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 | #define VALID_EXCURSION (0x9a2b4729) |
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8 | |
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9 | typedef struct _owl_editwin_excursion { /*noproto*/ |
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10 | int valid; |
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11 | int index; |
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12 | int mark; |
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13 | int goal_column; |
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14 | int lock; |
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15 | struct _owl_editwin_excursion *next; |
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16 | } oe_excursion; |
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17 | |
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18 | struct _owl_editwin { /*noproto*/ |
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19 | int refcount; |
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20 | char *buff; |
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21 | owl_history *hist; |
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22 | int bufflen; |
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23 | int allocated; |
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24 | int index; |
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25 | int mark; |
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26 | int goal_column; |
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27 | int topindex; |
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28 | int column; |
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29 | int winlines, wincols, fillcol, wrapcol; |
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30 | owl_window *win; |
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31 | gulong repaint_id; |
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32 | gulong resized_id; |
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33 | int style; |
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34 | int lock; |
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35 | int dotsend; |
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36 | int echochar; |
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37 | oe_excursion *excursions; |
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38 | |
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39 | void (*callback)(struct _owl_editwin*); |
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40 | void (*destroy_cbdata)(void *); |
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41 | void *cbdata; |
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42 | }; |
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43 | |
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44 | static void oe_set_window(owl_editwin *e, owl_window *w, int winlines, int wincols); |
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45 | static void oe_redraw(owl_window *win, WINDOW *curswin, void *user_data); |
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46 | static void oe_reframe(owl_editwin *e); |
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47 | static void oe_save_excursion(owl_editwin *e, oe_excursion *x); |
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48 | static void oe_release_excursion(owl_editwin *e, oe_excursion *x); |
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49 | static void oe_restore_excursion(owl_editwin *e, oe_excursion *x); |
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50 | static void oe_restore_mark_only(owl_editwin *e, oe_excursion *x); |
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51 | static int oe_char_width(gunichar c, int column); |
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52 | static int oe_region_column(owl_editwin *e, int start, int end, int offset); |
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53 | static int oe_region_width(owl_editwin *e, int start, int end, int offset); |
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54 | static int oe_find_display_line(owl_editwin *e, int *x, int index, int *hard); |
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55 | static void oe_insert_char(owl_editwin *e, gunichar c); |
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56 | static int owl_editwin_limit_maxcols(int width, int cols); |
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57 | static int owl_editwin_check_dotsend(owl_editwin *e); |
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58 | static int owl_editwin_is_char_in(owl_editwin *e, const char *set); |
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59 | static gunichar owl_editwin_get_char_at_point(owl_editwin *e); |
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60 | static int owl_editwin_replace_internal(owl_editwin *e, int replace, const char *s); |
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61 | static const char *oe_copy_buf(owl_editwin *e, const char *buf, int len); |
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62 | static int oe_copy_region(owl_editwin *e); |
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63 | static CALLER_OWN char *oe_chunk(owl_editwin *e, int start, int end); |
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64 | static void oe_destroy_cbdata(owl_editwin *e); |
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65 | static void oe_dirty(owl_editwin *e); |
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66 | static void oe_window_resized(owl_window *w, owl_editwin *e); |
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67 | |
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68 | #define INCR 4096 |
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69 | |
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70 | #define WHITESPACE " \n\t" |
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71 | |
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72 | static CALLER_OWN owl_editwin *owl_editwin_allocate(void) |
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73 | { |
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74 | owl_editwin *e = g_new0(owl_editwin, 1); |
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75 | e->refcount = 1; |
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76 | return e; |
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77 | } |
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78 | |
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79 | static void _owl_editwin_delete(owl_editwin *e) |
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80 | { |
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81 | if (e->win) { |
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82 | g_signal_handler_disconnect(e->win, e->repaint_id); |
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83 | g_signal_handler_disconnect(e->win, e->resized_id); |
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84 | g_object_unref(e->win); |
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85 | } |
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86 | g_free(e->buff); |
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87 | /* just in case someone forgot to clean up */ |
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88 | while (e->excursions) { |
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89 | oe_release_excursion(e, e->excursions); |
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90 | } |
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91 | oe_destroy_cbdata(e); |
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92 | |
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93 | g_free(e); |
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94 | } |
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95 | |
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96 | static inline void oe_set_index(owl_editwin *e, int index) |
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97 | { |
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98 | if (index != e->index) { |
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99 | e->goal_column = -1; |
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100 | e->column = -1; |
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101 | } |
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102 | e->index = index; |
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103 | oe_dirty(e); |
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104 | } |
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105 | |
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106 | static inline void oe_set_mark(owl_editwin *e, int mark) |
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107 | { |
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108 | e->mark = mark; |
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109 | } |
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110 | |
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111 | void owl_editwin_set_mark(owl_editwin *e) |
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112 | { |
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113 | oe_set_mark(e, e->index); |
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114 | /* owl_function_makemsg("Mark set."); */ |
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115 | } |
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116 | |
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117 | static void _owl_editwin_init(owl_editwin *e, |
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118 | int winlines, |
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119 | int wincols, |
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120 | int style, |
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121 | owl_history *hist) |
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122 | { |
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123 | e->buff=g_new(char, INCR); |
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124 | e->buff[0]='\0'; |
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125 | e->bufflen=0; |
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126 | e->hist=hist; |
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127 | e->allocated=INCR; |
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128 | oe_set_index(e, 0); |
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129 | oe_set_mark(e, -1); |
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130 | e->goal_column = -1; |
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131 | e->column = -1; |
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132 | e->topindex = 0; |
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133 | e->excursions = NULL; |
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134 | e->style=style; |
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135 | if ((style!=OWL_EDITWIN_STYLE_MULTILINE) && |
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136 | (style!=OWL_EDITWIN_STYLE_ONELINE)) { |
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137 | e->style=OWL_EDITWIN_STYLE_MULTILINE; |
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138 | } |
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139 | e->lock=0; |
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140 | e->dotsend=0; |
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141 | e->echochar='\0'; |
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142 | } |
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143 | |
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144 | CALLER_OWN owl_editwin *owl_editwin_new(owl_window *win, int winlines, int wincols, int style, owl_history *hist) |
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145 | { |
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146 | owl_editwin *e = owl_editwin_allocate(); |
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147 | |
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148 | _owl_editwin_init(e, winlines, wincols, style, hist); |
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149 | oe_set_window(e, win, winlines, wincols); |
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150 | return e; |
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151 | } |
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152 | |
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153 | owl_editwin *owl_editwin_ref(owl_editwin *e) |
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154 | { |
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155 | e->refcount++; |
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156 | return e; |
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157 | } |
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158 | |
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159 | void owl_editwin_unref(owl_editwin *e) |
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160 | { |
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161 | e->refcount--; |
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162 | if (e->refcount <= 0) |
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163 | _owl_editwin_delete(e); |
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164 | } |
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165 | |
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166 | /* TODO: collapse this window into oe_window_resized. Need to stop |
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167 | * passing winlines and wincols to oe_set_window and get them out of |
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168 | * the owl_window. The tester code will first need to pass in an |
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169 | * owl_window headless or so. */ |
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170 | static void oe_set_window_size(owl_editwin *e, int winlines, int wincols) |
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171 | { |
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172 | e->winlines=winlines; |
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173 | e->wincols=wincols; |
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174 | /* fillcol and wrapcol may have changed. */ |
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175 | e->fillcol=owl_editwin_limit_maxcols(wincols-7, owl_global_get_edit_maxfillcols(&g)); |
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176 | if (e->style == OWL_EDITWIN_STYLE_MULTILINE) |
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177 | e->wrapcol=owl_editwin_limit_maxcols(wincols-7, owl_global_get_edit_maxwrapcols(&g)); |
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178 | else |
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179 | e->wrapcol = 0; |
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180 | } |
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181 | |
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182 | static void oe_window_resized(owl_window *w, owl_editwin *e) |
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183 | { |
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184 | int winlines, wincols; |
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185 | owl_window_get_position(w, &winlines, &wincols, NULL, NULL); |
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186 | oe_set_window_size(e, winlines, wincols); |
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187 | } |
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188 | |
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189 | static void oe_set_window(owl_editwin *e, owl_window *w, int winlines, int wincols) |
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190 | { |
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191 | e->win=w; |
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192 | oe_set_window_size(e, winlines, wincols); |
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193 | if (e->win) { |
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194 | g_object_ref(e->win); |
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195 | e->repaint_id = g_signal_connect(w, "redraw", G_CALLBACK(oe_redraw), e); |
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196 | e->resized_id = g_signal_connect(w, "resized", G_CALLBACK(oe_window_resized), e); |
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197 | owl_window_dirty(e->win); |
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198 | } |
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199 | } |
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200 | |
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201 | owl_window *owl_editwin_get_window(owl_editwin *e) |
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202 | { |
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203 | return e->win; |
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204 | } |
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205 | |
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206 | /* echo the character 'ch' for each normal character keystroke, |
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207 | * excepting locktext. This is useful for entering passwords etc. If |
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208 | * ch=='\0' characters are echo'd normally |
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209 | */ |
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210 | void owl_editwin_set_echochar(owl_editwin *e, int ch) |
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211 | { |
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212 | e->echochar=ch; |
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213 | oe_dirty(e); |
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214 | } |
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215 | |
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216 | owl_history *owl_editwin_get_history(owl_editwin *e) |
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217 | { |
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218 | return(e->hist); |
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219 | } |
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220 | |
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221 | void owl_editwin_set_dotsend(owl_editwin *e) |
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222 | { |
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223 | e->dotsend=1; |
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224 | } |
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225 | |
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226 | void owl_editwin_set_callback(owl_editwin *e, void (*cb)(owl_editwin*)) |
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227 | { |
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228 | e->callback = cb; |
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229 | } |
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230 | |
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231 | void (*owl_editwin_get_callback(owl_editwin *e))(owl_editwin*) |
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232 | { |
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233 | return e->callback; |
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234 | } |
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235 | |
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236 | static void oe_destroy_cbdata(owl_editwin *e) { |
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237 | if (e->destroy_cbdata) |
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238 | e->destroy_cbdata(e->cbdata); |
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239 | e->cbdata = NULL; |
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240 | e->destroy_cbdata = NULL; |
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241 | } |
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242 | |
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243 | void owl_editwin_set_cbdata(owl_editwin *e, void *data, void (*destroy)(void *)) |
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244 | { |
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245 | oe_destroy_cbdata(e); |
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246 | e->cbdata = data; |
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247 | e->destroy_cbdata = destroy; |
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248 | } |
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249 | |
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250 | void *owl_editwin_get_cbdata(owl_editwin *e) { |
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251 | return e->cbdata; |
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252 | } |
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253 | |
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254 | void owl_editwin_do_callback(owl_editwin *e) { |
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255 | void (*cb)(owl_editwin*); |
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256 | cb=owl_editwin_get_callback(e); |
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257 | if(!cb) { |
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258 | owl_function_error("Internal error: No editwin callback!"); |
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259 | } else { |
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260 | /* owl_function_error("text: |%s|", owl_editwin_get_text(e)); */ |
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261 | cb(e); |
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262 | } |
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263 | } |
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264 | |
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265 | static int owl_editwin_limit_maxcols(int width, int cols) |
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266 | { |
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267 | if (cols == 0) |
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268 | return width; |
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269 | return cols; |
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270 | } |
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271 | |
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272 | /* set text to be 'locked in' at the beginning of the buffer, any |
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273 | * previous text (including locked text) will be overwritten |
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274 | */ |
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275 | void owl_editwin_set_locktext(owl_editwin *e, const char *text) |
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276 | { |
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277 | oe_set_index(e, 0); |
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278 | e->lock = 0; |
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279 | owl_editwin_replace(e, e->bufflen, text); |
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280 | e->buff[e->bufflen] = 0; |
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281 | e->lock=e->bufflen; |
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282 | oe_set_index(e, e->lock); |
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283 | oe_dirty(e); |
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284 | } |
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285 | |
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286 | int owl_editwin_get_style(owl_editwin *e) |
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287 | { |
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288 | return(e->style); |
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289 | } |
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290 | |
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291 | /* clear all text except for locktext and put the cursor at the |
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292 | * beginning |
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293 | */ |
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294 | void owl_editwin_clear(owl_editwin *e) |
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295 | { |
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296 | |
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297 | int lock = e->lock; |
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298 | int dotsend=e->dotsend; |
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299 | char *locktext=NULL; |
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300 | char echochar=e->echochar; |
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301 | |
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302 | if (lock > 0) { |
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303 | locktext = g_strndup(e->buff, lock); |
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304 | } |
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305 | |
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306 | g_free(e->buff); |
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307 | _owl_editwin_init(e, e->winlines, e->wincols, e->style, e->hist); |
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308 | |
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309 | if (lock > 0) { |
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310 | owl_editwin_set_locktext(e, locktext); |
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311 | } |
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312 | if (dotsend) { |
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313 | owl_editwin_set_dotsend(e); |
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314 | } |
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315 | if (echochar) { |
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316 | owl_editwin_set_echochar(e, echochar); |
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317 | } |
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318 | |
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319 | g_free(locktext); |
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320 | |
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321 | oe_set_index(e, lock); |
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322 | } |
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323 | |
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324 | void owl_editwin_recenter(owl_editwin *e) |
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325 | { |
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326 | e->topindex = -1; |
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327 | oe_dirty(e); |
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328 | } |
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329 | |
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330 | static void oe_save_excursion(owl_editwin *e, oe_excursion *x) |
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331 | { |
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332 | x->index = e->index; |
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333 | x->mark = e->mark; |
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334 | x->goal_column = e->goal_column; |
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335 | x->lock = e->lock; |
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336 | |
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337 | x->valid = VALID_EXCURSION; |
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338 | x->next = e->excursions; |
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339 | e->excursions = x; |
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340 | } |
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341 | |
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342 | static void oe_release_excursion(owl_editwin *e, oe_excursion *x) |
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343 | { |
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344 | oe_excursion **px; |
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345 | |
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346 | x->valid = 0; |
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347 | for (px = &e->excursions; *px != NULL; px = &(*px)->next) |
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348 | if (*px == x) { |
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349 | *px = x->next; |
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350 | return; |
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351 | } |
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352 | abort(); |
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353 | } |
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354 | |
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355 | static void oe_restore_excursion(owl_editwin *e, oe_excursion *x) |
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356 | { |
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357 | if (x->valid == VALID_EXCURSION) { |
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358 | oe_set_index(e, x->index); |
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359 | e->goal_column = x->goal_column; |
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360 | e->mark = x->mark; |
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361 | e->lock = x->lock; |
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362 | |
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363 | oe_release_excursion(e, x); |
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364 | } |
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365 | } |
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366 | |
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367 | static void oe_restore_mark_only(owl_editwin *e, oe_excursion *x) |
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368 | { |
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369 | if (x->valid == VALID_EXCURSION) { |
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370 | e->mark = x->mark; |
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371 | |
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372 | oe_release_excursion(e, x); |
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373 | } |
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374 | } |
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375 | |
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376 | /* External interface to oe_save_excursion */ |
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377 | owl_editwin_excursion *owl_editwin_begin_excursion(owl_editwin *e) |
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378 | { |
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379 | owl_editwin_excursion *x = g_new(owl_editwin_excursion, 1); |
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380 | oe_save_excursion(e, x); |
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381 | return x; |
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382 | } |
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383 | |
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384 | void owl_editwin_end_excursion(owl_editwin *e, owl_editwin_excursion *x) |
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385 | { |
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386 | oe_restore_excursion(e, x); |
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387 | g_free(x); |
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388 | } |
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389 | |
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390 | static inline const char *oe_next_point(owl_editwin *e, const char *p) |
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391 | { |
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392 | const char *boundary = e->buff + e->bufflen + 1; |
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393 | const char *q; |
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394 | |
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395 | q = g_utf8_find_next_char(p, boundary); |
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396 | while (q && g_unichar_ismark(g_utf8_get_char(q))) |
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397 | q = g_utf8_find_next_char(q, boundary); |
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398 | |
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399 | if (q == p) |
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400 | return NULL; |
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401 | return q; |
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402 | } |
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403 | |
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404 | static inline const char *oe_prev_point(owl_editwin *e, const char *p) |
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405 | { |
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406 | const char *boundary = e->buff + e->lock; |
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407 | |
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408 | p = g_utf8_find_prev_char(boundary, p); |
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409 | while (p && g_unichar_ismark(g_utf8_get_char(p))) |
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410 | p = g_utf8_find_prev_char(boundary, p); |
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411 | |
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412 | return p; |
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413 | } |
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414 | |
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415 | static int oe_char_width(gunichar c, int column) |
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416 | { |
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417 | int cw; |
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418 | |
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419 | if (c == 9) /* TAB */ |
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420 | return TABSIZE - column % TABSIZE; |
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421 | |
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422 | cw = mk_wcwidth(c); |
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423 | |
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424 | if (cw < 0) /* control characters */ |
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425 | cw = 0; |
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426 | |
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427 | return cw; |
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428 | } |
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429 | |
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430 | /* Finds the display line of 'e' starting at the character |
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431 | * 'index'. The index just after the line is returned. Whether the |
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432 | * line ends at a hard break (newline) or soft break (wrapping) is |
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433 | * returned in 'hard'. |
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434 | * |
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435 | * If the point (e->index) is contained in the line, its position is |
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436 | * returned in 'x'. |
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437 | */ |
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438 | static int oe_find_display_line(owl_editwin *e, int *x, int index, int *hard) |
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439 | { |
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440 | int width = 0, cw; |
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441 | gunichar c; |
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442 | const char *p; |
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443 | |
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444 | while(1) { |
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445 | /* note the position of the dot */ |
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446 | if (x != NULL && index == e->index && width < e->wincols) |
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447 | *x = width; |
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448 | |
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449 | /* get the current character */ |
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450 | c = g_utf8_get_char(e->buff + index); |
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451 | |
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452 | /* figure out how wide it is */ |
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453 | cw = oe_char_width(c, width); |
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454 | |
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455 | if (width + cw > e->wincols - 1) { |
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456 | if (x != NULL && *x == width) |
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457 | *x = -1; |
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458 | if (hard != NULL) *hard = 0; |
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459 | break; |
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460 | } |
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461 | width += cw; |
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462 | |
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463 | if (c == '\n') { |
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464 | if (width < e->wincols) |
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465 | ++index; /* skip the newline */ |
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466 | if (hard != NULL) *hard = 1; |
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467 | break; |
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468 | } |
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469 | |
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470 | /* find the next character */ |
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471 | p = oe_next_point(e, e->buff + index); |
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472 | if (p == NULL) { /* we ran off the end */ |
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473 | if (x != NULL && e->index > index) |
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474 | *x = width + 1; |
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475 | if (hard != NULL) *hard = 1; |
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476 | break; |
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477 | } |
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478 | index = p - e->buff; |
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479 | |
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480 | } |
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481 | return index; |
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482 | } |
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483 | |
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484 | static void oe_reframe(owl_editwin *e) { |
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485 | oe_excursion x; |
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486 | int goal = 1 + e->winlines / 2; |
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487 | int index; |
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488 | int count = 0; |
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489 | int n, i; |
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490 | int last; |
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491 | |
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492 | oe_save_excursion(e, &x); |
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493 | /* step back line-by-line through the buffer until we have >= goal lines of |
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494 | display text */ |
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495 | e->lock = 0; /* we can (must) tread on the locktext */ |
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496 | |
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497 | last = -1; |
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498 | while (count < goal) { |
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499 | index = e->index; |
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500 | owl_editwin_move_to_beginning_of_line(e); |
---|
501 | if (last == e->index) |
---|
502 | break; |
---|
503 | last = e->index; |
---|
504 | for (n = 0, i = e->index; i < index; n++) |
---|
505 | i = oe_find_display_line(e, NULL, i, NULL); |
---|
506 | count += n == 0 ? 1 : n; |
---|
507 | if (count < goal) |
---|
508 | owl_editwin_point_move(e, -1); |
---|
509 | } |
---|
510 | |
---|
511 | e->topindex = e->index; |
---|
512 | /* if we overshot, backtrack */ |
---|
513 | for (n = 0; n < (count - goal); n++) |
---|
514 | e->topindex = oe_find_display_line(e, NULL, e->topindex, NULL); |
---|
515 | |
---|
516 | oe_restore_excursion(e, &x); |
---|
517 | oe_dirty(e); |
---|
518 | } |
---|
519 | |
---|
520 | static void oe_addnec(owl_editwin *e, WINDOW *curswin, int count) |
---|
521 | { |
---|
522 | int i; |
---|
523 | |
---|
524 | for (i = 0; i < count; i++) |
---|
525 | waddch(curswin, e->echochar); |
---|
526 | } |
---|
527 | |
---|
528 | static void oe_mvaddnec(owl_editwin *e, WINDOW *curswin, int y, int x, int count) |
---|
529 | { |
---|
530 | wmove(curswin, y, x); |
---|
531 | oe_addnec(e, curswin, count); |
---|
532 | } |
---|
533 | |
---|
534 | /* regenerate the text on the curses window */ |
---|
535 | static void oe_redraw(owl_window *win, WINDOW *curswin, void *user_data) |
---|
536 | { |
---|
537 | int x = -1, y = -1, t, hard; |
---|
538 | int line, index, lineindex, times = 0; |
---|
539 | owl_editwin *e = user_data; |
---|
540 | |
---|
541 | do { |
---|
542 | werase(curswin); |
---|
543 | |
---|
544 | if (e->topindex == -1 || e->index < e->topindex) |
---|
545 | oe_reframe(e); |
---|
546 | |
---|
547 | line = 0; |
---|
548 | index = e->topindex; |
---|
549 | while(line < e->winlines) { |
---|
550 | lineindex = index; |
---|
551 | t = -1; |
---|
552 | index = oe_find_display_line(e, &t, lineindex, &hard); |
---|
553 | if (x == -1 && t != -1) |
---|
554 | x = t, y = line; |
---|
555 | if (index - lineindex) { |
---|
556 | if (!e->echochar) |
---|
557 | mvwaddnstr(curswin, line, 0, |
---|
558 | e->buff + lineindex, |
---|
559 | index - lineindex); |
---|
560 | else { |
---|
561 | if(lineindex < e->lock) { |
---|
562 | mvwaddnstr(curswin, line, 0, |
---|
563 | e->buff + lineindex, |
---|
564 | MIN(index - lineindex, |
---|
565 | e->lock - lineindex)); |
---|
566 | if (e->lock < index) |
---|
567 | oe_addnec(e, curswin, |
---|
568 | oe_region_width(e, e->lock, index, |
---|
569 | oe_region_width(e, lineindex, e->lock, 0))); |
---|
570 | } else |
---|
571 | oe_mvaddnec(e, curswin, line, 0, oe_region_width(e, lineindex, index, 0)); |
---|
572 | } |
---|
573 | if (!hard) |
---|
574 | waddch(curswin, '\\'); |
---|
575 | } |
---|
576 | line++; |
---|
577 | } |
---|
578 | if (x == -1) |
---|
579 | e->topindex = -1; /* force a reframe */ |
---|
580 | times++; |
---|
581 | } while(x == -1 && times < 3); |
---|
582 | |
---|
583 | wmove(curswin, y, x); |
---|
584 | } |
---|
585 | |
---|
586 | static inline void oe_fixup(int *target, int start, int end, int change) { |
---|
587 | if (*target > start) { |
---|
588 | if (*target <= end) |
---|
589 | *target = end + change; |
---|
590 | else |
---|
591 | *target += change; |
---|
592 | } |
---|
593 | } |
---|
594 | |
---|
595 | int owl_editwin_replace_region(owl_editwin *e, const char *s) |
---|
596 | { |
---|
597 | oe_excursion x; |
---|
598 | int ret; |
---|
599 | |
---|
600 | if (e->mark == -1) { |
---|
601 | owl_function_error("The mark is unset, there is no region to replace."); |
---|
602 | return 0; |
---|
603 | } |
---|
604 | |
---|
605 | oe_save_excursion(e, &x); |
---|
606 | |
---|
607 | if(e->index > e->mark) { |
---|
608 | owl_editwin_exchange_point_and_mark(e); |
---|
609 | } |
---|
610 | |
---|
611 | ret = owl_editwin_replace_internal(e, e->mark - e->index, s); |
---|
612 | |
---|
613 | oe_restore_excursion(e, &x); |
---|
614 | |
---|
615 | return ret; |
---|
616 | } |
---|
617 | |
---|
618 | /* replace 'replace' characters at the point with s, returning the change in size */ |
---|
619 | int owl_editwin_replace(owl_editwin *e, int replace, const char *s) |
---|
620 | { |
---|
621 | int start, end, i; |
---|
622 | const char *p; |
---|
623 | |
---|
624 | if (!g_utf8_validate(s, -1, NULL)) { |
---|
625 | owl_function_debugmsg("owl_editwin_insert_string: received non-utf-8 string."); |
---|
626 | return 0; |
---|
627 | } |
---|
628 | |
---|
629 | start = e->index; |
---|
630 | for (i = 0, p = e->buff + start; i < replace && p != NULL; i++) |
---|
631 | p = oe_next_point(e, p); |
---|
632 | if (p != NULL) |
---|
633 | end = p - e->buff; |
---|
634 | else |
---|
635 | end = e->bufflen; |
---|
636 | |
---|
637 | return owl_editwin_replace_internal(e, end - start, s); |
---|
638 | } |
---|
639 | |
---|
640 | static int owl_editwin_replace_internal(owl_editwin *e, int replace, const char *s) |
---|
641 | { |
---|
642 | int start, end, free, need, size, change, oldindex; |
---|
643 | oe_excursion *x; |
---|
644 | |
---|
645 | start = e->index; |
---|
646 | end = start + replace; |
---|
647 | |
---|
648 | free = e->allocated - e->bufflen + end - start; |
---|
649 | |
---|
650 | need = strlen(s) - free; |
---|
651 | if (need > 0) { |
---|
652 | size = e->allocated + need + INCR - (need % INCR); |
---|
653 | e->buff = g_renew(char, e->buff, size); |
---|
654 | e->allocated = size; |
---|
655 | } |
---|
656 | |
---|
657 | memmove(e->buff + start + strlen(s), e->buff + end, e->bufflen + 1 - end); |
---|
658 | memcpy(e->buff + start, s, strlen(s)); |
---|
659 | change = start - end + strlen(s); |
---|
660 | e->bufflen += change; |
---|
661 | oldindex = e->index; |
---|
662 | e->index += strlen(s); |
---|
663 | if (e->column != -1) |
---|
664 | e->column = oe_region_column(e, oldindex, e->index, e->column); |
---|
665 | |
---|
666 | /* fix up the mark */ |
---|
667 | oe_fixup(&e->mark, start, end, change); |
---|
668 | oe_fixup(&e->topindex, start, end, change); |
---|
669 | /* fix up any saved points after the replaced area */ |
---|
670 | for (x = e->excursions; x != NULL; x = x->next) { |
---|
671 | oe_fixup(&x->index, start, end, change); |
---|
672 | oe_fixup(&x->mark, start, end, change); |
---|
673 | } |
---|
674 | |
---|
675 | /* recenter if needed */ |
---|
676 | if (start <= e->topindex) |
---|
677 | owl_editwin_recenter(e); |
---|
678 | |
---|
679 | oe_dirty(e); |
---|
680 | |
---|
681 | return change; |
---|
682 | } |
---|
683 | |
---|
684 | /* linewrap the word just before the cursor. |
---|
685 | * returns 0 on success |
---|
686 | * returns -1 if we could not wrap. |
---|
687 | */ |
---|
688 | static void _owl_editwin_linewrap_word(owl_editwin *e) |
---|
689 | { |
---|
690 | oe_excursion x; |
---|
691 | gunichar c; |
---|
692 | |
---|
693 | oe_save_excursion(e, &x); |
---|
694 | |
---|
695 | while (owl_editwin_point_move(e, -1)) { |
---|
696 | c = owl_editwin_get_char_at_point(e); |
---|
697 | if (owl_util_can_break_after(c) || c == '\n') { |
---|
698 | if (c != '\n') |
---|
699 | owl_editwin_replace(e, c != ' ' ? 0 : 1, "\n"); |
---|
700 | break; |
---|
701 | } |
---|
702 | } |
---|
703 | |
---|
704 | oe_restore_excursion(e, &x); |
---|
705 | } |
---|
706 | |
---|
707 | /* delete the character at the current point, following chars |
---|
708 | * shift left. |
---|
709 | */ |
---|
710 | void owl_editwin_delete_char(owl_editwin *e) |
---|
711 | { |
---|
712 | owl_editwin_replace(e, 1, ""); |
---|
713 | } |
---|
714 | |
---|
715 | /* Swap the character at point with the character at point-1 and |
---|
716 | * advance the pointer. If point is at beginning of buffer do |
---|
717 | * nothing. If point is after the last character swap point-1 with |
---|
718 | * point-2. (Behaves as observed in tcsh and emacs). |
---|
719 | */ |
---|
720 | void owl_editwin_transpose_chars(owl_editwin *e) |
---|
721 | { |
---|
722 | const char *middle, *end, *start; |
---|
723 | char *tmp; |
---|
724 | |
---|
725 | if (e->bufflen == 0) return; |
---|
726 | |
---|
727 | if (e->index == e->bufflen) |
---|
728 | owl_editwin_point_move(e, -1); /* point is after last character */ |
---|
729 | |
---|
730 | if (owl_editwin_at_beginning_of_buffer(e)) |
---|
731 | return; /* point is at beginning of buffer, do nothing */ |
---|
732 | |
---|
733 | /* Transpose two utf-8 unicode glyphs. */ |
---|
734 | middle = e->buff + e->index; |
---|
735 | |
---|
736 | end = oe_next_point(e, middle); |
---|
737 | if (end == NULL) |
---|
738 | return; |
---|
739 | |
---|
740 | start = oe_prev_point(e, middle); |
---|
741 | if (start == NULL) |
---|
742 | return; |
---|
743 | |
---|
744 | tmp = g_new(char, (end - start) + 1); |
---|
745 | tmp[(end - start)] = 0; |
---|
746 | memcpy(tmp, middle, end - middle); |
---|
747 | memcpy(tmp + (end - middle), start, middle - start); |
---|
748 | |
---|
749 | owl_editwin_point_move(e, -1); |
---|
750 | owl_editwin_replace(e, 2, tmp); |
---|
751 | } |
---|
752 | |
---|
753 | /* insert 'string' at the current point, later text is shifted |
---|
754 | * right |
---|
755 | */ |
---|
756 | void owl_editwin_insert_string(owl_editwin *e, const char *s) |
---|
757 | { |
---|
758 | owl_editwin_replace(e, 0, s); |
---|
759 | } |
---|
760 | |
---|
761 | /* We assume index is not set to point to a mid-char */ |
---|
762 | static gunichar owl_editwin_get_char_at_point(owl_editwin *e) |
---|
763 | { |
---|
764 | return g_utf8_get_char(e->buff + e->index); |
---|
765 | } |
---|
766 | |
---|
767 | void owl_editwin_exchange_point_and_mark(owl_editwin *e) { |
---|
768 | int tmp; |
---|
769 | |
---|
770 | if (e->mark != -1) { |
---|
771 | tmp = e->mark; |
---|
772 | owl_editwin_set_mark(e); |
---|
773 | oe_set_index(e, tmp); |
---|
774 | } |
---|
775 | } |
---|
776 | |
---|
777 | int owl_editwin_point_move(owl_editwin *e, int delta) |
---|
778 | { |
---|
779 | const char *p; |
---|
780 | int change, d = 0; |
---|
781 | |
---|
782 | change = MAX(delta, - delta); |
---|
783 | p = e->buff + e->index; |
---|
784 | |
---|
785 | while (d < change && p != NULL) { |
---|
786 | if (delta > 0) |
---|
787 | p = oe_next_point(e, p); |
---|
788 | else |
---|
789 | p = oe_prev_point(e, p); |
---|
790 | if (p != NULL) { |
---|
791 | oe_set_index(e, p - e->buff); |
---|
792 | d++; |
---|
793 | } |
---|
794 | } |
---|
795 | |
---|
796 | return delta > 0 ? d : -d; |
---|
797 | } |
---|
798 | |
---|
799 | int owl_editwin_at_beginning_of_buffer(owl_editwin *e) { |
---|
800 | if (e->index == e->lock) |
---|
801 | return 1; |
---|
802 | |
---|
803 | return 0; |
---|
804 | } |
---|
805 | |
---|
806 | int owl_at_end_of_buffer(owl_editwin *e) { |
---|
807 | if (e->index == e->bufflen) |
---|
808 | return 1; |
---|
809 | |
---|
810 | return 0; |
---|
811 | } |
---|
812 | |
---|
813 | static int owl_editwin_at_beginning_of_line(owl_editwin *e) |
---|
814 | { |
---|
815 | oe_excursion x; |
---|
816 | int ret; |
---|
817 | |
---|
818 | if (owl_editwin_at_beginning_of_buffer(e)) |
---|
819 | return 1; |
---|
820 | |
---|
821 | oe_save_excursion(e, &x); |
---|
822 | owl_editwin_point_move(e, -1); |
---|
823 | ret = (owl_editwin_get_char_at_point(e) == '\n'); |
---|
824 | oe_restore_excursion(e, &x); |
---|
825 | |
---|
826 | return ret; |
---|
827 | } |
---|
828 | |
---|
829 | static int owl_editwin_is_char_in(owl_editwin *e, const char *set) |
---|
830 | { |
---|
831 | const char *p; |
---|
832 | |
---|
833 | for (p = set; *p != 0; p = g_utf8_find_next_char(p, NULL)) |
---|
834 | if (owl_editwin_get_char_at_point(e) == g_utf8_get_char(p)) |
---|
835 | return 1; |
---|
836 | return 0; |
---|
837 | } |
---|
838 | |
---|
839 | int owl_editwin_move_if_in(owl_editwin *e, int delta, const char *set) |
---|
840 | { |
---|
841 | int change, distance = 0; |
---|
842 | while (owl_editwin_is_char_in(e, set)) { |
---|
843 | change = owl_editwin_point_move(e, delta); |
---|
844 | distance += change; |
---|
845 | if (change == 0) |
---|
846 | break; |
---|
847 | } |
---|
848 | return distance; |
---|
849 | } |
---|
850 | |
---|
851 | int owl_editwin_move_if_not_in(owl_editwin *e, int delta, const char *set) |
---|
852 | { |
---|
853 | int change, distance = 0; |
---|
854 | while (!owl_editwin_is_char_in(e, set)) { |
---|
855 | change = owl_editwin_point_move(e, delta); |
---|
856 | distance += change; |
---|
857 | if (change == 0) |
---|
858 | break; |
---|
859 | } |
---|
860 | return distance; |
---|
861 | } |
---|
862 | |
---|
863 | int owl_editwin_move_to_beginning_of_line(owl_editwin *e) |
---|
864 | { |
---|
865 | int distance = 0; |
---|
866 | |
---|
867 | if (!owl_editwin_at_beginning_of_line(e)) { |
---|
868 | /* move off the \n if were at the end of a line */ |
---|
869 | distance += owl_editwin_point_move(e, -1); |
---|
870 | distance += owl_editwin_move_if_not_in(e, -1, "\n"); |
---|
871 | /* If we stopped because we reached a '\n', rather than because we |
---|
872 | * hit the top of the buffer, move forward from the end of the |
---|
873 | * previous line to the start of the current. */ |
---|
874 | if (owl_editwin_get_char_at_point(e) == '\n') |
---|
875 | distance += owl_editwin_point_move(e, 1); |
---|
876 | } |
---|
877 | e->goal_column = 0; /* subtleties */ |
---|
878 | |
---|
879 | return distance; |
---|
880 | } |
---|
881 | |
---|
882 | int owl_editwin_move_to_end_of_line(owl_editwin *e) |
---|
883 | { |
---|
884 | return owl_editwin_move_if_not_in(e, 1, "\n"); |
---|
885 | } |
---|
886 | |
---|
887 | int owl_editwin_line_move(owl_editwin *e, int delta) |
---|
888 | { |
---|
889 | int goal_column, change, ll, distance; |
---|
890 | int count = 0; |
---|
891 | |
---|
892 | change = MAX(delta, -delta); |
---|
893 | |
---|
894 | goal_column = e->goal_column; |
---|
895 | distance = owl_editwin_move_to_beginning_of_line(e); |
---|
896 | goal_column = goal_column == -1 ? -distance : goal_column; |
---|
897 | |
---|
898 | while(count < change) { |
---|
899 | if (delta > 0) { |
---|
900 | distance += owl_editwin_move_if_not_in(e, 1, "\n"); |
---|
901 | distance += owl_editwin_point_move(e, 1); |
---|
902 | } else { |
---|
903 | /* I really want to assert delta < 0 here */ |
---|
904 | distance += owl_editwin_point_move(e, -1); /* to the newline on |
---|
905 | the previous line */ |
---|
906 | distance += owl_editwin_move_to_beginning_of_line(e); |
---|
907 | } |
---|
908 | count++; |
---|
909 | } |
---|
910 | |
---|
911 | distance += (ll = owl_editwin_move_to_end_of_line(e)); |
---|
912 | if (ll > goal_column) |
---|
913 | distance += owl_editwin_point_move(e, goal_column - ll); |
---|
914 | |
---|
915 | e->goal_column = goal_column; |
---|
916 | oe_dirty(e); |
---|
917 | |
---|
918 | return distance; |
---|
919 | } |
---|
920 | |
---|
921 | void owl_editwin_backspace(owl_editwin *e) |
---|
922 | { |
---|
923 | /* delete the char before the current one |
---|
924 | * and shift later chars left |
---|
925 | */ |
---|
926 | if(owl_editwin_point_move(e, -1)) |
---|
927 | owl_editwin_delete_char(e); |
---|
928 | } |
---|
929 | |
---|
930 | void owl_editwin_key_up(owl_editwin *e) |
---|
931 | { |
---|
932 | owl_editwin_line_move(e, -1); |
---|
933 | } |
---|
934 | |
---|
935 | void owl_editwin_key_down(owl_editwin *e) |
---|
936 | { |
---|
937 | owl_editwin_line_move(e, 1); |
---|
938 | } |
---|
939 | |
---|
940 | void owl_editwin_key_left(owl_editwin *e) |
---|
941 | { |
---|
942 | owl_editwin_point_move(e, -1); |
---|
943 | } |
---|
944 | |
---|
945 | void owl_editwin_key_right(owl_editwin *e) |
---|
946 | { |
---|
947 | owl_editwin_point_move(e, 1); |
---|
948 | } |
---|
949 | |
---|
950 | int owl_editwin_forward_word(owl_editwin *e) |
---|
951 | { |
---|
952 | int distance; |
---|
953 | /* if we're starting on a space, find the first non-space */ |
---|
954 | distance = owl_editwin_move_if_in(e, 1, WHITESPACE); |
---|
955 | |
---|
956 | /* now find the end of this word */ |
---|
957 | distance += owl_editwin_move_if_not_in(e, 1, WHITESPACE); |
---|
958 | |
---|
959 | return distance; |
---|
960 | } |
---|
961 | |
---|
962 | void owl_editwin_move_to_nextword(owl_editwin *e) |
---|
963 | { |
---|
964 | owl_editwin_forward_word(e); |
---|
965 | } |
---|
966 | |
---|
967 | /* go backwards to the last non-space character |
---|
968 | */ |
---|
969 | int owl_editwin_backward_word(owl_editwin *e) |
---|
970 | { |
---|
971 | oe_excursion x; |
---|
972 | int distance = 0; |
---|
973 | int further = 0; |
---|
974 | int beginning; |
---|
975 | /* if in middle of word, beginning of word */ |
---|
976 | |
---|
977 | /* if at beginning of a word, find beginning of previous word */ |
---|
978 | |
---|
979 | if (owl_editwin_is_char_in(e, WHITESPACE)) { |
---|
980 | /* if in whitespace past end of word, find a word , the find the beginning*/ |
---|
981 | distance += owl_editwin_move_if_in(e, -1, WHITESPACE); /* leaves us on the last |
---|
982 | character of the word */ |
---|
983 | oe_save_excursion(e, &x); |
---|
984 | /* are we at the beginning of a word? */ |
---|
985 | owl_editwin_point_move(e, -1); |
---|
986 | beginning = owl_editwin_is_char_in(e, WHITESPACE); |
---|
987 | oe_restore_excursion(e, &x); |
---|
988 | if (beginning) |
---|
989 | return distance; |
---|
990 | } else { |
---|
991 | /* in the middle of the word; */ |
---|
992 | oe_save_excursion(e, &x); |
---|
993 | further += owl_editwin_point_move(e, -1); |
---|
994 | if (owl_editwin_is_char_in(e, WHITESPACE)) { /* we were at the beginning */ |
---|
995 | distance += owl_editwin_backward_word(e); /* previous case */ |
---|
996 | oe_release_excursion(e, &x); |
---|
997 | return distance + further; |
---|
998 | } else { |
---|
999 | oe_restore_excursion(e, &x); |
---|
1000 | } |
---|
1001 | } |
---|
1002 | distance += owl_editwin_move_if_not_in(e, -1, WHITESPACE); |
---|
1003 | /* will go past */ |
---|
1004 | if (e->index > e->lock) |
---|
1005 | distance += owl_editwin_point_move(e, 1); |
---|
1006 | return distance; |
---|
1007 | } |
---|
1008 | |
---|
1009 | void owl_editwin_move_to_previousword(owl_editwin *e) |
---|
1010 | { |
---|
1011 | owl_editwin_backward_word(e); |
---|
1012 | } |
---|
1013 | |
---|
1014 | void owl_editwin_delete_nextword(owl_editwin *e) |
---|
1015 | { |
---|
1016 | oe_excursion x; |
---|
1017 | |
---|
1018 | oe_save_excursion(e, &x); |
---|
1019 | oe_set_mark(e, e->index); |
---|
1020 | owl_editwin_forward_word(e); |
---|
1021 | owl_editwin_kill_region(e); |
---|
1022 | oe_restore_mark_only(e, &x); |
---|
1023 | } |
---|
1024 | |
---|
1025 | void owl_editwin_delete_previousword(owl_editwin *e) |
---|
1026 | { |
---|
1027 | oe_excursion x; |
---|
1028 | |
---|
1029 | oe_save_excursion(e, &x); |
---|
1030 | oe_set_mark(e, e->index); |
---|
1031 | owl_editwin_backward_word(e); |
---|
1032 | owl_editwin_kill_region(e); |
---|
1033 | oe_restore_mark_only(e, &x); |
---|
1034 | } |
---|
1035 | |
---|
1036 | void owl_editwin_move_to_line_end(owl_editwin *e) |
---|
1037 | { |
---|
1038 | owl_editwin_move_to_end_of_line(e); |
---|
1039 | } |
---|
1040 | |
---|
1041 | void owl_editwin_delete_to_endofline(owl_editwin *e) |
---|
1042 | { |
---|
1043 | oe_excursion x; |
---|
1044 | int distance; |
---|
1045 | |
---|
1046 | oe_save_excursion(e, &x); |
---|
1047 | owl_editwin_set_mark(e); |
---|
1048 | distance = owl_editwin_move_to_end_of_line(e); |
---|
1049 | if (distance) |
---|
1050 | owl_editwin_kill_region(e); |
---|
1051 | else |
---|
1052 | owl_editwin_replace(e, 1, ""); |
---|
1053 | oe_restore_excursion(e, &x); |
---|
1054 | } |
---|
1055 | |
---|
1056 | void owl_editwin_yank(owl_editwin *e) |
---|
1057 | { |
---|
1058 | const char *killbuf = owl_global_get_kill_buffer(&g); |
---|
1059 | |
---|
1060 | if (killbuf != NULL) |
---|
1061 | owl_editwin_replace(e, 0, killbuf); |
---|
1062 | } |
---|
1063 | |
---|
1064 | static const char *oe_copy_buf(owl_editwin *e, const char *buf, int len) |
---|
1065 | { |
---|
1066 | owl_global_set_kill_buffer(&g, buf, len); |
---|
1067 | return owl_global_get_kill_buffer(&g); |
---|
1068 | } |
---|
1069 | |
---|
1070 | static int oe_copy_region(owl_editwin *e) |
---|
1071 | { |
---|
1072 | const char *p; |
---|
1073 | int start, end; |
---|
1074 | |
---|
1075 | if (e->mark == -1) |
---|
1076 | return 0; |
---|
1077 | |
---|
1078 | start = MIN(e->index, e->mark); |
---|
1079 | end = MAX(e->index, e->mark); |
---|
1080 | |
---|
1081 | p = oe_copy_buf(e, e->buff + start, end - start); |
---|
1082 | if (p != NULL) |
---|
1083 | return end - start; |
---|
1084 | return 0; |
---|
1085 | } |
---|
1086 | |
---|
1087 | void owl_editwin_copy_region_as_kill(owl_editwin *e) |
---|
1088 | { |
---|
1089 | oe_copy_region(e); |
---|
1090 | } |
---|
1091 | |
---|
1092 | void owl_editwin_kill_region(owl_editwin *e) |
---|
1093 | { |
---|
1094 | if (e->index > e->mark) |
---|
1095 | owl_editwin_exchange_point_and_mark(e); |
---|
1096 | |
---|
1097 | owl_editwin_replace_internal(e, oe_copy_region(e), ""); |
---|
1098 | } |
---|
1099 | |
---|
1100 | void owl_editwin_move_to_line_start(owl_editwin *e) |
---|
1101 | { |
---|
1102 | owl_editwin_move_to_beginning_of_line(e); |
---|
1103 | } |
---|
1104 | |
---|
1105 | void owl_editwin_move_to_end(owl_editwin *e) |
---|
1106 | { |
---|
1107 | oe_set_index(e, e->bufflen); |
---|
1108 | } |
---|
1109 | |
---|
1110 | void owl_editwin_move_to_top(owl_editwin *e) |
---|
1111 | { |
---|
1112 | oe_set_index(e, e->lock); |
---|
1113 | } |
---|
1114 | |
---|
1115 | void owl_editwin_backward_paragraph(owl_editwin *e) |
---|
1116 | { |
---|
1117 | owl_editwin_point_move(e, -1); |
---|
1118 | for (; e->index >= e->lock; owl_editwin_point_move(e, -1)) { |
---|
1119 | if (e->index <= e->lock || |
---|
1120 | ((e->buff[e->index] == '\n') && (e->buff[e->index - 1]=='\n'))) |
---|
1121 | break; |
---|
1122 | } |
---|
1123 | } |
---|
1124 | |
---|
1125 | void owl_editwin_forward_paragraph(owl_editwin *e) |
---|
1126 | { |
---|
1127 | owl_editwin_point_move(e, 1); |
---|
1128 | /* scan forward to the start of the next paragraph */ |
---|
1129 | for(; e->index < e->bufflen; owl_editwin_point_move(e, 1)) { |
---|
1130 | if (e->buff[e->index -1] == '\n' && e->buff[e->index] == '\n') |
---|
1131 | break; |
---|
1132 | } |
---|
1133 | } |
---|
1134 | |
---|
1135 | int owl_editwin_current_column(owl_editwin *e) |
---|
1136 | { |
---|
1137 | if (e->column == -1) { |
---|
1138 | oe_excursion x; |
---|
1139 | int lineindex; |
---|
1140 | |
---|
1141 | oe_save_excursion(e, &x); |
---|
1142 | owl_editwin_move_to_beginning_of_line(e); |
---|
1143 | lineindex = e->index; |
---|
1144 | oe_restore_excursion(e, &x); |
---|
1145 | e->column = oe_region_width(e, lineindex, e->index, 0); |
---|
1146 | } |
---|
1147 | return e->column; |
---|
1148 | } |
---|
1149 | |
---|
1150 | void owl_editwin_fill_paragraph(owl_editwin *e) |
---|
1151 | { |
---|
1152 | oe_excursion x; |
---|
1153 | gunichar ch; |
---|
1154 | int sentence; |
---|
1155 | |
---|
1156 | if (e->fillcol < 0) |
---|
1157 | /* auto-fill disabled */ |
---|
1158 | return; |
---|
1159 | |
---|
1160 | oe_save_excursion(e, &x); |
---|
1161 | |
---|
1162 | /* Mark the end of the paragraph */ |
---|
1163 | owl_editwin_forward_paragraph(e); |
---|
1164 | /* Skip the trailing newline */ |
---|
1165 | owl_editwin_point_move(e, -1); |
---|
1166 | owl_editwin_set_mark(e); |
---|
1167 | |
---|
1168 | owl_editwin_backward_paragraph(e); |
---|
1169 | |
---|
1170 | /* Don't mess with the leading newline */ |
---|
1171 | if (owl_editwin_get_char_at_point(e) == '\n') |
---|
1172 | owl_editwin_point_move(e, 1); |
---|
1173 | |
---|
1174 | /* |
---|
1175 | * First pass: Scan forward replacing all series of spaces with ' ' |
---|
1176 | * (or nothing after CJK ideograms) |
---|
1177 | */ |
---|
1178 | sentence = 0; |
---|
1179 | for(;e->index < e->mark; owl_editwin_point_move(e, 1)) { |
---|
1180 | /* bail if we hit a trailing dot on the buffer */ |
---|
1181 | if (strcmp(e->buff + e->index, "\n.") == 0) { |
---|
1182 | owl_editwin_set_mark(e); |
---|
1183 | break; |
---|
1184 | } |
---|
1185 | |
---|
1186 | ch = owl_editwin_get_char_at_point(e); |
---|
1187 | |
---|
1188 | if (owl_util_can_break_after(ch) || ch == '\n') { |
---|
1189 | if (g_unichar_isspace(ch)) { |
---|
1190 | owl_editwin_replace(e, 1, " "); |
---|
1191 | } |
---|
1192 | |
---|
1193 | if (sentence && g_unichar_isspace(owl_editwin_get_char_at_point(e)) |
---|
1194 | && e->index < e->mark) |
---|
1195 | owl_editwin_point_move(e, 1); |
---|
1196 | |
---|
1197 | while(g_unichar_isspace(owl_editwin_get_char_at_point(e)) |
---|
1198 | && e->index < e->mark) { |
---|
1199 | owl_editwin_delete_char(e); |
---|
1200 | } |
---|
1201 | } |
---|
1202 | |
---|
1203 | if(ch == '.' || ch == '!' || ch == '?') |
---|
1204 | sentence = 1; |
---|
1205 | else |
---|
1206 | sentence = 0; |
---|
1207 | } |
---|
1208 | |
---|
1209 | owl_editwin_backward_paragraph(e); |
---|
1210 | |
---|
1211 | /* Now go through inserting newlines as needed */ |
---|
1212 | while(e->index < e->mark) { |
---|
1213 | /* if we've travelled too far, linewrap */ |
---|
1214 | if (owl_editwin_current_column(e) >= e->fillcol) |
---|
1215 | _owl_editwin_linewrap_word(e); |
---|
1216 | owl_editwin_point_move(e, 1); |
---|
1217 | } |
---|
1218 | |
---|
1219 | oe_restore_excursion(e, &x); |
---|
1220 | } |
---|
1221 | |
---|
1222 | /* returns true if only whitespace remains */ |
---|
1223 | int owl_editwin_is_at_end(owl_editwin *e) |
---|
1224 | { |
---|
1225 | return (only_whitespace(e->buff + e->index)); |
---|
1226 | } |
---|
1227 | |
---|
1228 | static int owl_editwin_check_dotsend(owl_editwin *e) |
---|
1229 | { |
---|
1230 | int zdot = 0; |
---|
1231 | oe_excursion x; |
---|
1232 | |
---|
1233 | if (!e->dotsend) return(0); |
---|
1234 | if (!owl_editwin_is_at_end(e)) return (0); |
---|
1235 | |
---|
1236 | oe_save_excursion(e, &x); |
---|
1237 | |
---|
1238 | owl_editwin_point_move(e, -3); |
---|
1239 | |
---|
1240 | if(strncmp(e->buff + e->index, "\n.\n", 3) == 0) { |
---|
1241 | owl_editwin_point_move(e, 1); |
---|
1242 | zdot = 1; |
---|
1243 | } else if(e->index == e->lock && |
---|
1244 | strncmp(e->buff + e->index, ".\n", 2) == 0) { |
---|
1245 | zdot = 1; |
---|
1246 | } |
---|
1247 | |
---|
1248 | if(zdot) { |
---|
1249 | owl_editwin_set_mark(e); |
---|
1250 | owl_editwin_move_to_end(e); |
---|
1251 | owl_editwin_replace_region(e, ""); |
---|
1252 | } |
---|
1253 | |
---|
1254 | oe_restore_excursion(e, &x); |
---|
1255 | |
---|
1256 | return zdot; |
---|
1257 | } |
---|
1258 | |
---|
1259 | void owl_editwin_post_process_char(owl_editwin *e, owl_input j) |
---|
1260 | { |
---|
1261 | /* XXX force a redisplay? */ |
---|
1262 | if ((j.ch==13 || j.ch==10) && owl_editwin_check_dotsend(e)) { |
---|
1263 | owl_command_edit_done(e); |
---|
1264 | return; |
---|
1265 | } |
---|
1266 | } |
---|
1267 | |
---|
1268 | static int oe_region_column(owl_editwin *e, int start, int end, int offset) |
---|
1269 | { |
---|
1270 | const char *p; |
---|
1271 | int column = offset; |
---|
1272 | |
---|
1273 | for(p = e->buff + start; |
---|
1274 | p < e->buff + end; |
---|
1275 | p = g_utf8_find_next_char(p, NULL)) { |
---|
1276 | gunichar c = g_utf8_get_char(p); |
---|
1277 | if (c == '\n') |
---|
1278 | column = 0; |
---|
1279 | else |
---|
1280 | column += oe_char_width(c, column); |
---|
1281 | } |
---|
1282 | return column; |
---|
1283 | } |
---|
1284 | |
---|
1285 | static int oe_region_width(owl_editwin *e, int start, int end, int offset) |
---|
1286 | { |
---|
1287 | const char *p; |
---|
1288 | int width = offset; |
---|
1289 | |
---|
1290 | for(p = e->buff + start; |
---|
1291 | p < e->buff + end; |
---|
1292 | p = g_utf8_find_next_char(p, NULL)) |
---|
1293 | width += oe_char_width(g_utf8_get_char(p), width); |
---|
1294 | |
---|
1295 | return width - offset; |
---|
1296 | } |
---|
1297 | |
---|
1298 | static void oe_insert_char(owl_editwin *e, gunichar c) |
---|
1299 | { |
---|
1300 | oe_excursion x; |
---|
1301 | char tmp[7]; |
---|
1302 | int replaced = -1; |
---|
1303 | int column; |
---|
1304 | |
---|
1305 | if (c == '\r') /* translate CRs to NLs */ |
---|
1306 | c = '\n'; |
---|
1307 | |
---|
1308 | if (!g_unichar_iscntrl(c) || c == '\n' || c== '\t' ) { |
---|
1309 | if (c == '\n' && e->style == OWL_EDITWIN_STYLE_ONELINE) { |
---|
1310 | return; |
---|
1311 | } |
---|
1312 | |
---|
1313 | column = owl_editwin_current_column(e); |
---|
1314 | if (e->wrapcol > 0 && column != -1 && |
---|
1315 | column + oe_char_width(c, column) > e->wrapcol) { |
---|
1316 | /* XXX this is actually wrong: |
---|
1317 | * + If the user went back and inserted a bunch of stuff in the middle of |
---|
1318 | * the line, there may be more than one word past the wrap column. |
---|
1319 | */ |
---|
1320 | oe_save_excursion(e, &x); |
---|
1321 | |
---|
1322 | if (c == ' ' || c == '\t') { |
---|
1323 | owl_editwin_point_move(e, -1); |
---|
1324 | replaced = -owl_editwin_move_if_in(e, -1, " \t"); |
---|
1325 | if (!replaced) { |
---|
1326 | c = '\n'; |
---|
1327 | replaced = -1; |
---|
1328 | } |
---|
1329 | } else { |
---|
1330 | while(!owl_editwin_at_beginning_of_line(e)) { |
---|
1331 | owl_editwin_point_move(e, -1); |
---|
1332 | if (owl_util_can_break_after(owl_editwin_get_char_at_point(e))) { |
---|
1333 | replaced = -owl_editwin_move_if_in(e, -1, " \t"); |
---|
1334 | break; |
---|
1335 | } |
---|
1336 | } |
---|
1337 | if (owl_editwin_at_beginning_of_line(e)) |
---|
1338 | replaced = -1; |
---|
1339 | } |
---|
1340 | if (replaced && !owl_editwin_at_beginning_of_line(e)) |
---|
1341 | owl_editwin_point_move(e, 1); |
---|
1342 | if (replaced >= 0) { |
---|
1343 | owl_editwin_replace(e, replaced, "\n"); |
---|
1344 | } |
---|
1345 | oe_restore_excursion(e, &x); |
---|
1346 | } |
---|
1347 | |
---|
1348 | if (replaced >= 0 && (c == ' ' || c == '\t')) |
---|
1349 | return; /* our work here is done */ |
---|
1350 | |
---|
1351 | tmp[g_unichar_to_utf8(c, tmp)] = '\0'; |
---|
1352 | owl_editwin_replace(e, 0, tmp); |
---|
1353 | } |
---|
1354 | } |
---|
1355 | |
---|
1356 | void owl_editwin_process_char(owl_editwin *e, owl_input j) |
---|
1357 | { |
---|
1358 | if (j.ch == ERR) |
---|
1359 | return; |
---|
1360 | /* Ignore ncurses control characters. */ |
---|
1361 | if (j.ch < 0x100) { |
---|
1362 | oe_insert_char(e, j.uch); |
---|
1363 | } |
---|
1364 | } |
---|
1365 | |
---|
1366 | const char *owl_editwin_get_text(owl_editwin *e) |
---|
1367 | { |
---|
1368 | return(e->buff+e->lock); |
---|
1369 | } |
---|
1370 | |
---|
1371 | CALLER_OWN char *owl_editwin_get_region(owl_editwin *e) |
---|
1372 | { |
---|
1373 | int start, end; |
---|
1374 | start = e->index; |
---|
1375 | end = e->mark; |
---|
1376 | if(start > end) { |
---|
1377 | int tmp = end; |
---|
1378 | end = start; |
---|
1379 | start = tmp; |
---|
1380 | } |
---|
1381 | |
---|
1382 | return oe_chunk(e, start, end); |
---|
1383 | } |
---|
1384 | |
---|
1385 | int owl_editwin_get_echochar(owl_editwin *e) |
---|
1386 | { |
---|
1387 | return e->echochar; |
---|
1388 | } |
---|
1389 | |
---|
1390 | static CALLER_OWN char *oe_chunk(owl_editwin *e, int start, int end) |
---|
1391 | { |
---|
1392 | char *p; |
---|
1393 | |
---|
1394 | p = g_new(char, end - start + 1); |
---|
1395 | memcpy(p, e->buff + start, end - start); |
---|
1396 | p[end - start] = 0; |
---|
1397 | |
---|
1398 | return p; |
---|
1399 | } |
---|
1400 | |
---|
1401 | /* |
---|
1402 | * The only guarantee made about these values is that comparisons |
---|
1403 | * between them, as well as comparison between multiple calls to these |
---|
1404 | * functions without modifying the editwin in-between, are meaningful. |
---|
1405 | */ |
---|
1406 | |
---|
1407 | int owl_editwin_get_point(owl_editwin *e) |
---|
1408 | { |
---|
1409 | return e->index; |
---|
1410 | } |
---|
1411 | |
---|
1412 | int owl_editwin_get_mark(owl_editwin *e) |
---|
1413 | { |
---|
1414 | return e->mark; |
---|
1415 | } |
---|
1416 | |
---|
1417 | static void oe_dirty(owl_editwin *e) |
---|
1418 | { |
---|
1419 | if (e->win) owl_window_dirty(e->win); |
---|
1420 | } |
---|
1421 | |
---|
1422 | |
---|
1423 | /* |
---|
1424 | * Local Variables: |
---|
1425 | * mode:C |
---|
1426 | * c-basic-offset:2 |
---|
1427 | * End: |
---|
1428 | */ |
---|