TRUE scroll down when not enough space */
|
|
1437 {
|
|
1438 int n;
|
|
1439
|
|
1440 if (wp->w_topfill > 0)
|
|
1441 {
|
|
1442 n = plines_win_nofill(wp, wp->w_topline, TRUE);
|
|
1443 if (wp->w_topfill + n > wp->w_height)
|
|
1444 {
|
|
1445 if (down && wp->w_topline > 1)
|
|
1446 {
|
|
1447 --wp->w_topline;
|
|
1448 wp->w_topfill = 0;
|
|
1449 }
|
|
1450 else
|
|
1451 {
|
|
1452 wp->w_topfill = wp->w_height - n;
|
|
1453 if (wp->w_topfill < 0)
|
|
1454 wp->w_topfill = 0;
|
|
1455 }
|
|
1456 }
|
|
1457 }
|
|
1458 }
|
|
1459
|
|
1460 /*
|
|
1461 * Use as many filler lines as possible for w_topline. Make sure w_topline
|
|
1462 * is still visible.
|
|
1463 */
|
|
1464 static void
|
|
1465 max_topfill()
|
|
1466 {
|
|
1467 int n;
|
|
1468
|
|
1469 n = plines_nofill(curwin->w_topline);
|
|
1470 if (n >= curwin->w_height)
|
|
1471 curwin->w_topfill = 0;
|
|
1472 else
|
|
1473 {
|
|
1474 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline);
|
|
1475 if (curwin->w_topfill + n > curwin->w_height)
|
|
1476 curwin->w_topfill = curwin->w_height - n;
|
|
1477 }
|
|
1478 }
|
|
1479 #endif
|
|
1480
|
|
1481 #if defined(FEAT_INS_EXPAND) || defined(PROTO)
|
|
1482 /*
|
|
1483 * Scroll the screen one line down, but don't do it if it would move the
|
|
1484 * cursor off the screen.
|
|
1485 */
|
|
1486 void
|
|
1487 scrolldown_clamp()
|
|
1488 {
|
|
1489 int end_row;
|
|
1490 #ifdef FEAT_DIFF
|
|
1491 int can_fill = (curwin->w_topfill
|
|
1492 < diff_check_fill(curwin, curwin->w_topline));
|
|
1493 #endif
|
|
1494
|
|
1495 if (curwin->w_topline <= 1
|
|
1496 #ifdef FEAT_DIFF
|
|
1497 && !can_fill
|
|
1498 #endif
|
|
1499 )
|
|
1500 return;
|
|
1501
|
|
1502 validate_cursor(); /* w_wrow needs to be valid */
|
|
1503
|
|
1504 /*
|
|
1505 * Compute the row number of the last row of the cursor line
|
|
1506 * and make sure it doesn't go off the screen. Make sure the cursor
|
|
1507 * doesn't go past 'scrolloff' lines from the screen end.
|
|
1508 */
|
|
1509 end_row = curwin->w_wrow;
|
|
1510 #ifdef FEAT_DIFF
|
|
1511 if (can_fill)
|
|
1512 ++end_row;
|
|
1513 else
|
|
1514 end_row += plines_nofill(curwin->w_topline - 1);
|
|
1515 #else
|
|
1516 end_row += plines(curwin->w_topline - 1);
|
|
1517 #endif
|
|
1518 if (curwin->w_p_wrap
|
|
1519 #ifdef FEAT_VERTSPLIT
|
|
1520 && curwin->w_width != 0
|
|
1521 #endif
|
|
1522 )
|
|
1523 {
|
|
1524 validate_cheight();
|
|
1525 validate_virtcol();
|
|
1526 end_row += curwin->w_cline_height - 1 -
|
|
1527 curwin->w_virtcol / W_WIDTH(curwin);
|
|
1528 }
|
|
1529 if (end_row < curwin->w_height - p_so)
|
|
1530 {
|
|
1531 #ifdef FEAT_DIFF
|
|
1532 if (can_fill)
|
|
1533 {
|
|
1534 ++curwin->w_topfill;
|
|
1535 check_topfill(curwin, TRUE);
|
|
1536 }
|
|
1537 else
|
|
1538 {
|
|
1539 --curwin->w_topline;
|
|
1540 curwin->w_topfill = 0;
|
|
1541 }
|
|
1542 #else
|
|
1543 --curwin->w_topline;
|
|
1544 #endif
|
|
1545 #ifdef FEAT_FOLDING
|
|
1546 hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
1547 #endif
|
|
1548 --curwin->w_botline; /* approximate w_botline */
|
|
1549 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
1550 }
|
|
1551 }
|
|
1552
|
|
1553 /*
|
|
1554 * Scroll the screen one line up, but don't do it if it would move the cursor
|
|
1555 * off the screen.
|
|
1556 */
|
|
1557 void
|
|
1558 scrollup_clamp()
|
|
1559 {
|
|
1560 int start_row;
|
|
1561
|
|
1562 if (curwin->w_topline == curbuf->b_ml.ml_line_count
|
|
1563 #ifdef FEAT_DIFF
|
|
1564 && curwin->w_topfill == 0
|
|
1565 #endif
|
|
1566 )
|
|
1567 return;
|
|
1568
|
|
1569 validate_cursor(); /* w_wrow needs to be valid */
|
|
1570
|
|
1571 /*
|
|
1572 * Compute the row number of the first row of the cursor line
|
|
1573 * and make sure it doesn't go off the screen. Make sure the cursor
|
|
1574 * doesn't go before 'scrolloff' lines from the screen start.
|
|
1575 */
|
|
1576 #ifdef FEAT_DIFF
|
|
1577 start_row = curwin->w_wrow - plines_nofill(curwin->w_topline)
|
|
1578 - curwin->w_topfill;
|
|
1579 #else
|
|
1580 start_row = curwin->w_wrow - plines(curwin->w_topline);
|
|
1581 #endif
|
|
1582 if (curwin->w_p_wrap
|
|
1583 #ifdef FEAT_VERTSPLIT
|
|
1584 && curwin->w_width != 0
|
|
1585 #endif
|
|
1586 )
|
|
1587 {
|
|
1588 validate_virtcol();
|
|
1589 start_row -= curwin->w_virtcol / W_WIDTH(curwin);
|
|
1590 }
|
|
1591 if (start_row >= p_so)
|
|
1592 {
|
|
1593 #ifdef FEAT_DIFF
|
|
1594 if (curwin->w_topfill > 0)
|
|
1595 --curwin->w_topfill;
|
|
1596 else
|
|
1597 #endif
|
36
|
1598 {
|
|
1599 #ifdef FEAT_FOLDING
|
|
1600 (void)hasFolding(curwin->w_topline, NULL, &curwin->w_topline);
|
|
1601 #endif
|
7
|
1602 ++curwin->w_topline;
|
36
|
1603 }
|
7
|
1604 ++curwin->w_botline; /* approximate w_botline */
|
|
1605 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
1606 }
|
|
1607 }
|
|
1608 #endif /* FEAT_INS_EXPAND */
|
|
1609
|
|
1610 /*
|
|
1611 * Add one line above "lp->lnum". This can be a filler line, a closed fold or
|
|
1612 * a (wrapped) text line. Uses and sets "lp->fill".
|
|
1613 * Returns the height of the added line in "lp->height".
|
|
1614 * Lines above the first one are incredibly high.
|
|
1615 */
|
|
1616 static void
|
|
1617 topline_back(lp)
|
|
1618 lineoff_T *lp;
|
|
1619 {
|
|
1620 #ifdef FEAT_DIFF
|
|
1621 if (lp->fill < diff_check_fill(curwin, lp->lnum))
|
|
1622 {
|
|
1623 /* Add a filler line. */
|
|
1624 ++lp->fill;
|
|
1625 lp->height = 1;
|
|
1626 }
|
|
1627 else
|
|
1628 #endif
|
|
1629 {
|
|
1630 --lp->lnum;
|
|
1631 #ifdef FEAT_DIFF
|
|
1632 lp->fill = 0;
|
|
1633 #endif
|
|
1634 if (lp->lnum < 1)
|
|
1635 lp->height = MAXCOL;
|
|
1636 else
|
|
1637 #ifdef FEAT_FOLDING
|
|
1638 if (hasFolding(lp->lnum, &lp->lnum, NULL))
|
|
1639 /* Add a closed fold */
|
|
1640 lp->height = 1;
|
|
1641 else
|
|
1642 #endif
|
|
1643 {
|
|
1644 #ifdef FEAT_DIFF
|
|
1645 lp->height = plines_nofill(lp->lnum);
|
|
1646 #else
|
|
1647 lp->height = plines(lp->lnum);
|
|
1648 #endif
|
|
1649 }
|
|
1650 }
|
|
1651 }
|
|
1652
|
|
1653 /*
|
|
1654 * Add one line below "lp->lnum". This can be a filler line, a closed fold or
|
|
1655 * a (wrapped) text line. Uses and sets "lp->fill".
|
|
1656 * Returns the height of the added line in "lp->height".
|
|
1657 * Lines below the last one are incredibly high.
|
|
1658 */
|
|
1659 static void
|
|
1660 botline_forw(lp)
|
|
1661 lineoff_T *lp;
|
|
1662 {
|
|
1663 #ifdef FEAT_DIFF
|
|
1664 if (lp->fill < diff_check_fill(curwin, lp->lnum + 1))
|
|
1665 {
|
|
1666 /* Add a filler line. */
|
|
1667 ++lp->fill;
|
|
1668 lp->height = 1;
|
|
1669 }
|
|
1670 else
|
|
1671 #endif
|
|
1672 {
|
|
1673 ++lp->lnum;
|
|
1674 #ifdef FEAT_DIFF
|
|
1675 lp->fill = 0;
|
|
1676 #endif
|
|
1677 if (lp->lnum > curbuf->b_ml.ml_line_count)
|
|
1678 lp->height = MAXCOL;
|
|
1679 else
|
|
1680 #ifdef FEAT_FOLDING
|
|
1681 if (hasFolding(lp->lnum, NULL, &lp->lnum))
|
|
1682 /* Add a closed fold */
|
|
1683 lp->height = 1;
|
|
1684 else
|
|
1685 #endif
|
|
1686 {
|
|
1687 #ifdef FEAT_DIFF
|
|
1688 lp->height = plines_nofill(lp->lnum);
|
|
1689 #else
|
|
1690 lp->height = plines(lp->lnum);
|
|
1691 #endif
|
|
1692 }
|
|
1693 }
|
|
1694 }
|
|
1695
|
|
1696 #ifdef FEAT_DIFF
|
|
1697 /*
|
|
1698 * Switch from including filler lines below lp->lnum to including filler
|
|
1699 * lines above loff.lnum + 1. This keeps pointing to the same line.
|
|
1700 * When there are no filler lines nothing changes.
|
|
1701 */
|
|
1702 static void
|
|
1703 botline_topline(lp)
|
|
1704 lineoff_T *lp;
|
|
1705 {
|
|
1706 if (lp->fill > 0)
|
|
1707 {
|
|
1708 ++lp->lnum;
|
|
1709 lp->fill = diff_check_fill(curwin, lp->lnum) - lp->fill + 1;
|
|
1710 }
|
|
1711 }
|
|
1712
|
|
1713 /*
|
|
1714 * Switch from including filler lines above lp->lnum to including filler
|
|
1715 * lines below loff.lnum - 1. This keeps pointing to the same line.
|
|
1716 * When there are no filler lines nothing changes.
|
|
1717 */
|
|
1718 static void
|
|
1719 topline_botline(lp)
|
|
1720 lineoff_T *lp;
|
|
1721 {
|
|
1722 if (lp->fill > 0)
|
|
1723 {
|
|
1724 lp->fill = diff_check_fill(curwin, lp->lnum) - lp->fill + 1;
|
|
1725 --lp->lnum;
|
|
1726 }
|
|
1727 }
|
|
1728 #endif
|
|
1729
|
|
1730 /*
|
|
1731 * Recompute topline to put the cursor at the top of the window.
|
|
1732 * Scroll at least "min_scroll" lines.
|
|
1733 * If "always" is TRUE, always set topline (for "zt").
|
|
1734 */
|
|
1735 void
|
|
1736 scroll_cursor_top(min_scroll, always)
|
|
1737 int min_scroll;
|
|
1738 int always;
|
|
1739 {
|
|
1740 int scrolled = 0;
|
|
1741 int extra = 0;
|
|
1742 int used;
|
|
1743 int i;
|
|
1744 linenr_T top; /* just above displayed lines */
|
|
1745 linenr_T bot; /* just below displayed lines */
|
|
1746 linenr_T old_topline = curwin->w_topline;
|
|
1747 #ifdef FEAT_DIFF
|
|
1748 linenr_T old_topfill = curwin->w_topfill;
|
|
1749 #endif
|
|
1750 linenr_T new_topline;
|
|
1751 int off = p_so;
|
|
1752
|
|
1753 #ifdef FEAT_MOUSE
|
|
1754 if (mouse_dragging > 0)
|
|
1755 off = mouse_dragging - 1;
|
|
1756 #endif
|
|
1757
|
|
1758 /*
|
|
1759 * Decrease topline until:
|
|
1760 * - it has become 1
|
|
1761 * - (part of) the cursor line is moved off the screen or
|
|
1762 * - moved at least 'scrolljump' lines and
|
|
1763 * - at least 'scrolloff' lines above and below the cursor
|
|
1764 */
|
|
1765 validate_cheight();
|
|
1766 used = curwin->w_cline_height;
|
|
1767 if (curwin->w_cursor.lnum < curwin->w_topline)
|
|
1768 scrolled = used;
|
|
1769
|
|
1770 #ifdef FEAT_FOLDING
|
|
1771 if (hasFolding(curwin->w_cursor.lnum, &top, &bot))
|
|
1772 {
|
|
1773 --top;
|
|
1774 ++bot;
|
|
1775 }
|
|
1776 else
|
|
1777 #endif
|
|
1778 {
|
|
1779 top = curwin->w_cursor.lnum - 1;
|
|
1780 bot = curwin->w_cursor.lnum + 1;
|
|
1781 }
|
|
1782 new_topline = top + 1;
|
|
1783
|
|
1784 #ifdef FEAT_DIFF
|
|
1785 /* count filler lines of the cursor window as context */
|
|
1786 i = diff_check_fill(curwin, curwin->w_cursor.lnum);
|
|
1787 used += i;
|
|
1788 extra += i;
|
|
1789 #endif
|
|
1790
|
|
1791 /*
|
|
1792 * Check if the lines from "top" to "bot" fit in the window. If they do,
|
|
1793 * set new_topline and advance "top" and "bot" to include more lines.
|
|
1794 */
|
|
1795 while (top > 0)
|
|
1796 {
|
|
1797 #ifdef FEAT_FOLDING
|
|
1798 if (hasFolding(top, &top, NULL))
|
|
1799 /* count one logical line for a sequence of folded lines */
|
|
1800 i = 1;
|
|
1801 else
|
|
1802 #endif
|
|
1803 i = plines(top);
|
|
1804 used += i;
|
|
1805 if (extra + i <= off && bot < curbuf->b_ml.ml_line_count)
|
|
1806 {
|
|
1807 #ifdef FEAT_FOLDING
|
|
1808 if (hasFolding(bot, NULL, &bot))
|
|
1809 /* count one logical line for a sequence of folded lines */
|
|
1810 ++used;
|
|
1811 else
|
|
1812 #endif
|
|
1813 used += plines(bot);
|
|
1814 }
|
|
1815 if (used > curwin->w_height)
|
|
1816 break;
|
|
1817 if (top < curwin->w_topline)
|
|
1818 scrolled += i;
|
|
1819
|
|
1820 /*
|
|
1821 * If scrolling is needed, scroll at least 'sj' lines.
|
|
1822 */
|
|
1823 if ((new_topline >= curwin->w_topline || scrolled > min_scroll)
|
|
1824 && extra >= off)
|
|
1825 break;
|
|
1826
|
|
1827 extra += i;
|
|
1828 new_topline = top;
|
|
1829 --top;
|
|
1830 ++bot;
|
|
1831 }
|
|
1832
|
|
1833 /*
|
|
1834 * If we don't have enough space, put cursor in the middle.
|
|
1835 * This makes sure we get the same position when using "k" and "j"
|
|
1836 * in a small window.
|
|
1837 */
|
|
1838 if (used > curwin->w_height)
|
|
1839 scroll_cursor_halfway(FALSE);
|
|
1840 else
|
|
1841 {
|
|
1842 /*
|
|
1843 * If "always" is FALSE, only adjust topline to a lower value, higher
|
|
1844 * value may happen with wrapping lines
|
|
1845 */
|
|
1846 if (new_topline < curwin->w_topline || always)
|
|
1847 curwin->w_topline = new_topline;
|
|
1848 if (curwin->w_topline > curwin->w_cursor.lnum)
|
|
1849 curwin->w_topline = curwin->w_cursor.lnum;
|
|
1850 #ifdef FEAT_DIFF
|
|
1851 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline);
|
|
1852 if (curwin->w_topfill > 0 && extra > off)
|
|
1853 {
|
|
1854 curwin->w_topfill -= extra - off;
|
|
1855 if (curwin->w_topfill < 0)
|
|
1856 curwin->w_topfill = 0;
|
|
1857 }
|
|
1858 check_topfill(curwin, FALSE);
|
|
1859 #endif
|
|
1860 if (curwin->w_topline != old_topline
|
|
1861 #ifdef FEAT_DIFF
|
|
1862 || curwin->w_topfill != old_topfill
|
|
1863 #endif
|
|
1864 )
|
|
1865 curwin->w_valid &=
|
|
1866 ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
1867 curwin->w_valid |= VALID_TOPLINE;
|
|
1868 }
|
|
1869 }
|
|
1870
|
|
1871 /*
|
|
1872 * Set w_empty_rows and w_filler_rows for window "wp", having used up "used"
|
|
1873 * screen lines for text lines.
|
|
1874 */
|
|
1875 void
|
|
1876 set_empty_rows(wp, used)
|
|
1877 win_T *wp;
|
|
1878 int used;
|
|
1879 {
|
|
1880 #ifdef FEAT_DIFF
|
|
1881 wp->w_filler_rows = 0;
|
|
1882 #endif
|
|
1883 if (used == 0)
|
|
1884 wp->w_empty_rows = 0; /* single line that doesn't fit */
|
|
1885 else
|
|
1886 {
|
|
1887 wp->w_empty_rows = wp->w_height - used;
|
|
1888 #ifdef FEAT_DIFF
|
|
1889 if (wp->w_botline <= wp->w_buffer->b_ml.ml_line_count)
|
|
1890 {
|
|
1891 wp->w_filler_rows = diff_check_fill(wp, wp->w_botline);
|
|
1892 if (wp->w_empty_rows > wp->w_filler_rows)
|
|
1893 wp->w_empty_rows -= wp->w_filler_rows;
|
|
1894 else
|
|
1895 {
|
|
1896 wp->w_filler_rows = wp->w_empty_rows;
|
|
1897 wp->w_empty_rows = 0;
|
|
1898 }
|
|
1899 }
|
|
1900 #endif
|
|
1901 }
|
|
1902 }
|
|
1903
|
|
1904 /*
|
|
1905 * Recompute topline to put the cursor at the bottom of the window.
|
|
1906 * Scroll at least "min_scroll" lines.
|
|
1907 * If "set_topbot" is TRUE, set topline and botline first (for "zb").
|
|
1908 * This is messy stuff!!!
|
|
1909 */
|
|
1910 void
|
|
1911 scroll_cursor_bot(min_scroll, set_topbot)
|
|
1912 int min_scroll;
|
|
1913 int set_topbot;
|
|
1914 {
|
|
1915 int used;
|
|
1916 int scrolled = 0;
|
|
1917 int extra = 0;
|
|
1918 int i;
|
|
1919 linenr_T line_count;
|
|
1920 linenr_T old_topline = curwin->w_topline;
|
|
1921 lineoff_T loff;
|
|
1922 lineoff_T boff;
|
|
1923 #ifdef FEAT_DIFF
|
|
1924 int old_topfill = curwin->w_topfill;
|
|
1925 int fill_below_window;
|
|
1926 #endif
|
|
1927 linenr_T old_botline = curwin->w_botline;
|
|
1928 linenr_T old_valid = curwin->w_valid;
|
|
1929 int old_empty_rows = curwin->w_empty_rows;
|
|
1930 linenr_T cln; /* Cursor Line Number */
|
|
1931
|
|
1932 cln = curwin->w_cursor.lnum;
|
|
1933 if (set_topbot)
|
|
1934 {
|
|
1935 used = 0;
|
|
1936 curwin->w_botline = cln + 1;
|
|
1937 #ifdef FEAT_DIFF
|
|
1938 loff.fill = 0;
|
|
1939 #endif
|
|
1940 for (curwin->w_topline = curwin->w_botline;
|
|
1941 curwin->w_topline > 1;
|
|
1942 curwin->w_topline = loff.lnum)
|
|
1943 {
|
|
1944 loff.lnum = curwin->w_topline;
|
|
1945 topline_back(&loff);
|
|
1946 if (used + loff.height > curwin->w_height)
|
|
1947 break;
|
|
1948 used += loff.height;
|
|
1949 #ifdef FEAT_DIFF
|
|
1950 curwin->w_topfill = loff.fill;
|
|
1951 #endif
|
|
1952 }
|
|
1953 set_empty_rows(curwin, used);
|
|
1954 curwin->w_valid |= VALID_BOTLINE|VALID_BOTLINE_AP;
|
|
1955 if (curwin->w_topline != old_topline
|
|
1956 #ifdef FEAT_DIFF
|
|
1957 || curwin->w_topfill != old_topfill
|
|
1958 #endif
|
|
1959 )
|
|
1960 curwin->w_valid &= ~(VALID_WROW|VALID_CROW);
|
|
1961 }
|
|
1962 else
|
|
1963 validate_botline();
|
|
1964
|
|
1965 /* The lines of the cursor line itself are always used. */
|
|
1966 #ifdef FEAT_DIFF
|
|
1967 used = plines_nofill(cln);
|
|
1968 #else
|
|
1969 validate_cheight();
|
|
1970 used = curwin->w_cline_height;
|
|
1971 #endif
|
|
1972
|
|
1973 /* If the cursor is below botline, we will at least scroll by the height
|
|
1974 * of the cursor line. Correct for empty lines, which are really part of
|
|
1975 * botline. */
|
|
1976 if (cln >= curwin->w_botline)
|
|
1977 {
|
|
1978 scrolled = used;
|
|
1979 if (cln == curwin->w_botline)
|
|
1980 scrolled -= curwin->w_empty_rows;
|
|
1981 }
|
|
1982
|
|
1983 /*
|
|
1984 * Stop counting lines to scroll when
|
|
1985 * - hitting start of the file
|
|
1986 * - scrolled nothing or at least 'sj' lines
|
|
1987 * - at least 'so' lines below the cursor
|
|
1988 * - lines between botline and cursor have been counted
|
|
1989 */
|
|
1990 #ifdef FEAT_FOLDING
|
|
1991 if (!hasFolding(curwin->w_cursor.lnum, &loff.lnum, &boff.lnum))
|
|
1992 #endif
|
|
1993 {
|
|
1994 loff.lnum = cln;
|
|
1995 boff.lnum = cln;
|
|
1996 }
|
|
1997 #ifdef FEAT_DIFF
|
|
1998 loff.fill = 0;
|
|
1999 boff.fill = 0;
|
|
2000 fill_below_window = diff_check_fill(curwin, curwin->w_botline)
|
|
2001 - curwin->w_filler_rows;
|
|
2002 #endif
|
|
2003
|
|
2004 while (loff.lnum > 1)
|
|
2005 {
|
|
2006 /* Stop when scrolled nothing or at least "min_scroll", found "extra"
|
|
2007 * context for 'scrolloff' and counted all lines below the window. */
|
|
2008 if ((((scrolled <= 0 || scrolled >= min_scroll)
|
|
2009 && extra >= (
|
|
2010 #ifdef FEAT_MOUSE
|
1121
|
2011 mouse_dragging > 0 ? mouse_dragging - 1 :
|
7
|
2012 #endif
|
|
2013 p_so))
|
|
2014 || boff.lnum + 1 > curbuf->b_ml.ml_line_count)
|
|
2015 && loff.lnum <= curwin->w_botline
|
|
2016 #ifdef FEAT_DIFF
|
|
2017 && (loff.lnum < curwin->w_botline
|
|
2018 || loff.fill >= fill_below_window)
|
|
2019 #endif
|
|
2020 )
|
|
2021 break;
|
|
2022
|
|
2023 /* Add one line above */
|
|
2024 topline_back(&loff);
|
|
2025 used += loff.height;
|
|
2026 if (used > curwin->w_height)
|
|
2027 break;
|
|
2028 if (loff.lnum >= curwin->w_botline
|
|
2029 #ifdef FEAT_DIFF
|
|
2030 && (loff.lnum > curwin->w_botline
|
|
2031 || loff.fill <= fill_below_window)
|
|
2032 #endif
|
|
2033 )
|
|
2034 {
|
|
2035 /* Count screen lines that are below the window. */
|
|
2036 scrolled += loff.height;
|
|
2037 if (loff.lnum == curwin->w_botline
|
|
2038 #ifdef FEAT_DIFF
|
|
2039 && boff.fill == 0
|
|
2040 #endif
|
|
2041 )
|
|
2042 scrolled -= curwin->w_empty_rows;
|
|
2043 }
|
|
2044
|
|
2045 if (boff.lnum < curbuf->b_ml.ml_line_count)
|
|
2046 {
|
|
2047 /* Add one line below */
|
|
2048 botline_forw(&boff);
|
|
2049 used += boff.height;
|
|
2050 if (used > curwin->w_height)
|
|
2051 break;
|
|
2052 if (extra < (
|
|
2053 #ifdef FEAT_MOUSE
|
|
2054 mouse_dragging > 0 ? mouse_dragging - 1 :
|
|
2055 #endif
|
|
2056 p_so) || scrolled < min_scroll)
|
|
2057 {
|
|
2058 extra += boff.height;
|
|
2059 if (boff.lnum >= curwin->w_botline
|
|
2060 #ifdef FEAT_DIFF
|
|
2061 || (boff.lnum + 1 == curwin->w_botline
|
|
2062 && boff.fill > curwin->w_filler_rows)
|
|
2063 #endif
|
|
2064 )
|
|
2065 {
|
|
2066 /* Count screen lines that are below the window. */
|
|
2067 scrolled += boff.height;
|
|
2068 if (boff.lnum == curwin->w_botline
|
|
2069 #ifdef FEAT_DIFF
|
|
2070 && boff.fill == 0
|
|
2071 #endif
|
|
2072 )
|
|
2073 scrolled -= curwin->w_empty_rows;
|
|
2074 }
|
|
2075 }
|
|
2076 }
|
|
2077 }
|
|
2078
|
|
2079 /* curwin->w_empty_rows is larger, no need to scroll */
|
|
2080 if (scrolled <= 0)
|
|
2081 line_count = 0;
|
|
2082 /* more than a screenfull, don't scroll but redraw */
|
|
2083 else if (used > curwin->w_height)
|
|
2084 line_count = used;
|
|
2085 /* scroll minimal number of lines */
|
|
2086 else
|
|
2087 {
|
|
2088 line_count = 0;
|
|
2089 #ifdef FEAT_DIFF
|
|
2090 boff.fill = curwin->w_topfill;
|
|
2091 #endif
|
|
2092 boff.lnum = curwin->w_topline - 1;
|
|
2093 for (i = 0; i < scrolled && boff.lnum < curwin->w_botline; )
|
|
2094 {
|
|
2095 botline_forw(&boff);
|
|
2096 i += boff.height;
|
|
2097 ++line_count;
|
|
2098 }
|
|
2099 if (i < scrolled) /* below curwin->w_botline, don't scroll */
|
|
2100 line_count = 9999;
|
|
2101 }
|
|
2102
|
|
2103 /*
|
|
2104 * Scroll up if the cursor is off the bottom of the screen a bit.
|
|
2105 * Otherwise put it at 1/2 of the screen.
|
|
2106 */
|
|
2107 if (line_count >= curwin->w_height && line_count > min_scroll)
|
|
2108 scroll_cursor_halfway(FALSE);
|
|
2109 else
|
|
2110 scrollup(line_count, TRUE);
|
|
2111
|
|
2112 /*
|
|
2113 * If topline didn't change we need to restore w_botline and w_empty_rows
|
|
2114 * (we changed them).
|
|
2115 * If topline did change, update_screen() will set botline.
|
|
2116 */
|
|
2117 if (curwin->w_topline == old_topline && set_topbot)
|
|
2118 {
|
|
2119 curwin->w_botline = old_botline;
|
|
2120 curwin->w_empty_rows = old_empty_rows;
|
|
2121 curwin->w_valid = old_valid;
|
|
2122 }
|
|
2123 curwin->w_valid |= VALID_TOPLINE;
|
|
2124 }
|
|
2125
|
|
2126 /*
|
|
2127 * Recompute topline to put the cursor halfway the window
|
|
2128 * If "atend" is TRUE, also put it halfway at the end of the file.
|
|
2129 */
|
|
2130 void
|
|
2131 scroll_cursor_halfway(atend)
|
|
2132 int atend;
|
|
2133 {
|
|
2134 int above = 0;
|
|
2135 linenr_T topline;
|
|
2136 #ifdef FEAT_DIFF
|
|
2137 int topfill = 0;
|
|
2138 #endif
|
|
2139 int below = 0;
|
|
2140 int used;
|
|
2141 lineoff_T loff;
|
|
2142 lineoff_T boff;
|
|
2143
|
|
2144 loff.lnum = boff.lnum = curwin->w_cursor.lnum;
|
|
2145 #ifdef FEAT_FOLDING
|
|
2146 (void)hasFolding(loff.lnum, &loff.lnum, &boff.lnum);
|
|
2147 #endif
|
|
2148 #ifdef FEAT_DIFF
|
|
2149 used = plines_nofill(loff.lnum);
|
|
2150 loff.fill = 0;
|
|
2151 boff.fill = 0;
|
|
2152 #else
|
|
2153 used = plines(loff.lnum);
|
|
2154 #endif
|
|
2155 topline = loff.lnum;
|
|
2156 while (topline > 1)
|
|
2157 {
|
|
2158 if (below <= above) /* add a line below the cursor first */
|
|
2159 {
|
|
2160 if (boff.lnum < curbuf->b_ml.ml_line_count)
|
|
2161 {
|
|
2162 botline_forw(&boff);
|
|
2163 used += boff.height;
|
|
2164 if (used > curwin->w_height)
|
|
2165 break;
|
|
2166 below += boff.height;
|
|
2167 }
|
|
2168 else
|
|
2169 {
|
|
2170 ++below; /* count a "~" line */
|
|
2171 if (atend)
|
|
2172 ++used;
|
|
2173 }
|
|
2174 }
|
|
2175
|
|
2176 if (below > above) /* add a line above the cursor */
|
|
2177 {
|
|
2178 topline_back(&loff);
|
|
2179 used += loff.height;
|
|
2180 if (used > curwin->w_height)
|
|
2181 break;
|
|
2182 above += loff.height;
|
|
2183 topline = loff.lnum;
|
|
2184 #ifdef FEAT_DIFF
|
|
2185 topfill = loff.fill;
|
|
2186 #endif
|
|
2187 }
|
|
2188 }
|
|
2189 #ifdef FEAT_FOLDING
|
|
2190 if (!hasFolding(topline, &curwin->w_topline, NULL))
|
|
2191 #endif
|
|
2192 curwin->w_topline = topline;
|
|
2193 #ifdef FEAT_DIFF
|
|
2194 curwin->w_topfill = topfill;
|
|
2195 check_topfill(curwin, FALSE);
|
|
2196 #endif
|
|
2197 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
2198 curwin->w_valid |= VALID_TOPLINE;
|
|
2199 }
|
|
2200
|
|
2201 /*
|
|
2202 * Correct the cursor position so that it is in a part of the screen at least
|
|
2203 * 'so' lines from the top and bottom, if possible.
|
|
2204 * If not possible, put it at the same position as scroll_cursor_halfway().
|
|
2205 * When called topline must be valid!
|
|
2206 */
|
|
2207 void
|
|
2208 cursor_correct()
|
|
2209 {
|
|
2210 int above = 0; /* screen lines above topline */
|
|
2211 linenr_T topline;
|
|
2212 int below = 0; /* screen lines below botline */
|
|
2213 linenr_T botline;
|
|
2214 int above_wanted, below_wanted;
|
|
2215 linenr_T cln; /* Cursor Line Number */
|
|
2216 int max_off;
|
|
2217
|
|
2218 /*
|
|
2219 * How many lines we would like to have above/below the cursor depends on
|
|
2220 * whether the first/last line of the file is on screen.
|
|
2221 */
|
|
2222 above_wanted = p_so;
|
|
2223 below_wanted = p_so;
|
|
2224 #ifdef FEAT_MOUSE
|
1121
|
2225 if (mouse_dragging > 0)
|
7
|
2226 {
|
|
2227 above_wanted = mouse_dragging - 1;
|
|
2228 below_wanted = mouse_dragging - 1;
|
|
2229 }
|
|
2230 #endif
|
|
2231 if (curwin->w_topline == 1)
|
|
2232 {
|
|
2233 above_wanted = 0;
|
|
2234 max_off = curwin->w_height / 2;
|
|
2235 if (below_wanted > max_off)
|
|
2236 below_wanted = max_off;
|
|
2237 }
|
|
2238 validate_botline();
|
|
2239 if (curwin->w_botline == curbuf->b_ml.ml_line_count + 1
|
|
2240 #ifdef FEAT_MOUSE
|
1121
|
2241 && mouse_dragging == 0
|
7
|
2242 #endif
|
|
2243 )
|
|
2244 {
|
|
2245 below_wanted = 0;
|
|
2246 max_off = (curwin->w_height - 1) / 2;
|
|
2247 if (above_wanted > max_off)
|
|
2248 above_wanted = max_off;
|
|
2249 }
|
|
2250
|
|
2251 /*
|
|
2252 * If there are sufficient file-lines above and below the cursor, we can
|
|
2253 * return now.
|
|
2254 */
|
|
2255 cln = curwin->w_cursor.lnum;
|
|
2256 if (cln >= curwin->w_topline + above_wanted
|
|
2257 && cln < curwin->w_botline - below_wanted
|
|
2258 #ifdef FEAT_FOLDING
|
|
2259 && !hasAnyFolding(curwin)
|
|
2260 #endif
|
|
2261 )
|
|
2262 return;
|
|
2263
|
|
2264 /*
|
|
2265 * Narrow down the area where the cursor can be put by taking lines from
|
|
2266 * the top and the bottom until:
|
|
2267 * - the desired context lines are found
|
|
2268 * - the lines from the top is past the lines from the bottom
|
|
2269 */
|
|
2270 topline = curwin->w_topline;
|
|
2271 botline = curwin->w_botline - 1;
|
|
2272 #ifdef FEAT_DIFF
|
|
2273 /* count filler lines as context */
|
|
2274 above = curwin->w_topfill;
|
|
2275 below = curwin->w_filler_rows;
|
|
2276 #endif
|
|
2277 while ((above < above_wanted || below < below_wanted) && topline < botline)
|
|
2278 {
|
|
2279 if (below < below_wanted && (below <= above || above >= above_wanted))
|
|
2280 {
|
|
2281 #ifdef FEAT_FOLDING
|
|
2282 if (hasFolding(botline, &botline, NULL))
|
|
2283 ++below;
|
|
2284 else
|
|
2285 #endif
|
|
2286 below += plines(botline);
|
|
2287 --botline;
|
|
2288 }
|
|
2289 if (above < above_wanted && (above < below || below >= below_wanted))
|
|
2290 {
|
|
2291 #ifdef FEAT_FOLDING
|
|
2292 if (hasFolding(topline, NULL, &topline))
|
|
2293 ++above;
|
|
2294 else
|
|
2295 #endif
|
|
2296 #ifndef FEAT_DIFF
|
|
2297 above += plines(topline);
|
|
2298 #else
|
|
2299 above += plines_nofill(topline);
|
|
2300
|
|
2301 /* Count filler lines below this line as context. */
|
|
2302 if (topline < botline)
|
|
2303 above += diff_check_fill(curwin, topline + 1);
|
|
2304 #endif
|
|
2305 ++topline;
|
|
2306 }
|
|
2307 }
|
|
2308 if (topline == botline || botline == 0)
|
|
2309 curwin->w_cursor.lnum = topline;
|
|
2310 else if (topline > botline)
|
|
2311 curwin->w_cursor.lnum = botline;
|
|
2312 else
|
|
2313 {
|
|
2314 if (cln < topline && curwin->w_topline > 1)
|
|
2315 {
|
|
2316 curwin->w_cursor.lnum = topline;
|
|
2317 curwin->w_valid &=
|
|
2318 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW);
|
|
2319 }
|
|
2320 if (cln > botline && curwin->w_botline <= curbuf->b_ml.ml_line_count)
|
|
2321 {
|
|
2322 curwin->w_cursor.lnum = botline;
|
|
2323 curwin->w_valid &=
|
|
2324 ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW);
|
|
2325 }
|
|
2326 }
|
|
2327 curwin->w_valid |= VALID_TOPLINE;
|
|
2328 }
|
|
2329
|
|
2330 static void get_scroll_overlap __ARGS((lineoff_T *lp, int dir));
|
|
2331
|
|
2332 /*
|
|
2333 * move screen 'count' pages up or down and update screen
|
|
2334 *
|
|
2335 * return FAIL for failure, OK otherwise
|
|
2336 */
|
|
2337 int
|
|
2338 onepage(dir, count)
|
|
2339 int dir;
|
|
2340 long count;
|
|
2341 {
|
|
2342 long n;
|
|
2343 int retval = OK;
|
|
2344 lineoff_T loff;
|
|
2345 linenr_T old_topline = curwin->w_topline;
|
|
2346
|
|
2347 if (curbuf->b_ml.ml_line_count == 1) /* nothing to do */
|
|
2348 {
|
|
2349 beep_flush();
|
|
2350 return FAIL;
|
|
2351 }
|
|
2352
|
|
2353 for ( ; count > 0; --count)
|
|
2354 {
|
|
2355 validate_botline();
|
|
2356 /*
|
|
2357 * It's an error to move a page up when the first line is already on
|
|
2358 * the screen. It's an error to move a page down when the last line
|
|
2359 * is on the screen and the topline is 'scrolloff' lines from the
|
|
2360 * last line.
|
|
2361 */
|
|
2362 if (dir == FORWARD
|
|
2363 ? ((curwin->w_topline >= curbuf->b_ml.ml_line_count - p_so)
|
|
2364 && curwin->w_botline > curbuf->b_ml.ml_line_count)
|
|
2365 : (curwin->w_topline == 1
|
|
2366 #ifdef FEAT_DIFF
|
|
2367 && curwin->w_topfill ==
|
|
2368 diff_check_fill(curwin, curwin->w_topline)
|
|
2369 #endif
|
|
2370 ))
|
|
2371 {
|
|
2372 beep_flush();
|
|
2373 retval = FAIL;
|
|
2374 break;
|
|
2375 }
|
|
2376
|
|
2377 #ifdef FEAT_DIFF
|
|
2378 loff.fill = 0;
|
|
2379 #endif
|
|
2380 if (dir == FORWARD)
|
|
2381 {
|
164
|
2382 if (firstwin == lastwin && p_window > 0 && p_window < Rows - 1)
|
7
|
2383 {
|
164
|
2384 /* Vi compatible scrolling */
|
|
2385 if (p_window <= 2)
|
|
2386 ++curwin->w_topline;
|
|
2387 else
|
|
2388 curwin->w_topline += p_window - 2;
|
|
2389 if (curwin->w_topline > curbuf->b_ml.ml_line_count)
|
|
2390 curwin->w_topline = curbuf->b_ml.ml_line_count;
|
|
2391 curwin->w_cursor.lnum = curwin->w_topline;
|
|
2392 }
|
|
2393 else if (curwin->w_botline > curbuf->b_ml.ml_line_count)
|
|
2394 {
|
|
2395 /* at end of file */
|
7
|
2396 curwin->w_topline = curbuf->b_ml.ml_line_count;
|
|
2397 #ifdef FEAT_DIFF
|
|
2398 curwin->w_topfill = 0;
|
|
2399 #endif
|
|
2400 curwin->w_valid &= ~(VALID_WROW|VALID_CROW);
|
|
2401 }
|
|
2402 else
|
|
2403 {
|
|
2404 /* For the overlap, start with the line just below the window
|
|
2405 * and go upwards. */
|
|
2406 loff.lnum = curwin->w_botline;
|
|
2407 #ifdef FEAT_DIFF
|
|
2408 loff.fill = diff_check_fill(curwin, loff.lnum)
|
|
2409 - curwin->w_filler_rows;
|
|
2410 #endif
|
|
2411 get_scroll_overlap(&loff, -1);
|
|
2412 curwin->w_topline = loff.lnum;
|
|
2413 #ifdef FEAT_DIFF
|
|
2414 curwin->w_topfill = loff.fill;
|
|
2415 check_topfill(curwin, FALSE);
|
|
2416 #endif
|
|
2417 curwin->w_cursor.lnum = curwin->w_topline;
|
|
2418 curwin->w_valid &= ~(VALID_WCOL|VALID_CHEIGHT|VALID_WROW|
|
|
2419 VALID_CROW|VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
2420 }
|
|
2421 }
|
|
2422 else /* dir == BACKWARDS */
|
|
2423 {
|
|
2424 #ifdef FEAT_DIFF
|
|
2425 if (curwin->w_topline == 1)
|
|
2426 {
|
|
2427 /* Include max number of filler lines */
|
|
2428 max_topfill();
|
|
2429 continue;
|
|
2430 }
|
|
2431 #endif
|
164
|
2432 if (firstwin == lastwin && p_window > 0 && p_window < Rows - 1)
|
|
2433 {
|
|
2434 /* Vi compatible scrolling (sort of) */
|
|
2435 if (p_window <= 2)
|
|
2436 --curwin->w_topline;
|
|
2437 else
|
|
2438 curwin->w_topline -= p_window - 2;
|
|
2439 if (curwin->w_topline < 1)
|
|
2440 curwin->w_topline = 1;
|
|
2441 curwin->w_cursor.lnum = curwin->w_topline + p_window - 1;
|
|
2442 if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
|
|
2443 curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
|
|
2444 continue;
|
|
2445 }
|
|
2446
|
7
|
2447 /* Find the line at the top of the window that is going to be the
|
|
2448 * line at the bottom of the window. Make sure this results in
|
|
2449 * the same line as before doing CTRL-F. */
|
|
2450 loff.lnum = curwin->w_topline - 1;
|
|
2451 #ifdef FEAT_DIFF
|
|
2452 loff.fill = diff_check_fill(curwin, loff.lnum + 1)
|
|
2453 - curwin->w_topfill;
|
|
2454 #endif
|
|
2455 get_scroll_overlap(&loff, 1);
|
|
2456
|
|
2457 if (loff.lnum >= curbuf->b_ml.ml_line_count)
|
|
2458 {
|
|
2459 loff.lnum = curbuf->b_ml.ml_line_count;
|
|
2460 #ifdef FEAT_DIFF
|
|
2461 loff.fill = 0;
|
|
2462 }
|
|
2463 else
|
|
2464 {
|
|
2465 botline_topline(&loff);
|
|
2466 #endif
|
|
2467 }
|
|
2468 curwin->w_cursor.lnum = loff.lnum;
|
|
2469
|
|
2470 /* Find the line just above the new topline to get the right line
|
|
2471 * at the bottom of the window. */
|
|
2472 n = 0;
|
|
2473 while (n <= curwin->w_height && loff.lnum >= 1)
|
|
2474 {
|
|
2475 topline_back(&loff);
|
|
2476 n += loff.height;
|
|
2477 }
|
|
2478 if (n <= curwin->w_height) /* at begin of file */
|
|
2479 {
|
|
2480 curwin->w_topline = 1;
|
|
2481 #ifdef FEAT_DIFF
|
|
2482 max_topfill();
|
|
2483 #endif
|
|
2484 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
2485 }
|
|
2486 else
|
|
2487 {
|
|
2488 /* Go two lines forward again. */
|
|
2489 #ifdef FEAT_DIFF
|
|
2490 topline_botline(&loff);
|
|
2491 #endif
|
|
2492 botline_forw(&loff);
|
|
2493 botline_forw(&loff);
|
|
2494 #ifdef FEAT_DIFF
|
|
2495 botline_topline(&loff);
|
|
2496 #endif
|
|
2497 #ifdef FEAT_FOLDING
|
|
2498 /* We're at the wrong end of a fold now. */
|
|
2499 (void)hasFolding(loff.lnum, &loff.lnum, NULL);
|
|
2500 #endif
|
|
2501
|
|
2502 /* Always scroll at least one line. Avoid getting stuck on
|
|
2503 * very long lines. */
|
|
2504 if (loff.lnum >= curwin->w_topline
|
|
2505 #ifdef FEAT_DIFF
|
|
2506 && (loff.lnum > curwin->w_topline
|
|
2507 || loff.fill >= curwin->w_topfill)
|
|
2508 #endif
|
|
2509 )
|
|
2510 {
|
|
2511 #ifdef FEAT_DIFF
|
|
2512 /* First try using the maximum number of filler lines. If
|
|
2513 * that's not enough, backup one line. */
|
|
2514 loff.fill = curwin->w_topfill;
|
|
2515 if (curwin->w_topfill < diff_check_fill(curwin,
|
|
2516 curwin->w_topline))
|
|
2517 max_topfill();
|
|
2518 if (curwin->w_topfill == loff.fill)
|
|
2519 #endif
|
|
2520 {
|
|
2521 --curwin->w_topline;
|
|
2522 #ifdef FEAT_DIFF
|
|
2523 curwin->w_topfill = 0;
|
|
2524 #endif
|
|
2525 }
|
|
2526 comp_botline(curwin);
|
|
2527 curwin->w_cursor.lnum = curwin->w_botline - 1;
|
|
2528 curwin->w_valid &= ~(VALID_WCOL|VALID_CHEIGHT|
|
|
2529 VALID_WROW|VALID_CROW);
|
|
2530 }
|
|
2531 else
|
|
2532 {
|
|
2533 curwin->w_topline = loff.lnum;
|
|
2534 #ifdef FEAT_DIFF
|
|
2535 curwin->w_topfill = loff.fill;
|
|
2536 check_topfill(curwin, FALSE);
|
|
2537 #endif
|
|
2538 curwin->w_valid &= ~(VALID_WROW|VALID_CROW|VALID_BOTLINE);
|
|
2539 }
|
|
2540 }
|
|
2541 }
|
|
2542 }
|
|
2543 #ifdef FEAT_FOLDING
|
|
2544 foldAdjustCursor();
|
|
2545 #endif
|
|
2546 cursor_correct();
|
161
|
2547 if (retval == OK)
|
|
2548 beginline(BL_SOL | BL_FIX);
|
7
|
2549 curwin->w_valid &= ~(VALID_WCOL|VALID_WROW|VALID_VIRTCOL);
|
|
2550
|
|
2551 /*
|
|
2552 * Avoid the screen jumping up and down when 'scrolloff' is non-zero.
|
|
2553 * But make sure we scroll at least one line (happens with mix of long
|
|
2554 * wrapping lines and non-wrapping line).
|
|
2555 */
|
|
2556 if (retval == OK && dir == FORWARD && check_top_offset())
|
|
2557 {
|
|
2558 scroll_cursor_top(1, FALSE);
|
|
2559 if (curwin->w_topline <= old_topline
|
|
2560 && old_topline < curbuf->b_ml.ml_line_count)
|
|
2561 {
|
|
2562 curwin->w_topline = old_topline + 1;
|
|
2563 #ifdef FEAT_FOLDING
|
|
2564 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
2565 #endif
|
|
2566 }
|
|
2567 }
|
|
2568
|
|
2569 redraw_later(VALID);
|
|
2570 return retval;
|
|
2571 }
|
|
2572
|
|
2573 /*
|
|
2574 * Decide how much overlap to use for page-up or page-down scrolling.
|
|
2575 * This is symmetric, so that doing both keeps the same lines displayed.
|
|
2576 * Three lines are examined:
|
|
2577 *
|
|
2578 * before CTRL-F after CTRL-F / before CTRL-B
|
|
2579 * etc. l1
|
|
2580 * l1 last but one line ------------
|
|
2581 * l2 last text line l2 top text line
|
|
2582 * ------------- l3 second text line
|
|
2583 * l3 etc.
|
|
2584 */
|
|
2585 static void
|
|
2586 get_scroll_overlap(lp, dir)
|
|
2587 lineoff_T *lp;
|
|
2588 int dir;
|
|
2589 {
|
|
2590 int h1, h2, h3, h4;
|
|
2591 int min_height = curwin->w_height - 2;
|
|
2592 lineoff_T loff0, loff1, loff2;
|
|
2593
|
|
2594 #ifdef FEAT_DIFF
|
|
2595 if (lp->fill > 0)
|
|
2596 lp->height = 1;
|
|
2597 else
|
|
2598 lp->height = plines_nofill(lp->lnum);
|
|
2599 #else
|
|
2600 lp->height = plines(lp->lnum);
|
|
2601 #endif
|
|
2602 h1 = lp->height;
|
|
2603 if (h1 > min_height)
|
|
2604 return; /* no overlap */
|
|
2605
|
|
2606 loff0 = *lp;
|
|
2607 if (dir > 0)
|
|
2608 botline_forw(lp);
|
|
2609 else
|
|
2610 topline_back(lp);
|
|
2611 h2 = lp->height;
|
|
2612 if (h2 + h1 > min_height)
|
|
2613 {
|
|
2614 *lp = loff0; /* no overlap */
|
|
2615 return;
|
|
2616 }
|
|
2617
|
|
2618 loff1 = *lp;
|
|
2619 if (dir > 0)
|
|
2620 botline_forw(lp);
|
|
2621 else
|
|
2622 topline_back(lp);
|
|
2623 h3 = lp->height;
|
|
2624 if (h3 + h2 > min_height)
|
|
2625 {
|
|
2626 *lp = loff0; /* no overlap */
|
|
2627 return;
|
|
2628 }
|
|
2629
|
|
2630 loff2 = *lp;
|
|
2631 if (dir > 0)
|
|
2632 botline_forw(lp);
|
|
2633 else
|
|
2634 topline_back(lp);
|
|
2635 h4 = lp->height;
|
|
2636 if (h4 + h3 + h2 > min_height || h3 + h2 + h1 > min_height)
|
|
2637 *lp = loff1; /* 1 line overlap */
|
|
2638 else
|
|
2639 *lp = loff2; /* 2 lines overlap */
|
|
2640 return;
|
|
2641 }
|
|
2642
|
|
2643 /* #define KEEP_SCREEN_LINE */
|
|
2644 /*
|
|
2645 * Scroll 'scroll' lines up or down.
|
|
2646 */
|
|
2647 void
|
|
2648 halfpage(flag, Prenum)
|
|
2649 int flag;
|
|
2650 linenr_T Prenum;
|
|
2651 {
|
|
2652 long scrolled = 0;
|
|
2653 int i;
|
|
2654 int n;
|
|
2655 int room;
|
|
2656
|
|
2657 if (Prenum)
|
|
2658 curwin->w_p_scr = (Prenum > curwin->w_height) ?
|
|
2659 curwin->w_height : Prenum;
|
|
2660 n = (curwin->w_p_scr <= curwin->w_height) ?
|
|
2661 curwin->w_p_scr : curwin->w_height;
|
|
2662
|
|
2663 validate_botline();
|
|
2664 room = curwin->w_empty_rows;
|
|
2665 #ifdef FEAT_DIFF
|
|
2666 room += curwin->w_filler_rows;
|
|
2667 #endif
|
|
2668 if (flag)
|
|
2669 {
|
|
2670 /*
|
|
2671 * scroll the text up
|
|
2672 */
|
|
2673 while (n > 0 && curwin->w_botline <= curbuf->b_ml.ml_line_count)
|
|
2674 {
|
|
2675 #ifdef FEAT_DIFF
|
|
2676 if (curwin->w_topfill > 0)
|
|
2677 {
|
|
2678 i = 1;
|
|
2679 if (--n < 0 && scrolled > 0)
|
|
2680 break;
|
|
2681 --curwin->w_topfill;
|
|
2682 }
|
|
2683 else
|
|
2684 #endif
|
|
2685 {
|
|
2686 #ifdef FEAT_DIFF
|
|
2687 i = plines_nofill(curwin->w_topline);
|
|
2688 #else
|
|
2689 i = plines(curwin->w_topline);
|
|
2690 #endif
|
|
2691 n -= i;
|
|
2692 if (n < 0 && scrolled > 0)
|
|
2693 break;
|
|
2694 #ifdef FEAT_FOLDING
|
|
2695 (void)hasFolding(curwin->w_topline, NULL, &curwin->w_topline);
|
|
2696 #endif
|
|
2697 ++curwin->w_topline;
|
|
2698 #ifdef FEAT_DIFF
|
|
2699 curwin->w_topfill = diff_check_fill(curwin, curwin->w_topline);
|
|
2700 #endif
|
|
2701
|
|
2702 #ifndef KEEP_SCREEN_LINE
|
|
2703 if (curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)
|
|
2704 {
|
|
2705 ++curwin->w_cursor.lnum;
|
|
2706 curwin->w_valid &=
|
|
2707 ~(VALID_VIRTCOL|VALID_CHEIGHT|VALID_WCOL);
|
|
2708 }
|
|
2709 #endif
|
|
2710 }
|
|
2711 curwin->w_valid &= ~(VALID_CROW|VALID_WROW);
|
|
2712 scrolled += i;
|
|
2713
|
|
2714 /*
|
|
2715 * Correct w_botline for changed w_topline.
|
|
2716 * Won't work when there are filler lines.
|
|
2717 */
|
|
2718 #ifdef FEAT_DIFF
|
|
2719 if (curwin->w_p_diff)
|
|
2720 curwin->w_valid &= ~(VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
2721 else
|
|
2722 #endif
|
|
2723 {
|
|
2724 room += i;
|
|
2725 do
|
|
2726 {
|
|
2727 i = plines(curwin->w_botline);
|
|
2728 if (i > room)
|
|
2729 break;
|
|
2730 #ifdef FEAT_FOLDING
|
|
2731 (void)hasFolding(curwin->w_botline, NULL,
|
|
2732 &curwin->w_botline);
|
|
2733 #endif
|
|
2734 ++curwin->w_botline;
|
|
2735 room -= i;
|
|
2736 } while (curwin->w_botline <= curbuf->b_ml.ml_line_count);
|
|
2737 }
|
|
2738 }
|
|
2739
|
|
2740 #ifndef KEEP_SCREEN_LINE
|
|
2741 /*
|
|
2742 * When hit bottom of the file: move cursor down.
|
|
2743 */
|
|
2744 if (n > 0)
|
|
2745 {
|
|
2746 # ifdef FEAT_FOLDING
|
|
2747 if (hasAnyFolding(curwin))
|
|
2748 {
|
|
2749 while (--n >= 0
|
|
2750 && curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)
|
|
2751 {
|
|
2752 (void)hasFolding(curwin->w_cursor.lnum, NULL,
|
|
2753 &curwin->w_cursor.lnum);
|
|
2754 ++curwin->w_cursor.lnum;
|
|
2755 }
|
|
2756 }
|
|
2757 else
|
|
2758 # endif
|
|
2759 curwin->w_cursor.lnum += n;
|
|
2760 check_cursor_lnum();
|
|
2761 }
|
|
2762 #else
|
|
2763 /* try to put the cursor in the same screen line */
|
|
2764 while ((curwin->w_cursor.lnum < curwin->w_topline || scrolled > 0)
|
|
2765 && curwin->w_cursor.lnum < curwin->w_botline - 1)
|
|
2766 {
|
|
2767 scrolled -= plines(curwin->w_cursor.lnum);
|
|
2768 if (scrolled < 0 && curwin->w_cursor.lnum >= curwin->w_topline)
|
|
2769 break;
|
|
2770 # ifdef FEAT_FOLDING
|
|
2771 (void)hasFolding(curwin->w_cursor.lnum, NULL,
|
|
2772 &curwin->w_cursor.lnum);
|
|
2773 # endif
|
|
2774 ++curwin->w_cursor.lnum;
|
|
2775 }
|
|
2776 #endif
|
|
2777 }
|
|
2778 else
|
|
2779 {
|
|
2780 /*
|
|
2781 * scroll the text down
|
|
2782 */
|
|
2783 while (n > 0 && curwin->w_topline > 1)
|
|
2784 {
|
|
2785 #ifdef FEAT_DIFF
|
|
2786 if (curwin->w_topfill < diff_check_fill(curwin, curwin->w_topline))
|
|
2787 {
|
|
2788 i = 1;
|
|
2789 if (--n < 0 && scrolled > 0)
|
|
2790 break;
|
|
2791 ++curwin->w_topfill;
|
|
2792 }
|
|
2793 else
|
|
2794 #endif
|
|
2795 {
|
|
2796 #ifdef FEAT_DIFF
|
|
2797 i = plines_nofill(curwin->w_topline - 1);
|
|
2798 #else
|
|
2799 i = plines(curwin->w_topline - 1);
|
|
2800 #endif
|
|
2801 n -= i;
|
|
2802 if (n < 0 && scrolled > 0)
|
|
2803 break;
|
|
2804 --curwin->w_topline;
|
|
2805 #ifdef FEAT_FOLDING
|
|
2806 (void)hasFolding(curwin->w_topline, &curwin->w_topline, NULL);
|
|
2807 #endif
|
|
2808 #ifdef FEAT_DIFF
|
|
2809 curwin->w_topfill = 0;
|
|
2810 #endif
|
|
2811 }
|
|
2812 curwin->w_valid &= ~(VALID_CROW|VALID_WROW|
|
|
2813 VALID_BOTLINE|VALID_BOTLINE_AP);
|
|
2814 scrolled += i;
|
|
2815 #ifndef KEEP_SCREEN_LINE
|
|
2816 if (curwin->w_cursor.lnum > 1)
|
|
2817 {
|
|
2818 --curwin->w_cursor.lnum;
|
|
2819 curwin->w_valid &= ~(VALID_VIRTCOL|VALID_CHEIGHT|VALID_WCOL);
|
|
2820 }
|
|
2821 #endif
|
|
2822 }
|
|
2823 #ifndef KEEP_SCREEN_LINE
|
|
2824 /*
|
|
2825 * When hit top of the file: move cursor up.
|
|
2826 */
|
|
2827 if (n > 0)
|
|
2828 {
|
|
2829 if (curwin->w_cursor.lnum <= (linenr_T)n)
|
|
2830 curwin->w_cursor.lnum = 1;
|
|
2831 else
|
|
2832 # ifdef FEAT_FOLDING
|
|
2833 if (hasAnyFolding(curwin))
|
|
2834 {
|
|
2835 while (--n >= 0 && curwin->w_cursor.lnum > 1)
|
|
2836 {
|
|
2837 --curwin->w_cursor.lnum;
|
|
2838 (void)hasFolding(curwin->w_cursor.lnum,
|
|
2839 &curwin->w_cursor.lnum, NULL);
|
|
2840 }
|
|
2841 }
|
|
2842 else
|
|
2843 # endif
|
|
2844 curwin->w_cursor.lnum -= n;
|
|
2845 }
|
|
2846 #else
|
|
2847 /* try to put the cursor in the same screen line */
|
|
2848 scrolled += n; /* move cursor when topline is 1 */
|
|
2849 while (curwin->w_cursor.lnum > curwin->w_topline
|
|
2850 && (scrolled > 0 || curwin->w_cursor.lnum >= curwin->w_botline))
|
|
2851 {
|
|
2852 scrolled -= plines(curwin->w_cursor.lnum - 1);
|
|
2853 if (scrolled < 0 && curwin->w_cursor.lnum < curwin->w_botline)
|
|
2854 break;
|
|
2855 --curwin->w_cursor.lnum;
|
|
2856 # ifdef FEAT_FOLDING
|
|
2857 foldAdjustCursor();
|
|
2858 # endif
|
|
2859 }
|
|
2860 #endif
|
|
2861 }
|
|
2862 # ifdef FEAT_FOLDING
|
|
2863 /* Move cursor to first line of closed fold. */
|
|
2864 foldAdjustCursor();
|
|
2865 # endif
|
|
2866 #ifdef FEAT_DIFF
|
|
2867 check_topfill(curwin, !flag);
|
|
2868 #endif
|
|
2869 cursor_correct();
|
|
2870 beginline(BL_SOL | BL_FIX);
|
|
2871 redraw_later(VALID);
|
|
2872 }
|