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annotate src/beval.c @ 21322:ade12c914e81

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Added tag v8.2.1211 for changeset 1421eca61db962add02f81da4ddcc0dc4ab1b74e
author Bram Moolenaar <Bram@vim.org>
date Tue, 14 Jul 2020 21:30:06 +0200
parents 3af71cbcfdbe
children fee1e854e183
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
12871
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1 /* vi:set ts=8 sts=4 sw=4 noet:
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2 *
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3 * VIM - Vi IMproved by Bram Moolenaar
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4 * Visual Workshop integration by Gordon Prieur
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5 *
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6 * Do ":help uganda" in Vim to read copying and usage conditions.
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7 * Do ":help credits" in Vim to see a list of people who contributed.
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8 * See README.txt for an overview of the Vim source code.
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9 */
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10
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11 #include "vim.h"
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12
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13 #if defined(FEAT_BEVAL) || defined(FEAT_PROP_POPUP) || defined(PROTO)
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14 /*
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15 * Find text under the mouse position "row" / "col".
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16 * If "getword" is TRUE the returned text in "*textp" is not the whole line but
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17 * the relevant word in allocated memory.
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18 * Return OK if found.
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19 * Return FAIL if not found, no text at the mouse position.
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20 */
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21 int
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22 find_word_under_cursor(
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23 int mouserow,
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24 int mousecol,
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25 int getword,
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26 int flags, // flags for find_ident_at_pos()
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27 win_T **winp, // can be NULL
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28 linenr_T *lnump, // can be NULL
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29 char_u **textp,
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30 int *colp, // column where mouse hovers, can be NULL
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31 int *startcolp) // column where text starts, can be NULL
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32 {
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33 int row = mouserow;
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34 int col = mousecol;
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35 int scol;
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36 win_T *wp;
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37 char_u *lbuf;
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38 linenr_T lnum;
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39
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40 *textp = NULL;
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41 wp = mouse_find_win(&row, &col, FAIL_POPUP);
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42 if (wp != NULL && row >= 0 && row < wp->w_height && col < wp->w_width)
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43 {
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44 // Found a window and the cursor is in the text. Now find the line
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45 // number.
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46 if (!mouse_comp_pos(wp, &row, &col, &lnum, NULL))
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47 {
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48 // Not past end of the file.
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49 lbuf = ml_get_buf(wp->w_buffer, lnum, FALSE);
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50 if (col <= win_linetabsize(wp, lbuf, (colnr_T)MAXCOL))
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51 {
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52 // Not past end of line.
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53 if (getword)
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54 {
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55 // For Netbeans we get the relevant part of the line
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56 // instead of the whole line.
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57 int len;
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58 pos_T *spos = NULL, *epos = NULL;
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59
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60 if (VIsual_active)
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61 {
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62 if (LT_POS(VIsual, curwin->w_cursor))
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63 {
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64 spos = &VIsual;
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65 epos = &curwin->w_cursor;
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66 }
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67 else
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68 {
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69 spos = &curwin->w_cursor;
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70 epos = &VIsual;
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71 }
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72 }
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73
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74 col = vcol2col(wp, lnum, col);
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75 scol = col;
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76
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77 if (VIsual_active
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78 && wp->w_buffer == curwin->w_buffer
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79 && (lnum == spos->lnum
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80 ? col >= (int)spos->col
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81 : lnum > spos->lnum)
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82 && (lnum == epos->lnum
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83 ? col <= (int)epos->col
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84 : lnum < epos->lnum))
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85 {
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86 // Visual mode and pointing to the line with the
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87 // Visual selection: return selected text, with a
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88 // maximum of one line.
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89 if (spos->lnum != epos->lnum || spos->col == epos->col)
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90 return FAIL;
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91
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92 lbuf = ml_get_buf(curwin->w_buffer, VIsual.lnum, FALSE);
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93 len = epos->col - spos->col;
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94 if (*p_sel != 'e')
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95 len += mb_ptr2len(lbuf + epos->col);
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96 lbuf = vim_strnsave(lbuf + spos->col, len);
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97 lnum = spos->lnum;
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98 col = spos->col;
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99 scol = col;
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100 }
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101 else
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102 {
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103 // Find the word under the cursor.
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104 ++emsg_off;
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105 len = find_ident_at_pos(wp, lnum, (colnr_T)col,
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106 &lbuf, &scol, flags);
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107 --emsg_off;
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108 if (len == 0)
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109 return FAIL;
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110 lbuf = vim_strnsave(lbuf, len);
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111 }
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112 }
19908
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113 else
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114 scol = col;
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115
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116 if (winp != NULL)
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117 *winp = wp;
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118 if (lnump != NULL)
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119 *lnump = lnum;
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120 *textp = lbuf;
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121 if (colp != NULL)
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122 *colp = col;
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123 if (startcolp != NULL)
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124 *startcolp = scol;
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125 return OK;
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126 }
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127 }
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128 }
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129 return FAIL;
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130 }
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131 #endif
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132
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133 #if defined(FEAT_BEVAL) || defined(PROTO)
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134
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135 /*
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136 * Get the text and position to be evaluated for "beval".
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137 * If "getword" is TRUE the returned text is not the whole line but the
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138 * relevant word in allocated memory.
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139 * Returns OK or FAIL.
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140 */
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141 int
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142 get_beval_info(
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143 BalloonEval *beval,
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144 int getword,
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145 win_T **winp,
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146 linenr_T *lnump,
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147 char_u **textp,
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148 int *colp)
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149 {
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150 int row = mouse_row;
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151 int col = mouse_col;
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152
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153 # ifdef FEAT_GUI
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154 if (gui.in_use)
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155 {
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156 row = Y_2_ROW(beval->y);
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157 col = X_2_COL(beval->x);
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158 }
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159 #endif
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160 if (find_word_under_cursor(row, col, getword,
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161 FIND_IDENT + FIND_STRING + FIND_EVAL,
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162 winp, lnump, textp, colp, NULL) == OK)
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163 {
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164 #ifdef FEAT_VARTABS
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165 vim_free(beval->vts);
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166 beval->vts = tabstop_copy((*winp)->w_buffer->b_p_vts_array);
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167 if ((*winp)->w_buffer->b_p_vts_array != NULL && beval->vts == NULL)
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168 {
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169 if (getword)
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170 vim_free(*textp);
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171 return FAIL;
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172 }
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173 #endif
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174 beval->ts = (*winp)->w_buffer->b_p_ts;
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175 return OK;
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176 }
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177
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178 return FAIL;
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179 }
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180
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181 /*
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182 * Show a balloon with "mesg" or "list".
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183 * Hide the balloon when both are NULL.
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184 */
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185 void
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186 post_balloon(BalloonEval *beval UNUSED, char_u *mesg, list_T *list UNUSED)
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187 {
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188 # ifdef FEAT_BEVAL_TERM
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189 # ifdef FEAT_GUI
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190 if (!gui.in_use)
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191 # endif
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192 ui_post_balloon(mesg, list);
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193 # endif
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194 # ifdef FEAT_BEVAL_GUI
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195 if (gui.in_use)
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196 // GUI can't handle a list
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197 gui_mch_post_balloon(beval, mesg);
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198 # endif
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199 }
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200
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201 /*
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202 * Returns TRUE if the balloon eval has been enabled:
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203 * 'ballooneval' for the GUI and 'balloonevalterm' for the terminal.
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204 * Also checks if the screen isn't scrolled up.
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205 */
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206 int
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207 can_use_beval(void)
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208 {
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209 return (0
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210 #ifdef FEAT_BEVAL_GUI
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211 || (gui.in_use && p_beval)
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212 #endif
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213 #ifdef FEAT_BEVAL_TERM
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214 || (
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215 # ifdef FEAT_GUI
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216 !gui.in_use &&
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217 # endif
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218 p_bevalterm)
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219 #endif
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220 ) && msg_scrolled == 0;
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221 }
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222
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223 /*
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224 * Common code, invoked when the mouse is resting for a moment.
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225 */
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226 void
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227 general_beval_cb(BalloonEval *beval, int state UNUSED)
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228 {
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229 #ifdef FEAT_EVAL
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230 win_T *wp;
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231 int col;
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232 int use_sandbox;
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233 linenr_T lnum;
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234 char_u *text;
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235 static char_u *result = NULL;
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236 long winnr = 0;
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237 char_u *bexpr;
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238 buf_T *save_curbuf;
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239 size_t len;
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240 win_T *cw;
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241 #endif
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242 static int recursive = FALSE;
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243
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244 // Don't do anything when 'ballooneval' is off, messages scrolled the
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245 // windows up or we have no beval area.
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246 if (!can_use_beval() || beval == NULL)
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247 return;
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248
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249 // Don't do this recursively. Happens when the expression evaluation
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diff changeset
250 // takes a long time and invokes something that checks for CTRL-C typed.
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251 if (recursive)
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252 return;
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253 recursive = TRUE;
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254
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255 #ifdef FEAT_EVAL
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256 if (get_beval_info(beval, TRUE, &wp, &lnum, &text, &col) == OK)
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257 {
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258 bexpr = (*wp->w_buffer->b_p_bexpr == NUL) ? p_bexpr
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259 : wp->w_buffer->b_p_bexpr;
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260 if (*bexpr != NUL)
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261 {
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262 // Convert window pointer to number.
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263 for (cw = firstwin; cw != wp; cw = cw->w_next)
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264 ++winnr;
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265
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266 set_vim_var_nr(VV_BEVAL_BUFNR, (long)wp->w_buffer->b_fnum);
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267 set_vim_var_nr(VV_BEVAL_WINNR, winnr);
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268 set_vim_var_nr(VV_BEVAL_WINID, wp->w_id);
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269 set_vim_var_nr(VV_BEVAL_LNUM, (long)lnum);
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270 set_vim_var_nr(VV_BEVAL_COL, (long)(col + 1));
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271 set_vim_var_string(VV_BEVAL_TEXT, text, -1);
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272 vim_free(text);
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273
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274 /*
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275 * Temporarily change the curbuf, so that we can determine whether
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276 * the buffer-local balloonexpr option was set insecurely.
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277 */
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278 save_curbuf = curbuf;
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279 curbuf = wp->w_buffer;
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280 use_sandbox = was_set_insecurely((char_u *)"balloonexpr",
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281 *curbuf->b_p_bexpr == NUL ? 0 : OPT_LOCAL);
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282 curbuf = save_curbuf;
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283 if (use_sandbox)
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284 ++sandbox;
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285 ++textwinlock;
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286
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287 vim_free(result);
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288 result = eval_to_string(bexpr, TRUE);
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289
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290 // Remove one trailing newline, it is added when the result was a
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291 // list and it's hardly ever useful. If the user really wants a
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292 // trailing newline he can add two and one remains.
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293 if (result != NULL)
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294 {
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295 len = STRLEN(result);
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296 if (len > 0 && result[len - 1] == NL)
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297 result[len - 1] = NUL;
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298 }
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299
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300 if (use_sandbox)
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301 --sandbox;
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302 --textwinlock;
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303
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304 set_vim_var_string(VV_BEVAL_TEXT, NULL, -1);
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305 if (result != NULL && result[0] != NUL)
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306 post_balloon(beval, result, NULL);
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307
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308 // The 'balloonexpr' evaluation may show something on the screen
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309 // that requires a screen update.
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310 if (must_redraw)
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311 redraw_after_callback(FALSE);
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312
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313 recursive = FALSE;
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314 return;
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315 }
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316 }
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317 #endif
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318 #ifdef FEAT_NETBEANS_INTG
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319 if (bevalServers & BEVAL_NETBEANS)
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320 netbeans_beval_cb(beval, state);
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321 #endif
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322
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323 recursive = FALSE;
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324 }
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325
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326 #endif