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);
293 /* Reset style tables to the library's internal defaults */
295 reset_default_styles(ChimaraGlk *glk)
297 /* TODO: write this function */
300 /* Copy the default styles to the current styles
301 FIXME: This function is temporary and will not be needed later on */
303 copy_default_styles_to_current_styles(ChimaraGlk *glk)
305 CHIMARA_GLK_USE_PRIVATE(glk, priv);
306 g_hash_table_foreach(priv->default_styles->text_grid, style_table_copy, priv->current_styles->text_grid);
307 g_hash_table_foreach(priv->default_styles->text_buffer, style_table_copy, priv->current_styles->text_buffer);
309 GtkTextTag *pager_tag = GTK_TEXT_TAG( g_hash_table_lookup(priv->default_styles->text_buffer, "pager") );
310 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);
313 /* Create the CSS file scanner */
315 create_css_file_scanner(void)
317 GScanner *scanner = g_scanner_new(NULL);
318 scanner->config->cset_identifier_first = G_CSET_a_2_z G_CSET_A_2_Z "#";
319 scanner->config->cset_identifier_nth = G_CSET_a_2_z G_CSET_A_2_Z "-_" G_CSET_DIGITS;
320 scanner->config->symbol_2_token = TRUE;
321 scanner->config->cpair_comment_single = NULL;
322 scanner->config->scan_float = FALSE;
326 /* Run the scanner over the CSS file, overriding the default styles */
328 scan_css_file(GScanner *scanner, ChimaraGlk *glk)
330 while( g_scanner_peek_next_token(scanner) != G_TOKEN_EOF) {
331 if( !style_accept_style_selector(scanner, glk) )
335 g_scanner_destroy(scanner);
338 /* Internal function: parses a token */
340 style_accept(GScanner *scanner, GTokenType token)
342 GTokenType next = g_scanner_get_next_token(scanner);
344 g_scanner_unexp_token(scanner, token, NULL, NULL, NULL, "CSS Error", 1);
350 /* Internal function: parses a style selector */
352 style_accept_style_selector(GScanner *scanner, ChimaraGlk *glk)
354 CHIMARA_GLK_USE_PRIVATE(glk, priv);
356 GtkTextTag *current_tag;
358 GTokenType token = g_scanner_get_next_token(scanner);
359 GTokenValue value = g_scanner_cur_value(scanner);
362 token != G_TOKEN_IDENTIFIER ||
363 ( strcmp(value.v_identifier, "buffer") && strcmp(value.v_identifier, "grid") )
365 g_scanner_error(scanner, "CSS Error: buffer/grid expected");
369 field = g_strdup(value.v_identifier);
371 if( !style_accept(scanner, '.') )
374 token = g_scanner_get_next_token(scanner);
375 value = g_scanner_cur_value(scanner);
377 if(token != G_TOKEN_IDENTIFIER) {
378 g_scanner_error(scanner, "CSS Error: style selector expected");
382 if( !strcmp(field, "buffer") )
383 current_tag = g_hash_table_lookup(priv->default_styles->text_buffer, value.v_identifier);
385 current_tag = g_hash_table_lookup(priv->default_styles->text_grid, value.v_identifier);
387 if(current_tag == NULL) {
388 g_scanner_error(scanner, "CSS Error: invalid style identifier");
392 if( !style_accept(scanner, '{') )
395 while( g_scanner_peek_next_token(scanner) != '}') {
396 if( !style_accept_style_hint(scanner, current_tag) )
400 if( !style_accept(scanner, '}') )
406 /* Internal function: parses a style hint */
408 style_accept_style_hint(GScanner *scanner, GtkTextTag *current_tag)
410 GTokenType token = g_scanner_get_next_token(scanner);
411 GTokenValue value = g_scanner_cur_value(scanner);
414 if(token != G_TOKEN_IDENTIFIER) {
415 g_scanner_error(scanner, "CSS Error: style hint expected");
419 hint = g_strdup(value.v_identifier);
421 if( !style_accept(scanner, ':') )
424 token = g_scanner_get_next_token(scanner);
425 value = g_scanner_cur_value(scanner);
427 if( !strcmp(hint, "font-family") ) {
428 if(token != G_TOKEN_STRING) {
429 g_scanner_error(scanner, "CSS Error: string expected");
432 g_object_set(current_tag, "family", value.v_string, "family-set", TRUE, NULL);
434 else if( !strcmp(hint, "font-weight") ) {
435 if(token != G_TOKEN_IDENTIFIER) {
436 g_scanner_error(scanner, "CSS Error: bold/normal expected");
440 if( !strcmp(value.v_identifier, "bold") )
441 g_object_set(current_tag, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL);
442 else if( !strcmp(value.v_identifier, "normal") )
443 g_object_set(current_tag, "weight", PANGO_WEIGHT_NORMAL, "weight-set", TRUE, NULL);
445 g_scanner_error(scanner, "CSS Error: bold/normal expected");
449 else if( !strcmp(hint, "font-style") ) {
450 if(token != G_TOKEN_IDENTIFIER) {
451 g_scanner_error(scanner, "CSS Error: italic/normal expected");
455 if( !strcmp(value.v_identifier, "italic") )
456 g_object_set(current_tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
457 else if( !strcmp(value.v_identifier, "normal") )
458 g_object_set(current_tag, "style", PANGO_STYLE_NORMAL, "style-set", TRUE, NULL);
460 g_scanner_error(scanner, "CSS Error: italic/normal expected");
464 else if( !strcmp(hint, "font-size") ) {
465 if(token == G_TOKEN_INT)
466 g_object_set(current_tag, "size-points", (float)value.v_int, "size-set", TRUE, NULL);
467 else if(token == G_TOKEN_FLOAT)
468 g_object_set(current_tag, "size-points", value.v_float, "size-set", TRUE, NULL);
470 g_scanner_error(scanner, "CSS Error: integer or float expected");
474 else if( !strcmp(hint, "color") ) {
475 if(token != G_TOKEN_IDENTIFIER) {
476 g_scanner_error(scanner, "CSS Error: hex color expected");
480 g_object_set(current_tag, "foreground", value.v_identifier, "foreground-set", TRUE, NULL);
482 else if( !strcmp(hint, "background-color") ) {
483 if(token != G_TOKEN_IDENTIFIER) {
484 g_scanner_error(scanner, "CSS Error: hex color expected");
487 g_object_set(current_tag, "background", value.v_identifier, "background-set", TRUE, NULL);
489 else if( !strcmp(hint, "text-align") ) {
490 if(token != G_TOKEN_IDENTIFIER) {
491 g_scanner_error(scanner, "CSS Error: left/right/center expected");
495 if( !strcmp(value.v_identifier, "left") )
496 g_object_set(current_tag, "justification", GTK_JUSTIFY_LEFT, "justification-set", TRUE, NULL);
497 else if( !strcmp(value.v_identifier, "right") )
498 g_object_set(current_tag, "justification", GTK_JUSTIFY_RIGHT, "justification-set", TRUE, NULL);
499 else if( !strcmp(value.v_identifier, "center") )
500 g_object_set(current_tag, "justification", GTK_JUSTIFY_CENTER, "justification-set", TRUE, NULL);
502 g_scanner_error(scanner, "CSS Error: left/right/center expected");
506 else if( !strcmp(hint, "margin-left") ) {
507 if(token != G_TOKEN_INT) {
508 g_scanner_error(scanner, "CSS Error: integer expected");
511 g_object_set(current_tag, "left-margin", value.v_int, "left-margin-set", TRUE, NULL);
513 else if( !strcmp(hint, "margin-right") ) {
514 if(token != G_TOKEN_INT) {
515 g_scanner_error(scanner, "CSS Error: integer expected");
518 g_object_set(current_tag, "right-margin", value.v_int, "right-margin-set", TRUE, NULL);
520 else if( !strcmp(hint, "margin-top") ) {
521 if(token != G_TOKEN_INT) {
522 g_scanner_error(scanner, "CSS Error: integer expected");
525 g_object_set(current_tag, "pixels-above-lines", value.v_int, "pixels-above-lines-set", TRUE, NULL);
527 else if( !strcmp(hint, "margin-bottom") ) {
528 if(token != G_TOKEN_INT) {
529 g_scanner_error(scanner, "CSS Error: integer expected");
532 g_object_set(current_tag, "pixels-below-lines", value.v_int, "pixels-below-lines-set", TRUE, NULL);
536 g_scanner_error(scanner, "CSS Error: invalid style hint %s", hint);
540 if( !style_accept(scanner, ';') )
546 /* Internal function: parses a glk color to a #hex-value */
548 glkcolor_to_hex(glui32 val, gchar *buffer)
550 g_return_if_fail(buffer != NULL);
552 sprintf(buffer, "#%02X%02X%02X",
553 ((val & 0xff0000) >> 16),
554 ((val & 0x00ff00) >> 8),
559 /* Internal function: parses a glk color to a GdkColor */
561 glkcolor_to_gdkcolor(glui32 val, GdkColor *color)
563 color->red = 256 * ((val & 0xff0000) >> 16);
564 color->green = 256 * ((val & 0x00ff00) >> 8);
565 color->blue = 256 * (val & 0x0000ff);
568 /* Internal function: parses a GdkColor to a glk color */
570 gdkcolor_to_glkcolor(GdkColor *color)
572 g_return_val_if_fail(color != NULL, 0);
573 return (glui32) color->pixel;
576 /* Internal function: changes a GTK tag to correspond with the given style. */
578 apply_stylehint_to_tag(GtkTextTag *tag, glui32 wintype, glui32 hint, glsi32 val)
580 g_return_if_fail(tag != NULL);
582 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
583 GObject *tag_object = G_OBJECT(tag);
585 gint reverse_color = GPOINTER_TO_INT( g_object_get_data(tag_object, "reverse-color") );
590 case stylehint_Indentation:
591 g_object_set(tag_object, "left-margin", 5*val, "left-margin-set", TRUE, NULL);
592 g_object_set(tag_object, "right-margin", 5*val, "right-margin-set", TRUE, NULL);
595 case stylehint_ParaIndentation:
596 g_object_set(tag_object, "indent", 5*val, "indent-set", TRUE, NULL);
599 case stylehint_Justification:
601 case stylehint_just_LeftFlush: i = GTK_JUSTIFY_LEFT; break;
602 case stylehint_just_LeftRight: i = GTK_JUSTIFY_FILL; break;
603 case stylehint_just_Centered: i = GTK_JUSTIFY_CENTER; break;
604 case stylehint_just_RightFlush: i = GTK_JUSTIFY_RIGHT; break;
606 WARNING("Unknown justification");
607 i = GTK_JUSTIFY_LEFT;
609 g_object_set(tag_object, "justification", i, "justification-set", TRUE, NULL);
612 case stylehint_Weight:
614 case -1: i = PANGO_WEIGHT_LIGHT; break;
615 case 0: i = PANGO_WEIGHT_NORMAL; break;
616 case 1: i = PANGO_WEIGHT_BOLD; break;
617 default: WARNING("Unknown font weight");
619 g_object_set(tag_object, "weight", i, "weight-set", TRUE, NULL);
623 g_object_set(tag_object, "size", 14+(2*val), "size-set", TRUE, NULL);
626 case stylehint_Oblique:
627 g_object_set(tag_object, "style", val ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL, "style-set", TRUE, NULL);
630 case stylehint_Proportional:
633 GtkTextTag *font_tag = g_hash_table_lookup(
634 wintype == wintype_TextBuffer? glk_data->default_styles->text_buffer : glk_data->default_styles->text_grid,
635 val? "normal" : "preformatted");
636 g_object_get(font_tag, "family", &font_family, NULL);
637 g_object_set(tag_object, "family", font_family, "family-set", TRUE, NULL);
642 case stylehint_TextColor:
643 glkcolor_to_hex(val, color);
646 g_object_set(tag_object, "foreground", color, "foreground-set", TRUE, NULL);
648 g_object_set(tag_object, "background", color, "background-set", TRUE, NULL);
652 case stylehint_BackColor:
653 glkcolor_to_hex(val, color);
656 g_object_set(tag_object, "background", color, "background-set", TRUE, NULL);
658 g_object_set(tag_object, "foreground", color, "background-set", TRUE, NULL);
662 case stylehint_ReverseColor:
663 if(reverse_color != val) {
664 /* Flip the fore- and background colors */
665 GdkColor* foreground_color;
666 GdkColor* background_color;
667 gint f_set, b_set = 0;
668 g_object_get(tag_object, "foreground-set", &f_set, "background-set", &b_set, NULL);
671 g_object_get(tag_object, "foreground-gdk", &foreground_color, NULL);
673 g_object_get(tag_object, "background-gdk", &background_color, NULL);
676 g_object_set(tag_object, "foreground-gdk", background_color, NULL);
678 g_object_set(tag_object, "foreground", "#ffffff", NULL);
681 g_object_set(tag_object, "background-gdk", foreground_color, NULL);
683 g_object_set(tag_object, "background", "#000000", NULL);
685 g_object_set_data( tag_object, "reverse-color", GINT_TO_POINTER(val != 0) );
690 WARNING("Unknown style hint");
694 /* Internal function: queries a text tag for the value of a given style hint */
696 query_tag(GtkTextTag *tag, glui32 wintype, glui32 hint)
701 g_return_val_if_fail(tag != NULL, 0);
703 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
706 case stylehint_Indentation:
707 g_object_get(tag, "left_margin", &intval, NULL);
710 case stylehint_ParaIndentation:
711 g_object_get(tag, "indent", &intval, NULL);
714 case stylehint_Justification:
715 g_object_get(tag, "justification", &intval, NULL);
717 case GTK_JUSTIFY_LEFT: return stylehint_just_LeftFlush;
718 case GTK_JUSTIFY_FILL: return stylehint_just_LeftRight;
719 case GTK_JUSTIFY_CENTER: return stylehint_just_Centered;
720 case GTK_JUSTIFY_RIGHT: return stylehint_just_RightFlush;
722 WARNING("Unknown justification");
723 return stylehint_just_LeftFlush;
726 case stylehint_Weight:
727 g_object_get(tag, "weight", &intval, NULL);
729 case PANGO_WEIGHT_LIGHT: return -1;
730 case PANGO_WEIGHT_NORMAL: return 0;
731 case PANGO_WEIGHT_BOLD: return 1;
732 default: WARNING("Unknown font weight"); return 0;
736 g_object_get(tag, "size", &intval, NULL);
737 return (intval/2)-14;
739 case stylehint_Oblique:
740 g_object_get(tag, "style", &intval , NULL);
741 return intval == PANGO_STYLE_ITALIC ? 1 : 0;
743 case stylehint_Proportional:
744 /* Use pango_font_family_is_monospace()? */
746 gchar *font_family, *query_font_family;
747 GtkTextTag *font_tag = g_hash_table_lookup(
748 wintype == wintype_TextBuffer? glk_data->default_styles->text_buffer : glk_data->default_styles->text_grid,
750 g_object_get(font_tag, "family", &font_family, NULL);
751 g_object_get(tag, "family", &query_font_family, NULL);
752 gint retval = strcmp(font_family, query_font_family)? 0 : 1;
754 g_free(query_font_family);
758 case stylehint_TextColor:
759 g_object_get(tag, "foreground-gdk", &colval, NULL);
760 return gdkcolor_to_glkcolor(colval);
762 case stylehint_BackColor:
763 g_object_get(tag, "background-gdk", &colval, NULL);
764 return gdkcolor_to_glkcolor(colval);
766 case stylehint_ReverseColor:
767 return GPOINTER_TO_INT( g_object_get_data(G_OBJECT(tag), "reverse_color") );
770 WARNING("Unknown style hint");
778 * @wintype: The window type to set a style hint on, or %wintype_AllTypes.
779 * @styl: The style to set a hint for.
780 * @hint: The type of style hint, one of the <code>stylehint_</code> constants.
781 * @val: The style hint. The meaning of this depends on @hint.
783 * Sets a hint about the appearance of one style for a particular type of
784 * window. You can also set @wintype to %wintype_AllTypes, which sets a hint for
785 * all types of window.
787 * There is no equivalent constant to set a hint for all styles of a single
792 glk_stylehint_set(glui32 wintype, glui32 styl, glui32 hint, glsi32 val)
794 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
796 GtkTextTag *to_change;
797 if(wintype == wintype_TextBuffer || wintype == wintype_AllTypes) {
798 to_change = g_hash_table_lookup( glk_data->current_styles->text_buffer, get_tag_name(styl) );
799 apply_stylehint_to_tag(to_change, wintype_TextBuffer, hint, val);
802 if(wintype == wintype_TextGrid || wintype == wintype_AllTypes) {
803 to_change = g_hash_table_lookup( glk_data->current_styles->text_grid, get_tag_name(styl) );
804 apply_stylehint_to_tag(to_change, wintype_TextGrid, hint, val);
809 * glk_stylehint_clear:
810 * @wintype: The window type to set a style hint on, or %wintype_AllTypes.
811 * @styl: The style to set a hint for.
812 * @hint: The type of style hint, one of the <code>stylehint_</code> constants.
814 * Clears a hint about the appearance of one style for a particular type of
815 * window to its default value. You can also set @wintype to %wintype_AllTypes,
816 * which clears a hint for all types of window.
818 * There is no equivalent constant to reset a hint for all styles of a single
823 glk_stylehint_clear(glui32 wintype, glui32 styl, glui32 hint)
825 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
829 case wintype_TextBuffer:
830 tag = g_hash_table_lookup( glk_data->default_styles->text_buffer, get_tag_name(styl) );
831 glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) );
833 case wintype_TextGrid:
834 tag = g_hash_table_lookup( glk_data->default_styles->text_grid, get_tag_name(styl) );
835 glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) );
842 * glk_style_distinguish:
843 * @win: The window in which the styles are to be distinguished.
844 * @styl1: The first style to be distinguished from the second style.
845 * @styl2: The second style to be distinguished from the first style.
847 * Decides whether two styles are visually distinguishable in the given window.
848 * The exact meaning of this is left for the library to determine.
849 * <note><title>Chimara</title><para>
850 * Currently, all styles of one window are assumed to be mutually
854 * Returns: %TRUE (1) if the two styles are visually distinguishable. If they
855 * are not, it returns %FALSE (0).
858 glk_style_distinguish(winid_t win, glui32 styl1, glui32 styl2)
861 return styl1 != styl2;
866 * @win: The window from which to take the style.
867 * @styl: The style to perform the measurement on.
868 * @hint: The stylehint to measure.
869 * @result: Address to write the result to.
871 * Tries to test an attribute of one style in the given window @win. The library
872 * may not be able to determine the attribute; if not, this returns %FALSE (0).
873 * If it can, it returns %TRUE (1) and stores the value in the location pointed
876 * As usual, it is legal for @result to be %NULL, although fairly pointless.
879 * The meaning of the value depends on the hint which was tested:
882 * <term>%stylehint_Indentation, %stylehint_ParaIndentation</term>
883 * <listitem><para>The indentation and paragraph indentation. These are in a
884 * metric which is platform-dependent.</para>
885 * <note><para>Most likely either characters or pixels.</para></note>
889 * <term>%stylehint_Justification</term>
890 * <listitem><para>One of the constants %stylehint_just_LeftFlush,
891 * %stylehint_just_LeftRight, %stylehint_just_Centered, or
892 * %stylehint_just_RightFlush.</para></listitem>
895 * <term>%stylehint_Size</term>
896 * <listitem><para>The font size. Again, this is in a platform-dependent
898 * <note><para>Pixels, points, or simply 1 if the library does not support
899 * varying font sizes.</para></note>
903 * <term>%stylehint_Weight</term>
904 * <listitem><para>1 for heavy-weight fonts (boldface), 0 for normal weight,
905 * and -1 for light-weight fonts.</para></listitem>
908 * <term>%stylehint_Oblique</term>
909 * <listitem><para>1 for oblique fonts (italic), or 0 for normal angle.</para>
913 * <term>%stylehint_Proportional</term>
914 * <listitem><para>1 for proportional-width fonts, or 0 for fixed-width.
918 * <term>%stylehint_TextColor, %stylehint_BackColor</term>
919 * <listitem><para>These are values from 0x00000000 to 0x00FFFFFF, encoded as
921 * linkend="chimara-Suggesting-the-Appearance-of-Styles">Suggesting the
922 * Appearance of Styles</link>.</para></listitem>
925 * <term>%stylehint_ReverseColor</term>
926 * <listitem><para>0 for normal printing, 1 if the foreground and background
927 * colors are reversed.</para></listitem>
931 * Returns: TRUE upon successul retrieval, otherwise FALSE.
934 glk_style_measure(winid_t win, glui32 styl, glui32 hint, glui32 *result)
936 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
940 case wintype_TextBuffer:
941 tag = g_hash_table_lookup( glk_data->current_styles->text_buffer, get_tag_name(styl) );
943 *result = query_tag(tag, win->type, hint);
945 case wintype_TextGrid:
946 tag = g_hash_table_lookup( glk_data->current_styles->text_grid, get_tag_name(styl) );
948 *result = query_tag(tag, win->type, hint);
956 /* Internal function returning the current default font for a window type
957 * This can be used later for size calculations. Only wintype_TextGrid and wintype_TextBuffer are
958 * supported for now */
959 PangoFontDescription *
960 get_current_font(guint32 wintype)
962 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
966 case wintype_TextGrid:
967 normal = g_hash_table_lookup(glk_data->current_styles->text_grid, "normal");
969 case wintype_TextBuffer:
970 normal = g_hash_table_lookup(glk_data->current_styles->text_buffer, "normal");
976 PangoFontDescription *font;
977 g_object_get( G_OBJECT(normal), "font-desc", &font, NULL );
982 /* Internal function copying the attributes of a text tag to a pango attribute list */
984 text_tag_to_attr_list(GtkTextTag *tag, PangoAttrList *list)
987 GdkColor *foreground, *background;
989 PangoFontDescription *font_desc;
990 gboolean strikethrough;
991 PangoUnderline underline;
993 g_object_get(tag, "foreground-set", &set, "foreground-gdk", &foreground, NULL);
995 pango_attr_list_insert(
997 pango_attr_foreground_new(foreground->red, foreground->green, foreground->blue)
1000 g_object_get(tag, "background-set", &set, "background-gdk", &background, NULL);
1002 pango_attr_list_insert(
1004 pango_attr_background_new(background->red, background->green, background->blue)
1007 g_object_get(tag, "language-set", &set, "language", &string, NULL);
1009 pango_attr_list_insert(
1011 pango_attr_language_new( pango_language_from_string(string) )
1015 /* Font description updates the following properties simultaniously:
1016 * family, style, weight, variant, stretch, size
1018 g_object_get(tag, "font-desc", &font_desc, NULL);
1019 pango_attr_list_insert(
1021 pango_attr_font_desc_new(font_desc)
1024 g_object_get(tag, "strikethrough-set", &set, "strikethrough", &strikethrough, NULL);
1026 pango_attr_list_insert(
1028 pango_attr_strikethrough_new(strikethrough)
1031 g_object_get(tag, "underline-set", &set, "underline", &underline, NULL);
1033 pango_attr_list_insert(
1035 pango_attr_underline_new(underline)