3 #include "chimara-glk-private.h"
10 extern GPrivate *glk_data_key;
12 static gboolean style_accept(GScanner *scanner, GTokenType token);
13 static gboolean style_accept_style_selector(GScanner *scanner, ChimaraGlk *glk);
14 static gboolean style_accept_style_hint(GScanner *scanner, GtkTextTag *current_tag);
15 static void style_add_tag_to_textbuffer(gpointer key, gpointer tag, gpointer tag_table);
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);
22 * @styl: The style to apply
24 * Changes the style of the current output stream. @styl should be one of the
25 * <code>style_</code> constants. However, any value is actually legal; if the
26 * interpreter does not recognize the style value, it will treat it as
29 * This policy allows for the future definition of styles without breaking old
34 glk_set_style(glui32 styl)
36 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
37 g_return_if_fail(glk_data->current_stream != NULL);
38 glk_set_style_stream(glk_data->current_stream, styl);
41 static const gchar* TAG_NAMES[] = {
58 static const gchar* GLK_TAG_NAMES[] = {
78 /* Internal function: mapping from style enum to tag name */
80 get_tag_name(glui32 style)
82 if(style >= CHIMARA_NUM_STYLES) {
83 WARNING("Unsupported style");
86 return (gchar*) TAG_NAMES[style];
90 /* Internal function: mapping from glk style enum to tag name */
92 get_glk_tag_name(glui32 style)
94 if(style >= style_NUMSTYLES) {
95 WARNING("Unsupported style");
98 return (gchar*) GLK_TAG_NAMES[style];
103 * glk_set_style_stream:
104 * @str: Output stream to change the style of
105 * @styl: The style to apply
107 * This changes the style of the stream @str. See glk_set_style().
110 glk_set_style_stream(strid_t str, glui32 styl) {
111 if(str->window == NULL)
114 flush_window_buffer(str->window);
115 str->style = (gchar*) get_tag_name(styl);
116 str->glk_style = (gchar*) get_glk_tag_name(styl);
119 /* Internal function: call this to initialize the layout of the 'more' prompt. */
121 style_init_more_prompt(winid_t win)
123 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
125 win->pager_layout = gtk_widget_create_pango_layout(win->widget, "More");
126 pango_layout_set_attributes(win->pager_layout, glk_data->pager_attr_list);
129 /* Internal function: call this to initialize the default styles to a textbuffer. */
131 style_init_textbuffer(GtkTextBuffer *buffer)
133 g_return_if_fail(buffer != NULL);
135 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
137 /* Place the default text tags in the textbuffer's tag table */
138 g_hash_table_foreach(glk_data->styles->text_buffer, style_add_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
140 /* Copy the override text tags to the textbuffers's tag table */
141 g_hash_table_foreach(glk_data->glk_styles->text_buffer, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
145 /* Internal function: call this to initialize the default styles to a textgrid. */
147 style_init_textgrid(GtkTextBuffer *buffer)
149 g_return_if_fail(buffer != NULL);
151 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
153 /* Place the default text tags in the textbuffer's tag table */
154 g_hash_table_foreach(glk_data->styles->text_grid, style_add_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
156 /* Copy the current text tags to the textbuffers's tag table */
157 g_hash_table_foreach(glk_data->glk_styles->text_grid, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
160 /* Internal function used to iterate over the default text tag table, applying them to a textbuffer */
162 style_add_tag_to_textbuffer(gpointer key, gpointer tag, gpointer tag_table)
164 g_return_if_fail(key != NULL);
165 g_return_if_fail(tag != NULL);
166 g_return_if_fail(tag_table != NULL);
168 gtk_text_tag_table_add(tag_table, tag);
171 /* Internal function used to iterate over a style table, copying it */
173 style_copy_tag_to_textbuffer(gpointer key, gpointer tag, gpointer target_table)
175 g_return_if_fail(key != NULL);
176 g_return_if_fail(tag != NULL);
177 g_return_if_fail(target_table != NULL);
179 gtk_text_tag_table_add(target_table, gtk_text_tag_copy( GTK_TEXT_TAG(tag) ));
182 /* Internal function that copies a text tag */
184 gtk_text_tag_copy(GtkTextTag *tag)
188 g_return_val_if_fail(tag != NULL, NULL);
190 copy = gtk_text_tag_new(tag->name);
191 gtk_text_attributes_copy_values(tag->values, copy->values);
193 #define _COPY_FLAG(flag) copy->flag = tag->flag
194 _COPY_FLAG (bg_color_set);
195 _COPY_FLAG (bg_color_set);
196 _COPY_FLAG (bg_stipple_set);
197 _COPY_FLAG (fg_color_set);
198 _COPY_FLAG (fg_stipple_set);
199 _COPY_FLAG (justification_set);
200 _COPY_FLAG (left_margin_set);
201 _COPY_FLAG (indent_set);
202 _COPY_FLAG (rise_set);
203 _COPY_FLAG (strikethrough_set);
204 _COPY_FLAG (right_margin_set);
205 _COPY_FLAG (pixels_above_lines_set);
206 _COPY_FLAG (pixels_below_lines_set);
207 _COPY_FLAG (pixels_inside_wrap_set);
208 _COPY_FLAG (tabs_set);
209 _COPY_FLAG (underline_set);
210 _COPY_FLAG (wrap_mode_set);
211 _COPY_FLAG (bg_full_height_set);
212 _COPY_FLAG (invisible_set);
213 _COPY_FLAG (editable_set);
214 _COPY_FLAG (language_set);
217 /* Copy the data that was added manually */
218 gpointer reverse_color = g_object_get_data( G_OBJECT(tag), "reverse_color" );
221 g_object_set_data( G_OBJECT(copy), "reverse_color", reverse_color );
226 /* Internal function that constructs the default styles */
228 style_init(ChimaraGlk *glk)
230 CHIMARA_GLK_USE_PRIVATE(glk, priv);
232 GHashTable *default_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
233 GHashTable *default_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
234 GHashTable *glk_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
235 GHashTable *glk_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
238 PangoFontDescription *default_font_desc = pango_font_description_from_string("Serif");
239 PangoFontDescription *monospace_font_desc = pango_font_description_from_string("Monospace");
241 /* Initialise the default styles for a text grid */
242 tag = gtk_text_tag_new("default");
243 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
244 g_hash_table_insert(default_text_grid_styles, "default", tag);
246 tag = gtk_text_tag_new("normal");
247 //g_object_set(tag, "font-desc", monospace_font_desc, NULL);
248 g_hash_table_insert(default_text_grid_styles, "normal", tag);
250 tag = gtk_text_tag_new("emphasized");
251 //g_object_set(tag, "font-desc", monospace_font_desc, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
252 g_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
253 g_hash_table_insert(default_text_grid_styles, "emphasized", tag);
255 tag = gtk_text_tag_new("preformatted");
256 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
257 g_hash_table_insert(default_text_grid_styles, "preformatted", tag);
259 tag = gtk_text_tag_new("header");
260 //g_object_set(tag, "font-desc", monospace_font_desc, "weight", PANGO_WEIGHT_BOLD, NULL);
261 g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, NULL);
262 g_hash_table_insert(default_text_grid_styles, "header", tag);
264 tag = gtk_text_tag_new("subheader");
265 //g_object_set(tag, "font-desc", monospace_font_desc, "weight", PANGO_WEIGHT_BOLD, NULL);
266 g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, NULL);
267 g_hash_table_insert(default_text_grid_styles, "subheader", tag);
269 tag = gtk_text_tag_new("alert");
270 //g_object_set(tag, "font-desc", monospace_font_desc, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
271 g_object_set(tag, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
272 g_hash_table_insert(default_text_grid_styles, "alert", tag);
274 tag = gtk_text_tag_new("note");
275 //g_object_set(tag, "font-desc", monospace_font_desc, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
276 g_object_set(tag, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
277 g_hash_table_insert(default_text_grid_styles, "note", tag);
279 tag = gtk_text_tag_new("block-quote");
280 //g_object_set(tag, "font-desc", monospace_font_desc, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
281 g_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
282 g_hash_table_insert(default_text_grid_styles, "block-quote", tag);
284 tag = gtk_text_tag_new("input");
285 //g_object_set(tag, "font-desc", monospace_font_desc, NULL);
286 g_hash_table_insert(default_text_grid_styles, "input", tag);
288 tag = gtk_text_tag_new("user1");
289 //g_object_set(tag, "font-desc", monospace_font_desc, NULL);
290 g_hash_table_insert(default_text_grid_styles, "user1", tag);
292 tag = gtk_text_tag_new("user2");
293 //g_object_set(tag, "font-desc", monospace_font_desc, NULL);
294 g_hash_table_insert(default_text_grid_styles, "user2", tag);
296 tag = gtk_text_tag_new("hyperlink");
297 g_object_set(tag, "foreground", "#0000ff", "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
298 g_hash_table_insert(default_text_grid_styles, "hyperlink", tag);
300 /* Initialise the default styles for a text buffer */
301 tag = gtk_text_tag_new("default");
302 g_object_set(tag, "font-desc", default_font_desc, NULL);
303 g_hash_table_insert(default_text_buffer_styles, "default", tag);
305 tag = gtk_text_tag_new("normal");
306 //g_object_set(tag, "font-desc", default_font_desc, NULL);
307 g_hash_table_insert(default_text_buffer_styles, "normal", tag);
309 tag = gtk_text_tag_new("emphasized");
310 //g_object_set(tag, "font-desc", default_font_desc, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
311 g_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
312 g_hash_table_insert(default_text_buffer_styles, "emphasized", tag);
314 tag = gtk_text_tag_new("preformatted");
315 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
316 g_hash_table_insert(default_text_buffer_styles, "preformatted", tag);
318 tag = gtk_text_tag_new("header");
319 //g_object_set(tag, "font-desc", default_font_desc, "size-points", 18.0, "weight", PANGO_WEIGHT_BOLD, NULL);
320 g_object_set(tag, "size-points", 18.0, "weight", PANGO_WEIGHT_BOLD, NULL);
321 g_hash_table_insert(default_text_buffer_styles, "header", tag);
323 tag = gtk_text_tag_new("subheader");
324 //g_object_set(tag, "font-desc", default_font_desc, "size-points", 14.0, "weight", PANGO_WEIGHT_BOLD, NULL);
325 g_object_set(tag, "size-points", 14.0, "weight", PANGO_WEIGHT_BOLD, NULL);
326 g_hash_table_insert(default_text_buffer_styles, "subheader", tag);
328 tag = gtk_text_tag_new("alert");
329 //g_object_set(tag, "font-desc", default_font_desc, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
330 g_object_set(tag, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
331 g_hash_table_insert(default_text_buffer_styles, "alert", tag);
333 tag = gtk_text_tag_new("note");
334 //g_object_set(tag, "font-desc", default_font_desc, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
335 g_object_set(tag, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
336 g_hash_table_insert(default_text_buffer_styles, "note", tag);
338 tag = gtk_text_tag_new("block-quote");
339 //g_object_set(tag, "font-desc", default_font_desc, "justification", GTK_JUSTIFY_CENTER, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
340 g_object_set(tag, "justification", GTK_JUSTIFY_CENTER, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
341 g_hash_table_insert(default_text_buffer_styles, "block-quote", tag);
343 tag = gtk_text_tag_new("input");
344 //g_object_set(tag, "font-desc", default_font_desc, NULL);
345 g_hash_table_insert(default_text_buffer_styles, "input", tag);
347 tag = gtk_text_tag_new("user1");
348 //g_object_set(tag, "font-desc", default_font_desc, NULL);
349 g_hash_table_insert(default_text_buffer_styles, "user1", tag);
351 tag = gtk_text_tag_new("user2");
352 //g_object_set(tag, "font-desc", default_font_desc, NULL);
353 g_hash_table_insert(default_text_buffer_styles, "user2", tag);
355 tag = gtk_text_tag_new("hyperlink");
356 //g_object_set(tag, "font-desc", default_font_desc, "foreground", "#0000ff", "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
357 g_object_set(tag, "foreground", "#0000ff", "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
358 g_hash_table_insert(default_text_buffer_styles, "hyperlink", tag);
360 GtkTextTag *pager_tag = gtk_text_tag_new("pager");
361 g_object_set(pager_tag, "font-desc", default_font_desc, "foreground", "#ffffff", "background", "#000000", NULL);
362 g_hash_table_insert(default_text_buffer_styles, "pager", pager_tag);
363 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);
365 pango_font_description_free(default_font_desc);
366 pango_font_description_free(monospace_font_desc);
368 priv->styles->text_grid = default_text_grid_styles;
369 priv->styles->text_buffer = default_text_buffer_styles;
372 /* Initialize the GLK styles to empty tags */
374 for(i=0; i<style_NUMSTYLES; i++) {
375 tag = gtk_text_tag_new(GLK_TAG_NAMES[i]);
376 g_hash_table_insert(glk_text_grid_styles, (gchar*) GLK_TAG_NAMES[i], tag);
377 g_hash_table_insert(glk_text_buffer_styles, (gchar*) GLK_TAG_NAMES[i], tag);
380 priv->glk_styles->text_grid = glk_text_grid_styles;
381 priv->glk_styles->text_buffer = glk_text_buffer_styles;
385 /* Reset style tables to the library's internal defaults */
387 reset_default_styles(ChimaraGlk *glk)
389 /* TODO: write this function */
392 /* Copy the default styles to the current styles
393 FIXME: This function is temporary and will not be needed later on */
395 copy_default_styles_to_current_styles(ChimaraGlk *glk)
398 CHIMARA_GLK_USE_PRIVATE(glk, priv);
399 g_hash_table_foreach(priv->styles->text_grid, style_table_copy, priv->glk_styles->text_grid);
400 g_hash_table_foreach(priv->styles->text_buffer, style_table_copy, priv->glk_styles->text_buffer);
402 GtkTextTag *pager_tag = GTK_TEXT_TAG( g_hash_table_lookup(priv->styles->text_buffer, "pager") );
403 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);
407 /* Create the CSS file scanner */
409 create_css_file_scanner(void)
411 GScanner *scanner = g_scanner_new(NULL);
412 scanner->config->cset_identifier_first = G_CSET_a_2_z G_CSET_A_2_Z "#";
413 scanner->config->cset_identifier_nth = G_CSET_a_2_z G_CSET_A_2_Z "-_" G_CSET_DIGITS;
414 scanner->config->symbol_2_token = TRUE;
415 scanner->config->cpair_comment_single = NULL;
416 scanner->config->scan_float = FALSE;
420 /* Run the scanner over the CSS file, overriding the default styles */
422 scan_css_file(GScanner *scanner, ChimaraGlk *glk)
424 CHIMARA_GLK_USE_PRIVATE(glk, priv);
426 while( g_scanner_peek_next_token(scanner) != G_TOKEN_EOF) {
427 if( !style_accept_style_selector(scanner, glk) )
431 g_scanner_destroy(scanner);
433 /* Update the pager prompt to the new style */
434 GtkTextTag *pager_tag = GTK_TEXT_TAG( g_hash_table_lookup(priv->styles->text_buffer, "pager") );
435 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);
438 /* Internal function: parses a token */
440 style_accept(GScanner *scanner, GTokenType token)
442 GTokenType next = g_scanner_get_next_token(scanner);
444 g_scanner_unexp_token(scanner, token, NULL, NULL, NULL, "CSS Error", 1);
450 /* Internal function: parses a style selector */
452 style_accept_style_selector(GScanner *scanner, ChimaraGlk *glk)
454 CHIMARA_GLK_USE_PRIVATE(glk, priv);
456 GtkTextTag *current_tag;
458 GTokenType token = g_scanner_get_next_token(scanner);
459 GTokenValue value = g_scanner_cur_value(scanner);
462 token != G_TOKEN_IDENTIFIER ||
463 ( strcmp(value.v_identifier, "buffer") && strcmp(value.v_identifier, "grid") )
465 g_scanner_error(scanner, "CSS Error: buffer/grid expected");
469 field = g_strdup(value.v_identifier);
471 /* Parse the tag name to change */
472 if( g_scanner_peek_next_token(scanner) == '{') {
473 style_accept(scanner, '{');
474 if( !strcmp(field, "buffer") )
475 current_tag = g_hash_table_lookup(priv->styles->text_buffer, "default");
477 current_tag = g_hash_table_lookup(priv->styles->text_grid, "default");
479 if( !style_accept(scanner, '.') )
482 token = g_scanner_get_next_token(scanner);
483 value = g_scanner_cur_value(scanner);
485 if(token != G_TOKEN_IDENTIFIER) {
486 g_scanner_error(scanner, "CSS Error: style selector expected");
490 if( !strcmp(field, "buffer") )
491 current_tag = g_hash_table_lookup(priv->styles->text_buffer, value.v_identifier);
493 current_tag = g_hash_table_lookup(priv->styles->text_grid, value.v_identifier);
495 if(current_tag == NULL) {
496 g_scanner_error(scanner, "CSS Error: invalid style identifier");
500 if( !style_accept(scanner, '{') )
504 while( g_scanner_peek_next_token(scanner) != '}') {
505 if( !style_accept_style_hint(scanner, current_tag) )
509 if( !style_accept(scanner, '}') )
515 /* Internal function: parses a style hint */
517 style_accept_style_hint(GScanner *scanner, GtkTextTag *current_tag)
519 GTokenType token = g_scanner_get_next_token(scanner);
520 GTokenValue value = g_scanner_cur_value(scanner);
523 if(token != G_TOKEN_IDENTIFIER) {
524 g_scanner_error(scanner, "CSS Error: style hint expected");
528 hint = g_strdup(value.v_identifier);
530 if( !style_accept(scanner, ':') )
533 token = g_scanner_get_next_token(scanner);
534 value = g_scanner_cur_value(scanner);
536 if( !strcmp(hint, "font-family") ) {
537 if(token != G_TOKEN_STRING) {
538 g_scanner_error(scanner, "CSS Error: string expected");
541 g_object_set(current_tag, "family", value.v_string, "family-set", TRUE, NULL);
543 else if( !strcmp(hint, "font-weight") ) {
544 if(token != G_TOKEN_IDENTIFIER) {
545 g_scanner_error(scanner, "CSS Error: bold/normal expected");
549 if( !strcmp(value.v_identifier, "bold") )
550 g_object_set(current_tag, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL);
551 else if( !strcmp(value.v_identifier, "normal") )
552 g_object_set(current_tag, "weight", PANGO_WEIGHT_NORMAL, "weight-set", TRUE, NULL);
554 g_scanner_error(scanner, "CSS Error: bold/normal expected");
558 else if( !strcmp(hint, "font-style") ) {
559 if(token != G_TOKEN_IDENTIFIER) {
560 g_scanner_error(scanner, "CSS Error: italic/normal expected");
564 if( !strcmp(value.v_identifier, "italic") )
565 g_object_set(current_tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
566 else if( !strcmp(value.v_identifier, "normal") )
567 g_object_set(current_tag, "style", PANGO_STYLE_NORMAL, "style-set", TRUE, NULL);
569 g_scanner_error(scanner, "CSS Error: italic/normal expected");
573 else if( !strcmp(hint, "font-size") ) {
574 if(token == G_TOKEN_INT)
575 g_object_set(current_tag, "size-points", (float)value.v_int, "size-set", TRUE, NULL);
576 else if(token == G_TOKEN_FLOAT)
577 g_object_set(current_tag, "size-points", value.v_float, "size-set", TRUE, NULL);
579 g_scanner_error(scanner, "CSS Error: integer or float expected");
583 else if( !strcmp(hint, "color") ) {
584 if(token != G_TOKEN_IDENTIFIER) {
585 g_scanner_error(scanner, "CSS Error: hex color expected");
589 g_object_set(current_tag, "foreground", value.v_identifier, "foreground-set", TRUE, NULL);
591 else if( !strcmp(hint, "background-color") ) {
592 if(token != G_TOKEN_IDENTIFIER) {
593 g_scanner_error(scanner, "CSS Error: hex color expected");
596 g_object_set(current_tag, "background", value.v_identifier, "background-set", TRUE, NULL);
598 else if( !strcmp(hint, "text-align") ) {
599 if(token != G_TOKEN_IDENTIFIER) {
600 g_scanner_error(scanner, "CSS Error: left/right/center expected");
604 if( !strcmp(value.v_identifier, "left") )
605 g_object_set(current_tag, "justification", GTK_JUSTIFY_LEFT, "justification-set", TRUE, NULL);
606 else if( !strcmp(value.v_identifier, "right") )
607 g_object_set(current_tag, "justification", GTK_JUSTIFY_RIGHT, "justification-set", TRUE, NULL);
608 else if( !strcmp(value.v_identifier, "center") )
609 g_object_set(current_tag, "justification", GTK_JUSTIFY_CENTER, "justification-set", TRUE, NULL);
611 g_scanner_error(scanner, "CSS Error: left/right/center expected");
615 else if( !strcmp(hint, "margin-left") ) {
616 if(token != G_TOKEN_INT) {
617 g_scanner_error(scanner, "CSS Error: integer expected");
620 g_object_set(current_tag, "left-margin", value.v_int, "left-margin-set", TRUE, NULL);
622 else if( !strcmp(hint, "margin-right") ) {
623 if(token != G_TOKEN_INT) {
624 g_scanner_error(scanner, "CSS Error: integer expected");
627 g_object_set(current_tag, "right-margin", value.v_int, "right-margin-set", TRUE, NULL);
629 else if( !strcmp(hint, "margin-top") ) {
630 if(token != G_TOKEN_INT) {
631 g_scanner_error(scanner, "CSS Error: integer expected");
634 g_object_set(current_tag, "pixels-above-lines", value.v_int, "pixels-above-lines-set", TRUE, NULL);
636 else if( !strcmp(hint, "margin-bottom") ) {
637 if(token != G_TOKEN_INT) {
638 g_scanner_error(scanner, "CSS Error: integer expected");
641 g_object_set(current_tag, "pixels-below-lines", value.v_int, "pixels-below-lines-set", TRUE, NULL);
645 g_scanner_error(scanner, "CSS Error: invalid style hint %s", hint);
649 if( !style_accept(scanner, ';') )
655 /* Internal function: parses a glk color to a #hex-value */
657 glkcolor_to_hex(glui32 val, gchar *buffer)
659 g_return_if_fail(buffer != NULL);
661 sprintf(buffer, "#%02X%02X%02X",
662 ((val & 0xff0000) >> 16),
663 ((val & 0x00ff00) >> 8),
668 /* Internal function: parses a glk color to a GdkColor */
670 glkcolor_to_gdkcolor(glui32 val, GdkColor *color)
672 color->red = 256 * ((val & 0xff0000) >> 16);
673 color->green = 256 * ((val & 0x00ff00) >> 8);
674 color->blue = 256 * (val & 0x0000ff);
677 /* Internal function: parses a GdkColor to a glk color */
679 gdkcolor_to_glkcolor(GdkColor *color)
681 g_return_val_if_fail(color != NULL, 0);
682 return (glui32) color->pixel;
685 /* Internal function: changes a GTK tag to correspond with the given style. */
687 apply_stylehint_to_tag(GtkTextTag *tag, GtkTextTag *default_tag, glui32 wintype, glui32 hint, glsi32 val)
689 g_return_if_fail(tag != NULL);
691 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
692 GObject *tag_object = G_OBJECT(tag);
694 gint reverse_color = GPOINTER_TO_INT( g_object_get_data(tag_object, "reverse-color") );
699 case stylehint_Indentation:
700 g_object_set(tag_object, "left-margin", 5*val, "left-margin-set", TRUE, NULL);
701 g_object_set(tag_object, "right-margin", 5*val, "right-margin-set", TRUE, NULL);
704 case stylehint_ParaIndentation:
705 g_object_set(tag_object, "indent", 5*val, "indent-set", TRUE, NULL);
708 case stylehint_Justification:
710 case stylehint_just_LeftFlush: i = GTK_JUSTIFY_LEFT; break;
711 case stylehint_just_LeftRight: i = GTK_JUSTIFY_FILL; break;
712 case stylehint_just_Centered: i = GTK_JUSTIFY_CENTER; break;
713 case stylehint_just_RightFlush: i = GTK_JUSTIFY_RIGHT; break;
715 WARNING("Unknown justification");
716 i = GTK_JUSTIFY_LEFT;
718 g_object_set(tag_object, "justification", i, "justification-set", TRUE, NULL);
721 case stylehint_Weight:
723 case -1: i = PANGO_WEIGHT_LIGHT; break;
724 case 0: i = PANGO_WEIGHT_NORMAL; break;
725 case 1: i = PANGO_WEIGHT_BOLD; break;
726 default: WARNING("Unknown font weight");
728 g_object_set(tag_object, "weight", i, "weight-set", TRUE, NULL);
732 g_object_set(tag_object, "size", 14+(2*val), "size-set", TRUE, NULL);
735 case stylehint_Oblique:
736 g_object_set(tag_object, "style", val ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL, "style-set", TRUE, NULL);
739 case stylehint_Proportional:
742 GtkTextTag *font_tag = g_hash_table_lookup(
743 wintype == wintype_TextBuffer? glk_data->styles->text_buffer : glk_data->styles->text_grid,
744 val? "normal" : "preformatted");
745 g_object_get(font_tag, "family", &font_family, NULL);
746 g_object_set(tag_object, "family", font_family, "family-set", TRUE, NULL);
751 case stylehint_TextColor:
752 glkcolor_to_hex(val, color);
755 g_object_set(tag_object, "foreground", color, "foreground-set", TRUE, NULL);
757 g_object_set(tag_object, "background", color, "background-set", TRUE, NULL);
761 case stylehint_BackColor:
762 glkcolor_to_hex(val, color);
765 g_object_set(tag_object, "background", color, "background-set", TRUE, NULL);
767 g_object_set(tag_object, "foreground", color, "background-set", TRUE, NULL);
771 case stylehint_ReverseColor:
772 if(reverse_color != val) {
773 /* Flip the fore- and background colors */
774 GdkColor* foreground_color;
775 GdkColor* background_color;
776 gint f_set, b_set, df_set, db_set = 0;
777 g_object_get(tag_object, "foreground-set", &f_set, "background-set", &b_set, NULL);
778 g_object_get(default_tag, "foreground-set", &df_set, "background-set", &db_set, NULL);
781 g_object_get(tag_object, "foreground-gdk", &foreground_color, NULL);
783 g_object_get(default_tag, "foreground-gdk", &foreground_color, NULL);
785 g_object_get(tag_object, "background-gdk", &background_color, NULL);
787 g_object_get(default_tag, "background-gdk", &background_color, NULL);
790 g_object_set(tag_object, "foreground-gdk", background_color, NULL);
792 g_object_set(tag_object, "foreground", "#ffffff", NULL);
795 g_object_set(tag_object, "background-gdk", foreground_color, NULL);
797 g_object_set(tag_object, "background", "#000000", NULL);
799 g_object_set_data( tag_object, "reverse-color", GINT_TO_POINTER(val != 0) );
804 WARNING("Unknown style hint");
808 /* Internal function: queries a text tag for the value of a given style hint */
810 query_tag(GtkTextTag *tag, glui32 wintype, glui32 hint)
815 g_return_val_if_fail(tag != NULL, 0);
817 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
820 case stylehint_Indentation:
821 g_object_get(tag, "left_margin", &intval, NULL);
824 case stylehint_ParaIndentation:
825 g_object_get(tag, "indent", &intval, NULL);
828 case stylehint_Justification:
829 g_object_get(tag, "justification", &intval, NULL);
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;
836 WARNING("Unknown justification");
837 return stylehint_just_LeftFlush;
840 case stylehint_Weight:
841 g_object_get(tag, "weight", &intval, NULL);
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;
850 g_object_get(tag, "size", &intval, NULL);
851 return (intval/2)-14;
853 case stylehint_Oblique:
854 g_object_get(tag, "style", &intval , NULL);
855 return intval == PANGO_STYLE_ITALIC ? 1 : 0;
857 case stylehint_Proportional:
858 /* Use pango_font_family_is_monospace()? */
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,
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;
868 g_free(query_font_family);
872 case stylehint_TextColor:
873 g_object_get(tag, "foreground-gdk", &colval, NULL);
874 return gdkcolor_to_glkcolor(colval);
876 case stylehint_BackColor:
877 g_object_get(tag, "background-gdk", &colval, NULL);
878 return gdkcolor_to_glkcolor(colval);
880 case stylehint_ReverseColor:
881 return GPOINTER_TO_INT( g_object_get_data(G_OBJECT(tag), "reverse_color") );
884 WARNING("Unknown style hint");
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.
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.
901 * There is no equivalent constant to set a hint for all styles of a single
906 glk_stylehint_set(glui32 wintype, glui32 styl, glui32 hint, glsi32 val)
908 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
910 GtkTextTag *to_change, *default_tag;
911 if(wintype == wintype_TextBuffer || wintype == wintype_AllTypes) {
912 to_change = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) );
913 default_tag = g_hash_table_lookup( glk_data->styles->text_buffer, get_tag_name(styl) );
914 apply_stylehint_to_tag(to_change, default_tag, wintype_TextBuffer, hint, val);
917 if(wintype == wintype_TextGrid || wintype == wintype_AllTypes) {
918 to_change = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) );
919 default_tag = g_hash_table_lookup( glk_data->styles->text_grid, get_tag_name(styl) );
920 apply_stylehint_to_tag(to_change, default_tag, wintype_TextGrid, hint, val);
925 * glk_stylehint_clear:
926 * @wintype: The window type to set a style hint on, or %wintype_AllTypes.
927 * @styl: The style to set a hint for.
928 * @hint: The type of style hint, one of the <code>stylehint_</code> constants.
930 * Clears a hint about the appearance of one style for a particular type of
931 * window to its default value. You can also set @wintype to %wintype_AllTypes,
932 * which clears a hint for all types of window.
934 * There is no equivalent constant to reset a hint for all styles of a single
939 glk_stylehint_clear(glui32 wintype, glui32 styl, glui32 hint)
941 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
945 case wintype_TextBuffer:
946 tag = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) );
948 glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) );
951 case wintype_TextGrid:
952 tag = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) );
954 glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) );
962 * glk_style_distinguish:
963 * @win: The window in which the styles are to be distinguished.
964 * @styl1: The first style to be distinguished from the second style.
965 * @styl2: The second style to be distinguished from the first style.
967 * Decides whether two styles are visually distinguishable in the given window.
968 * The exact meaning of this is left for the library to determine.
969 * <note><title>Chimara</title><para>
970 * Currently, all styles of one window are assumed to be mutually
974 * Returns: %TRUE (1) if the two styles are visually distinguishable. If they
975 * are not, it returns %FALSE (0).
978 glk_style_distinguish(winid_t win, glui32 styl1, glui32 styl2)
981 return styl1 != styl2;
986 * @win: The window from which to take the style.
987 * @styl: The style to perform the measurement on.
988 * @hint: The stylehint to measure.
989 * @result: Address to write the result to.
991 * Tries to test an attribute of one style in the given window @win. The library
992 * may not be able to determine the attribute; if not, this returns %FALSE (0).
993 * If it can, it returns %TRUE (1) and stores the value in the location pointed
996 * As usual, it is legal for @result to be %NULL, although fairly pointless.
999 * The meaning of the value depends on the hint which was tested:
1002 * <term>%stylehint_Indentation, %stylehint_ParaIndentation</term>
1003 * <listitem><para>The indentation and paragraph indentation. These are in a
1004 * metric which is platform-dependent.</para>
1005 * <note><para>Most likely either characters or pixels.</para></note>
1009 * <term>%stylehint_Justification</term>
1010 * <listitem><para>One of the constants %stylehint_just_LeftFlush,
1011 * %stylehint_just_LeftRight, %stylehint_just_Centered, or
1012 * %stylehint_just_RightFlush.</para></listitem>
1015 * <term>%stylehint_Size</term>
1016 * <listitem><para>The font size. Again, this is in a platform-dependent
1018 * <note><para>Pixels, points, or simply 1 if the library does not support
1019 * varying font sizes.</para></note>
1023 * <term>%stylehint_Weight</term>
1024 * <listitem><para>1 for heavy-weight fonts (boldface), 0 for normal weight,
1025 * and -1 for light-weight fonts.</para></listitem>
1028 * <term>%stylehint_Oblique</term>
1029 * <listitem><para>1 for oblique fonts (italic), or 0 for normal angle.</para>
1033 * <term>%stylehint_Proportional</term>
1034 * <listitem><para>1 for proportional-width fonts, or 0 for fixed-width.
1035 * </para></listitem>
1038 * <term>%stylehint_TextColor, %stylehint_BackColor</term>
1039 * <listitem><para>These are values from 0x00000000 to 0x00FFFFFF, encoded as
1040 * described in <link
1041 * linkend="chimara-Suggesting-the-Appearance-of-Styles">Suggesting the
1042 * Appearance of Styles</link>.</para></listitem>
1045 * <term>%stylehint_ReverseColor</term>
1046 * <listitem><para>0 for normal printing, 1 if the foreground and background
1047 * colors are reversed.</para></listitem>
1051 * Returns: TRUE upon successul retrieval, otherwise FALSE.
1054 glk_style_measure(winid_t win, glui32 styl, glui32 hint, glui32 *result)
1056 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
1060 case wintype_TextBuffer:
1061 tag = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) );
1063 *result = query_tag(tag, win->type, hint);
1065 case wintype_TextGrid:
1066 tag = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) );
1068 *result = query_tag(tag, win->type, hint);
1076 /* Internal function returning the current default font for a window type
1077 * This can be used later for size calculations. Only wintype_TextGrid and wintype_TextBuffer are
1078 * supported for now */
1079 PangoFontDescription *
1080 get_current_font(guint32 wintype)
1082 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
1086 case wintype_TextGrid:
1087 normal = g_hash_table_lookup(glk_data->styles->text_grid, "normal");
1089 case wintype_TextBuffer:
1090 normal = g_hash_table_lookup(glk_data->styles->text_buffer, "normal");
1096 PangoFontDescription *font;
1097 g_object_get( G_OBJECT(normal), "font-desc", &font, NULL );
1102 /* Internal function copying the attributes of a text tag to a pango attribute list */
1104 text_tag_to_attr_list(GtkTextTag *tag, PangoAttrList *list)
1107 GdkColor *foreground, *background;
1109 PangoFontDescription *font_desc;
1110 gboolean strikethrough;
1111 PangoUnderline underline;
1113 g_object_get(tag, "foreground-set", &set, "foreground-gdk", &foreground, NULL);
1115 pango_attr_list_insert(
1117 pango_attr_foreground_new(foreground->red, foreground->green, foreground->blue)
1120 g_object_get(tag, "background-set", &set, "background-gdk", &background, NULL);
1122 pango_attr_list_insert(
1124 pango_attr_background_new(background->red, background->green, background->blue)
1127 g_object_get(tag, "language-set", &set, "language", &string, NULL);
1129 pango_attr_list_insert(
1131 pango_attr_language_new( pango_language_from_string(string) )
1135 /* Font description updates the following properties simultaniously:
1136 * family, style, weight, variant, stretch, size
1138 g_object_get(tag, "font-desc", &font_desc, NULL);
1139 pango_attr_list_insert(
1141 pango_attr_font_desc_new(font_desc)
1144 g_object_get(tag, "strikethrough-set", &set, "strikethrough", &strikethrough, NULL);
1146 pango_attr_list_insert(
1148 pango_attr_strikethrough_new(strikethrough)
1151 g_object_get(tag, "underline-set", &set, "underline", &underline, NULL);
1153 pango_attr_list_insert(
1155 pango_attr_underline_new(underline)
1160 /* Update pager and reverse video tags */
1162 style_update(ChimaraGlk *glk)
1164 CHIMARA_GLK_USE_PRIVATE(glk, priv);
1166 GtkTextTag *pager_tag = GTK_TEXT_TAG( g_hash_table_lookup(priv->styles->text_buffer, "pager") );
1167 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);