Remove deprecated usages
[projects/chimara/chimara.git] / libchimara / style.c
1 #include <stdio.h>
2 #include <string.h>
3 #include <math.h>
4 #include "chimara-glk-private.h"
5 #include "glk.h"
6 #include "style.h"
7 #include "magic.h"
8 #include "stream.h"
9 #include "strio.h"
10
11 extern GPrivate *glk_data_key;
12
13 static gboolean style_accept(GScanner *scanner, GTokenType token);
14 static gboolean style_accept_style_selector(GScanner *scanner, ChimaraGlk *glk);
15 static gboolean style_accept_style_hint(GScanner *scanner, GtkTextTag *current_tag);
16 static void style_copy_tag_to_textbuffer(gpointer key, gpointer tag, gpointer target_table);
17 static void text_tag_to_attr_list(GtkTextTag *tag, PangoAttrList *list);
18 GtkTextTag* gtk_text_tag_copy(GtkTextTag *tag);
19 static void style_cascade_colors(GtkTextTag *tag, GtkTextTag *glk_tag, GtkTextTag *default_tag, GdkColor **foreground, GdkColor **background);
20
21 /**
22  * glk_set_style:
23  * @styl: The style to apply
24  *
25  * Changes the style of the current output stream. @styl should be one of the
26  * <code>style_</code> constants. However, any value is actually legal; if the 
27  * interpreter does not recognize the style value, it will treat it as 
28  * %style_Normal.
29  * <note><para>
30  *  This policy allows for the future definition of styles without breaking old
31  *  Glk libraries.
32  * </para></note>
33  */
34 void
35 glk_set_style(glui32 styl)
36 {
37         ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
38         g_return_if_fail(glk_data->current_stream != NULL);
39         glk_set_style_stream(glk_data->current_stream, styl);
40 }
41
42 /* The first 11 tag names must correspond to the first 11 glk tag names as defined below */
43 static const gchar* TAG_NAMES[] = {
44         "normal",
45         "emphasized",
46         "preformatted",
47         "header",
48         "subheader",
49         "alert",
50         "note",
51         "block-quote",
52         "input",
53         "user1",
54         "user2",
55         "hyperlink",
56         "pager",
57         "default"
58 };
59
60 /* The first 11 glk tag names must correspond to the first 11 tag names as defined above */
61 static const gchar* GLK_TAG_NAMES[] = {
62         "glk-normal",
63         "glk-emphasized",
64         "glk-preformatted",
65         "glk-header",
66         "glk-subheader",
67         "glk-alert",
68         "glk-note",
69         "glk-block-quote",
70         "glk-input",
71         "glk-user1",
72         "glk-user2"
73 };
74
75 const gchar**
76 style_get_tag_names()
77 {
78         return TAG_NAMES;
79 }
80
81 /* Internal function: mapping from style enum to tag name */
82 static const gchar*
83 get_tag_name(glui32 style)
84 {
85         if(style >= CHIMARA_NUM_STYLES) {
86                 WARNING("Unsupported style");
87                 return "normal";
88         } else {
89                 return (gchar*) TAG_NAMES[style];
90         }
91 }
92
93 /* Internal function: mapping from glk style enum to tag name */
94 static const gchar*
95 get_glk_tag_name(glui32 style)
96 {
97         if(style >= style_NUMSTYLES) {
98                 WARNING("Unsupported style");
99                 return "normal";
100         } else {
101                 return (gchar*) GLK_TAG_NAMES[style];
102         }
103 }
104
105 /** 
106  * glk_set_style_stream:
107  * @str: Output stream to change the style of
108  * @styl: The style to apply
109  *
110  * This changes the style of the stream @str. See glk_set_style().
111  */
112 void
113 glk_set_style_stream(strid_t str, glui32 styl) {
114 #ifdef DEBUG_STYLES
115         g_printf("glk_set_style(str->rock=%d, styl=%d)\n", str->rock, styl);
116 #endif
117
118         if(str->window == NULL)
119                 return;
120
121         flush_window_buffer(str->window);
122         str->style = (gchar*) get_tag_name(styl);
123         str->glk_style = (gchar*) get_glk_tag_name(styl);
124 }
125
126 /* Internal function: call this to initialize the layout of the 'more' prompt. */
127 void
128 style_init_more_prompt(winid_t win)
129 {
130         ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
131
132         win->pager_layout = gtk_widget_create_pango_layout(win->widget, "More");
133         pango_layout_set_attributes(win->pager_layout, glk_data->pager_attr_list);
134 }
135
136 /* Internal function: call this to initialize the default styles to a textbuffer. */
137 void
138 style_init_textbuffer(GtkTextBuffer *buffer)
139 {
140         g_return_if_fail(buffer != NULL);
141
142         ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
143
144         /* Place the default text tags in the textbuffer's tag table */
145         g_hash_table_foreach(glk_data->styles->text_buffer, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
146
147         /* Copy the override text tags to the textbuffers's tag table */
148         g_hash_table_foreach(glk_data->glk_styles->text_buffer, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
149
150         /* Assign the 'default' tag the lowest priority */
151         gtk_text_tag_set_priority( gtk_text_tag_table_lookup(gtk_text_buffer_get_tag_table(buffer), "default"), 0 );
152 }
153
154
155 /* Internal function: call this to initialize the default styles to a textgrid. */
156 void
157 style_init_textgrid(GtkTextBuffer *buffer)
158 {
159         g_return_if_fail(buffer != NULL);
160         
161         ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
162
163         /* Place the default text tags in the textbuffer's tag table */
164         g_hash_table_foreach(glk_data->styles->text_grid, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
165
166         /* Copy the current text tags to the textbuffers's tag table */
167         g_hash_table_foreach(glk_data->glk_styles->text_grid, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
168
169         /* Assign the 'default' tag the lowest priority */
170         gtk_text_tag_set_priority( gtk_text_tag_table_lookup(gtk_text_buffer_get_tag_table(buffer), "default"), 0 );
171 }
172
173 /* Internal function used to iterate over a style table, copying it */
174 static void
175 style_copy_tag_to_textbuffer(gpointer key, gpointer tag, gpointer target_table)
176 {
177         g_return_if_fail(key != NULL);
178         g_return_if_fail(tag != NULL);
179         g_return_if_fail(target_table != NULL);
180
181         gtk_text_tag_table_add(target_table, gtk_text_tag_copy( GTK_TEXT_TAG(tag) ));
182 }
183
184 /* Internal function that copies a text tag */
185 GtkTextTag *
186 gtk_text_tag_copy(GtkTextTag *tag)
187 {
188         GtkTextTag *copy;
189
190         g_return_val_if_fail(tag != NULL, NULL);
191
192         copy = gtk_text_tag_new(tag->name);
193         gtk_text_attributes_copy_values(tag->values, copy->values);
194         
195         #define _COPY_FLAG(flag) copy->flag = tag->flag
196                 _COPY_FLAG (bg_color_set);
197                 _COPY_FLAG (bg_color_set);
198                 _COPY_FLAG (bg_stipple_set);
199                 _COPY_FLAG (fg_color_set);
200                 _COPY_FLAG (fg_stipple_set);
201                 _COPY_FLAG (justification_set);
202                 _COPY_FLAG (left_margin_set);
203                 _COPY_FLAG (indent_set);
204                 _COPY_FLAG (rise_set);
205                 _COPY_FLAG (strikethrough_set);
206                 _COPY_FLAG (right_margin_set);
207                 _COPY_FLAG (pixels_above_lines_set);
208                 _COPY_FLAG (pixels_below_lines_set);
209                 _COPY_FLAG (pixels_inside_wrap_set);
210                 _COPY_FLAG (tabs_set);
211                 _COPY_FLAG (underline_set);
212                 _COPY_FLAG (wrap_mode_set);
213                 _COPY_FLAG (bg_full_height_set);
214                 _COPY_FLAG (invisible_set);
215                 _COPY_FLAG (editable_set);
216                 _COPY_FLAG (language_set);
217                 _COPY_FLAG (scale_set);
218         #undef _COPY_FLAG
219
220         /* Copy the data that was added manually */
221         gpointer reverse_color = g_object_get_data( G_OBJECT(tag), "reverse-color" );
222
223         if(reverse_color) {
224                 g_object_set_data( G_OBJECT(copy), "reverse-color", reverse_color );
225         }
226
227         return copy;
228 }
229
230 /* Internal function that constructs the default styles */
231 void
232 style_init(ChimaraGlk *glk)
233 {
234         CHIMARA_GLK_USE_PRIVATE(glk, priv);
235         
236         GHashTable *default_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
237         GHashTable *default_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
238         GHashTable *glk_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
239         GHashTable *glk_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
240         GtkTextTag *tag;
241
242         /* Initialise the default styles for a text grid */
243         tag = gtk_text_tag_new("default");
244         g_object_set(tag, "family", "Monospace", "family-set", TRUE, NULL);
245         g_hash_table_insert(default_text_grid_styles, "default", tag);
246
247         tag = gtk_text_tag_new("normal");
248         g_hash_table_insert(default_text_grid_styles, "normal", tag);
249
250         tag = gtk_text_tag_new("emphasized");
251         g_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
252         g_hash_table_insert(default_text_grid_styles, "emphasized", tag);
253
254         tag = gtk_text_tag_new("preformatted");
255         g_hash_table_insert(default_text_grid_styles, "preformatted", tag);
256
257         tag = gtk_text_tag_new("header");
258         g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL);
259         g_hash_table_insert(default_text_grid_styles, "header", tag);
260
261         tag = gtk_text_tag_new("subheader");
262         g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL);
263         g_hash_table_insert(default_text_grid_styles, "subheader", tag);
264
265         tag = gtk_text_tag_new("alert");
266         g_object_set(tag, "foreground", "#aa0000", "foreground-set", TRUE, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL);
267         g_hash_table_insert(default_text_grid_styles, "alert", tag);
268
269         tag = gtk_text_tag_new("note");
270         g_object_set(tag, "foreground", "#aaaa00", "foreground-set", TRUE, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL);
271         g_hash_table_insert(default_text_grid_styles, "note", tag);
272
273         tag = gtk_text_tag_new("block-quote");
274         g_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
275         g_hash_table_insert(default_text_grid_styles, "block-quote", tag);
276
277         tag = gtk_text_tag_new("input");
278         g_hash_table_insert(default_text_grid_styles, "input", tag);
279
280         tag = gtk_text_tag_new("user1");
281         g_hash_table_insert(default_text_grid_styles, "user1", tag);
282
283         tag = gtk_text_tag_new("user2");
284         g_hash_table_insert(default_text_grid_styles, "user2", tag);
285
286         tag = gtk_text_tag_new("hyperlink");
287         g_object_set(tag, "foreground", "#0000ff", "foreground-set", TRUE, "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
288         g_hash_table_insert(default_text_grid_styles, "hyperlink", tag);
289
290         /* Initialise the default styles for a text buffer */
291         tag = gtk_text_tag_new("default");
292         g_object_set(tag, "family", "Serif", "family-set", TRUE, NULL);
293         g_hash_table_insert(default_text_buffer_styles, "default", tag);
294
295         tag = gtk_text_tag_new("normal");
296         g_hash_table_insert(default_text_buffer_styles, "normal", tag);
297
298         tag = gtk_text_tag_new("emphasized");
299         g_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
300         g_hash_table_insert(default_text_buffer_styles, "emphasized", tag);
301
302         tag = gtk_text_tag_new("preformatted");
303         g_object_set(tag, "family", "Monospace", "family-set", TRUE, NULL);
304         g_hash_table_insert(default_text_buffer_styles, "preformatted", tag);
305
306         tag = gtk_text_tag_new("header");
307         g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL);
308         g_hash_table_insert(default_text_buffer_styles, "header", tag);
309
310         tag = gtk_text_tag_new("subheader");
311         g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL);
312         g_hash_table_insert(default_text_buffer_styles, "subheader", tag);
313
314         tag = gtk_text_tag_new("alert");
315         g_object_set(tag, "foreground", "#aa0000", "foreground-set", TRUE, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL);
316         g_hash_table_insert(default_text_buffer_styles, "alert", tag);
317
318         tag = gtk_text_tag_new("note");
319         g_object_set(tag, "foreground", "#aaaa00", "foreground-set", TRUE, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL);
320         g_hash_table_insert(default_text_buffer_styles, "note", tag);
321
322         tag = gtk_text_tag_new("block-quote");
323         g_object_set(tag, "justification", GTK_JUSTIFY_CENTER, "justification-set", TRUE, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
324         g_hash_table_insert(default_text_buffer_styles, "block-quote", tag);
325
326         tag = gtk_text_tag_new("input");
327         g_hash_table_insert(default_text_buffer_styles, "input", tag);
328
329         tag = gtk_text_tag_new("user1");
330         g_hash_table_insert(default_text_buffer_styles, "user1", tag);
331
332         tag = gtk_text_tag_new("user2");
333         g_hash_table_insert(default_text_buffer_styles, "user2", tag);
334
335         tag = gtk_text_tag_new("hyperlink");
336         g_object_set(tag, "foreground", "#0000ff", "foreground-set", TRUE, "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
337         g_hash_table_insert(default_text_buffer_styles, "hyperlink", tag);
338
339         GtkTextTag *pager_tag = gtk_text_tag_new("pager");
340         g_object_set(pager_tag, "family", "Monospace", "family-set", TRUE, "foreground", "#ffffff", "foreground-set", TRUE, "background", "#000000", "background-set", TRUE, NULL);
341         g_hash_table_insert(default_text_buffer_styles, "pager", pager_tag);
342         text_tag_to_attr_list(pager_tag, priv->pager_attr_list);
343
344         priv->styles->text_grid = default_text_grid_styles;
345         priv->styles->text_buffer = default_text_buffer_styles;
346
347
348         /* Initialize the GLK styles to empty tags */
349         int i;
350         for(i=0; i<style_NUMSTYLES; i++) {
351                 tag = gtk_text_tag_new(GLK_TAG_NAMES[i]);
352                 g_hash_table_insert(glk_text_grid_styles, (gchar*) GLK_TAG_NAMES[i], tag);
353                 tag = gtk_text_tag_new(GLK_TAG_NAMES[i]);
354                 g_hash_table_insert(glk_text_buffer_styles, (gchar*) GLK_TAG_NAMES[i], tag);
355         }
356
357         priv->glk_styles->text_grid = glk_text_grid_styles;
358         priv->glk_styles->text_buffer = glk_text_buffer_styles;
359
360 }
361
362 /* Reset style tables to the library's internal defaults */
363 void
364 reset_default_styles(ChimaraGlk *glk)
365 {
366         /* TODO: write this function */
367 }
368
369 /* Create the CSS file scanner */
370 GScanner *
371 create_css_file_scanner(void)
372 {
373         GScanner *scanner = g_scanner_new(NULL);
374         scanner->config->cset_identifier_first = G_CSET_a_2_z G_CSET_A_2_Z "#";
375         scanner->config->cset_identifier_nth = G_CSET_a_2_z G_CSET_A_2_Z "-_" G_CSET_DIGITS;
376         scanner->config->symbol_2_token = TRUE;
377         scanner->config->cpair_comment_single = NULL;
378         scanner->config->scan_float = FALSE;
379         return scanner;
380 }
381
382 /* Run the scanner over the CSS file, overriding the default styles */
383 void
384 scan_css_file(GScanner *scanner, ChimaraGlk *glk)
385 {
386         while( g_scanner_peek_next_token(scanner) != G_TOKEN_EOF) {
387                 if( !style_accept_style_selector(scanner, glk) )
388                         break;
389         }
390
391         g_scanner_destroy(scanner);
392
393         /* Update the pager prompt to the new style */
394         style_update(glk);
395 }
396
397 /* Internal function: parses a token */
398 static gboolean
399 style_accept(GScanner *scanner, GTokenType token)
400 {
401         GTokenType next = g_scanner_get_next_token(scanner);
402         if(next != token) {
403                 g_scanner_unexp_token(scanner, token, NULL, NULL, NULL, "CSS Error", 1);
404                 return FALSE;
405         }
406         return TRUE;
407 }
408
409 /* Internal function: parses a style selector */
410 static gboolean
411 style_accept_style_selector(GScanner *scanner, ChimaraGlk *glk)
412 {
413         CHIMARA_GLK_USE_PRIVATE(glk, priv);
414
415         GtkTextTag *current_tag;
416         gchar *field;
417         GTokenType token = g_scanner_get_next_token(scanner);
418         GTokenValue value = g_scanner_cur_value(scanner);
419
420         if(
421                 token != G_TOKEN_IDENTIFIER ||
422                 ( strcmp(value.v_identifier, "buffer") && strcmp(value.v_identifier, "grid") )
423         ) {
424                 g_scanner_error(scanner, "CSS Error: buffer/grid expected");
425                 return FALSE;
426         }
427
428         field = g_strdup(value.v_identifier);
429
430         /* Parse the tag name to change */
431         if( g_scanner_peek_next_token(scanner) == '{') {
432                 style_accept(scanner, '{');
433                 if( !strcmp(field, "buffer") )
434                         current_tag = g_hash_table_lookup(priv->styles->text_buffer, "default");
435                 else
436                         current_tag = g_hash_table_lookup(priv->styles->text_grid, "default");
437         } else {
438                 if( !style_accept(scanner, '.') )
439                         return FALSE;
440
441                 token = g_scanner_get_next_token(scanner);
442                 value = g_scanner_cur_value(scanner);
443
444                 if(token != G_TOKEN_IDENTIFIER) {
445                         g_scanner_error(scanner, "CSS Error: style selector expected");
446                         return FALSE;
447                 }
448
449                 if( !strcmp(field, "buffer") )
450                         current_tag = g_hash_table_lookup(priv->styles->text_buffer, value.v_identifier);
451                 else
452                         current_tag = g_hash_table_lookup(priv->styles->text_grid, value.v_identifier);
453
454                 if(current_tag == NULL) {
455                         g_scanner_error(scanner, "CSS Error: invalid style identifier");
456                         return FALSE;
457                 }
458
459                 if( !style_accept(scanner, '{') )
460                         return FALSE;
461         }
462
463         while( g_scanner_peek_next_token(scanner) != '}') {
464                 if( !style_accept_style_hint(scanner, current_tag) )
465                         return FALSE;
466         }
467                 
468         if( !style_accept(scanner, '}') )
469                 return FALSE;
470
471         return TRUE;
472 }
473
474 /* Internal function: parses a style hint */
475 static gboolean
476 style_accept_style_hint(GScanner *scanner, GtkTextTag *current_tag)
477 {
478         GTokenType token = g_scanner_get_next_token(scanner);
479         GTokenValue value = g_scanner_cur_value(scanner);
480         gchar *hint;
481
482         if(token != G_TOKEN_IDENTIFIER) {
483                 g_scanner_error(scanner, "CSS Error: style hint expected");
484                 return FALSE;
485         }
486
487         hint = g_strdup(value.v_identifier);
488
489         if( !style_accept(scanner, ':') )
490                 return FALSE;
491
492         token = g_scanner_get_next_token(scanner);
493         value = g_scanner_cur_value(scanner);
494
495         if( !strcmp(hint, "font-family") ) {
496                 if(token != G_TOKEN_STRING) {
497                         g_scanner_error(scanner, "CSS Error: string expected");
498                         return FALSE;
499                 }
500                 g_object_set(current_tag, "family", value.v_string, "family-set", TRUE, NULL);
501         }
502         else if( !strcmp(hint, "font-weight") ) {
503                 if(token != G_TOKEN_IDENTIFIER) {
504                         g_scanner_error(scanner, "CSS Error: bold/normal expected");
505                         return FALSE;
506                 }
507
508                 if( !strcmp(value.v_identifier, "bold") )
509                         g_object_set(current_tag, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL);
510                 else if( !strcmp(value.v_identifier, "normal") )
511                         g_object_set(current_tag, "weight", PANGO_WEIGHT_NORMAL, "weight-set", TRUE, NULL);
512                 else {
513                         g_scanner_error(scanner, "CSS Error: bold/normal expected");
514                         return FALSE;
515                 }
516         }
517         else if( !strcmp(hint, "font-style") ) {
518                 if(token != G_TOKEN_IDENTIFIER) {
519                         g_scanner_error(scanner, "CSS Error: italic/normal expected");
520                         return FALSE;
521                 }
522
523                 if( !strcmp(value.v_identifier, "italic") )
524                         g_object_set(current_tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
525                 else if( !strcmp(value.v_identifier, "normal") )
526                         g_object_set(current_tag, "style", PANGO_STYLE_NORMAL, "style-set", TRUE, NULL);
527                 else {
528                         g_scanner_error(scanner, "CSS Error: italic/normal expected");
529                         return FALSE;
530                 }
531         }
532         else if( !strcmp(hint, "font-size") ) {
533                 if(token == G_TOKEN_INT) 
534                         g_object_set(current_tag, "size-points", (float)value.v_int, "size-set", TRUE, NULL);
535                 else if(token == G_TOKEN_FLOAT)
536                         g_object_set(current_tag, "size-points", value.v_float, "size-set", TRUE, NULL);
537                 else {
538                         g_scanner_error(scanner, "CSS Error: integer or float expected");
539                         return FALSE;
540                 }
541         }
542         else if( !strcmp(hint, "color") ) {
543                 if(token != G_TOKEN_IDENTIFIER) {
544                         g_scanner_error(scanner, "CSS Error: hex color expected");
545                         return FALSE;
546                 }
547
548                 g_object_set(current_tag, "foreground", value.v_identifier, "foreground-set", TRUE, NULL);
549         }
550         else if( !strcmp(hint, "background-color") ) {
551                 if(token != G_TOKEN_IDENTIFIER) {
552                         g_scanner_error(scanner, "CSS Error: hex color expected");
553                         return FALSE;
554                 }
555                 g_object_set(current_tag, "background", value.v_identifier, "background-set", TRUE, NULL);
556         }
557         else if( !strcmp(hint, "text-align") ) {
558                 if(token != G_TOKEN_IDENTIFIER) {
559                         g_scanner_error(scanner, "CSS Error: left/right/center expected");
560                         return FALSE;
561                 }
562                 
563                 if( !strcmp(value.v_identifier, "left") )
564                         g_object_set(current_tag, "justification", GTK_JUSTIFY_LEFT, "justification-set", TRUE, NULL);
565                 else if( !strcmp(value.v_identifier, "right") )
566                         g_object_set(current_tag, "justification", GTK_JUSTIFY_RIGHT, "justification-set", TRUE, NULL);
567                 else if( !strcmp(value.v_identifier, "center") )
568                         g_object_set(current_tag, "justification", GTK_JUSTIFY_CENTER, "justification-set", TRUE, NULL);
569                 else {
570                         g_scanner_error(scanner, "CSS Error: left/right/center expected");
571                         return FALSE;
572                 }
573         }
574         else if( !strcmp(hint, "margin-left") ) {
575                 if(token != G_TOKEN_INT) {
576                         g_scanner_error(scanner, "CSS Error: integer expected");
577                         return FALSE;
578                 }
579                 g_object_set(current_tag, "left-margin", value.v_int, "left-margin-set", TRUE, NULL);
580         }
581         else if( !strcmp(hint, "margin-right") ) {
582                 if(token != G_TOKEN_INT) {
583                         g_scanner_error(scanner, "CSS Error: integer expected");
584                         return FALSE;
585                 }
586                 g_object_set(current_tag, "right-margin", value.v_int, "right-margin-set", TRUE, NULL);
587         }
588         else if( !strcmp(hint, "margin-top") ) {
589                 if(token != G_TOKEN_INT) {
590                         g_scanner_error(scanner, "CSS Error: integer expected");
591                         return FALSE;
592                 }
593                 g_object_set(current_tag, "pixels-above-lines", value.v_int, "pixels-above-lines-set", TRUE, NULL);
594         }
595         else if( !strcmp(hint, "margin-bottom") ) {
596                 if(token != G_TOKEN_INT) {
597                         g_scanner_error(scanner, "CSS Error: integer expected");
598                         return FALSE;
599                 }
600                 g_object_set(current_tag, "pixels-below-lines", value.v_int, "pixels-below-lines-set", TRUE, NULL);
601         }
602                 
603         else {
604                 g_scanner_error(scanner, "CSS Error: invalid style hint %s", hint);
605                 return FALSE;
606         }
607
608         if( !style_accept(scanner, ';') )
609                 return FALSE;
610
611         return TRUE;
612 }
613
614 /* Internal function: parses a glk color to a GdkColor */
615 void
616 glkcolor_to_gdkcolor(glui32 val, GdkColor *color)
617 {
618         color->red = 256 * ((val & 0xff0000) >> 16);
619         color->green = 256 * ((val & 0x00ff00) >> 8);
620         color->blue = 256 * (val & 0x0000ff);
621 }
622
623 /* Internal function: parses a glk color to a hex string */
624 gchar*
625 glkcolor_to_hex(glui32 val)
626 {
627         return g_strdup_printf("%04X%04X%04X",
628                 256 * ((val & 0xff0000) >> 16),
629                 256 * ((val & 0x00ff00) >> 8),
630                 256 * (val & 0x0000ff)
631         );
632 }
633
634 /* Internal function: parses a gdk color to a hex string */
635 gchar*
636 gdkcolor_to_hex(GdkColor *color)
637 {
638         return g_strdup_printf("%04X%04X%04X",
639                 color->red, color->green, color->blue
640         );
641 }
642
643 /* Internal function: parses a GdkColor to a glk color */
644 static glui32
645 gdkcolor_to_glkcolor(GdkColor *color)
646 {
647         g_return_val_if_fail(color != NULL, 0);
648         return (glui32) color->pixel;
649 }
650
651 /* Internal function: changes a GTK tag to correspond with the given style. */
652 static void
653 apply_stylehint_to_tag(GtkTextTag *tag, glui32 wintype, glui32 styl, glui32 hint, glsi32 val)
654 {
655         g_return_if_fail(tag != NULL);
656
657         ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
658         GObject *tag_object = G_OBJECT(tag);
659
660         gint reverse_color = GPOINTER_TO_INT( g_object_get_data(tag_object, "reverse-color") );
661
662         int i = 0;
663         GdkColor color;
664         switch(hint) {
665         case stylehint_Indentation:
666                 g_object_set(tag_object, "left-margin", 5*val, "left-margin-set", TRUE, NULL);
667                 g_object_set(tag_object, "right-margin", 5*val, "right-margin-set", TRUE, NULL);
668                 break;
669         
670         case stylehint_ParaIndentation:
671                 g_object_set(tag_object, "indent", 5*val, "indent-set", TRUE, NULL);
672                 break;
673
674         case stylehint_Justification:
675                 switch(val) {
676                         case stylehint_just_LeftFlush:  i = GTK_JUSTIFY_LEFT; break;
677                         case stylehint_just_LeftRight:  i = GTK_JUSTIFY_FILL; break;
678                         case stylehint_just_Centered:   i = GTK_JUSTIFY_CENTER; break;
679                         case stylehint_just_RightFlush: i = GTK_JUSTIFY_RIGHT; break;
680                         default: 
681                                 WARNING("Unknown justification");
682                                 i = GTK_JUSTIFY_LEFT;
683                 }
684                 g_object_set(tag_object, "justification", i, "justification-set", TRUE, NULL);
685                 break;
686
687         case stylehint_Weight:
688                 switch(val) {
689                         case -1: i = PANGO_WEIGHT_LIGHT; break;
690                         case  0: i = PANGO_WEIGHT_NORMAL; break;
691                         case  1: i = PANGO_WEIGHT_BOLD; break;
692                         default: WARNING("Unknown font weight");
693                 }
694                 g_object_set(tag_object, "weight", i, "weight-set", TRUE, NULL);
695                 break;
696
697         case stylehint_Size:
698                 {
699                         gdouble scale = PANGO_SCALE_MEDIUM;
700                         switch(val) {
701                                 case -3: scale = PANGO_SCALE_XX_SMALL; break;
702                                 case -2: scale = PANGO_SCALE_X_SMALL; break;
703                                 case -1: scale = PANGO_SCALE_SMALL; break;
704                                 case  0: scale = PANGO_SCALE_MEDIUM; break;
705                                 case  1: scale = PANGO_SCALE_LARGE; break;
706                                 case  2: scale = PANGO_SCALE_X_LARGE; break;
707                                 case  3: scale = PANGO_SCALE_XX_LARGE; break;
708                                 default:
709                                         /* We follow Pango's convention of having each magnification
710                                         step be a scaling of 1.2 */
711                                         scale = pow(1.2, (double)val);
712                         }
713                         g_object_set(tag_object, "scale", scale, "scale-set", TRUE, NULL);
714                 }
715                 break;
716
717         case stylehint_Oblique:
718                 g_object_set(tag_object, "style", val ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL, "style-set", TRUE, NULL);
719                 break;
720
721         case stylehint_Proportional:
722         {
723                 gchar *font_family;
724                 gboolean family_set;
725
726                 if(wintype != wintype_TextBuffer) {
727                         if(val)
728                                 WARNING("Style hint 'propotional' only supported on text buffers.");
729
730                         break;
731                 }
732
733                 GtkTextTag *font_tag = g_hash_table_lookup(glk_data->styles->text_buffer, val? "default" : "preformatted");
734                 g_object_get(font_tag, "family", &font_family, "family-set", &family_set, NULL);
735                 g_object_set(tag_object, "family", font_family, "family-set", family_set, NULL);
736                 g_free(font_family);
737         }
738                 break;
739
740         case stylehint_TextColor:
741                 glkcolor_to_gdkcolor(val, &color);
742
743                 if(!reverse_color)
744                         g_object_set(tag_object, "foreground-gdk", &color, "foreground-set", TRUE, NULL);
745                 else
746                         g_object_set(tag_object, "background-gdk", &color, "background-set", TRUE, NULL);
747
748                 break;
749
750         case stylehint_BackColor:
751                 glkcolor_to_gdkcolor(val, &color);
752
753                 if(!reverse_color)
754                         g_object_set(tag_object, "background-gdk", &color, "background-set", TRUE, NULL);
755                 else
756                         g_object_set(tag_object, "foreground-gdk", &color, "background-set", TRUE, NULL);
757
758                 break;
759
760         case stylehint_ReverseColor:
761         {
762                 // Determine the current colors
763                 
764                 // If all fails, use black/white
765                 // FIXME: Use system theme here
766                 GdkColor foreground, background;
767                 gdk_color_parse("black", &foreground);
768                 gdk_color_parse("white", &background);
769                 GdkColor *current_foreground = &foreground;
770                 GdkColor *current_background = &background;
771
772                 if(wintype == wintype_TextBuffer) {
773                         GtkTextTag* default_tag = g_hash_table_lookup(glk_data->styles->text_buffer, "default");
774                         GtkTextTag* base_tag = g_hash_table_lookup(glk_data->styles->text_buffer, get_tag_name(styl));
775                         style_cascade_colors(base_tag, tag, default_tag, &current_foreground, &current_background);
776                 }
777                 else if(wintype == wintype_TextGrid) {
778                         GtkTextTag* default_tag = g_hash_table_lookup(glk_data->styles->text_grid, "default");
779                         GtkTextTag* base_tag = g_hash_table_lookup(glk_data->styles->text_grid, get_tag_name(styl));
780                         style_cascade_colors(base_tag, tag, default_tag, &current_foreground, &current_background);
781                 }
782
783                 if(val) {
784                         /* Flip the fore- and background colors */
785                         GdkColor *temp = current_foreground;
786                         current_foreground = current_background;
787                         current_background = temp;
788                 }
789
790                 g_object_set(tag,
791                         "foreground-gdk", current_foreground,
792                         "foreground-set", TRUE,
793                         "background-gdk", current_background,
794                         "background-set", TRUE,
795                         NULL
796                 );
797
798                 g_object_set_data( tag_object, "reverse-color", GINT_TO_POINTER(val != 0) );
799                 break;
800         }
801
802         default:
803                 WARNING("Unknown style hint");
804         }
805 }
806
807 /* Internal function: queries a text tag for the value of a given style hint */
808 static gint
809 query_tag(GtkTextTag *tag, glui32 wintype, glui32 hint)
810 {
811         gint intval;
812         gdouble doubleval;
813         GdkColor *colval;
814
815         g_return_val_if_fail(tag != NULL, 0);
816
817         ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
818
819         switch(hint) {
820         case stylehint_Indentation:
821                 g_object_get(tag, "left_margin", &intval, NULL);
822                 return intval/5;
823         
824         case stylehint_ParaIndentation:
825                 g_object_get(tag, "indent", &intval, NULL);
826                 return intval/5;
827
828         case stylehint_Justification:
829                 g_object_get(tag, "justification", &intval, NULL);
830                 switch(intval) {
831                         case GTK_JUSTIFY_LEFT: return stylehint_just_LeftFlush;
832                         case GTK_JUSTIFY_FILL: return stylehint_just_LeftRight;
833                         case GTK_JUSTIFY_CENTER: return stylehint_just_Centered;
834                         case GTK_JUSTIFY_RIGHT: return stylehint_just_RightFlush;
835                         default: 
836                                 WARNING("Unknown justification");
837                                 return stylehint_just_LeftFlush;
838                 }
839
840         case stylehint_Weight:
841                 g_object_get(tag, "weight", &intval, NULL);
842                 switch(intval) {
843                         case PANGO_WEIGHT_LIGHT: return -1;
844                         case PANGO_WEIGHT_NORMAL: return 0;
845                         case PANGO_WEIGHT_BOLD: return 1;
846                         default: WARNING("Unknown font weight"); return 0;
847                 }
848
849         case stylehint_Size:
850                 g_object_get(tag, "scale", &doubleval, NULL);
851                 return (gint)round(log(doubleval) / log(1.2));
852
853         case stylehint_Oblique:
854                 g_object_get(tag, "style", &intval , NULL);
855                 return intval == PANGO_STYLE_ITALIC ? 1 : 0;
856
857         case stylehint_Proportional:
858                 /* Use pango_font_family_is_monospace()? */
859         {
860                 gchar *font_family, *query_font_family;
861                 GtkTextTag *font_tag = g_hash_table_lookup(
862                     wintype == wintype_TextBuffer? glk_data->styles->text_buffer : glk_data->styles->text_grid,
863                     "preformatted");
864                 g_object_get(font_tag, "family", &font_family, NULL);
865                 g_object_get(tag, "family", &query_font_family, NULL);
866                 gint retval = strcmp(font_family, query_font_family)? 0 : 1;
867                 g_free(font_family);
868                 g_free(query_font_family);
869                 return retval;
870         }
871
872         case stylehint_TextColor:
873                 g_object_get(tag, "foreground-gdk", &colval, NULL);
874                 return gdkcolor_to_glkcolor(colval);
875
876         case stylehint_BackColor:
877                 g_object_get(tag, "background-gdk", &colval, NULL);
878                 return gdkcolor_to_glkcolor(colval);
879
880         case stylehint_ReverseColor:
881                 return GPOINTER_TO_INT( g_object_get_data(G_OBJECT(tag), "reverse_color") );
882
883         default:
884                 WARNING("Unknown style hint");
885         }
886         
887         return 0;
888 }
889
890 /**
891  * glk_stylehint_set:
892  * @wintype: The window type to set a style hint on, or %wintype_AllTypes.
893  * @styl: The style to set a hint for.
894  * @hint: The type of style hint, one of the <code>stylehint_</code> constants.
895  * @val: The style hint. The meaning of this depends on @hint.
896  *
897  * Sets a hint about the appearance of one style for a particular type of 
898  * window. You can also set @wintype to %wintype_AllTypes, which sets a hint for 
899  * all types of window.
900  * <note><para>
901  *  There is no equivalent constant to set a hint for all styles of a single 
902  *  window type.
903  * </para></note>
904  */
905 void
906 glk_stylehint_set(glui32 wintype, glui32 styl, glui32 hint, glsi32 val)
907 {
908 #ifdef DEBUG_STYLES
909         g_printf("glk_stylehint_set(wintype=%d, styl=%d, hint=%d, val=%d)\n", wintype, styl, hint, val);
910 #endif
911
912         ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
913
914         GtkTextTag *to_change;
915         if(wintype == wintype_TextBuffer || wintype == wintype_AllTypes) {
916                 to_change = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) );
917                 apply_stylehint_to_tag(to_change, wintype_TextBuffer, styl, hint, val);
918         }
919
920         if(wintype == wintype_TextGrid || wintype == wintype_AllTypes) {
921                 to_change = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) );
922                 apply_stylehint_to_tag(to_change, wintype_TextGrid, styl, hint, val);
923         }
924 }
925
926 /**
927  * glk_stylehint_clear:
928  * @wintype: The window type to set a style hint on, or %wintype_AllTypes.
929  * @styl: The style to set a hint for.
930  * @hint: The type of style hint, one of the <code>stylehint_</code> constants.
931  *
932  * Clears a hint about the appearance of one style for a particular type of 
933  * window to its default value. You can also set @wintype to %wintype_AllTypes, 
934  * which clears a hint for all types of window.
935  * <note><para>
936  *  There is no equivalent constant to reset a hint for all styles of a single 
937  *  window type.
938  * </para></note>
939  */
940 void
941 glk_stylehint_clear(glui32 wintype, glui32 styl, glui32 hint)
942 {
943 #ifdef DEBUG_STYLES
944         g_printf("glk_stylehint_clear(wintype=%d, styl=%d, hint=%d)\n", wintype, styl, hint);
945 #endif
946
947         ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
948         GtkTextTag *tag;
949
950         switch(wintype) {
951         case wintype_TextBuffer:
952                 tag = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) );
953                 if(tag) {
954                         glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) );
955                 }
956                 break;
957         case wintype_TextGrid:
958                 tag = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) );
959                 if(tag) {
960                         glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) );
961                 }
962         default:
963                 return;
964         }
965 }
966
967 /**
968  * glk_style_distinguish:
969  * @win: The window in which the styles are to be distinguished.
970  * @styl1: The first style to be distinguished from the second style.
971  * @styl2: The second style to be distinguished from the first style.
972  * 
973  * Decides whether two styles are visually distinguishable in the given window.
974  * The exact meaning of this is left for the library to determine.
975  * <note><title>Chimara</title><para>
976  *   Currently, all styles of one window are assumed to be mutually
977  *   distinguishable.
978  * </para></note>
979  * 
980  * Returns: %TRUE (1) if the two styles are visually distinguishable. If they 
981  * are not, it returns %FALSE (0).
982  */
983 glui32
984 glk_style_distinguish(winid_t win, glui32 styl1, glui32 styl2)
985 {
986 #ifdef DEBUG_STYLES
987         g_printf("glk_style_distinguish(win->rock=%d, styl1=%d, styl2=%d)\n", win->rock, styl1, styl2);
988 #endif
989
990         /* FIXME */
991         return styl1 != styl2;
992 }
993
994 /**
995  * glk_style_measure:
996  * @win: The window from which to take the style.
997  * @styl: The style to perform the measurement on.
998  * @hint: The stylehint to measure.
999  * @result: Address to write the result to.
1000  * 
1001  * Tries to test an attribute of one style in the given window @win. The library
1002  * may not be able to determine the attribute; if not, this returns %FALSE (0).
1003  * If it can, it returns %TRUE (1) and stores the value in the location pointed
1004  * at by @result. 
1005  * <note><para>
1006  *   As usual, it is legal for @result to be %NULL, although fairly pointless.
1007  * </para></note>
1008  *
1009  * The meaning of the value depends on the hint which was tested:
1010  * <variablelist>
1011  * <varlistentry>
1012  *   <term>%stylehint_Indentation, %stylehint_ParaIndentation</term>
1013  *   <listitem><para>The indentation and paragraph indentation. These are in a
1014  *   metric which is platform-dependent.</para>
1015  *   <note><para>Most likely either characters or pixels.</para></note>
1016  *   </listitem>
1017  * </varlistentry>
1018  * <varlistentry>
1019  *   <term>%stylehint_Justification</term>
1020  *   <listitem><para>One of the constants %stylehint_just_LeftFlush,
1021  *   %stylehint_just_LeftRight, %stylehint_just_Centered, or
1022  *   %stylehint_just_RightFlush.</para></listitem>
1023  * </varlistentry>
1024  * <varlistentry>
1025  *   <term>%stylehint_Size</term>
1026  *   <listitem><para>The font size. Again, this is in a platform-dependent
1027  *   metric.</para>
1028  *   <note><para>Pixels, points, or simply 1 if the library does not support
1029  *   varying font sizes.</para></note>
1030  *   </listitem>
1031  * </varlistentry>
1032  * <varlistentry>
1033  *   <term>%stylehint_Weight</term>
1034  *   <listitem><para>1 for heavy-weight fonts (boldface), 0 for normal weight,
1035  *   and -1 for light-weight fonts.</para></listitem>
1036  * </varlistentry>
1037  * <varlistentry>
1038  *   <term>%stylehint_Oblique</term>
1039  *   <listitem><para>1 for oblique fonts (italic), or 0 for normal angle.</para>
1040  *   </listitem>
1041  * </varlistentry>
1042  * <varlistentry>
1043  *   <term>%stylehint_Proportional</term>
1044  *   <listitem><para>1 for proportional-width fonts, or 0 for fixed-width.
1045  *   </para></listitem>
1046  * </varlistentry>
1047  * <varlistentry>
1048  *   <term>%stylehint_TextColor, %stylehint_BackColor</term>
1049  *   <listitem><para>These are values from 0x00000000 to 0x00FFFFFF, encoded as
1050  *   described in <link 
1051  *   linkend="chimara-Suggesting-the-Appearance-of-Styles">Suggesting the
1052  *   Appearance of Styles</link>.</para></listitem>
1053  * </varlistentry>
1054  * <varlistentry>
1055  *   <term>%stylehint_ReverseColor</term>
1056  *   <listitem><para>0 for normal printing, 1 if the foreground and background
1057  *   colors are reversed.</para></listitem>
1058  * </varlistentry>
1059  * </variablelist>
1060  * Signed values, such as the %stylehint_Weight value, are cast to
1061  * <type>glui32</type>. They may be cast to <type>glsi32</type> to be dealt with
1062  * in a more natural context.
1063  * 
1064  * Returns: TRUE upon successul retrieval, otherwise FALSE.
1065  */
1066 glui32
1067 glk_style_measure(winid_t win, glui32 styl, glui32 hint, glui32 *result)
1068 {
1069 #ifdef DEBUG_STYLES
1070         g_printf("glk_style_measure(win->rock=%d, styl=%d, hint=%d, result=...)\n", win->rock, styl, hint);
1071 #endif
1072
1073         ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
1074         GtkTextTag *tag;
1075
1076         switch(win->type) {
1077         case wintype_TextBuffer:
1078                 tag = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) );
1079                 if(result)
1080                         *result = query_tag(tag, win->type, hint);
1081                 break;
1082         case wintype_TextGrid:
1083                 tag = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) );
1084                 if(result)
1085                         *result = query_tag(tag, win->type, hint);
1086         default:
1087                 return FALSE;
1088         }
1089
1090         return TRUE;
1091 }
1092
1093 /* Internal function returning the current default font for a window type
1094  * This can be used later for size calculations. Only wintype_TextGrid and wintype_TextBuffer are
1095  * supported for now */
1096 PangoFontDescription *
1097 get_current_font(guint32 wintype)
1098 {
1099         ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
1100         GtkTextTag *tag;
1101
1102         switch(wintype) {
1103         case wintype_TextGrid:
1104                 tag = g_hash_table_lookup(glk_data->styles->text_grid, "default");
1105                 return pango_font_description_from_string("Monospace");
1106                 break;
1107         case wintype_TextBuffer:
1108                 tag = g_hash_table_lookup(glk_data->styles->text_buffer, "default");
1109                 return pango_font_description_from_string("Serif");
1110                 break;
1111         default:
1112                 return NULL;
1113         }
1114
1115         PangoFontDescription *font;
1116         return font;
1117 }
1118
1119 /* Internal function copying the attributes of a text tag to a pango attribute list */
1120 static void
1121 text_tag_to_attr_list(GtkTextTag *tag, PangoAttrList *list)
1122 {
1123         gboolean set;
1124         GdkColor *foreground, *background;
1125         gchar *string;
1126         PangoFontDescription *font_desc;
1127         gboolean strikethrough;
1128         PangoUnderline underline;
1129
1130         g_object_get(tag, "foreground-set", &set, "foreground-gdk", &foreground, NULL);
1131         if(set) {
1132                 pango_attr_list_insert(
1133                         list,
1134                         pango_attr_foreground_new(foreground->red, foreground->green, foreground->blue)
1135                 );
1136         }
1137         g_object_get(tag, "background-set", &set, "background-gdk", &background, NULL);
1138         if(set) {
1139                 pango_attr_list_insert(
1140                         list,
1141                         pango_attr_background_new(background->red, background->green, background->blue)
1142                 );
1143         }
1144         g_object_get(tag, "language-set", &set, "language", &string, NULL);
1145         if(set) {
1146                 pango_attr_list_insert(
1147                         list,
1148                         pango_attr_language_new( pango_language_from_string(string) )
1149                 );
1150         }
1151
1152         /* Font description updates the following properties simultaniously:
1153          * family, style, weight, variant, stretch, size.
1154          * FIXME: Except it doesn't really.
1155          */
1156         g_object_get(tag, "font-desc", &font_desc, NULL);
1157         pango_attr_list_insert(
1158                 list,
1159                 pango_attr_font_desc_new(font_desc)
1160         );
1161
1162         g_object_get(tag, "strikethrough-set", &set, "strikethrough", &strikethrough, NULL);
1163         if(set) {
1164                 pango_attr_list_insert(
1165                         list,
1166                         pango_attr_strikethrough_new(strikethrough)
1167                 );
1168         }
1169         g_object_get(tag, "underline-set", &set, "underline", &underline, NULL);
1170         if(set) {
1171                 pango_attr_list_insert(
1172                         list,
1173                         pango_attr_underline_new(underline)
1174                 );
1175         }
1176 }
1177
1178 /* Update pager tag */
1179 void
1180 style_update(ChimaraGlk *glk)
1181 {
1182         CHIMARA_GLK_USE_PRIVATE(glk, priv);
1183
1184         GtkTextTag *pager_tag = GTK_TEXT_TAG( g_hash_table_lookup(priv->styles->text_buffer, "pager") );
1185         text_tag_to_attr_list(pager_tag, priv->pager_attr_list);
1186 }
1187
1188 /* Determine the current colors used to render the text for a given stream. 
1189  * This can be set in a number of places */
1190 static void
1191 style_cascade_colors(GtkTextTag *tag, GtkTextTag *glk_tag, GtkTextTag *default_tag, GdkColor **foreground, GdkColor **background)
1192 {
1193         gboolean foreground_set = FALSE;
1194         gboolean background_set = FALSE;
1195         gint reverse_color;
1196
1197         // Default color
1198         reverse_color = GPOINTER_TO_INT( g_object_get_data(G_OBJECT(default_tag), "reverse-color") );
1199         g_object_get(default_tag, "foreground-set", &foreground_set, "background-set", &background_set, NULL);
1200         if(foreground_set)
1201                 g_object_get(default_tag, "foreground-gdk", reverse_color ? background:foreground, NULL);
1202         if(background_set)
1203                 g_object_get(default_tag, "background-gdk", reverse_color ? foreground:background, NULL);
1204
1205         // Player defined color
1206         reverse_color = GPOINTER_TO_INT( g_object_get_data(G_OBJECT(tag), "reverse-color") );
1207         g_object_get(tag, "foreground-set", &foreground_set, "background-set", &background_set, NULL);
1208         if(foreground_set)
1209                 g_object_get(tag, "foreground-gdk", reverse_color ? background:foreground, NULL);
1210         if(background_set)
1211                 g_object_get(tag, "background-gdk", reverse_color ? foreground:background, NULL);
1212
1213         // GLK defined color
1214         reverse_color = GPOINTER_TO_INT( g_object_get_data(G_OBJECT(glk_tag), "reverse-color") );
1215         g_object_get(glk_tag, "foreground-set", &foreground_set, "background-set", &background_set, NULL);
1216         if(foreground_set)
1217                 g_object_get(glk_tag, "foreground-gdk", reverse_color ? background:foreground, NULL);
1218         if(background_set)
1219                 g_object_get(glk_tag, "background-gdk", reverse_color ? foreground:background, NULL);
1220
1221 }
1222
1223 /* Determine the current colors used to render the text for a given stream. 
1224  * This can be set in a number of places */
1225 void
1226 style_stream_colors(strid_t str, GdkColor **foreground, GdkColor **background)
1227 {
1228         VALID_STREAM(str, return);
1229         g_return_if_fail(str->window != NULL);
1230         g_return_if_fail(str->window->type != wintype_TextBuffer || str->window->type != wintype_TextGrid);
1231         
1232         GtkTextBuffer *buffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW(str->window->widget) ); 
1233         GtkTextTagTable *tags = gtk_text_buffer_get_tag_table(buffer);
1234         GtkTextTag* default_tag = gtk_text_tag_table_lookup(tags, "default");
1235         GtkTextTag* tag = gtk_text_tag_table_lookup(tags, str->style);
1236         GtkTextTag* glk_tag = gtk_text_tag_table_lookup(tags, str->glk_style);
1237
1238         style_cascade_colors(tag, glk_tag, default_tag, foreground, background);
1239
1240         gboolean foreground_set, background_set;
1241
1242         // Windows can have zcolors defined
1243         if(str->window->zcolor) {
1244                 g_object_get(str->window->zcolor, "foreground-set", &foreground_set, "background-set", &background_set, NULL);
1245                 if(foreground_set)
1246                         g_object_get(str->window->zcolor, "foreground-gdk", foreground, NULL);
1247                 if(background_set)
1248                         g_object_get(str->window->zcolor, "background-gdk", background, NULL);
1249         }
1250 }