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annotate src/beval.c @ 17641:10631f073626

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Added tag v8.1.1817 for changeset c12c811695f7ac8ba2498cbb8116b96278c6f3bc
author Bram Moolenaar <Bram@vim.org>
date Sun, 04 Aug 2019 23:30:05 +0200
parents 74b6674b99fd
children c8a53c0daeed
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_TEXT_PROP) || 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 }
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113
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114 if (winp != NULL)
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115 *winp = wp;
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116 if (lnump != NULL)
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117 *lnump = lnum;
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118 *textp = lbuf;
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119 if (colp != NULL)
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120 *colp = col;
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121 if (startcolp != NULL)
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122 *startcolp = scol;
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123 return OK;
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124 }
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125 }
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126 }
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127 return FAIL;
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128 }
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129 #endif
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130
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131 #if defined(FEAT_BEVAL) || defined(PROTO)
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132
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133 /*
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134 * Get the text and position to be evaluated for "beval".
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135 * If "getword" is TRUE the returned text is not the whole line but the
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136 * relevant word in allocated memory.
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137 * Returns OK or FAIL.
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138 */
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139 int
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140 get_beval_info(
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141 BalloonEval *beval,
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142 int getword,
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143 win_T **winp,
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144 linenr_T *lnump,
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145 char_u **textp,
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146 int *colp)
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147 {
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148 int row = mouse_row;
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149 int col = mouse_col;
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150
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151 # ifdef FEAT_GUI
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152 if (gui.in_use)
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153 {
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154 row = Y_2_ROW(beval->y);
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155 col = X_2_COL(beval->x);
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156 }
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157 #endif
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158 if (find_word_under_cursor(row, col, getword,
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159 FIND_IDENT + FIND_STRING + FIND_EVAL,
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160 winp, lnump, textp, colp, NULL) == OK)
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161 {
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162 #ifdef FEAT_VARTABS
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163 vim_free(beval->vts);
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164 beval->vts = tabstop_copy((*winp)->w_buffer->b_p_vts_array);
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165 if ((*winp)->w_buffer->b_p_vts_array != NULL && beval->vts == NULL)
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166 {
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167 if (getword)
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168 vim_free(*textp);
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169 return FAIL;
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170 }
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171 #endif
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172 beval->ts = (*winp)->w_buffer->b_p_ts;
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173 return OK;
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174 }
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175
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176 return FAIL;
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177 }
12871
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178
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179 /*
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180 * Show a balloon with "mesg" or "list".
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181 * Hide the balloon when both are NULL.
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182 */
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183 void
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184 post_balloon(BalloonEval *beval UNUSED, char_u *mesg, list_T *list UNUSED)
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185 {
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186 # ifdef FEAT_BEVAL_TERM
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187 # ifdef FEAT_GUI
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188 if (!gui.in_use)
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189 # endif
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190 ui_post_balloon(mesg, list);
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191 # endif
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192 # ifdef FEAT_BEVAL_GUI
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193 if (gui.in_use)
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194 // GUI can't handle a list
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195 gui_mch_post_balloon(beval, mesg);
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196 # endif
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197 }
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198
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199 /*
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200 * Returns TRUE if the balloon eval has been enabled:
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201 * 'ballooneval' for the GUI and 'balloonevalterm' for the terminal.
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202 * Also checks if the screen isn't scrolled up.
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203 */
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204 int
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205 can_use_beval(void)
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206 {
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207 return (0
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208 #ifdef FEAT_BEVAL_GUI
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209 || (gui.in_use && p_beval)
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210 #endif
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211 #ifdef FEAT_BEVAL_TERM
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212 || (
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213 # ifdef FEAT_GUI
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214 !gui.in_use &&
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215 # endif
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216 p_bevalterm)
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217 #endif
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218 ) && msg_scrolled == 0;
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219 }
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220
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221 /*
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222 * Common code, invoked when the mouse is resting for a moment.
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223 */
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224 void
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225 general_beval_cb(BalloonEval *beval, int state UNUSED)
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226 {
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227 #ifdef FEAT_EVAL
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228 win_T *wp;
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229 int col;
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230 int use_sandbox;
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231 linenr_T lnum;
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232 char_u *text;
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233 static char_u *result = NULL;
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234 long winnr = 0;
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235 char_u *bexpr;
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236 buf_T *save_curbuf;
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237 size_t len;
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238 win_T *cw;
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239 #endif
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240 static int recursive = FALSE;
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241
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242 /* Don't do anything when 'ballooneval' is off, messages scrolled the
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243 * windows up or we have no beval area. */
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244 if (!can_use_beval() || beval == NULL)
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245 return;
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246
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247 /* Don't do this recursively. Happens when the expression evaluation
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248 * takes a long time and invokes something that checks for CTRL-C typed. */
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249 if (recursive)
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250 return;
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251 recursive = TRUE;
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252
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253 #ifdef FEAT_EVAL
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254 if (get_beval_info(beval, TRUE, &wp, &lnum, &text, &col) == OK)
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255 {
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256 bexpr = (*wp->w_buffer->b_p_bexpr == NUL) ? p_bexpr
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257 : wp->w_buffer->b_p_bexpr;
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258 if (*bexpr != NUL)
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259 {
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260 /* Convert window pointer to number. */
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261 for (cw = firstwin; cw != wp; cw = cw->w_next)
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262 ++winnr;
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263
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264 set_vim_var_nr(VV_BEVAL_BUFNR, (long)wp->w_buffer->b_fnum);
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265 set_vim_var_nr(VV_BEVAL_WINNR, winnr);
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266 set_vim_var_nr(VV_BEVAL_WINID, wp->w_id);
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267 set_vim_var_nr(VV_BEVAL_LNUM, (long)lnum);
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268 set_vim_var_nr(VV_BEVAL_COL, (long)(col + 1));
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269 set_vim_var_string(VV_BEVAL_TEXT, text, -1);
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270 vim_free(text);
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271
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272 /*
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273 * Temporarily change the curbuf, so that we can determine whether
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274 * the buffer-local balloonexpr option was set insecurely.
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275 */
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276 save_curbuf = curbuf;
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277 curbuf = wp->w_buffer;
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278 use_sandbox = was_set_insecurely((char_u *)"balloonexpr",
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279 *curbuf->b_p_bexpr == NUL ? 0 : OPT_LOCAL);
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280 curbuf = save_curbuf;
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281 if (use_sandbox)
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282 ++sandbox;
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283 ++textlock;
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284
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285 vim_free(result);
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286 result = eval_to_string(bexpr, NULL, TRUE);
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287
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288 /* Remove one trailing newline, it is added when the result was a
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289 * list and it's hardly ever useful. If the user really wants a
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290 * trailing newline he can add two and one remains. */
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291 if (result != NULL)
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292 {
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293 len = STRLEN(result);
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294 if (len > 0 && result[len - 1] == NL)
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295 result[len - 1] = NUL;
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296 }
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297
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298 if (use_sandbox)
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299 --sandbox;
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300 --textlock;
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301
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302 set_vim_var_string(VV_BEVAL_TEXT, NULL, -1);
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303 if (result != NULL && result[0] != NUL)
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304 post_balloon(beval, result, NULL);
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305
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306 // The 'balloonexpr' evaluation may show something on the screen
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307 // that requires a screen update.
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308 if (must_redraw)
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309 redraw_after_callback(FALSE);
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310
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311 recursive = FALSE;
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312 return;
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313 }
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314 }
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315 #endif
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316 #ifdef FEAT_NETBEANS_INTG
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317 if (bevalServers & BEVAL_NETBEANS)
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318 netbeans_beval_cb(beval, state);
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319 #endif
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320
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321 recursive = FALSE;
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322 }
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323
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324 #endif
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325