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_table_copy(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[] = {
55 /* Internal function: mapping from style enum to tag name */
57 get_tag_name(glui32 style)
59 if(style >= style_NUMSTYLES) {
60 WARNING("Unsupported style");
63 return (gchar*) TAG_NAMES[style];
68 * glk_set_style_stream:
69 * @str: Output stream to change the style of
70 * @styl: The style to apply
72 * This changes the style of the stream @str. See glk_set_style().
75 glk_set_style_stream(strid_t str, glui32 styl) {
76 if(str->window == NULL)
79 flush_window_buffer(str->window);
80 str->style = get_tag_name(styl);
83 /* Internal function: call this to initialize the layout of the 'more' prompt. */
85 style_init_more_prompt(winid_t win)
87 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
89 win->pager_layout = gtk_widget_create_pango_layout(win->widget, "More");
90 pango_layout_set_attributes(win->pager_layout, glk_data->pager_attr_list);
93 /* Internal function: call this to initialize the default styles to a textbuffer. */
95 style_init_textbuffer(GtkTextBuffer *buffer)
97 g_return_if_fail(buffer != NULL);
99 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
101 /* Copy the current text tags to the textbuffer's tag table */
102 g_hash_table_foreach(glk_data->current_styles->text_buffer, style_add_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
106 /* Internal function: call this to initialize the default styles to a textgrid. */
108 style_init_textgrid(GtkTextBuffer *buffer)
110 g_return_if_fail(buffer != NULL);
112 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
114 /* Copy the current text tags to the textgrid's tag table */
115 g_hash_table_foreach(glk_data->current_styles->text_grid, style_add_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
118 /* Internal function used to iterate over the default text tag table, applying them to a textbuffer */
120 style_add_tag_to_textbuffer(gpointer key, gpointer tag, gpointer tag_table)
122 gtk_text_tag_table_add( tag_table, gtk_text_tag_copy(tag) );
125 /* Internal function used to iterate over a style table, copying it */
127 style_table_copy(gpointer key, gpointer tag, gpointer target_table)
129 g_return_if_fail(key != NULL);
130 g_return_if_fail(tag != NULL);
131 g_return_if_fail(target_table != NULL);
133 g_hash_table_insert(target_table, key, gtk_text_tag_copy( GTK_TEXT_TAG(tag) ));
136 /* Internal function that copies a text tag */
138 gtk_text_tag_copy(GtkTextTag *tag)
142 g_return_val_if_fail(tag != NULL, NULL);
144 copy = gtk_text_tag_new(tag->name);
145 gtk_text_attributes_copy_values(tag->values, copy->values);
147 #define _COPY_FLAG(flag) copy->flag = tag->flag
148 _COPY_FLAG (bg_color_set);
149 _COPY_FLAG (bg_color_set);
150 _COPY_FLAG (bg_stipple_set);
151 _COPY_FLAG (fg_color_set);
152 _COPY_FLAG (fg_stipple_set);
153 _COPY_FLAG (justification_set);
154 _COPY_FLAG (left_margin_set);
155 _COPY_FLAG (indent_set);
156 _COPY_FLAG (rise_set);
157 _COPY_FLAG (strikethrough_set);
158 _COPY_FLAG (right_margin_set);
159 _COPY_FLAG (pixels_above_lines_set);
160 _COPY_FLAG (pixels_below_lines_set);
161 _COPY_FLAG (pixels_inside_wrap_set);
162 _COPY_FLAG (tabs_set);
163 _COPY_FLAG (underline_set);
164 _COPY_FLAG (wrap_mode_set);
165 _COPY_FLAG (bg_full_height_set);
166 _COPY_FLAG (invisible_set);
167 _COPY_FLAG (editable_set);
168 _COPY_FLAG (language_set);
171 /* Copy the data that was added manually */
172 gpointer reverse_color = g_object_get_data( G_OBJECT(tag), "reverse_color" );
175 g_object_set_data( G_OBJECT(copy), "reverse_color", reverse_color );
180 /* Internal function that reads the default styles from a CSS file */
182 style_init(ChimaraGlk *glk)
184 CHIMARA_GLK_USE_PRIVATE(glk, priv);
186 GHashTable *default_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
187 GHashTable *default_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
188 GHashTable *current_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
189 GHashTable *current_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
192 PangoFontDescription *default_font_desc = pango_font_description_from_string("Serif");
193 PangoFontDescription *monospace_font_desc = pango_font_description_from_string("Monospace");
195 /* Initialise the default styles for a text grid */
196 tag = gtk_text_tag_new("normal");
197 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
198 g_hash_table_insert(default_text_grid_styles, "normal", tag);
200 tag = gtk_text_tag_new("emphasized");
201 g_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
202 g_hash_table_insert(default_text_grid_styles, "emphasized", tag);
204 tag = gtk_text_tag_new("preformatted");
205 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
206 g_hash_table_insert(default_text_grid_styles, "preformatted", tag);
208 tag = gtk_text_tag_new("header");
209 g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, NULL);
210 g_hash_table_insert(default_text_grid_styles, "header", tag);
212 tag = gtk_text_tag_new("subheader");
213 g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, NULL);
214 g_hash_table_insert(default_text_grid_styles, "subheader", tag);
216 tag = gtk_text_tag_new("alert");
217 g_object_set(tag, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
218 g_hash_table_insert(default_text_grid_styles, "alert", tag);
220 tag = gtk_text_tag_new("note");
221 g_object_set(tag, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
222 g_hash_table_insert(default_text_grid_styles, "note", tag);
224 tag = gtk_text_tag_new("block-quote");
225 g_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
226 g_hash_table_insert(default_text_grid_styles, "block-quote", tag);
228 g_hash_table_insert(default_text_grid_styles, "input", gtk_text_tag_new("input"));
229 g_hash_table_insert(default_text_grid_styles, "user1", gtk_text_tag_new("user1"));
230 g_hash_table_insert(default_text_grid_styles, "user2", gtk_text_tag_new("user2"));
232 tag = gtk_text_tag_new("hyperlink");
233 g_object_set(tag, "foreground", "#0000ff", "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
234 g_hash_table_insert(default_text_grid_styles, "hyperlink", tag);
236 /* Tags for the textbuffer */
237 tag = gtk_text_tag_new("normal");
238 g_object_set(tag, "font-desc", default_font_desc, NULL);
239 g_hash_table_insert(default_text_buffer_styles, "normal", tag);
241 tag = gtk_text_tag_new("emphasized");
242 g_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
243 g_hash_table_insert(default_text_buffer_styles, "emphasized", tag);
245 tag = gtk_text_tag_new("preformatted");
246 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
247 g_hash_table_insert(default_text_buffer_styles, "preformatted", tag);
249 tag = gtk_text_tag_new("header");
250 g_object_set(tag, "size-points", 18.0, "weight", PANGO_WEIGHT_BOLD, NULL);
251 g_hash_table_insert(default_text_buffer_styles, "header", tag);
253 tag = gtk_text_tag_new("subheader");
254 g_object_set(tag, "size-points", 14.0, "weight", PANGO_WEIGHT_BOLD, NULL);
255 g_hash_table_insert(default_text_buffer_styles, "subheader", tag);
257 tag = gtk_text_tag_new("alert");
258 g_object_set(tag, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
259 g_hash_table_insert(default_text_buffer_styles, "alert", tag);
261 tag = gtk_text_tag_new("note");
262 g_object_set(tag, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
263 g_hash_table_insert(default_text_buffer_styles, "note", tag);
265 tag = gtk_text_tag_new("block-quote");
266 g_object_set(tag, "justification", GTK_JUSTIFY_CENTER, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
267 g_hash_table_insert(default_text_buffer_styles, "block-quote", tag);
269 g_hash_table_insert(default_text_buffer_styles, "input", gtk_text_tag_new("input"));
270 g_hash_table_insert(default_text_buffer_styles, "user1", gtk_text_tag_new("user1"));
271 g_hash_table_insert(default_text_buffer_styles, "user2", gtk_text_tag_new("user2"));
273 tag = gtk_text_tag_new("hyperlink");
274 g_object_set(tag, "foreground", "#0000ff", "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
275 g_hash_table_insert(default_text_buffer_styles, "hyperlink", tag);
277 GtkTextTag *pager_tag = gtk_text_tag_new("pager");
278 g_object_set(pager_tag, "foreground", "#ffffff", "background", "#000000", NULL);
279 g_hash_table_insert(default_text_buffer_styles, "pager", pager_tag);
281 pango_font_description_free(default_font_desc);
282 pango_font_description_free(monospace_font_desc);
284 priv->default_styles->text_grid = default_text_grid_styles;
285 priv->default_styles->text_buffer = default_text_buffer_styles;
286 priv->current_styles->text_grid = current_text_grid_styles;
287 priv->current_styles->text_buffer = current_text_buffer_styles;
289 /* Set the current style to a copy of the default style */
290 copy_default_styles_to_current_styles(glk);
292 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);
295 /* Reset style tables to the library's internal defaults */
297 reset_default_styles(ChimaraGlk *glk)
299 /* TODO: write this function */
302 /* Copy the default styles to the current styles
303 FIXME: This function is temporary and will not be needed later on */
305 copy_default_styles_to_current_styles(ChimaraGlk *glk)
307 CHIMARA_GLK_USE_PRIVATE(glk, priv);
308 g_hash_table_foreach(priv->default_styles->text_grid, style_table_copy, priv->current_styles->text_grid);
309 g_hash_table_foreach(priv->default_styles->text_buffer, style_table_copy, priv->current_styles->text_buffer);
312 /* Create the CSS file scanner */
314 create_css_file_scanner(void)
316 GScanner *scanner = g_scanner_new(NULL);
317 scanner->config->cset_identifier_first = G_CSET_a_2_z G_CSET_A_2_Z "#";
318 scanner->config->cset_identifier_nth = G_CSET_a_2_z G_CSET_A_2_Z "-_" G_CSET_DIGITS;
319 scanner->config->symbol_2_token = TRUE;
320 scanner->config->cpair_comment_single = NULL;
321 scanner->config->scan_float = FALSE;
325 /* Run the scanner over the CSS file, overriding the default styles */
327 scan_css_file(GScanner *scanner, ChimaraGlk *glk)
329 while( g_scanner_peek_next_token(scanner) != G_TOKEN_EOF) {
330 if( !style_accept_style_selector(scanner, glk) )
334 g_scanner_destroy(scanner);
337 /* Internal function: parses a token */
339 style_accept(GScanner *scanner, GTokenType token)
341 GTokenType next = g_scanner_get_next_token(scanner);
343 g_scanner_unexp_token(scanner, token, NULL, NULL, NULL, "CSS Error", 1);
349 /* Internal function: parses a style selector */
351 style_accept_style_selector(GScanner *scanner, ChimaraGlk *glk)
353 CHIMARA_GLK_USE_PRIVATE(glk, priv);
355 GtkTextTag *current_tag;
357 GTokenType token = g_scanner_get_next_token(scanner);
358 GTokenValue value = g_scanner_cur_value(scanner);
361 token != G_TOKEN_IDENTIFIER ||
362 ( strcmp(value.v_identifier, "buffer") && strcmp(value.v_identifier, "grid") )
364 g_scanner_error(scanner, "CSS Error: buffer/grid expected");
368 field = g_strdup(value.v_identifier);
370 if( !style_accept(scanner, '.') )
373 token = g_scanner_get_next_token(scanner);
374 value = g_scanner_cur_value(scanner);
376 if(token != G_TOKEN_IDENTIFIER) {
377 g_scanner_error(scanner, "CSS Error: style selector expected");
381 if( !strcmp(field, "buffer") )
382 current_tag = g_hash_table_lookup(priv->default_styles->text_buffer, value.v_identifier);
384 current_tag = g_hash_table_lookup(priv->default_styles->text_grid, value.v_identifier);
386 if(current_tag == NULL) {
387 g_scanner_error(scanner, "CSS Error: invalid style identifier");
391 if( !style_accept(scanner, '{') )
394 while( g_scanner_peek_next_token(scanner) != '}') {
395 if( !style_accept_style_hint(scanner, current_tag) )
399 if( !style_accept(scanner, '}') )
405 /* Internal function: parses a style hint */
407 style_accept_style_hint(GScanner *scanner, GtkTextTag *current_tag)
409 GTokenType token = g_scanner_get_next_token(scanner);
410 GTokenValue value = g_scanner_cur_value(scanner);
413 if(token != G_TOKEN_IDENTIFIER) {
414 g_scanner_error(scanner, "CSS Error: style hint expected");
418 hint = g_strdup(value.v_identifier);
420 if( !style_accept(scanner, ':') )
423 token = g_scanner_get_next_token(scanner);
424 value = g_scanner_cur_value(scanner);
426 if( !strcmp(hint, "font-family") ) {
427 if(token != G_TOKEN_STRING) {
428 g_scanner_error(scanner, "CSS Error: string expected");
431 g_object_set(current_tag, "family", value.v_string, "family-set", TRUE, NULL);
433 else if( !strcmp(hint, "font-weight") ) {
434 if(token != G_TOKEN_IDENTIFIER) {
435 g_scanner_error(scanner, "CSS Error: bold/normal expected");
439 if( !strcmp(value.v_identifier, "bold") )
440 g_object_set(current_tag, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL);
441 else if( !strcmp(value.v_identifier, "normal") )
442 g_object_set(current_tag, "weight", PANGO_WEIGHT_NORMAL, "weight-set", TRUE, NULL);
444 g_scanner_error(scanner, "CSS Error: bold/normal expected");
448 else if( !strcmp(hint, "font-style") ) {
449 if(token != G_TOKEN_IDENTIFIER) {
450 g_scanner_error(scanner, "CSS Error: italic/normal expected");
454 if( !strcmp(value.v_identifier, "italic") )
455 g_object_set(current_tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
456 else if( !strcmp(value.v_identifier, "normal") )
457 g_object_set(current_tag, "style", PANGO_STYLE_NORMAL, "style-set", TRUE, NULL);
459 g_scanner_error(scanner, "CSS Error: italic/normal expected");
463 else if( !strcmp(hint, "font-size") ) {
464 if(token == G_TOKEN_INT)
465 g_object_set(current_tag, "size-points", (float)value.v_int, "size-set", TRUE, NULL);
466 else if(token == G_TOKEN_FLOAT)
467 g_object_set(current_tag, "size-points", value.v_float, "size-set", TRUE, NULL);
469 g_scanner_error(scanner, "CSS Error: integer or float expected");
473 else if( !strcmp(hint, "color") ) {
474 if(token != G_TOKEN_IDENTIFIER) {
475 g_scanner_error(scanner, "CSS Error: hex color expected");
479 g_object_set(current_tag, "foreground", value.v_identifier, "foreground-set", TRUE, NULL);
481 else if( !strcmp(hint, "background-color") ) {
482 if(token != G_TOKEN_IDENTIFIER) {
483 g_scanner_error(scanner, "CSS Error: hex color expected");
486 g_object_set(current_tag, "background", value.v_identifier, "background-set", TRUE, NULL);
488 else if( !strcmp(hint, "text-align") ) {
489 if(token != G_TOKEN_IDENTIFIER) {
490 g_scanner_error(scanner, "CSS Error: left/right/center expected");
494 if( !strcmp(value.v_identifier, "left") )
495 g_object_set(current_tag, "justification", GTK_JUSTIFY_LEFT, "justification-set", TRUE, NULL);
496 else if( !strcmp(value.v_identifier, "right") )
497 g_object_set(current_tag, "justification", GTK_JUSTIFY_RIGHT, "justification-set", TRUE, NULL);
498 else if( !strcmp(value.v_identifier, "center") )
499 g_object_set(current_tag, "justification", GTK_JUSTIFY_CENTER, "justification-set", TRUE, NULL);
501 g_scanner_error(scanner, "CSS Error: left/right/center expected");
505 else if( !strcmp(hint, "margin-left") ) {
506 if(token != G_TOKEN_INT) {
507 g_scanner_error(scanner, "CSS Error: integer expected");
510 g_object_set(current_tag, "left-margin", value.v_int, "left-margin-set", TRUE, NULL);
512 else if( !strcmp(hint, "margin-right") ) {
513 if(token != G_TOKEN_INT) {
514 g_scanner_error(scanner, "CSS Error: integer expected");
517 g_object_set(current_tag, "right-margin", value.v_int, "right-margin-set", TRUE, NULL);
519 else if( !strcmp(hint, "margin-top") ) {
520 if(token != G_TOKEN_INT) {
521 g_scanner_error(scanner, "CSS Error: integer expected");
524 g_object_set(current_tag, "pixels-above-lines", value.v_int, "pixels-above-lines-set", TRUE, NULL);
526 else if( !strcmp(hint, "margin-bottom") ) {
527 if(token != G_TOKEN_INT) {
528 g_scanner_error(scanner, "CSS Error: integer expected");
531 g_object_set(current_tag, "pixels-below-lines", value.v_int, "pixels-below-lines-set", TRUE, NULL);
535 g_scanner_error(scanner, "CSS Error: invalid style hint %s", hint);
539 if( !style_accept(scanner, ';') )
545 /* Internal function: parses a glk color to a #hex-value */
547 glkcolor_to_hex(glui32 val, gchar *buffer)
549 g_return_if_fail(buffer != NULL);
551 sprintf(buffer, "#%02X%02X%02X",
552 ((val & 0xff0000) >> 16),
553 ((val & 0x00ff00) >> 8),
558 /* Internal function: parses a glk color to a GdkColor */
560 glkcolor_to_gdkcolor(glui32 val, GdkColor *color)
562 color->red = 256 * ((val & 0xff0000) >> 16);
563 color->green = 256 * ((val & 0x00ff00) >> 8);
564 color->blue = 256 * (val & 0x0000ff);
567 /* Internal function: parses a GdkColor to a glk color */
569 gdkcolor_to_glkcolor(GdkColor *color)
571 g_return_val_if_fail(color != NULL, 0);
572 return (glui32) color->pixel;
575 /* Internal function: changes a GTK tag to correspond with the given style. */
577 apply_stylehint_to_tag(GtkTextTag *tag, glui32 wintype, glui32 hint, glsi32 val)
579 g_return_if_fail(tag != NULL);
581 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
582 GObject *tag_object = G_OBJECT(tag);
584 gint reverse_color = GPOINTER_TO_INT( g_object_get_data(tag_object, "reverse-color") );
589 case stylehint_Indentation:
590 g_object_set(tag_object, "left-margin", 5*val, "left-margin-set", TRUE, NULL);
591 g_object_set(tag_object, "right-margin", 5*val, "right-margin-set", TRUE, NULL);
594 case stylehint_ParaIndentation:
595 g_object_set(tag_object, "indent", 5*val, "indent-set", TRUE, NULL);
598 case stylehint_Justification:
600 case stylehint_just_LeftFlush: i = GTK_JUSTIFY_LEFT; break;
601 case stylehint_just_LeftRight: i = GTK_JUSTIFY_FILL; break;
602 case stylehint_just_Centered: i = GTK_JUSTIFY_CENTER; break;
603 case stylehint_just_RightFlush: i = GTK_JUSTIFY_RIGHT; break;
605 WARNING("Unknown justification");
606 i = GTK_JUSTIFY_LEFT;
608 g_object_set(tag_object, "justification", i, "justification-set", TRUE, NULL);
611 case stylehint_Weight:
613 case -1: i = PANGO_WEIGHT_LIGHT; break;
614 case 0: i = PANGO_WEIGHT_NORMAL; break;
615 case 1: i = PANGO_WEIGHT_BOLD; break;
616 default: WARNING("Unknown font weight");
618 g_object_set(tag_object, "weight", i, "weight-set", TRUE, NULL);
622 g_object_set(tag_object, "size", 14+(2*val), "size-set", TRUE, NULL);
625 case stylehint_Oblique:
626 g_object_set(tag_object, "style", val ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL, "style-set", TRUE, NULL);
629 case stylehint_Proportional:
632 GtkTextTag *font_tag = g_hash_table_lookup(
633 wintype == wintype_TextBuffer? glk_data->default_styles->text_buffer : glk_data->default_styles->text_grid,
634 val? "normal" : "preformatted");
635 g_object_get(font_tag, "family", &font_family, NULL);
636 g_object_set(tag_object, "family", font_family, "family-set", TRUE, NULL);
641 case stylehint_TextColor:
642 glkcolor_to_hex(val, color);
645 g_object_set(tag_object, "foreground", color, "foreground-set", TRUE, NULL);
647 g_object_set(tag_object, "background", color, "background-set", TRUE, NULL);
651 case stylehint_BackColor:
652 glkcolor_to_hex(val, color);
655 g_object_set(tag_object, "background", color, "background-set", TRUE, NULL);
657 g_object_set(tag_object, "foreground", color, "background-set", TRUE, NULL);
661 case stylehint_ReverseColor:
662 if(reverse_color != val) {
663 /* Flip the fore- and background colors */
664 GdkColor* foreground_color;
665 GdkColor* background_color;
666 gint f_set, b_set = 0;
667 g_object_get(tag_object, "foreground-set", &f_set, "background-set", &b_set, NULL);
670 g_object_get(tag_object, "foreground-gdk", &foreground_color, NULL);
672 g_object_get(tag_object, "background-gdk", &background_color, NULL);
675 g_object_set(tag_object, "foreground-gdk", background_color, NULL);
677 g_object_set(tag_object, "foreground", "#ffffff", NULL);
680 g_object_set(tag_object, "background-gdk", foreground_color, NULL);
682 g_object_set(tag_object, "background", "#000000", NULL);
684 g_object_set_data( tag_object, "reverse-color", GINT_TO_POINTER(val != 0) );
689 WARNING("Unknown style hint");
693 /* Internal function: queries a text tag for the value of a given style hint */
695 query_tag(GtkTextTag *tag, glui32 wintype, glui32 hint)
700 g_return_val_if_fail(tag != NULL, 0);
702 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
705 case stylehint_Indentation:
706 g_object_get(tag, "left_margin", &intval, NULL);
709 case stylehint_ParaIndentation:
710 g_object_get(tag, "indent", &intval, NULL);
713 case stylehint_Justification:
714 g_object_get(tag, "justification", &intval, NULL);
716 case GTK_JUSTIFY_LEFT: return stylehint_just_LeftFlush;
717 case GTK_JUSTIFY_FILL: return stylehint_just_LeftRight;
718 case GTK_JUSTIFY_CENTER: return stylehint_just_Centered;
719 case GTK_JUSTIFY_RIGHT: return stylehint_just_RightFlush;
721 WARNING("Unknown justification");
722 return stylehint_just_LeftFlush;
725 case stylehint_Weight:
726 g_object_get(tag, "weight", &intval, NULL);
728 case PANGO_WEIGHT_LIGHT: return -1;
729 case PANGO_WEIGHT_NORMAL: return 0;
730 case PANGO_WEIGHT_BOLD: return 1;
731 default: WARNING("Unknown font weight"); return 0;
735 g_object_get(tag, "size", &intval, NULL);
736 return (intval/2)-14;
738 case stylehint_Oblique:
739 g_object_get(tag, "style", &intval , NULL);
740 return intval == PANGO_STYLE_ITALIC ? 1 : 0;
742 case stylehint_Proportional:
743 /* Use pango_font_family_is_monospace()? */
745 gchar *font_family, *query_font_family;
746 GtkTextTag *font_tag = g_hash_table_lookup(
747 wintype == wintype_TextBuffer? glk_data->default_styles->text_buffer : glk_data->default_styles->text_grid,
749 g_object_get(font_tag, "family", &font_family, NULL);
750 g_object_get(tag, "family", &query_font_family, NULL);
751 gint retval = strcmp(font_family, query_font_family)? 0 : 1;
753 g_free(query_font_family);
757 case stylehint_TextColor:
758 g_object_get(tag, "foreground-gdk", &colval, NULL);
759 return gdkcolor_to_glkcolor(colval);
761 case stylehint_BackColor:
762 g_object_get(tag, "background-gdk", &colval, NULL);
763 return gdkcolor_to_glkcolor(colval);
765 case stylehint_ReverseColor:
766 return GPOINTER_TO_INT( g_object_get_data(G_OBJECT(tag), "reverse_color") );
769 WARNING("Unknown style hint");
777 * @wintype: The window type to set a style hint on, or %wintype_AllTypes.
778 * @styl: The style to set a hint for.
779 * @hint: The type of style hint, one of the <code>stylehint_</code> constants.
780 * @val: The style hint. The meaning of this depends on @hint.
782 * Sets a hint about the appearance of one style for a particular type of
783 * window. You can also set @wintype to %wintype_AllTypes, which sets a hint for
784 * all types of window.
786 * There is no equivalent constant to set a hint for all styles of a single
791 glk_stylehint_set(glui32 wintype, glui32 styl, glui32 hint, glsi32 val)
793 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
795 GtkTextTag *to_change;
796 if(wintype == wintype_TextBuffer || wintype == wintype_AllTypes) {
797 to_change = g_hash_table_lookup( glk_data->current_styles->text_buffer, get_tag_name(styl) );
798 apply_stylehint_to_tag(to_change, wintype_TextBuffer, hint, val);
801 if(wintype == wintype_TextGrid || wintype == wintype_AllTypes) {
802 to_change = g_hash_table_lookup( glk_data->current_styles->text_grid, get_tag_name(styl) );
803 apply_stylehint_to_tag(to_change, wintype_TextGrid, hint, val);
808 * glk_stylehint_clear:
809 * @wintype: The window type to set a style hint on, or %wintype_AllTypes.
810 * @styl: The style to set a hint for.
811 * @hint: The type of style hint, one of the <code>stylehint_</code> constants.
813 * Clears a hint about the appearance of one style for a particular type of
814 * window to its default value. You can also set @wintype to %wintype_AllTypes,
815 * which clears a hint for all types of window.
817 * There is no equivalent constant to reset a hint for all styles of a single
822 glk_stylehint_clear(glui32 wintype, glui32 styl, glui32 hint)
824 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
828 case wintype_TextBuffer:
829 tag = g_hash_table_lookup( glk_data->default_styles->text_buffer, get_tag_name(styl) );
830 glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) );
832 case wintype_TextGrid:
833 tag = g_hash_table_lookup( glk_data->default_styles->text_grid, get_tag_name(styl) );
834 glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) );
841 * glk_style_distinguish:
842 * @win: The window in which the styles are to be distinguished.
843 * @styl1: The first style to be distinguished from the second style.
844 * @styl2: The second style to be distinguished from the first style.
846 * Decides whether two styles are visually distinguishable in the given window.
847 * The exact meaning of this is left for the library to determine.
848 * <note><title>Chimara</title><para>
849 * Currently, all styles of one window are assumed to be mutually
853 * Returns: %TRUE (1) if the two styles are visually distinguishable. If they
854 * are not, it returns %FALSE (0).
857 glk_style_distinguish(winid_t win, glui32 styl1, glui32 styl2)
860 return styl1 != styl2;
865 * @win: The window from which to take the style.
866 * @styl: The style to perform the measurement on.
867 * @hint: The stylehint to measure.
868 * @result: Address to write the result to.
870 * Tries to test an attribute of one style in the given window @win. The library
871 * may not be able to determine the attribute; if not, this returns %FALSE (0).
872 * If it can, it returns %TRUE (1) and stores the value in the location pointed
875 * As usual, it is legal for @result to be %NULL, although fairly pointless.
878 * The meaning of the value depends on the hint which was tested:
881 * <term>%stylehint_Indentation, %stylehint_ParaIndentation</term>
882 * <listitem><para>The indentation and paragraph indentation. These are in a
883 * metric which is platform-dependent.</para>
884 * <note><para>Most likely either characters or pixels.</para></note>
888 * <term>%stylehint_Justification</term>
889 * <listitem><para>One of the constants %stylehint_just_LeftFlush,
890 * %stylehint_just_LeftRight, %stylehint_just_Centered, or
891 * %stylehint_just_RightFlush.</para></listitem>
894 * <term>%stylehint_Size</term>
895 * <listitem><para>The font size. Again, this is in a platform-dependent
897 * <note><para>Pixels, points, or simply 1 if the library does not support
898 * varying font sizes.</para></note>
902 * <term>%stylehint_Weight</term>
903 * <listitem><para>1 for heavy-weight fonts (boldface), 0 for normal weight,
904 * and -1 for light-weight fonts.</para></listitem>
907 * <term>%stylehint_Oblique</term>
908 * <listitem><para>1 for oblique fonts (italic), or 0 for normal angle.</para>
912 * <term>%stylehint_Proportional</term>
913 * <listitem><para>1 for proportional-width fonts, or 0 for fixed-width.
917 * <term>%stylehint_TextColor, %stylehint_BackColor</term>
918 * <listitem><para>These are values from 0x00000000 to 0x00FFFFFF, encoded as
920 * linkend="chimara-Suggesting-the-Appearance-of-Styles">Suggesting the
921 * Appearance of Styles</link>.</para></listitem>
924 * <term>%stylehint_ReverseColor</term>
925 * <listitem><para>0 for normal printing, 1 if the foreground and background
926 * colors are reversed.</para></listitem>
930 * Returns: TRUE upon successul retrieval, otherwise FALSE.
933 glk_style_measure(winid_t win, glui32 styl, glui32 hint, glui32 *result)
935 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
939 case wintype_TextBuffer:
940 tag = g_hash_table_lookup( glk_data->current_styles->text_buffer, get_tag_name(styl) );
942 *result = query_tag(tag, win->type, hint);
944 case wintype_TextGrid:
945 tag = g_hash_table_lookup( glk_data->current_styles->text_grid, get_tag_name(styl) );
947 *result = query_tag(tag, win->type, hint);
955 /* Internal function returning the current default font for a window type
956 * This can be used later for size calculations. Only wintype_TextGrid and wintype_TextBuffer are
957 * supported for now */
958 PangoFontDescription *
959 get_current_font(guint32 wintype)
961 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
965 case wintype_TextGrid:
966 normal = g_hash_table_lookup(glk_data->current_styles->text_grid, "normal");
968 case wintype_TextBuffer:
969 normal = g_hash_table_lookup(glk_data->current_styles->text_buffer, "normal");
975 PangoFontDescription *font;
976 g_object_get( G_OBJECT(normal), "font-desc", &font, NULL );
981 /* Internal function copying the attributes of a text tag to a pango attribute list */
983 text_tag_to_attr_list(GtkTextTag *tag, PangoAttrList *list)
986 GdkColor *foreground, *background;
988 PangoFontDescription *font_desc;
989 gboolean strikethrough;
990 PangoUnderline underline;
992 g_object_get(tag, "foreground-set", &set, "foreground-gdk", &foreground, NULL);
994 pango_attr_list_insert(
996 pango_attr_foreground_new(foreground->red, foreground->green, foreground->blue)
999 g_object_get(tag, "background-set", &set, "background-gdk", &background, NULL);
1001 pango_attr_list_insert(
1003 pango_attr_background_new(background->red, background->green, background->blue)
1006 g_object_get(tag, "language-set", &set, "language", &string, NULL);
1008 pango_attr_list_insert(
1010 pango_attr_language_new( pango_language_from_string(string) )
1014 /* Font description updates the following properties simultaniously:
1015 * family, style, weight, variant, stretch, size
1017 g_object_get(tag, "font-desc", &font_desc, NULL);
1018 pango_attr_list_insert(
1020 pango_attr_font_desc_new(font_desc)
1023 g_object_get(tag, "strikethrough-set", &set, "strikethrough", &strikethrough, NULL);
1025 pango_attr_list_insert(
1027 pango_attr_strikethrough_new(strikethrough)
1030 g_object_get(tag, "underline-set", &set, "underline", &underline, NULL);
1032 pango_attr_list_insert(
1034 pango_attr_underline_new(underline)