1 | #include "owl.h" |
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2 | #include <stdlib.h> |
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3 | #include <unistd.h> |
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4 | #include <string.h> |
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5 | #include <ctype.h> |
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6 | |
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7 | static const char fileIdent[] = "$Id$"; |
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8 | |
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9 | #define VALID_EXCURSION (0x9a2b4729) |
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10 | |
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11 | typedef struct oe_excursion_struct { /*noproto*/ |
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12 | int valid; |
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13 | int index; |
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14 | int mark; |
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15 | int goal_column; |
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16 | int lock; |
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17 | struct oe_excursion_struct *next; |
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18 | } oe_excursion; |
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19 | |
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20 | struct _owl_editwin { /*noproto*/ |
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21 | char *buff; |
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22 | owl_history *hist; |
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23 | int bufflen; |
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24 | int allocated; |
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25 | int index; |
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26 | int mark; |
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27 | int goal_column; |
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28 | int topindex; |
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29 | int cursorx; |
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30 | int winlines, wincols, fillcol, wrapcol; |
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31 | WINDOW *curswin; |
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32 | int style; |
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33 | int lock; |
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34 | int dotsend; |
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35 | int echochar; |
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36 | oe_excursion *excursions; |
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37 | |
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38 | char *command; |
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39 | void (*callback)(struct _owl_editwin*); |
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40 | void *cbdata; |
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41 | }; |
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42 | |
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43 | |
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44 | static void oe_reframe(owl_editwin *e); |
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45 | static void oe_save_excursion(owl_editwin *e, oe_excursion *x); |
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46 | static void oe_release_excursion(owl_editwin *e, oe_excursion *x); |
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47 | static void oe_restore_excursion(owl_editwin *e, oe_excursion *x); |
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48 | static int oe_count_glyphs(char *s); |
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49 | static int oe_char_width(gunichar c, int column); |
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50 | static int oe_region_width(owl_editwin *e, int start, int end, int width); |
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51 | static int oe_find_display_line(owl_editwin *e, int *x, int index); |
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52 | static void oe_insert_char(owl_editwin *e, gunichar c); |
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53 | static int owl_editwin_limit_maxcols(int v, int maxv); |
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54 | static int owl_editwin_check_dotsend(owl_editwin *e); |
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55 | static int owl_editwin_is_char_in(owl_editwin *e, char *set); |
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56 | static gunichar owl_editwin_get_char_at_point(owl_editwin *e); |
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57 | static int owl_editwin_replace(owl_editwin *e, int count, char *s); |
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58 | |
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59 | #define INCR 4096 |
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60 | |
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61 | #define WHITESPACE " \n\t" |
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62 | |
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63 | owl_editwin *owl_editwin_allocate(void) |
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64 | { |
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65 | owl_editwin *e; |
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66 | e = owl_malloc(sizeof(owl_editwin)); |
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67 | memset(e, 0, sizeof(*e)); |
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68 | return e; |
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69 | } |
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70 | |
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71 | static int oe_count_glyphs(char *s) |
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72 | { |
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73 | int count = 0; |
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74 | char *p; |
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75 | |
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76 | for(p = s; *p != 0; p = g_utf8_find_next_char(p, NULL)) |
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77 | if (!g_unichar_ismark(g_utf8_get_char(p))) |
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78 | count++; |
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79 | |
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80 | return count; |
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81 | } |
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82 | |
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83 | static inline void oe_set_index(owl_editwin *e, int index) |
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84 | { |
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85 | if (index != e->index) { |
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86 | e->goal_column = -1; |
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87 | e->cursorx = -1; |
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88 | } |
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89 | e->index = index; |
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90 | } |
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91 | |
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92 | /* initialize the editwin e. |
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93 | * 'win' is an already initialzed curses window that will be used by editwin |
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94 | */ |
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95 | void owl_editwin_init(owl_editwin *e, WINDOW *win, int winlines, int wincols, int style, owl_history *hist) |
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96 | { |
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97 | e->buff=owl_malloc(INCR); |
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98 | e->buff[0]='\0'; |
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99 | e->bufflen=0; |
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100 | e->hist=hist; |
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101 | e->allocated=INCR; |
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102 | oe_set_index(e, 0); |
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103 | e->mark = 0; |
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104 | e->goal_column = -1; |
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105 | e->cursorx = -1; |
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106 | e->topindex = 0; |
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107 | e->excursions = NULL; |
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108 | owl_editwin_set_curswin(e, win, winlines, wincols); |
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109 | e->style=style; |
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110 | if ((style!=OWL_EDITWIN_STYLE_MULTILINE) && |
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111 | (style!=OWL_EDITWIN_STYLE_ONELINE)) { |
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112 | e->style=OWL_EDITWIN_STYLE_MULTILINE; |
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113 | } |
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114 | e->lock=0; |
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115 | e->dotsend=0; |
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116 | e->echochar='\0'; |
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117 | |
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118 | /* We get initialized multiple times, but we need to hold on to |
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119 | the callbacks, so we can't NULL them here. */ |
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120 | /* |
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121 | e->command = NULL; |
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122 | e->callback = NULL; |
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123 | e->cbdata = NULL; |
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124 | */ |
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125 | if (win) werase(win); |
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126 | } |
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127 | |
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128 | void owl_editwin_set_curswin(owl_editwin *e, WINDOW *w, int winlines, int wincols) |
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129 | { |
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130 | e->curswin=w; |
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131 | e->winlines=winlines; |
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132 | e->wincols=wincols; |
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133 | e->fillcol=owl_editwin_limit_maxcols(wincols-7, owl_global_get_edit_maxfillcols(&g)); |
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134 | e->wrapcol=owl_editwin_limit_maxcols(wincols-7, owl_global_get_edit_maxwrapcols(&g)); |
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135 | } |
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136 | |
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137 | /* echo the character 'ch' for each normal character keystroke, |
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138 | * excepting locktext. This is useful for entering passwords etc. If |
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139 | * ch=='\0' characters are echo'd normally |
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140 | */ |
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141 | void owl_editwin_set_echochar(owl_editwin *e, int ch) |
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142 | { |
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143 | e->echochar=ch; |
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144 | } |
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145 | |
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146 | WINDOW *owl_editwin_get_curswin(owl_editwin *e) |
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147 | { |
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148 | return(e->curswin); |
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149 | } |
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150 | |
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151 | owl_history *owl_editwin_get_history(owl_editwin *e) |
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152 | { |
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153 | return(e->hist); |
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154 | } |
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155 | |
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156 | void owl_editwin_set_dotsend(owl_editwin *e) |
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157 | { |
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158 | e->dotsend=1; |
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159 | } |
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160 | |
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161 | void owl_editwin_set_command(owl_editwin *e, char *command) |
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162 | { |
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163 | if(e->command) owl_free(e->command); |
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164 | e->command = owl_strdup(command); |
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165 | } |
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166 | |
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167 | char *owl_editwin_get_command(owl_editwin *e) |
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168 | { |
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169 | if(e->command) return e->command; |
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170 | return ""; |
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171 | } |
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172 | |
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173 | void owl_editwin_set_callback(owl_editwin *e, void (*cb)(owl_editwin*)) |
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174 | { |
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175 | e->callback = cb; |
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176 | } |
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177 | |
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178 | void (*owl_editwin_get_callback(owl_editwin *e))(owl_editwin*) |
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179 | { |
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180 | return e->callback; |
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181 | } |
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182 | |
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183 | void owl_editwin_set_cbdata(owl_editwin *e, void *data) |
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184 | { |
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185 | e->cbdata = data; |
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186 | } |
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187 | |
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188 | void *owl_editwin_get_cbdata(owl_editwin *e) { |
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189 | return e->cbdata; |
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190 | } |
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191 | |
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192 | void owl_editwin_do_callback(owl_editwin *e) { |
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193 | void (*cb)(owl_editwin*); |
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194 | cb=owl_editwin_get_callback(e); |
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195 | if(!cb) { |
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196 | owl_function_error("Internal error: No editwin callback!"); |
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197 | } else { |
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198 | /* owl_function_error("text: |%s|", owl_editwin_get_text(e)); */ |
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199 | cb(e); |
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200 | } |
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201 | } |
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202 | |
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203 | static int owl_editwin_limit_maxcols(int v, int maxv) |
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204 | { |
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205 | /* maxv > 5 ? MAX(v, vax) : v */ |
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206 | if (maxv > 5 && v > maxv) { |
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207 | return(maxv); |
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208 | } else { |
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209 | return(v); |
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210 | } |
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211 | } |
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212 | |
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213 | /* set text to be 'locked in' at the beginning of the buffer, any |
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214 | * previous text (including locked text) will be overwritten |
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215 | */ |
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216 | void owl_editwin_set_locktext(owl_editwin *e, char *text) |
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217 | { |
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218 | oe_set_index(e, 0); |
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219 | e->lock = 0; |
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220 | owl_editwin_replace(e, e->bufflen, text); |
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221 | e->buff[e->bufflen] = 0; |
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222 | e->lock=e->bufflen; |
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223 | oe_set_index(e, e->lock); |
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224 | owl_editwin_redisplay(e, 0); |
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225 | } |
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226 | |
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227 | int owl_editwin_get_style(owl_editwin *e) |
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228 | { |
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229 | return(e->style); |
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230 | } |
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231 | |
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232 | void owl_editwin_new_style(owl_editwin *e, int newstyle, owl_history *h) |
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233 | { |
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234 | e->hist = h; |
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235 | |
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236 | if (e->style==newstyle) return; |
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237 | |
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238 | if (newstyle==OWL_EDITWIN_STYLE_MULTILINE) { |
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239 | e->style=newstyle; |
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240 | } else if (newstyle==OWL_EDITWIN_STYLE_ONELINE) { |
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241 | e->style=newstyle; |
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242 | |
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243 | /* nuke everything after the first line */ |
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244 | owl_editwin_move_to_top(e); |
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245 | owl_editwin_move_to_end_of_line(e); |
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246 | owl_editwin_replace(e, oe_count_glyphs(e->buff + e->index), ""); |
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247 | } |
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248 | } |
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249 | |
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250 | /* completly reinitialize the buffer */ |
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251 | void owl_editwin_fullclear(owl_editwin *e) |
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252 | { |
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253 | owl_free(e->buff); |
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254 | owl_editwin_init(e, e->curswin, e->winlines, e->wincols, e->style, e->hist); |
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255 | } |
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256 | |
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257 | /* clear all text except for locktext and put the cursor at the |
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258 | * beginning |
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259 | */ |
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260 | void owl_editwin_clear(owl_editwin *e) |
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261 | { |
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262 | |
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263 | int lock = e->lock; |
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264 | int dotsend=e->dotsend; |
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265 | char *locktext=NULL; |
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266 | char echochar=e->echochar; |
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267 | |
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268 | if (lock > 0) { |
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269 | locktext = owl_malloc(lock+1); |
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270 | strncpy(locktext, e->buff, lock); |
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271 | locktext[lock] = 0; |
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272 | } |
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273 | |
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274 | owl_free(e->buff); |
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275 | owl_editwin_init(e, e->curswin, e->winlines, e->wincols, e->style, e->hist); |
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276 | |
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277 | if (lock > 0) { |
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278 | owl_editwin_set_locktext(e, locktext); |
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279 | } |
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280 | if (dotsend) { |
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281 | owl_editwin_set_dotsend(e); |
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282 | } |
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283 | if (echochar) { |
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284 | owl_editwin_set_echochar(e, echochar); |
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285 | } |
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286 | |
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287 | if (locktext) |
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288 | owl_free(locktext); |
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289 | |
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290 | oe_set_index(e, lock); |
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291 | } |
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292 | |
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293 | void owl_editwin_recenter(owl_editwin *e) |
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294 | { |
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295 | e->topindex = -1; |
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296 | } |
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297 | |
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298 | static void oe_save_excursion(owl_editwin *e, oe_excursion *x) |
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299 | { |
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300 | x->index = e->index; |
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301 | x->goal_column = e->goal_column; |
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302 | x->lock = e->lock; |
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303 | |
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304 | x->valid = VALID_EXCURSION; |
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305 | x->next = e->excursions; |
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306 | e->excursions = x; |
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307 | } |
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308 | |
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309 | static void oe_release_excursion(owl_editwin *e, oe_excursion *x) |
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310 | { |
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311 | oe_excursion *p; |
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312 | |
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313 | x->valid = 0; |
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314 | if (e->excursions == NULL) |
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315 | /* XXX huh. */ ; |
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316 | else if (e->excursions == x) |
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317 | e->excursions = x->next; |
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318 | else { |
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319 | for (p = e->excursions; p->next != NULL; p = p->next) |
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320 | if (p->next == x) { |
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321 | p->next = p->next->next; |
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322 | break; |
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323 | } |
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324 | /* and if we ran off the end? XXX */ |
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325 | } |
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326 | } |
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327 | |
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328 | static void oe_restore_excursion(owl_editwin *e, oe_excursion *x) |
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329 | { |
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330 | if (x->valid == VALID_EXCURSION) { |
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331 | oe_set_index(e, x->index); |
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332 | e->goal_column = x->goal_column; |
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333 | e->lock = x->lock; |
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334 | |
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335 | oe_release_excursion(e, x); |
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336 | } |
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337 | } |
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338 | |
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339 | static inline char *oe_next_point(owl_editwin *e, char *p) |
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340 | { |
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341 | char *boundary = e->buff + e->bufflen + 1; |
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342 | char *q; |
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343 | |
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344 | q = g_utf8_find_next_char(p, boundary); |
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345 | while (q && g_unichar_ismark(g_utf8_get_char(q))) |
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346 | q = g_utf8_find_next_char(q, boundary); |
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347 | |
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348 | if (q == p) |
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349 | return NULL; |
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350 | return q; |
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351 | } |
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352 | |
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353 | static inline char *oe_prev_point(owl_editwin *e, char *p) |
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354 | { |
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355 | char *boundary = e->buff + e->lock; |
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356 | |
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357 | p = g_utf8_find_prev_char(boundary, p); |
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358 | while (p && g_unichar_ismark(g_utf8_get_char(p))) |
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359 | p = g_utf8_find_prev_char(boundary, p); |
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360 | |
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361 | return p; |
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362 | } |
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363 | |
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364 | static int oe_char_width(gunichar c, int column) |
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365 | { |
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366 | int cw; |
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367 | |
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368 | if (c == 9) /* TAB */ |
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369 | return TABSIZE - column % TABSIZE; |
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370 | |
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371 | cw = mk_wcwidth(c); |
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372 | |
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373 | if (cw < 0) /* control characters */ |
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374 | cw = 0; |
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375 | |
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376 | return cw; |
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377 | } |
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378 | |
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379 | static int oe_find_display_line(owl_editwin *e, int *x, int index) |
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380 | { |
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381 | int width = 0, cw; |
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382 | gunichar c; |
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383 | char *p; |
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384 | |
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385 | while(1) { |
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386 | /* note the position of the dot */ |
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387 | if (x != NULL && index == e->index && width < e->wincols) |
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388 | *x = width; |
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389 | |
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390 | /* get the current character */ |
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391 | c = g_utf8_get_char(e->buff + index); |
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392 | |
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393 | /* figure out how wide it is */ |
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394 | cw = oe_char_width(c, width); |
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395 | |
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396 | if (width + cw > e->wincols) { |
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397 | if (x != NULL && *x == width) |
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398 | *x = -1; |
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399 | break; |
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400 | } |
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401 | width += cw; |
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402 | |
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403 | if (c == '\n') { |
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404 | if (width < e->wincols) |
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405 | ++index; /* skip the newline */ |
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406 | break; |
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407 | } |
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408 | |
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409 | /* find the next character */ |
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410 | p = oe_next_point(e, e->buff + index); |
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411 | if (p == NULL) { /* we ran off the end */ |
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412 | if (x != NULL && e->index > index) |
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413 | *x = width + 1; |
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414 | break; |
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415 | } |
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416 | index = p - e->buff; |
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417 | |
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418 | } |
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419 | return index; |
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420 | } |
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421 | |
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422 | static void oe_reframe(owl_editwin *e) { |
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423 | oe_excursion x; |
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424 | int goal = e->winlines / 2; |
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425 | int index; |
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426 | int count = 0; |
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427 | int point; |
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428 | int n, i; |
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429 | int last; |
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430 | |
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431 | oe_save_excursion(e, &x); |
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432 | /* step back line-by-line through the buffer until we have >= goal lines of |
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433 | display text */ |
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434 | e->lock = 0; /* we can (must) tread on the locktext */ |
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435 | |
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436 | point = e->index; |
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437 | last = -1; |
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438 | while (count < goal) { |
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439 | index = e->index; |
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440 | owl_editwin_move_to_beginning_of_line(e); |
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441 | if (last == e->index) |
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442 | break; |
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443 | last = e->index; |
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444 | for (n = 0, i = e->index; i < index; n++) |
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445 | i = oe_find_display_line(e, NULL, i); |
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446 | count += n == 0 ? 1 : n; |
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447 | if (count < goal) |
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448 | owl_editwin_point_move(e, -1); |
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449 | } |
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450 | |
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451 | e->topindex = e->index; |
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452 | /* if we overshot, backtrack */ |
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453 | for (n = 0; n < (count - goal); n++) |
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454 | e->topindex = oe_find_display_line(e, NULL, e->topindex); |
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455 | |
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456 | oe_restore_excursion(e, &x); |
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457 | } |
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458 | |
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459 | /* regenerate the text on the curses window */ |
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460 | /* if update == 1 then do a doupdate(), otherwise do not */ |
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461 | void owl_editwin_redisplay(owl_editwin *e, int update) |
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462 | { |
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463 | int x = -1, y = -1, t; |
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464 | int line, index, lineindex, times = 0; |
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465 | |
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466 | do { |
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467 | werase(e->curswin); |
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468 | |
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469 | if (e->topindex == -1 || e->index < e->topindex) |
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470 | oe_reframe(e); |
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471 | |
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472 | line = 0; |
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473 | index = e->topindex; |
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474 | while(line < e->winlines) { |
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475 | lineindex = index; |
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476 | t = -1; |
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477 | index = oe_find_display_line(e, &t, lineindex); |
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478 | if (x == -1 && t != -1) |
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479 | x = t, y = line; |
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480 | if (index - lineindex) |
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481 | mvwaddnstr(e->curswin, line, 0, |
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482 | e->buff + lineindex, |
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483 | index - lineindex); |
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484 | line++; |
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485 | } |
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486 | if (x == -1) |
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487 | e->topindex = -1; /* force a reframe */ |
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488 | times++; |
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489 | } while(x == -1 && times < 3); |
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490 | |
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491 | wmove(e->curswin, y, x); |
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492 | e->cursorx = x; |
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493 | |
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494 | wnoutrefresh(e->curswin); |
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495 | if (update == 1) |
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496 | doupdate(); |
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497 | } |
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498 | |
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499 | /* replace count characters at the point with s, returning the change in size */ |
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500 | static int owl_editwin_replace(owl_editwin *e, int replace, char *s) |
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501 | { |
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502 | int start, end, i, free, need, size, change; |
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503 | char *p; |
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504 | oe_excursion *x; |
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505 | |
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506 | if (!g_utf8_validate(s, -1, NULL)) { |
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507 | owl_function_debugmsg("owl_editwin_insert_string: received non-utf-8 string."); |
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508 | return 0; |
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509 | } |
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510 | |
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511 | start = e->index; |
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512 | for (i = 0, p = e->buff + start; i < replace && p != NULL; i++) |
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513 | p = oe_next_point(e, p); |
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514 | if (p != NULL) |
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515 | end = p - e->buff; |
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516 | else |
---|
517 | end = e->bufflen; |
---|
518 | |
---|
519 | free = e->allocated - e->bufflen + end - start; |
---|
520 | |
---|
521 | need = strlen(s) - free; |
---|
522 | if (need > 0) { |
---|
523 | size = e->allocated + need + INCR - (need % INCR); |
---|
524 | p = realloc(e->buff, size); |
---|
525 | if (p == NULL) { |
---|
526 | /* XXX signal impending doom somehow and don't do anything */ |
---|
527 | return 0; |
---|
528 | } |
---|
529 | e->buff = p; |
---|
530 | e->allocated = size; |
---|
531 | } |
---|
532 | |
---|
533 | memmove(e->buff + start + strlen(s), e->buff + end, e->bufflen + 1 - end); |
---|
534 | memcpy(e->buff + start, s, strlen(s)); |
---|
535 | change = start - end + strlen(s); |
---|
536 | e->bufflen += change; |
---|
537 | e->index += strlen(s); |
---|
538 | |
---|
539 | /* fix up any saved points after the replaced area */ |
---|
540 | for (x = e->excursions; x != NULL; x = x->next) |
---|
541 | if (x->index > start) { |
---|
542 | if (x->index < end) |
---|
543 | x->index = end; |
---|
544 | else |
---|
545 | x->index += change; |
---|
546 | } |
---|
547 | |
---|
548 | return change; |
---|
549 | } |
---|
550 | |
---|
551 | #if 0 /*XXX*/ |
---|
552 | /* linewrap the word just before the cursor. |
---|
553 | * returns 0 on success |
---|
554 | * returns -1 if we could not wrap. |
---|
555 | */ |
---|
556 | static int _owl_editwin_linewrap_word(owl_editwin *e) |
---|
557 | { |
---|
558 | int i; |
---|
559 | char *ptr1, *start; |
---|
560 | gunichar c; |
---|
561 | |
---|
562 | start = e->buff + e->lock; |
---|
563 | |
---|
564 | ptr1 = e->buff + e->index; |
---|
565 | ptr1 = g_utf8_find_prev_char(start, ptr1); |
---|
566 | |
---|
567 | while (ptr1) { |
---|
568 | c = g_utf8_get_char(ptr1); |
---|
569 | if (owl_util_can_break_after(c)) { |
---|
570 | if (c != ' ') { |
---|
571 | i = ptr1 - e->buff; |
---|
572 | oe_set_index(e, i); |
---|
573 | _owl_editwin_insert_bytes(e, 1); |
---|
574 | /* _owl_editwin_insert_bytes may move e->buff. */ |
---|
575 | ptr1 = e->buff + i; |
---|
576 | } |
---|
577 | *ptr1 = '\n'; |
---|
578 | return 0; |
---|
579 | } |
---|
580 | else if (c == '\n') { |
---|
581 | return 0; |
---|
582 | } |
---|
583 | ptr1 = g_utf8_find_prev_char(start, ptr1); |
---|
584 | } |
---|
585 | return -1; |
---|
586 | } |
---|
587 | #endif |
---|
588 | |
---|
589 | /* delete the character at the current point, following chars |
---|
590 | * shift left. |
---|
591 | */ |
---|
592 | void owl_editwin_delete_char(owl_editwin *e) |
---|
593 | { |
---|
594 | owl_editwin_replace(e, 1, ""); |
---|
595 | } |
---|
596 | |
---|
597 | /* Swap the character at point with the character at point-1 and |
---|
598 | * advance the pointer. If point is at beginning of buffer do |
---|
599 | * nothing. If point is after the last character swap point-1 with |
---|
600 | * point-2. (Behaves as observed in tcsh and emacs). |
---|
601 | */ |
---|
602 | void owl_editwin_transpose_chars(owl_editwin *e) |
---|
603 | { |
---|
604 | char *middle, *end, *start, *tmp; |
---|
605 | |
---|
606 | if (e->bufflen == 0) return; |
---|
607 | |
---|
608 | if (e->index == e->bufflen) |
---|
609 | owl_editwin_point_move(e, -1); /* point is after last character */ |
---|
610 | |
---|
611 | if (owl_editwin_at_beginning_of_buffer(e)) |
---|
612 | return; /* point is at beginning of buffer, do nothing */ |
---|
613 | |
---|
614 | /* Transpose two utf-8 unicode glyphs. */ |
---|
615 | middle = e->buff + e->index; |
---|
616 | |
---|
617 | end = oe_next_point(e, middle); |
---|
618 | if (end == NULL) |
---|
619 | return; |
---|
620 | |
---|
621 | start = oe_prev_point(e, middle); |
---|
622 | if (start == NULL) |
---|
623 | return; |
---|
624 | |
---|
625 | tmp = owl_malloc((end - start) + 1); |
---|
626 | tmp[(end - start)] = 0; |
---|
627 | memcpy(tmp, middle, end - middle); |
---|
628 | memcpy(tmp + (end - middle), start, middle - start); |
---|
629 | |
---|
630 | owl_editwin_point_move(e, -1); |
---|
631 | owl_editwin_replace(e, 2, tmp); |
---|
632 | } |
---|
633 | |
---|
634 | /* insert 'string' at the current point, later text is shifted |
---|
635 | * right |
---|
636 | */ |
---|
637 | void owl_editwin_insert_string(owl_editwin *e, char *s) |
---|
638 | { |
---|
639 | owl_editwin_replace(e, 0, s); |
---|
640 | } |
---|
641 | |
---|
642 | /* We assume index is not set to point to a mid-char */ |
---|
643 | static gunichar owl_editwin_get_char_at_point(owl_editwin *e) |
---|
644 | { |
---|
645 | return g_utf8_get_char(e->buff + e->index); |
---|
646 | } |
---|
647 | |
---|
648 | int owl_editwin_point_move(owl_editwin *e, int delta) |
---|
649 | { |
---|
650 | char *p; |
---|
651 | int change, d = 0; |
---|
652 | |
---|
653 | change = MAX(delta, - delta); |
---|
654 | p = e->buff + e->index; |
---|
655 | |
---|
656 | while (d < change && p != NULL) { |
---|
657 | if (delta > 0) |
---|
658 | p = oe_next_point(e, p); |
---|
659 | else |
---|
660 | p = oe_prev_point(e, p); |
---|
661 | if (p != NULL) { |
---|
662 | oe_set_index(e, p - e->buff); |
---|
663 | d++; |
---|
664 | } |
---|
665 | } |
---|
666 | |
---|
667 | return delta > 0 ? d : -d; |
---|
668 | } |
---|
669 | |
---|
670 | int owl_editwin_at_beginning_of_buffer(owl_editwin *e) { |
---|
671 | if (e->index == e->lock) |
---|
672 | return 1; |
---|
673 | |
---|
674 | return 0; |
---|
675 | } |
---|
676 | |
---|
677 | int owl_at_end_of_buffer(owl_editwin *e) { |
---|
678 | if (e->index == e->bufflen) |
---|
679 | return 1; |
---|
680 | |
---|
681 | return 0; |
---|
682 | } |
---|
683 | |
---|
684 | int owl_editwin_at_beginning_of_line(owl_editwin *e) /*noproto*/ |
---|
685 | { |
---|
686 | oe_excursion x; |
---|
687 | int ret; |
---|
688 | |
---|
689 | if (owl_editwin_at_beginning_of_buffer(e)) |
---|
690 | return 1; |
---|
691 | |
---|
692 | oe_save_excursion(e, &x); |
---|
693 | owl_editwin_point_move(e, -1); |
---|
694 | ret = (owl_editwin_get_char_at_point(e) == '\n'); |
---|
695 | oe_restore_excursion(e, &x); |
---|
696 | |
---|
697 | return ret; |
---|
698 | } |
---|
699 | |
---|
700 | static int owl_editwin_is_char_in(owl_editwin *e, char *set) |
---|
701 | { |
---|
702 | char *p; |
---|
703 | |
---|
704 | for (p = set; *p != 0; p = g_utf8_find_next_char(p, NULL)) |
---|
705 | if (owl_editwin_get_char_at_point(e) == g_utf8_get_char(p)) |
---|
706 | return 1; |
---|
707 | return 0; |
---|
708 | } |
---|
709 | |
---|
710 | int owl_editwin_move_if_in(owl_editwin *e, int delta, char *set) |
---|
711 | { |
---|
712 | int change, distance = 0; |
---|
713 | while (owl_editwin_is_char_in(e, set)) { |
---|
714 | change = owl_editwin_point_move(e, delta); |
---|
715 | distance += change; |
---|
716 | if (change == 0) |
---|
717 | break; |
---|
718 | } |
---|
719 | return distance; |
---|
720 | } |
---|
721 | |
---|
722 | int owl_editwin_move_if_not_in(owl_editwin *e, int delta, char *set) |
---|
723 | { |
---|
724 | int change, distance = 0; |
---|
725 | while (!owl_editwin_is_char_in(e, set)) { |
---|
726 | change = owl_editwin_point_move(e, delta); |
---|
727 | distance += change; |
---|
728 | if (change == 0) |
---|
729 | break; |
---|
730 | } |
---|
731 | return distance; |
---|
732 | } |
---|
733 | |
---|
734 | int owl_editwin_move_to_beginning_of_line(owl_editwin *e) |
---|
735 | { |
---|
736 | int distance = 0; |
---|
737 | |
---|
738 | if (!owl_editwin_at_beginning_of_line(e)) { |
---|
739 | /* move off the \n if were at the end of a line */ |
---|
740 | distance += owl_editwin_point_move(e, -1); |
---|
741 | distance += owl_editwin_move_if_not_in(e, -1, "\n"); |
---|
742 | if (distance && !owl_editwin_at_beginning_of_buffer(e)) |
---|
743 | distance += owl_editwin_point_move(e, 1); |
---|
744 | } |
---|
745 | e->goal_column = 0; /* subtleties */ |
---|
746 | |
---|
747 | return distance; |
---|
748 | } |
---|
749 | |
---|
750 | int owl_editwin_move_to_end_of_line(owl_editwin *e) |
---|
751 | { |
---|
752 | return owl_editwin_move_if_not_in(e, 1, "\n"); |
---|
753 | } |
---|
754 | |
---|
755 | int owl_editwin_line_move(owl_editwin *e, int delta) |
---|
756 | { |
---|
757 | int goal_column, change, ll, distance; |
---|
758 | int count = 0; |
---|
759 | |
---|
760 | change = MAX(delta, -delta); |
---|
761 | |
---|
762 | goal_column = e->goal_column; |
---|
763 | distance = owl_editwin_move_to_beginning_of_line(e); |
---|
764 | goal_column = goal_column == -1 ? -distance : goal_column; |
---|
765 | |
---|
766 | while(count < change) { |
---|
767 | if (delta > 0) { |
---|
768 | distance += owl_editwin_move_if_not_in(e, 1, "\n"); |
---|
769 | distance += owl_editwin_point_move(e, 1); |
---|
770 | } else { |
---|
771 | /* I really want to assert delta < 0 here */ |
---|
772 | distance += owl_editwin_point_move(e, -1); /* to the newline on |
---|
773 | the previous line */ |
---|
774 | distance += owl_editwin_move_to_beginning_of_line(e); |
---|
775 | } |
---|
776 | count++; |
---|
777 | } |
---|
778 | |
---|
779 | distance += (ll = owl_editwin_move_to_end_of_line(e)); |
---|
780 | if (ll > goal_column) |
---|
781 | distance += owl_editwin_point_move(e, goal_column - ll); |
---|
782 | |
---|
783 | e->goal_column = goal_column; |
---|
784 | |
---|
785 | return distance; |
---|
786 | } |
---|
787 | |
---|
788 | void owl_editwin_backspace(owl_editwin *e) |
---|
789 | { |
---|
790 | /* delete the char before the current one |
---|
791 | * and shift later chars left |
---|
792 | */ |
---|
793 | if(owl_editwin_point_move(e, -1)) |
---|
794 | owl_editwin_delete_char(e); |
---|
795 | } |
---|
796 | |
---|
797 | void owl_editwin_key_up(owl_editwin *e) |
---|
798 | { |
---|
799 | owl_editwin_line_move(e, -1); |
---|
800 | } |
---|
801 | |
---|
802 | void owl_editwin_key_down(owl_editwin *e) |
---|
803 | { |
---|
804 | owl_editwin_line_move(e, 1); |
---|
805 | } |
---|
806 | |
---|
807 | void owl_editwin_key_left(owl_editwin *e) |
---|
808 | { |
---|
809 | owl_editwin_point_move(e, -1); |
---|
810 | } |
---|
811 | |
---|
812 | void owl_editwin_key_right(owl_editwin *e) |
---|
813 | { |
---|
814 | owl_editwin_point_move(e, 1); |
---|
815 | } |
---|
816 | |
---|
817 | int owl_editwin_forward_word(owl_editwin *e) |
---|
818 | { |
---|
819 | int distance; |
---|
820 | /* if we're starting on a space, find the first non-space */ |
---|
821 | distance = owl_editwin_move_if_in(e, 1, WHITESPACE); |
---|
822 | |
---|
823 | /* now find the end of this word */ |
---|
824 | distance += owl_editwin_move_if_not_in(e, 1, WHITESPACE); |
---|
825 | |
---|
826 | return distance; |
---|
827 | } |
---|
828 | |
---|
829 | void owl_editwin_move_to_nextword(owl_editwin *e) |
---|
830 | { |
---|
831 | owl_editwin_forward_word(e); |
---|
832 | } |
---|
833 | |
---|
834 | /* go backwards to the last non-space character |
---|
835 | */ |
---|
836 | int owl_editwin_backward_word(owl_editwin *e) |
---|
837 | { |
---|
838 | oe_excursion x; |
---|
839 | int distance = 0; |
---|
840 | int further = 0; |
---|
841 | int beginning; |
---|
842 | /* if in middle of word, beginning of word */ |
---|
843 | |
---|
844 | /* if at beginning of a word, find beginning of previous word */ |
---|
845 | |
---|
846 | if (owl_editwin_is_char_in(e, WHITESPACE)) { |
---|
847 | /* if in whitespace past end of word, find a word , the find the beginning*/ |
---|
848 | distance += owl_editwin_move_if_in(e, -1, WHITESPACE); /* leaves us on the last |
---|
849 | character of the word */ |
---|
850 | oe_save_excursion(e, &x); |
---|
851 | /* are we at the beginning of a word? */ |
---|
852 | owl_editwin_point_move(e, -1); |
---|
853 | beginning = owl_editwin_is_char_in(e, WHITESPACE); |
---|
854 | oe_restore_excursion(e, &x); |
---|
855 | if (beginning) |
---|
856 | return distance; |
---|
857 | } else { |
---|
858 | /* in the middle of the word; */ |
---|
859 | oe_save_excursion(e, &x); |
---|
860 | further += owl_editwin_point_move(e, -1); |
---|
861 | if (owl_editwin_is_char_in(e, WHITESPACE)) { /* we were at the beginning */ |
---|
862 | distance += owl_editwin_backward_word(e); /* previous case */ |
---|
863 | oe_release_excursion(e, &x); |
---|
864 | return distance + further; |
---|
865 | } else { |
---|
866 | oe_restore_excursion(e, &x); |
---|
867 | } |
---|
868 | } |
---|
869 | distance += owl_editwin_move_if_not_in(e, -1, WHITESPACE); |
---|
870 | /* will go past */ |
---|
871 | if (e->index > e->lock) |
---|
872 | distance += owl_editwin_point_move(e, 1); |
---|
873 | return distance; |
---|
874 | } |
---|
875 | |
---|
876 | void owl_editwin_move_to_previousword(owl_editwin *e) |
---|
877 | { |
---|
878 | owl_editwin_backward_word(e); |
---|
879 | } |
---|
880 | |
---|
881 | void owl_editwin_delete_nextword(owl_editwin *e) |
---|
882 | { |
---|
883 | oe_excursion x; |
---|
884 | int distance; |
---|
885 | |
---|
886 | oe_save_excursion(e, &x); |
---|
887 | distance = owl_editwin_forward_word(e); |
---|
888 | oe_restore_excursion(e, &x); |
---|
889 | owl_editwin_replace(e, distance, ""); |
---|
890 | } |
---|
891 | |
---|
892 | void owl_editwin_delete_previousword(owl_editwin *e) |
---|
893 | { |
---|
894 | /* go backwards to the last non-space character, then delete chars */ |
---|
895 | int distance; |
---|
896 | |
---|
897 | distance = owl_editwin_backward_word(e); |
---|
898 | owl_editwin_replace(e, -distance, ""); |
---|
899 | } |
---|
900 | |
---|
901 | void owl_editwin_move_to_line_end(owl_editwin *e) |
---|
902 | { |
---|
903 | owl_editwin_move_to_end_of_line(e); |
---|
904 | } |
---|
905 | |
---|
906 | void owl_editwin_delete_to_endofline(owl_editwin *e) |
---|
907 | { |
---|
908 | oe_excursion x; |
---|
909 | int distance; |
---|
910 | |
---|
911 | oe_save_excursion(e, &x); |
---|
912 | distance = owl_editwin_move_to_end_of_line(e); |
---|
913 | oe_restore_excursion(e, &x); |
---|
914 | owl_editwin_replace(e, distance ? distance : 1, ""); |
---|
915 | } |
---|
916 | |
---|
917 | void owl_editwin_move_to_line_start(owl_editwin *e) |
---|
918 | { |
---|
919 | owl_editwin_move_to_beginning_of_line(e); |
---|
920 | } |
---|
921 | |
---|
922 | void owl_editwin_move_to_end(owl_editwin *e) |
---|
923 | { |
---|
924 | oe_set_index(e, e->bufflen); |
---|
925 | } |
---|
926 | |
---|
927 | void owl_editwin_move_to_top(owl_editwin *e) |
---|
928 | { |
---|
929 | oe_set_index(e, e->lock); |
---|
930 | } |
---|
931 | |
---|
932 | void owl_editwin_fill_paragraph(owl_editwin *e) |
---|
933 | { |
---|
934 | #if 0 /* XXX */ |
---|
935 | oe_excursion x; |
---|
936 | int i, save; |
---|
937 | |
---|
938 | /* save our starting point */ |
---|
939 | oe_save_excursion(e, &x); |
---|
940 | |
---|
941 | save = e->index; |
---|
942 | |
---|
943 | /* scan back to the beginning of this paragraph */ |
---|
944 | for (i=save; i>=e->lock; i--) { |
---|
945 | if ( (i<=e->lock) || |
---|
946 | ((e->buff[i]=='\n') && (e->buff[i-1]=='\n'))) { |
---|
947 | oe_set_index(i + 1); |
---|
948 | break; |
---|
949 | } |
---|
950 | } |
---|
951 | |
---|
952 | /* main loop */ |
---|
953 | while (1) { |
---|
954 | i = _owl_editwin_get_index_from_xy(e); |
---|
955 | |
---|
956 | /* bail if we hit the end of the buffer */ |
---|
957 | if (i >= e->bufflen || e->buff[i] == '\0') break; |
---|
958 | |
---|
959 | /* bail if we hit the end of the paragraph */ |
---|
960 | if (e->buff[i] == '\n' && e->buff[i+1] == '\n') break; |
---|
961 | |
---|
962 | /* bail if we hit a trailing dot on the buffer */ |
---|
963 | if (e->buff[i] == '\n' && e->buff[i+1] == '.' |
---|
964 | && ((i+2) >= e->bufflen || e->buff[i+2] == '\0')) |
---|
965 | break; |
---|
966 | |
---|
967 | /* if we've travelled too far, linewrap */ |
---|
968 | if ((e->buffx) >= e->fillcol) { |
---|
969 | int len = e->bufflen; |
---|
970 | _owl_editwin_linewrap_word(e); |
---|
971 | /* we may have added a character. */ |
---|
972 | if (i < save) save += e->bufflen - len; |
---|
973 | oe_set_index(i); |
---|
974 | } |
---|
975 | |
---|
976 | /* did we hit the end of a line too soon? */ |
---|
977 | /* asedeno: Here we replace a newline with a space. We may want to |
---|
978 | consider removing the space if the characters to either side |
---|
979 | are CJK ideograms.*/ |
---|
980 | i = _owl_editwin_get_index_from_xy(e); |
---|
981 | if (e->buff[i] == '\n' && e->buffx < e->fillcol - 1) { |
---|
982 | /* ********* we need to make sure we don't pull in a word that's too long ***********/ |
---|
983 | e->buff[i]=' '; |
---|
984 | } |
---|
985 | |
---|
986 | /* fix spacing */ |
---|
987 | i = _owl_editwin_get_index_from_xy(e); |
---|
988 | if (e->buff[i] == ' ' && e->buff[i+1] == ' ') { |
---|
989 | if (e->buff[i-1] == '.' || e->buff[i-1] == '!' || e->buff[i-1] == '?') { |
---|
990 | owl_editwin_key_right(e); |
---|
991 | } else { |
---|
992 | owl_editwin_delete_char(e); |
---|
993 | /* if we did this ahead of the save point, adjust it. Changing |
---|
994 | by one is fine here because we're only removing an ASCII |
---|
995 | space. */ |
---|
996 | if (i < save) save--; |
---|
997 | } |
---|
998 | } else { |
---|
999 | owl_editwin_key_right(e); |
---|
1000 | } |
---|
1001 | } |
---|
1002 | |
---|
1003 | /* put cursor back at starting point */ |
---|
1004 | oe_restore_excursion(e, &x); |
---|
1005 | #endif |
---|
1006 | } |
---|
1007 | |
---|
1008 | /* returns true if only whitespace remains */ |
---|
1009 | int owl_editwin_is_at_end(owl_editwin *e) |
---|
1010 | { |
---|
1011 | return (only_whitespace(e->buff + e->index)); |
---|
1012 | } |
---|
1013 | |
---|
1014 | static int owl_editwin_check_dotsend(owl_editwin *e) |
---|
1015 | { |
---|
1016 | char *p, *p_n, *p_p; |
---|
1017 | gunichar c; |
---|
1018 | |
---|
1019 | if (!e->dotsend) return(0); |
---|
1020 | |
---|
1021 | p = g_utf8_find_prev_char(e->buff, e->buff + e->bufflen); |
---|
1022 | p_n = g_utf8_find_next_char(p, NULL); |
---|
1023 | p_p = g_utf8_find_prev_char(e->buff, p); |
---|
1024 | c = g_utf8_get_char(p); |
---|
1025 | while (p != NULL) { |
---|
1026 | if (*p == '.' |
---|
1027 | && p_p != NULL && (*p_p == '\n' || *p_p == '\r') |
---|
1028 | && p_n != NULL && (*p_n == '\n' || *p_n == '\r')) { |
---|
1029 | e->bufflen = p - e->buff; |
---|
1030 | e->buff[e->bufflen] = '\0'; |
---|
1031 | return(1); |
---|
1032 | } |
---|
1033 | if (c != '\0' && !g_unichar_isspace(c)) return(0); |
---|
1034 | p_n = p; |
---|
1035 | p = p_p; |
---|
1036 | c = g_utf8_get_char(p); |
---|
1037 | p_p = g_utf8_find_prev_char(e->buff, p); |
---|
1038 | } |
---|
1039 | return(0); |
---|
1040 | } |
---|
1041 | |
---|
1042 | void owl_editwin_post_process_char(owl_editwin *e, owl_input j) |
---|
1043 | { |
---|
1044 | /* XXX force a redisplay? */ |
---|
1045 | if ((j.ch==13 || j.ch==10) && owl_editwin_check_dotsend(e)) { |
---|
1046 | owl_command_editmulti_done(e); |
---|
1047 | return; |
---|
1048 | } |
---|
1049 | owl_editwin_redisplay(e, 0); |
---|
1050 | } |
---|
1051 | |
---|
1052 | static int oe_region_width(owl_editwin *e, int start, int end, int width) |
---|
1053 | { |
---|
1054 | char *p; |
---|
1055 | for(p = e->buff + start; |
---|
1056 | p < e->buff + end; |
---|
1057 | p = g_utf8_find_next_char(p, NULL)) |
---|
1058 | width += oe_char_width(g_utf8_get_char(p), width); |
---|
1059 | |
---|
1060 | return width; |
---|
1061 | } |
---|
1062 | |
---|
1063 | static void oe_insert_char(owl_editwin *e, gunichar c) |
---|
1064 | { |
---|
1065 | oe_excursion x; |
---|
1066 | char tmp[7]; |
---|
1067 | int replaced = -1; |
---|
1068 | |
---|
1069 | if (c == '\r') /* translate CRs to NLs */ |
---|
1070 | c = '\n'; |
---|
1071 | |
---|
1072 | if (!g_unichar_iscntrl(c) || c == '\n' || c== '\t' ) { |
---|
1073 | memset(tmp, 0, 7); |
---|
1074 | |
---|
1075 | if (c == '\n' && e->style == OWL_EDITWIN_STYLE_ONELINE) { |
---|
1076 | return; |
---|
1077 | } |
---|
1078 | |
---|
1079 | if (e->cursorx != -1 && e->cursorx + oe_char_width(c, e->cursorx) > e->wrapcol) { |
---|
1080 | /* XXX this is actually wrong: |
---|
1081 | * + If the line has been been wrapped, we can be past the wrap column but |
---|
1082 | * e->cursorx be much smaller. |
---|
1083 | * + If the user went back and inserted a bunch of stuff in the middle of |
---|
1084 | * the line, there may be more than one word past the wrap column. |
---|
1085 | */ |
---|
1086 | oe_save_excursion(e, &x); |
---|
1087 | |
---|
1088 | if (c == ' ' || c == '\t') { |
---|
1089 | owl_editwin_point_move(e, -1); |
---|
1090 | replaced = -owl_editwin_move_if_in(e, -1, " \t"); |
---|
1091 | if (!replaced) { |
---|
1092 | c = '\n'; |
---|
1093 | replaced = -1; |
---|
1094 | } |
---|
1095 | } else { |
---|
1096 | while(!owl_editwin_at_beginning_of_line(e)) { |
---|
1097 | owl_editwin_point_move(e, -1); |
---|
1098 | if (owl_util_can_break_after(owl_editwin_get_char_at_point(e))) { |
---|
1099 | replaced = -owl_editwin_move_if_in(e, -1, " \t"); |
---|
1100 | break; |
---|
1101 | } |
---|
1102 | } |
---|
1103 | if (owl_editwin_at_beginning_of_line(e)) |
---|
1104 | replaced = -1; |
---|
1105 | } |
---|
1106 | if (replaced && !owl_editwin_at_beginning_of_line(e)) |
---|
1107 | owl_editwin_point_move(e, 1); |
---|
1108 | if (replaced >= 0) { |
---|
1109 | owl_editwin_replace(e, replaced, "\n"); |
---|
1110 | } |
---|
1111 | |
---|
1112 | oe_restore_excursion(e, &x); |
---|
1113 | } |
---|
1114 | |
---|
1115 | if (replaced >= 0 && (c == ' ' || c == '\t')) |
---|
1116 | return; /* our work here is done */ |
---|
1117 | |
---|
1118 | g_unichar_to_utf8(c, tmp); |
---|
1119 | owl_editwin_replace(e, 0, tmp); |
---|
1120 | } |
---|
1121 | } |
---|
1122 | |
---|
1123 | void owl_editwin_process_char(owl_editwin *e, owl_input j) |
---|
1124 | { |
---|
1125 | if (j.ch == ERR) |
---|
1126 | return; |
---|
1127 | /* Ignore ncurses control characters. */ |
---|
1128 | if (j.ch < 0x100) { |
---|
1129 | oe_insert_char(e, j.uch); |
---|
1130 | } |
---|
1131 | } |
---|
1132 | |
---|
1133 | char *owl_editwin_get_text(owl_editwin *e) |
---|
1134 | { |
---|
1135 | return(e->buff+e->lock); |
---|
1136 | } |
---|
1137 | |
---|
1138 | int owl_editwin_get_echochar(owl_editwin *e) { |
---|
1139 | return e->echochar; |
---|
1140 | } |
---|
1141 | |
---|
1142 | |
---|
1143 | /* |
---|
1144 | * Local Variables: |
---|
1145 | * mode:C |
---|
1146 | * c-basic-offset:2 |
---|
1147 | * End: |
---|
1148 | */ |
---|