summaryrefslogtreecommitdiff
path: root/app/wlib/gtklib/text.c
blob: 0812acea133f07ab7366009393e815c3f72933e0 (plain)
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
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
/** \file text.c
 * multi line text entry widget
 */

/*  XTrkCad - Model Railroad CAD
 *  Copyright (C) 2005 Dave Bullis
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

#define GTK_DISABLE_SINGLE_INCLUDES
#define GDK_DISABLE_DEPRECATED
#define GTK_DISABLE_DEPRECATED
#define GSEAL_ENABLE

#include <gtk/gtk.h>
#include <gdk/gdk.h>

#include "i18n.h"
#include "gtkint.h"

struct PrintData {
    wText_p	tb;
    gint lines_per_page;
    gdouble font_size;
    gchar **lines;
    gint total_lines;
    gint total_pages;
};

#define HEADER_HEIGHT 20.0
#define HEADER_GAP 8.5


/*
 *****************************************************************************
 *
 * Multi-line Text Boxes
 *
 *****************************************************************************
 */

struct wText_t {
    WOBJ_COMMON
    wPos_t width, height;
    int changed;
    GtkWidget *text;
};

/**
 * Reset a text entry by clearing text and resetting the readonly and the
 * change flag.
 *
 * \param bt IN text entry
 * \return
 */

void wTextClear(wText_p bt)
{
    GtkTextBuffer *tb;
    tb = gtk_text_view_get_buffer(GTK_TEXT_VIEW(bt->text));
    gtk_text_buffer_set_text(tb, "", -1);

    if (bt->option & BO_READONLY) {
        gtk_text_view_set_editable(GTK_TEXT_VIEW(bt->text), FALSE);
    }

    bt->changed = FALSE;
}

/**
 * Append text to the end of the entry field's text buffer.
 *
 * \param bt IN text buffer
 * \param text IN text to append
 * \return
 */

void wTextAppend(wText_p bt,
                 const char *text)
{
    GtkTextBuffer *tb;
    GtkTextIter ti1;
    GtkTextMark *tm;
    

    if (bt->text == 0) {
        abort();
    }

    tb = gtk_text_view_get_buffer(GTK_TEXT_VIEW(bt->text));
    // convert to utf-8
    text = wlibConvertInput(text);
    // append to end of buffer
    gtk_text_buffer_get_end_iter(tb, &ti1);
    gtk_text_buffer_insert(tb, &ti1, text, -1);
    
    if ( bt->option & BT_TOP ) {
        // and scroll to start of text
        gtk_text_buffer_get_start_iter(tb, &ti1);
    } else {
        // and scroll to end of text
        gtk_text_buffer_get_end_iter(tb, &ti1);
    }
    tm = gtk_text_buffer_create_mark(tb, NULL, &ti1, TRUE );
    gtk_text_view_scroll_mark_onscreen (GTK_TEXT_VIEW(bt->text), tm );
    gtk_text_buffer_delete_mark( tb, tm );
 
    bt->changed = FALSE;
}

/**
 * Get the text from a text buffer in system codepage
 * The caller is responsible for free'ing the allocated storage.
 *
 * Dont convert from UTF8
 *
 * \param bt IN the text widget
 * \return    pointer to the converted text
 */

static char *wlibGetText(wText_p bt)
{
    GtkTextBuffer *tb;
    GtkTextIter ti1, ti2;
    char *cp, *cp1, *res;

    if (bt->text == 0) {
        abort();
    }

    tb = gtk_text_view_get_buffer(GTK_TEXT_VIEW(bt->text));
    gtk_text_buffer_get_bounds(tb, &ti1, &ti2);
    cp = gtk_text_buffer_get_text(tb, &ti1, &ti2, FALSE);
    //cp1 = wlibConvertOutput(cp);
    res = strdup(cp);
    g_free(cp);
    return res;
}

/**
 * Save the text from the widget to a file
 *
 * \param bt IN the text widget
 * \param fileName IN name of save file
 * \return    TRUE is success, FALSE if not
 */

wBool_t wTextSave(wText_p bt, const char *fileName)
{
    FILE *f;
    char *cp;
    f = fopen(fileName, "w");

    if (f==NULL) {
        wNoticeEx(NT_ERROR, fileName, "Ok", NULL);
        return FALSE;
    }

    cp = wlibGetText(bt);
    fwrite(cp, 1, strlen(cp), f);
    free(cp);
    fclose(f);
    return TRUE;
}

/**
 * Begin the printing by retrieving the contents of the text box and
 * count the lines of text.
 *
 * \param operation IN the GTK print operation
 * \param context IN print context
 * \param pd IN data structure for user data
 *
 */

static void
begin_print(GtkPrintOperation *operation,
            GtkPrintContext *context,
            struct PrintData *pd)
{
    gchar *contents;
    gdouble height;
    contents =  wlibGetText(pd->tb);
    pd->lines = g_strsplit(contents, "\n", 0);
    /* Count the total number of lines in the file. */
    /* ignore the header lines */
    pd->total_lines = 6;

    while (pd->lines[pd->total_lines] != NULL) {
        pd->total_lines++;
    }

    /* Based on the height of the page and font size, calculate how many lines can be
    * rendered on a single page. A padding of 3 is placed between lines as well.
    * Space for page header, table header and footer lines is subtracted from the total size
    */
    height = gtk_print_context_get_height(context) - (pd->font_size + 3) - 2 *
             (HEADER_HEIGHT + HEADER_GAP);
    pd->lines_per_page = floor(height / (pd->font_size + 3));
    pd->total_pages = (pd->total_lines - 1) / pd->lines_per_page + 1;
    gtk_print_operation_set_n_pages(operation, pd->total_pages);
    free(contents);
}

/**
 * Draw the page, which includes a header with the file name and page number along
 * with one page of text with a font of "Monospace 10".
 *
 * \param operation IN the GTK print operation
 * \param context IN print context
 * \param page_nr IN page to print
 * \param pd IN data structure for user data
 *
 *
 */

static void
draw_page(GtkPrintOperation *operation,
          GtkPrintContext *context,
          gint page_nr,
          struct PrintData *pd)
{
    cairo_t *cr;
    PangoLayout *layout;
    gdouble width, text_height, height;
    gint line, i, text_width, layout_height;
    PangoFontDescription *desc;
    gchar *page_str;
    cr = gtk_print_context_get_cairo_context(context);
    width = gtk_print_context_get_width(context);
    layout = gtk_print_context_create_pango_layout(context);
    desc = pango_font_description_from_string("Monospace");
    pango_font_description_set_size(desc, pd->font_size * PANGO_SCALE);
    /*
     * render the header line with document type parts list on left and
     * first line of layout title on right
     */
    pango_layout_set_font_description(layout, desc);
    pango_layout_set_text(layout, pd->lines[ 0 ], -1); 	// document type
    pango_layout_set_width(layout, -1);
    pango_layout_set_alignment(layout, PANGO_ALIGN_LEFT);
    pango_layout_get_size(layout, NULL, &layout_height);
    text_height = (gdouble) layout_height / PANGO_SCALE;
    cairo_move_to(cr, 0, (HEADER_HEIGHT - text_height) / 2);
    pango_cairo_show_layout(cr, layout);
    pango_layout_set_text(layout, pd->lines[ 2 ], -1);		// layout title
    pango_layout_get_size(layout, &text_width, NULL);
    pango_layout_set_alignment(layout, PANGO_ALIGN_RIGHT);
    cairo_move_to(cr, width - (text_width / PANGO_SCALE),
                  (HEADER_HEIGHT - text_height) / 2);
    pango_cairo_show_layout(cr, layout);
    /* Render the column header */
    cairo_move_to(cr, 0, HEADER_HEIGHT + HEADER_GAP + pd->font_size + 3);
    pango_layout_set_text(layout, pd->lines[ 6 ], -1);
    pango_cairo_show_layout(cr, layout);
    cairo_rel_move_to(cr, 0, pd->font_size + 3);
    pango_layout_set_text(layout, pd->lines[ 7 ], -1);
    pango_cairo_show_layout(cr, layout);
    /* Render the page text with the specified font and size. */
    cairo_rel_move_to(cr, 0, pd->font_size + 3);
    line = page_nr * pd->lines_per_page + 8;

    for (i = 0; i < pd->lines_per_page && line < pd->total_lines; i++) {
        pango_layout_set_text(layout, pd->lines[line], -1);
        pango_cairo_show_layout(cr, layout);
        cairo_rel_move_to(cr, 0, pd->font_size + 3);
        line++;
    }

    /*
     * Render the footer line with date on the left and page number
     * on the right
     */
    pango_layout_set_text(layout, pd->lines[ 5 ], -1); 	// date
    pango_layout_set_width(layout, -1);
    pango_layout_set_alignment(layout, PANGO_ALIGN_LEFT);
    pango_layout_get_size(layout, NULL, &layout_height);
    text_height = (gdouble) layout_height / PANGO_SCALE;
    height = gtk_print_context_get_height(context);
    cairo_move_to(cr, 0, height - ((HEADER_HEIGHT - text_height) / 2));
    pango_cairo_show_layout(cr, layout);
    page_str = g_strdup_printf(_("%d of %d"), page_nr + 1,
                               pd->total_pages);  // page number
    pango_layout_set_text(layout, page_str, -1);
    pango_layout_get_size(layout, &text_width, NULL);
    pango_layout_set_alignment(layout, PANGO_ALIGN_RIGHT);
    cairo_move_to(cr, width - (text_width / PANGO_SCALE),
                  height - ((HEADER_HEIGHT - text_height) / 2));
    pango_cairo_show_layout(cr, layout);
    g_free(page_str);
    g_object_unref(layout);
    pango_font_description_free(desc);
}

/**
 * Clean up after the printing operation since it is done.
 *
 * \param operation IN the GTK print operation
 * \param context IN print context
 * \param pd IN data structure for user data
 *
 *
 */
static void
end_print(GtkPrintOperation *operation,
          GtkPrintContext *context,
          struct PrintData *pd)
{
    g_strfreev(pd->lines);
    free(pd);
}

/**
 * Print the content of a multi line text box. This function is only used
 * for printing the parts list. So it makes some assumptions on the structure
 * and the content. Change if the multi line entry is changed.
 * The deprecated gtk_text is not supported by this function.
 *
 * Thanks to Andrew Krause's book for a good starting point.
 *
 * \param bt IN the text field
 * \return    TRUE on success, FALSE on error
 */

wBool_t wTextPrint(
    wText_p bt)
{
    GtkPrintOperation *operation;
    GtkWidget *dialog;
    GError *error = NULL;
    gint res;
    struct PrintData *data;
    /* Create a new print operation, applying saved print settings if they exist. */
    operation = gtk_print_operation_new();
    WlibApplySettings(operation);
    data = malloc(sizeof(struct PrintData));
    data->font_size = 10.0;
    data->tb = bt;
    g_signal_connect(G_OBJECT(operation), "begin_print",
                     G_CALLBACK(begin_print), (gpointer) data);
    g_signal_connect(G_OBJECT(operation), "draw_page",
                     G_CALLBACK(draw_page), (gpointer) data);
    g_signal_connect(G_OBJECT(operation), "end_print",
                     G_CALLBACK(end_print), (gpointer) data);
    /* Run the default print operation that will print the selected file. */
    res = gtk_print_operation_run(operation,
                                  GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG,
                                  GTK_WINDOW(gtkMainW->gtkwin), &error);

    /* If the print operation was accepted, save the new print settings. */
    if (res == GTK_PRINT_OPERATION_RESULT_APPLY) {
        WlibSaveSettings(operation);
    }
    /* Otherwise, report that the print operation has failed. */
    else if (error) {
        dialog = gtk_message_dialog_new(GTK_WINDOW(gtkMainW->gtkwin),
                                        GTK_DIALOG_DESTROY_WITH_PARENT,
                                        GTK_MESSAGE_ERROR, GTK_BUTTONS_CLOSE,
                                        "%s",error->message);
        g_error_free(error);
        gtk_dialog_run(GTK_DIALOG(dialog));
        gtk_widget_destroy(dialog);
    }
    g_object_ref_sink(operation);
    g_object_unref(operation);
    return TRUE;
}


/**
 * Get the length of text
 *
 * \param bt IN the text widget
 * \return    length of string including terminating \0
 */

int wTextGetSize(wText_p bt)
{
    char *cp = wlibGetText(bt);
    int len = strlen(cp);
    free(cp);
    return len + 1;
}

/**
 * Get the  text
 *
 * \param bt IN the text widget
 * \param text IN the buffer
 * \param len IN maximum number of bytes to return
 * \return
 */

void wTextGetText(wText_p bt, char *text, int len)
{
    char *cp;
    cp = wlibGetText(bt);
    strncpy(text, cp, len);

    if (len > 0) {
        text[len - 1] = '\0';
    }

    free(cp);
}

/**
 * Get the  read-only state of the text entry
 *
 * \param bt IN the text widget
 * \param ro IN read only flag
 * \return
 */

void wTextSetReadonly(wText_p bt, wBool_t ro)
{
    gtk_text_view_set_editable(GTK_TEXT_VIEW(bt->text), !ro);

    if (ro) {
        bt->option |= BO_READONLY;
    } else {
        bt->option &= ~BO_READONLY;
    }
}

/**
 * check whether text has been modified
 *
 * \param bt IN the text widget
 * \return    TRUE of changed, FALSE otherwise
 */

wBool_t wTextGetModified(wText_p bt)
{
    return bt->changed;
}

/**
 * set the size of the text widget
 *
 * \param bt IN the text widget
 * \param w IN width
 * \param h IN height
 * \return
 */

void wTextSetSize(wText_p bt, wPos_t w, wPos_t h)
{
    gtk_widget_set_size_request(bt->widget, w, h);
    bt->w = w;
    bt->h = h;
}

/**
 * calculate the required size of the widget based on number of lines and columns
 * \todo this calculation is based on a fixed size font and is not useful in a generic setup
 *
 * \param bt IN the text widget
 * \param rows IN text rows
 * \param cols IN text columns
 * \param width OUT width in pixel
 * \param height OUT height in pixel
 * \return
 */

void wTextComputeSize(wText_p bt, int rows, int cols, wPos_t *width,
                      wPos_t *height)
{
    *width = rows * 7;
    *height = cols * 14;
}

/**
 * set the position of the text widget ????
 *
 * \param bt IN the text widget
 * \param pos IN position
 * \return
 */

void wTextSetPosition(wText_p bt, int pos)
{
    /* TODO */
}

/**
 * signal handler for changed signal
 *
 * \param widget IN
 * \param bt IN text entry field
 * \return
 */

static void textChanged(GtkWidget *widget, wText_p bt)
{
    if (bt == 0) {
        return;
    }

    bt->changed = TRUE;
}

/**
 * Create a multiline text entry field
 *
 * \param parent IN parent window
 * \param x IN x position
 * \param Y IN y position
 * \param helpStr IN balloon help string
 * \param labelStr IN Button label ???
 * \param option IN
 * \param width IN
 * \param valueP IN Current color ???
 * \param action IN Button callback procedure
 * \param data IN ???
 * \return 	bb handle for created text widget
 */

wText_p
wTextCreate(wWin_p	parent,
            wPos_t	x,
            wPos_t	y,
            const char 	 *helpStr,
            const char	 *labelStr,
            long	option,
            wPos_t	width,
            wPos_t	height)
{
    wText_p bt;
    GtkTextBuffer *tb;
    // create the widget
    bt = wlibAlloc(parent, B_MULTITEXT, x, y, labelStr, sizeof *bt, NULL);
    bt->width = width;
    bt->height = height;
    bt->option = option;
    wlibComputePos((wControl_p)bt);
    // create a scroll window with scroll bars that are automatically created
    bt->widget = gtk_scrolled_window_new(NULL, NULL);
    gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(bt->widget),
                                   GTK_POLICY_AUTOMATIC,
                                   GTK_POLICY_AUTOMATIC);
    // create a text view and place it inside the scroll widget
    bt->text = gtk_text_view_new();

    if (bt->text == 0) {
        abort();
    }

    gtk_container_add(GTK_CONTAINER(bt->widget), bt->text);
    // get the text buffer and add a bold tag to it
    tb = gtk_text_view_get_buffer(GTK_TEXT_VIEW(bt->text));
    gtk_text_buffer_create_tag(tb, "bold", "weight", PANGO_WEIGHT_BOLD, NULL);

    // this seems to assume some fixed size fonts, not really helpful
    if (option&BT_CHARUNITS) {
        width *= 7;
        height *= 14;
    }

    // show the widgets
    gtk_widget_show(bt->text);
    gtk_widget_show(bt->widget);
    // set the size???
    gtk_widget_set_size_request(GTK_WIDGET(bt->widget),
                                width+15/*requisition.width*/, height);

    // configure read-only mode
    if (bt->option&BO_READONLY) {
        gtk_text_view_set_editable(GTK_TEXT_VIEW(bt->text), FALSE);
        gtk_text_view_set_cursor_visible(GTK_TEXT_VIEW(bt->text), FALSE);
    }

    if (labelStr) {
        bt->labelW = wlibAddLabel((wControl_p)bt, labelStr);
    }

    wlibAddHelpString(bt->widget, helpStr);
    gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(bt->text), GTK_WRAP_WORD);
    g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(textChanged), bt);
    // place the widget in a fixed position of the parent
    gtk_fixed_put(GTK_FIXED(parent->widget), bt->widget, bt->realX, bt->realY);
    wlibControlGetSize((wControl_p)bt);
    wlibAddButton((wControl_p)bt);
    // done, return the finished widget
    return bt;
}