aboutsummaryrefslogtreecommitdiffstats
path: root/src/lib/elementary/elm_code_widget_selection.c
blob: e6076ac361707fd07d5d9716b39b150cf94fa010 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
#ifdef HAVE_CONFIG_H
# include "elementary_config.h"
#endif

#include "Elementary.h"

#include "elm_code_widget_private.h"

static char _breaking_chars[] = " \t,.?!;:*&()[]{}";

static Elm_Code_Widget_Selection_Data *
_elm_code_widget_selection_new()
{
   Elm_Code_Widget_Selection_Data *data;

   data = calloc(1, sizeof(Elm_Code_Widget_Selection_Data));

   return data;
}

static void
_elm_code_widget_selection_limit(Evas_Object *widget EINA_UNUSED, Elm_Code_Widget_Data *pd,
                                 unsigned int *row, unsigned int *col)
{
   Elm_Code_Line *line;
   Elm_Code_File *file;
   unsigned int width;

   file = pd->code->file;

   if (*row > elm_code_file_lines_get(file))
     *row = elm_code_file_lines_get(file);

   line = elm_code_file_line_get(file, *row);
   width = elm_code_widget_line_text_column_width_get(widget, line);

   if (*col > width + 1)
     *col = width + 1;
   if (*col < 1)
     *col = 1;
}

EAPI void
elm_code_widget_selection_start(Evas_Object *widget,
                                unsigned int line, unsigned int col)
{
   Elm_Code_Widget_Data *pd;
   Elm_Code_Widget_Selection_Data *selection;

   pd = efl_data_scope_get(widget, ELM_CODE_WIDGET_CLASS);

   _elm_code_widget_selection_limit(widget, pd, &line, &col);
   if (!pd->selection)
     {
        selection = _elm_code_widget_selection_new();

        selection->end_line = line;
        selection->end_col = col;

        pd->selection = selection;
     }

   pd->selection->start_line = line;
   pd->selection->start_col = col;
   efl_event_callback_call(widget, ELM_OBJ_CODE_WIDGET_EVENT_SELECTION_CHANGED, widget);
   elm_obj_code_widget_cursor_position_set(widget, col, line);
}

EAPI void
elm_code_widget_selection_end(Evas_Object *widget,
                              unsigned int line, unsigned int col)
{
   Elm_Code_Widget_Data *pd;
   Elm_Code_Widget_Selection_Data *selection;

   pd = efl_data_scope_get(widget, ELM_CODE_WIDGET_CLASS);

   _elm_code_widget_selection_limit(widget, pd, &line, &col);
   if (!pd->selection)
     {
        selection = _elm_code_widget_selection_new();

        selection->start_line = line;
        selection->start_col = col;

        pd->selection = selection;
     }

   pd->selection->end_line = line;
   pd->selection->end_col = col;
   efl_event_callback_call(widget, ELM_OBJ_CODE_WIDGET_EVENT_SELECTION_CHANGED, widget);
}

EAPI Elm_Code_Widget_Selection_Data *
elm_code_widget_selection_normalized_get(Evas_Object *widget)
{
   Elm_Code_Widget_Data *pd;
   Elm_Code_Widget_Selection_Data *selection;
   Eina_Bool reverse;

   pd = efl_data_scope_get(widget, ELM_CODE_WIDGET_CLASS);
   selection = _elm_code_widget_selection_new();

   if (!pd->selection)
     {
        selection->start_line = selection->end_line = 1;
        selection->start_col = selection->end_col = 1;

        return selection;
     }

   if (pd->selection->start_line == pd->selection->end_line)
     reverse = pd->selection->start_col > pd->selection->end_col;
   else
     reverse = pd->selection->start_line > pd->selection->end_line;

   if (reverse)
     {
        selection->start_line = pd->selection->end_line;
        selection->start_col = pd->selection->end_col;
        selection->end_line = pd->selection->start_line;
        selection->end_col = pd->selection->start_col;
     }
   else
     {
        selection->start_line = pd->selection->start_line;
        selection->start_col = pd->selection->start_col;
        selection->end_line = pd->selection->end_line;
        selection->end_col = pd->selection->end_col;
     }

   return selection;
}

EAPI void
elm_code_widget_selection_clear(Evas_Object *widget)
{
   Elm_Code_Widget_Data *pd;

   pd = efl_data_scope_get(widget, ELM_CODE_WIDGET_CLASS);

   if (!pd->selection)
     return;

   free(pd->selection);
   pd->selection = NULL;
   efl_event_callback_call(widget, ELM_OBJ_CODE_WIDGET_EVENT_SELECTION_CLEARED, widget);
}

static void
_elm_code_widget_selection_delete_single(Elm_Code_Widget *widget, Elm_Code_Widget_Data *pd)
{
   Elm_Code_Line *line;
   const char *old;
   unsigned int old_length, start, end, length;
   char *content;
   Elm_Code_Widget_Selection_Data *selection;

   selection = elm_code_widget_selection_normalized_get(widget);
   line = elm_code_file_line_get(pd->code->file, selection->start_line);
   old = elm_code_line_text_get(line, &old_length);
   start = elm_code_widget_line_text_position_for_column_get(widget, line, selection->start_col);
   end = elm_code_widget_line_text_position_for_column_get(widget, line, selection->end_col);
   length = line->length - (end - start + 1);

   if (end == line->length)
     {
        length = line->length - (end - start);

        content = malloc(sizeof(char) * length);
        strncpy(content, old, start);
     }
   else
     {
        length = line->length - (end - start + 1);

        content = malloc(sizeof(char) * length);
        strncpy(content, old, start);
        strncpy(content + start, old + end + 1,
                old_length - (end + 1));
      }
   elm_code_line_text_set(line, content, length);
   free(content);
   free(selection);
}

static void
_elm_code_widget_selection_delete_multi(Elm_Code_Widget *widget, Elm_Code_Widget_Data *pd)
{
   Elm_Code_Line *line;
   const char *first, *last;
   unsigned int last_length, start, end, length, i;
   char *content;
   Elm_Code_Widget_Selection_Data *selection;

   if (pd->selection->end_line == pd->selection->start_line)
     return;

   selection = elm_code_widget_selection_normalized_get(widget);
   line = elm_code_file_line_get(pd->code->file, selection->start_line);
   first = elm_code_line_text_get(line, NULL);
   start = elm_code_widget_line_text_position_for_column_get(widget, line, selection->start_col);

   line = elm_code_file_line_get(pd->code->file, selection->end_line);
   last = elm_code_line_text_get(line, &last_length);
   end = elm_code_widget_line_text_position_for_column_get(widget, line, selection->end_col);

   if (last_length == end)
     {
        length = start + last_length - end;
        content = malloc(sizeof(char) * length);
        strncpy(content, first, start);
     }
   else
     {
        length = start + last_length - (end + 1);
        content = malloc(sizeof(char) * length);
        strncpy(content, first, start);

        strncpy(content + start, last + end + 1, last_length - (end + 1));
     }

   for (i = line->number; i > selection->start_line; i--)
     elm_code_file_line_remove(pd->code->file, i);

   line = elm_code_file_line_get(pd->code->file, selection->start_line);
   elm_code_line_text_set(line, content, length);
   free(content);
   free(selection);
}

EAPI void
elm_code_widget_selection_delete(Evas_Object *widget)
{
   Elm_Code_Widget_Data *pd;

   pd = efl_data_scope_get(widget, ELM_CODE_WIDGET_CLASS);

   if (!pd->selection)
     return;

   if (pd->selection->start_line == pd->selection->end_line)
     _elm_code_widget_selection_delete_single(widget, pd);
   else
     _elm_code_widget_selection_delete_multi(widget, pd);

   free(pd->selection);
   pd->selection = NULL;
   efl_event_callback_call(widget, ELM_OBJ_CODE_WIDGET_EVENT_SELECTION_CLEARED, widget);
}

EAPI void
elm_code_widget_selection_select_line(Evas_Object *widget, unsigned int line)
{
   Elm_Code_Widget_Data *pd;
   Elm_Code_Line *lineobj;

   pd = efl_data_scope_get(widget, ELM_CODE_WIDGET_CLASS);
   lineobj = elm_code_file_line_get(pd->code->file, line);

   if (!lineobj)
     return;

   elm_code_widget_selection_start(widget, line, 1);
   elm_code_widget_selection_end(widget, line, lineobj->length);
}

static Eina_Bool
_elm_code_widget_selection_char_breaks(char chr)
{
   unsigned int i;

   if (chr == 0)
     return EINA_TRUE;

   for (i = 0; i < sizeof(_breaking_chars); i++)
     if (chr == _breaking_chars[i])
       return EINA_TRUE;


   return EINA_FALSE;
}

EAPI void
elm_code_widget_selection_select_word(Evas_Object *widget, unsigned int line, unsigned int col)
{
   Elm_Code_Widget_Data *pd;
   Elm_Code_Line *lineobj;
   unsigned int colpos, length, pos;
   const char *content;

   pd = efl_data_scope_get(widget, ELM_CODE_WIDGET_CLASS);
   lineobj = elm_code_file_line_get(pd->code->file, line);
   content = elm_code_line_text_get(lineobj, &length);

   _elm_code_widget_selection_limit(widget, pd, &line, &col);
   colpos = elm_code_widget_line_text_position_for_column_get(widget, lineobj, col);

   pos = colpos;
   while (pos > 0)
     {
        if (_elm_code_widget_selection_char_breaks(content[pos - 1]))
          break;
        pos--;
     }
   elm_code_widget_selection_start(widget, line,
                                   elm_code_widget_line_text_column_width_to_position(widget, lineobj, pos));

   pos = colpos;
   while (pos < length - 1)
     {
        if (_elm_code_widget_selection_char_breaks(content[pos + 1]))
          break;
        pos++;
     }
   elm_code_widget_selection_end(widget, line,
                                 elm_code_widget_line_text_column_width_to_position(widget, lineobj, pos));
}

EAPI char *
elm_code_widget_selection_text_get(Evas_Object *widget)
{
   Elm_Code_Widget_Data *pd;
   Elm_Code_Widget_Selection_Data *selection;
   char *text;

   pd = efl_data_scope_get(widget, ELM_CODE_WIDGET_CLASS);

   if (!pd->selection)
     return strdup("");

   selection = elm_code_widget_selection_normalized_get(widget);

   text = elm_code_widget_text_between_positions_get(widget,
                                                     selection->start_col, selection->start_line,
                                                     selection->end_col, selection->end_line);

   free(selection);
   return text;
}

static void
_selection_loss_cb(void *data EINA_UNUSED, Elm_Sel_Type selection EINA_UNUSED)
{
   /* Elm_Code_Widget *widget; */

   /* widget = (Elm_Code_Widget *)data; */
// TODO we need to know whih selection we are clearing!
//   elm_code_widget_selection_clear(widget);
}

EAPI void
elm_code_widget_selection_cut(Evas_Object *widget)
{
   char *text;

   text = elm_code_widget_selection_text_get(widget);
   elm_cnp_selection_set(widget, ELM_SEL_TYPE_CLIPBOARD, ELM_SEL_FORMAT_TEXT, text, strlen(text));
   elm_cnp_selection_loss_callback_set(widget, ELM_SEL_TYPE_CLIPBOARD, _selection_loss_cb, widget);
   free(text);

   elm_code_widget_selection_delete(widget);
}

EAPI void
elm_code_widget_selection_copy(Evas_Object *widget)
{
   char *text;

   text = elm_code_widget_selection_text_get(widget);
   elm_cnp_selection_set(widget, ELM_SEL_TYPE_CLIPBOARD, ELM_SEL_FORMAT_TEXT, text, strlen(text));
   elm_cnp_selection_loss_callback_set(widget, ELM_SEL_TYPE_CLIPBOARD, _selection_loss_cb, widget);
   free(text);
}

static void
_selection_paste_single(Elm_Code_Widget *widget, Elm_Code *code,
                        unsigned int col, unsigned int row, const char *text, unsigned int len)
{
   Elm_Code_Line *line;
   unsigned int position, newcol;

   line = elm_code_file_line_get(code->file, row);
   position = elm_code_widget_line_text_position_for_column_get(widget, line, col);
   elm_code_line_text_insert(line, position, text, len);

   newcol = elm_code_widget_line_text_column_width_to_position(widget, line, position + len);
   elm_obj_code_widget_cursor_position_set(widget, newcol, row);
}

static void
_selection_paste_multi(Elm_Code_Widget *widget, Elm_Code *code,
                       unsigned int col, unsigned int row, const char *text, unsigned int len)
{
   Elm_Code_Line *line;
   unsigned int position, newrow, remain;
   int nlpos;
   short nllen;
   char *ptr;

   line = elm_code_file_line_get(code->file, row);
   position = elm_code_widget_line_text_position_for_column_get(widget, line, col);
   elm_code_line_split_at(line, position);

   newrow = row;
   ptr = (char *)text;
   remain = len;
   while ((nlpos = elm_code_text_newlinenpos(ptr, remain, &nllen)) != ELM_CODE_TEXT_NOT_FOUND)
     {
        if (newrow == row)
          _selection_paste_single(widget, code, col, row, text, nlpos);
        else
          elm_code_file_line_insert(code->file, newrow, ptr, nlpos, NULL);

        remain -= nlpos + nllen;
        ptr += nlpos + nllen;
        newrow++;
     }

   _selection_paste_single(widget, code, 1, newrow, ptr, len - (ptr - text));
}

static Eina_Bool
_selection_paste_cb(void *data, Evas_Object *obj EINA_UNUSED, Elm_Selection_Data *ev)
{
   Elm_Code *code;
   Elm_Code_Widget *widget;
   unsigned int row, col;

   widget = (Elm_Code_Widget *)data;

   if (ev->format != ELM_SEL_FORMAT_TEXT)
     return EINA_TRUE;
   if (ev->len <= 0)
     return EINA_TRUE;

   code = elm_obj_code_widget_code_get(widget);
   elm_obj_code_widget_cursor_position_get(widget, &col, &row);

   if (elm_code_text_newlinenpos(ev->data, ev->len, NULL) == ELM_CODE_TEXT_NOT_FOUND)
     _selection_paste_single(widget, code, col, row, ev->data, ev->len - 1);
   else
     _selection_paste_multi(widget, code, col, row, ev->data, ev->len - 1);

   return EINA_TRUE;
}

EAPI void
elm_code_widget_selection_paste(Evas_Object *widget)
{
   elm_code_widget_selection_delete(widget);

   elm_cnp_selection_get(widget, ELM_SEL_TYPE_CLIPBOARD, ELM_SEL_FORMAT_TEXT, _selection_paste_cb, widget);
}