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);
42 static const gchar* TAG_NAMES[] = {
58 static const gchar* GLK_TAG_NAMES[] = {
72 /* Internal function: mapping from style enum to tag name */
74 get_tag_name(glui32 style)
76 if(style >= NUM_STYLES) {
77 WARNING("Unsupported style");
80 return (gchar*) TAG_NAMES[style];
84 /* Internal function: mapping from glk style enum to tag name */
86 get_glk_tag_name(glui32 style)
88 if(style >= style_NUMSTYLES) {
89 WARNING("Unsupported style");
92 return (gchar*) GLK_TAG_NAMES[style];
97 * glk_set_style_stream:
98 * @str: Output stream to change the style of
99 * @styl: The style to apply
101 * This changes the style of the stream @str. See glk_set_style().
104 glk_set_style_stream(strid_t str, glui32 styl) {
105 if(str->window == NULL)
108 flush_window_buffer(str->window);
109 str->style = get_tag_name(styl);
110 str->glk_style = get_glk_tag_name(styl);
113 /* Internal function: call this to initialize the layout of the 'more' prompt. */
115 style_init_more_prompt(winid_t win)
117 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
119 win->pager_layout = gtk_widget_create_pango_layout(win->widget, "More");
120 pango_layout_set_attributes(win->pager_layout, glk_data->pager_attr_list);
123 /* Internal function: call this to initialize the default styles to a textbuffer. */
125 style_init_textbuffer(GtkTextBuffer *buffer)
127 g_return_if_fail(buffer != NULL);
129 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
131 /* Place the default text tags in the textbuffer's tag table */
132 g_hash_table_foreach(glk_data->styles->text_buffer, style_add_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
134 /* Copy the override text tags to the textbuffers's tag table */
135 g_hash_table_foreach(glk_data->glk_styles->text_buffer, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
139 /* Internal function: call this to initialize the default styles to a textgrid. */
141 style_init_textgrid(GtkTextBuffer *buffer)
143 g_return_if_fail(buffer != NULL);
145 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
147 /* Place the default text tags in the textbuffer's tag table */
148 g_hash_table_foreach(glk_data->styles->text_grid, style_add_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
150 /* Copy the current text tags to the textbuffers's tag table */
151 g_hash_table_foreach(glk_data->glk_styles->text_grid, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
154 /* Internal function used to iterate over the default text tag table, applying them to a textbuffer */
156 style_add_tag_to_textbuffer(gpointer key, gpointer tag, gpointer tag_table)
158 g_return_if_fail(key != NULL);
159 g_return_if_fail(tag != NULL);
160 g_return_if_fail(tag_table != NULL);
162 gtk_text_tag_table_add(tag_table, tag);
165 /* Internal function used to iterate over a style table, copying it */
167 style_copy_tag_to_textbuffer(gpointer key, gpointer tag, gpointer target_table)
169 g_return_if_fail(key != NULL);
170 g_return_if_fail(tag != NULL);
171 g_return_if_fail(target_table != NULL);
173 gtk_text_tag_table_add(target_table, gtk_text_tag_copy( GTK_TEXT_TAG(tag) ));
176 /* Internal function that copies a text tag */
178 gtk_text_tag_copy(GtkTextTag *tag)
182 g_return_val_if_fail(tag != NULL, NULL);
184 copy = gtk_text_tag_new(tag->name);
185 gtk_text_attributes_copy_values(tag->values, copy->values);
187 #define _COPY_FLAG(flag) copy->flag = tag->flag
188 _COPY_FLAG (bg_color_set);
189 _COPY_FLAG (bg_color_set);
190 _COPY_FLAG (bg_stipple_set);
191 _COPY_FLAG (fg_color_set);
192 _COPY_FLAG (fg_stipple_set);
193 _COPY_FLAG (justification_set);
194 _COPY_FLAG (left_margin_set);
195 _COPY_FLAG (indent_set);
196 _COPY_FLAG (rise_set);
197 _COPY_FLAG (strikethrough_set);
198 _COPY_FLAG (right_margin_set);
199 _COPY_FLAG (pixels_above_lines_set);
200 _COPY_FLAG (pixels_below_lines_set);
201 _COPY_FLAG (pixels_inside_wrap_set);
202 _COPY_FLAG (tabs_set);
203 _COPY_FLAG (underline_set);
204 _COPY_FLAG (wrap_mode_set);
205 _COPY_FLAG (bg_full_height_set);
206 _COPY_FLAG (invisible_set);
207 _COPY_FLAG (editable_set);
208 _COPY_FLAG (language_set);
211 /* Copy the data that was added manually */
212 gpointer reverse_color = g_object_get_data( G_OBJECT(tag), "reverse_color" );
215 g_object_set_data( G_OBJECT(copy), "reverse_color", reverse_color );
220 /* Internal function that constructs the default styles */
222 style_init(ChimaraGlk *glk)
224 CHIMARA_GLK_USE_PRIVATE(glk, priv);
226 GHashTable *default_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
227 GHashTable *default_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
228 GHashTable *glk_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
229 GHashTable *glk_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
232 PangoFontDescription *default_font_desc = pango_font_description_from_string("Serif");
233 PangoFontDescription *monospace_font_desc = pango_font_description_from_string("Monospace");
235 /* Initialise the default styles for a text grid */
236 tag = gtk_text_tag_new("normal");
237 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
238 g_hash_table_insert(default_text_grid_styles, "normal", tag);
240 tag = gtk_text_tag_new("emphasized");
241 g_object_set(tag, "font-desc", monospace_font_desc, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
242 g_hash_table_insert(default_text_grid_styles, "emphasized", tag);
244 tag = gtk_text_tag_new("preformatted");
245 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
246 g_hash_table_insert(default_text_grid_styles, "preformatted", tag);
248 tag = gtk_text_tag_new("header");
249 g_object_set(tag, "font-desc", monospace_font_desc, "weight", PANGO_WEIGHT_BOLD, NULL);
250 g_hash_table_insert(default_text_grid_styles, "header", tag);
252 tag = gtk_text_tag_new("subheader");
253 g_object_set(tag, "font-desc", monospace_font_desc, "weight", PANGO_WEIGHT_BOLD, NULL);
254 g_hash_table_insert(default_text_grid_styles, "subheader", tag);
256 tag = gtk_text_tag_new("alert");
257 g_object_set(tag, "font-desc", monospace_font_desc, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
258 g_hash_table_insert(default_text_grid_styles, "alert", tag);
260 tag = gtk_text_tag_new("note");
261 g_object_set(tag, "font-desc", monospace_font_desc, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
262 g_hash_table_insert(default_text_grid_styles, "note", tag);
264 tag = gtk_text_tag_new("block-quote");
265 g_object_set(tag, "font-desc", monospace_font_desc, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
266 g_hash_table_insert(default_text_grid_styles, "block-quote", tag);
268 tag = gtk_text_tag_new("input");
269 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
270 g_hash_table_insert(default_text_grid_styles, "input", tag);
272 tag = gtk_text_tag_new("user1");
273 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
274 g_hash_table_insert(default_text_grid_styles, "user1", tag);
276 tag = gtk_text_tag_new("user2");
277 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
278 g_hash_table_insert(default_text_grid_styles, "user2", tag);
280 tag = gtk_text_tag_new("hyperlink");
281 g_object_set(tag, "foreground", "#0000ff", "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
282 g_hash_table_insert(default_text_grid_styles, "hyperlink", tag);
284 /* Initialise the default styles for a text buffer */
285 tag = gtk_text_tag_new("normal");
286 g_object_set(tag, "font-desc", default_font_desc, NULL);
287 g_hash_table_insert(default_text_buffer_styles, "normal", tag);
289 tag = gtk_text_tag_new("emphasized");
290 g_object_set(tag, "font-desc", default_font_desc, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
291 g_hash_table_insert(default_text_buffer_styles, "emphasized", tag);
293 tag = gtk_text_tag_new("preformatted");
294 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
295 g_hash_table_insert(default_text_buffer_styles, "preformatted", tag);
297 tag = gtk_text_tag_new("header");
298 g_object_set(tag, "font-desc", default_font_desc, "size-points", 18.0, "weight", PANGO_WEIGHT_BOLD, NULL);
299 g_hash_table_insert(default_text_buffer_styles, "header", tag);
301 tag = gtk_text_tag_new("subheader");
302 g_object_set(tag, "font-desc", default_font_desc, "size-points", 14.0, "weight", PANGO_WEIGHT_BOLD, NULL);
303 g_hash_table_insert(default_text_buffer_styles, "subheader", tag);
305 tag = gtk_text_tag_new("alert");
306 g_object_set(tag, "font-desc", default_font_desc, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
307 g_hash_table_insert(default_text_buffer_styles, "alert", tag);
309 tag = gtk_text_tag_new("note");
310 g_object_set(tag, "font-desc", default_font_desc, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
311 g_hash_table_insert(default_text_buffer_styles, "note", tag);
313 tag = gtk_text_tag_new("block-quote");
314 g_object_set(tag, "font-desc", default_font_desc, "justification", GTK_JUSTIFY_CENTER, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
315 g_hash_table_insert(default_text_buffer_styles, "block-quote", tag);
317 tag = gtk_text_tag_new("input");
318 g_object_set(tag, "font-desc", default_font_desc, NULL);
319 g_hash_table_insert(default_text_buffer_styles, "input", tag);
321 tag = gtk_text_tag_new("user1");
322 g_object_set(tag, "font-desc", default_font_desc, NULL);
323 g_hash_table_insert(default_text_buffer_styles, "user1", tag);
325 tag = gtk_text_tag_new("user2");
326 g_object_set(tag, "font-desc", default_font_desc, NULL);
327 g_hash_table_insert(default_text_buffer_styles, "user2", tag);
329 tag = gtk_text_tag_new("hyperlink");
330 g_object_set(tag, "font-desc", default_font_desc, "foreground", "#0000ff", "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
331 g_hash_table_insert(default_text_buffer_styles, "hyperlink", tag);
333 GtkTextTag *pager_tag = gtk_text_tag_new("pager");
334 g_object_set(pager_tag, "font-desc", default_font_desc, "foreground", "#ffffff", "background", "#000000", NULL);
335 g_hash_table_insert(default_text_buffer_styles, "pager", pager_tag);
336 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);
338 pango_font_description_free(default_font_desc);
339 pango_font_description_free(monospace_font_desc);
341 priv->styles->text_grid = default_text_grid_styles;
342 priv->styles->text_buffer = default_text_buffer_styles;
345 /* Initialize the GLK styles to empty tags */
347 for(i=0; i<style_NUMSTYLES; i++) {
348 tag = gtk_text_tag_new(GLK_TAG_NAMES[i]);
349 g_hash_table_insert(glk_text_grid_styles, (gchar*) GLK_TAG_NAMES[i], tag);
350 g_hash_table_insert(glk_text_buffer_styles, (gchar*) GLK_TAG_NAMES[i], tag);
353 priv->glk_styles->text_grid = glk_text_grid_styles;
354 priv->glk_styles->text_buffer = glk_text_buffer_styles;
358 /* Reset style tables to the library's internal defaults */
360 reset_default_styles(ChimaraGlk *glk)
362 /* TODO: write this function */
365 /* Copy the default styles to the current styles
366 FIXME: This function is temporary and will not be needed later on */
368 copy_default_styles_to_current_styles(ChimaraGlk *glk)
371 CHIMARA_GLK_USE_PRIVATE(glk, priv);
372 g_hash_table_foreach(priv->styles->text_grid, style_table_copy, priv->glk_styles->text_grid);
373 g_hash_table_foreach(priv->styles->text_buffer, style_table_copy, priv->glk_styles->text_buffer);
375 GtkTextTag *pager_tag = GTK_TEXT_TAG( g_hash_table_lookup(priv->styles->text_buffer, "pager") );
376 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);
380 /* Create the CSS file scanner */
382 create_css_file_scanner(void)
384 GScanner *scanner = g_scanner_new(NULL);
385 scanner->config->cset_identifier_first = G_CSET_a_2_z G_CSET_A_2_Z "#";
386 scanner->config->cset_identifier_nth = G_CSET_a_2_z G_CSET_A_2_Z "-_" G_CSET_DIGITS;
387 scanner->config->symbol_2_token = TRUE;
388 scanner->config->cpair_comment_single = NULL;
389 scanner->config->scan_float = FALSE;
393 /* Run the scanner over the CSS file, overriding the default styles */
395 scan_css_file(GScanner *scanner, ChimaraGlk *glk)
397 CHIMARA_GLK_USE_PRIVATE(glk, priv);
399 while( g_scanner_peek_next_token(scanner) != G_TOKEN_EOF) {
400 if( !style_accept_style_selector(scanner, glk) )
404 g_scanner_destroy(scanner);
406 /* Update the pager prompt to the new style */
407 GtkTextTag *pager_tag = GTK_TEXT_TAG( g_hash_table_lookup(priv->styles->text_buffer, "pager") );
408 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);
411 /* Internal function: parses a token */
413 style_accept(GScanner *scanner, GTokenType token)
415 GTokenType next = g_scanner_get_next_token(scanner);
417 g_scanner_unexp_token(scanner, token, NULL, NULL, NULL, "CSS Error", 1);
423 /* Internal function: parses a style selector */
425 style_accept_style_selector(GScanner *scanner, ChimaraGlk *glk)
427 CHIMARA_GLK_USE_PRIVATE(glk, priv);
429 GtkTextTag *current_tag;
431 GTokenType token = g_scanner_get_next_token(scanner);
432 GTokenValue value = g_scanner_cur_value(scanner);
435 token != G_TOKEN_IDENTIFIER ||
436 ( strcmp(value.v_identifier, "buffer") && strcmp(value.v_identifier, "grid") )
438 g_scanner_error(scanner, "CSS Error: buffer/grid expected");
442 field = g_strdup(value.v_identifier);
444 if( !style_accept(scanner, '.') )
447 token = g_scanner_get_next_token(scanner);
448 value = g_scanner_cur_value(scanner);
450 if(token != G_TOKEN_IDENTIFIER) {
451 g_scanner_error(scanner, "CSS Error: style selector expected");
455 if( !strcmp(field, "buffer") )
456 current_tag = g_hash_table_lookup(priv->styles->text_buffer, value.v_identifier);
458 current_tag = g_hash_table_lookup(priv->styles->text_grid, value.v_identifier);
460 if(current_tag == NULL) {
461 g_scanner_error(scanner, "CSS Error: invalid style identifier");
465 if( !style_accept(scanner, '{') )
468 while( g_scanner_peek_next_token(scanner) != '}') {
469 if( !style_accept_style_hint(scanner, current_tag) )
473 if( !style_accept(scanner, '}') )
479 /* Internal function: parses a style hint */
481 style_accept_style_hint(GScanner *scanner, GtkTextTag *current_tag)
483 GTokenType token = g_scanner_get_next_token(scanner);
484 GTokenValue value = g_scanner_cur_value(scanner);
487 if(token != G_TOKEN_IDENTIFIER) {
488 g_scanner_error(scanner, "CSS Error: style hint expected");
492 hint = g_strdup(value.v_identifier);
494 if( !style_accept(scanner, ':') )
497 token = g_scanner_get_next_token(scanner);
498 value = g_scanner_cur_value(scanner);
500 if( !strcmp(hint, "font-family") ) {
501 if(token != G_TOKEN_STRING) {
502 g_scanner_error(scanner, "CSS Error: string expected");
505 g_object_set(current_tag, "family", value.v_string, "family-set", TRUE, NULL);
507 else if( !strcmp(hint, "font-weight") ) {
508 if(token != G_TOKEN_IDENTIFIER) {
509 g_scanner_error(scanner, "CSS Error: bold/normal expected");
513 if( !strcmp(value.v_identifier, "bold") )
514 g_object_set(current_tag, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL);
515 else if( !strcmp(value.v_identifier, "normal") )
516 g_object_set(current_tag, "weight", PANGO_WEIGHT_NORMAL, "weight-set", TRUE, NULL);
518 g_scanner_error(scanner, "CSS Error: bold/normal expected");
522 else if( !strcmp(hint, "font-style") ) {
523 if(token != G_TOKEN_IDENTIFIER) {
524 g_scanner_error(scanner, "CSS Error: italic/normal expected");
528 if( !strcmp(value.v_identifier, "italic") )
529 g_object_set(current_tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
530 else if( !strcmp(value.v_identifier, "normal") )
531 g_object_set(current_tag, "style", PANGO_STYLE_NORMAL, "style-set", TRUE, NULL);
533 g_scanner_error(scanner, "CSS Error: italic/normal expected");
537 else if( !strcmp(hint, "font-size") ) {
538 if(token == G_TOKEN_INT)
539 g_object_set(current_tag, "size-points", (float)value.v_int, "size-set", TRUE, NULL);
540 else if(token == G_TOKEN_FLOAT)
541 g_object_set(current_tag, "size-points", value.v_float, "size-set", TRUE, NULL);
543 g_scanner_error(scanner, "CSS Error: integer or float expected");
547 else if( !strcmp(hint, "color") ) {
548 if(token != G_TOKEN_IDENTIFIER) {
549 g_scanner_error(scanner, "CSS Error: hex color expected");
553 g_object_set(current_tag, "foreground", value.v_identifier, "foreground-set", TRUE, NULL);
555 else if( !strcmp(hint, "background-color") ) {
556 if(token != G_TOKEN_IDENTIFIER) {
557 g_scanner_error(scanner, "CSS Error: hex color expected");
560 g_object_set(current_tag, "background", value.v_identifier, "background-set", TRUE, NULL);
562 else if( !strcmp(hint, "text-align") ) {
563 if(token != G_TOKEN_IDENTIFIER) {
564 g_scanner_error(scanner, "CSS Error: left/right/center expected");
568 if( !strcmp(value.v_identifier, "left") )
569 g_object_set(current_tag, "justification", GTK_JUSTIFY_LEFT, "justification-set", TRUE, NULL);
570 else if( !strcmp(value.v_identifier, "right") )
571 g_object_set(current_tag, "justification", GTK_JUSTIFY_RIGHT, "justification-set", TRUE, NULL);
572 else if( !strcmp(value.v_identifier, "center") )
573 g_object_set(current_tag, "justification", GTK_JUSTIFY_CENTER, "justification-set", TRUE, NULL);
575 g_scanner_error(scanner, "CSS Error: left/right/center expected");
579 else if( !strcmp(hint, "margin-left") ) {
580 if(token != G_TOKEN_INT) {
581 g_scanner_error(scanner, "CSS Error: integer expected");
584 g_object_set(current_tag, "left-margin", value.v_int, "left-margin-set", TRUE, NULL);
586 else if( !strcmp(hint, "margin-right") ) {
587 if(token != G_TOKEN_INT) {
588 g_scanner_error(scanner, "CSS Error: integer expected");
591 g_object_set(current_tag, "right-margin", value.v_int, "right-margin-set", TRUE, NULL);
593 else if( !strcmp(hint, "margin-top") ) {
594 if(token != G_TOKEN_INT) {
595 g_scanner_error(scanner, "CSS Error: integer expected");
598 g_object_set(current_tag, "pixels-above-lines", value.v_int, "pixels-above-lines-set", TRUE, NULL);
600 else if( !strcmp(hint, "margin-bottom") ) {
601 if(token != G_TOKEN_INT) {
602 g_scanner_error(scanner, "CSS Error: integer expected");
605 g_object_set(current_tag, "pixels-below-lines", value.v_int, "pixels-below-lines-set", TRUE, NULL);
609 g_scanner_error(scanner, "CSS Error: invalid style hint %s", hint);
613 if( !style_accept(scanner, ';') )
619 /* Internal function: parses a glk color to a #hex-value */
621 glkcolor_to_hex(glui32 val, gchar *buffer)
623 g_return_if_fail(buffer != NULL);
625 sprintf(buffer, "#%02X%02X%02X",
626 ((val & 0xff0000) >> 16),
627 ((val & 0x00ff00) >> 8),
632 /* Internal function: parses a glk color to a GdkColor */
634 glkcolor_to_gdkcolor(glui32 val, GdkColor *color)
636 color->red = 256 * ((val & 0xff0000) >> 16);
637 color->green = 256 * ((val & 0x00ff00) >> 8);
638 color->blue = 256 * (val & 0x0000ff);
641 /* Internal function: parses a GdkColor to a glk color */
643 gdkcolor_to_glkcolor(GdkColor *color)
645 g_return_val_if_fail(color != NULL, 0);
646 return (glui32) color->pixel;
649 /* Internal function: changes a GTK tag to correspond with the given style. */
651 apply_stylehint_to_tag(GtkTextTag *tag, GtkTextTag *default_tag, glui32 wintype, glui32 hint, glsi32 val)
653 g_return_if_fail(tag != NULL);
655 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
656 GObject *tag_object = G_OBJECT(tag);
658 gint reverse_color = GPOINTER_TO_INT( g_object_get_data(tag_object, "reverse-color") );
663 case stylehint_Indentation:
664 g_object_set(tag_object, "left-margin", 5*val, "left-margin-set", TRUE, NULL);
665 g_object_set(tag_object, "right-margin", 5*val, "right-margin-set", TRUE, NULL);
668 case stylehint_ParaIndentation:
669 g_object_set(tag_object, "indent", 5*val, "indent-set", TRUE, NULL);
672 case stylehint_Justification:
674 case stylehint_just_LeftFlush: i = GTK_JUSTIFY_LEFT; break;
675 case stylehint_just_LeftRight: i = GTK_JUSTIFY_FILL; break;
676 case stylehint_just_Centered: i = GTK_JUSTIFY_CENTER; break;
677 case stylehint_just_RightFlush: i = GTK_JUSTIFY_RIGHT; break;
679 WARNING("Unknown justification");
680 i = GTK_JUSTIFY_LEFT;
682 g_object_set(tag_object, "justification", i, "justification-set", TRUE, NULL);
685 case stylehint_Weight:
687 case -1: i = PANGO_WEIGHT_LIGHT; break;
688 case 0: i = PANGO_WEIGHT_NORMAL; break;
689 case 1: i = PANGO_WEIGHT_BOLD; break;
690 default: WARNING("Unknown font weight");
692 g_object_set(tag_object, "weight", i, "weight-set", TRUE, NULL);
696 g_object_set(tag_object, "size", 14+(2*val), "size-set", TRUE, NULL);
699 case stylehint_Oblique:
700 g_object_set(tag_object, "style", val ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL, "style-set", TRUE, NULL);
703 case stylehint_Proportional:
706 GtkTextTag *font_tag = g_hash_table_lookup(
707 wintype == wintype_TextBuffer? glk_data->styles->text_buffer : glk_data->styles->text_grid,
708 val? "normal" : "preformatted");
709 g_object_get(font_tag, "family", &font_family, NULL);
710 g_object_set(tag_object, "family", font_family, "family-set", TRUE, NULL);
715 case stylehint_TextColor:
716 glkcolor_to_hex(val, color);
719 g_object_set(tag_object, "foreground", color, "foreground-set", TRUE, NULL);
721 g_object_set(tag_object, "background", color, "background-set", TRUE, NULL);
725 case stylehint_BackColor:
726 glkcolor_to_hex(val, color);
729 g_object_set(tag_object, "background", color, "background-set", TRUE, NULL);
731 g_object_set(tag_object, "foreground", color, "background-set", TRUE, NULL);
735 case stylehint_ReverseColor:
736 if(reverse_color != val) {
737 /* Flip the fore- and background colors */
738 GdkColor* foreground_color;
739 GdkColor* background_color;
740 gint f_set, b_set, df_set, db_set = 0;
741 g_object_get(tag_object, "foreground-set", &f_set, "background-set", &b_set, NULL);
742 g_object_get(default_tag, "foreground-set", &df_set, "background-set", &db_set, NULL);
745 g_object_get(tag_object, "foreground-gdk", &foreground_color, NULL);
747 g_object_get(default_tag, "foreground-gdk", &foreground_color, NULL);
749 g_object_get(tag_object, "background-gdk", &background_color, NULL);
751 g_object_get(default_tag, "background-gdk", &background_color, NULL);
754 g_object_set(tag_object, "foreground-gdk", background_color, NULL);
756 g_object_set(tag_object, "foreground", "#ffffff", NULL);
759 g_object_set(tag_object, "background-gdk", foreground_color, NULL);
761 g_object_set(tag_object, "background", "#000000", NULL);
763 g_object_set_data( tag_object, "reverse-color", GINT_TO_POINTER(val != 0) );
768 WARNING("Unknown style hint");
772 /* Internal function: queries a text tag for the value of a given style hint */
774 query_tag(GtkTextTag *tag, glui32 wintype, glui32 hint)
779 g_return_val_if_fail(tag != NULL, 0);
781 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
784 case stylehint_Indentation:
785 g_object_get(tag, "left_margin", &intval, NULL);
788 case stylehint_ParaIndentation:
789 g_object_get(tag, "indent", &intval, NULL);
792 case stylehint_Justification:
793 g_object_get(tag, "justification", &intval, NULL);
795 case GTK_JUSTIFY_LEFT: return stylehint_just_LeftFlush;
796 case GTK_JUSTIFY_FILL: return stylehint_just_LeftRight;
797 case GTK_JUSTIFY_CENTER: return stylehint_just_Centered;
798 case GTK_JUSTIFY_RIGHT: return stylehint_just_RightFlush;
800 WARNING("Unknown justification");
801 return stylehint_just_LeftFlush;
804 case stylehint_Weight:
805 g_object_get(tag, "weight", &intval, NULL);
807 case PANGO_WEIGHT_LIGHT: return -1;
808 case PANGO_WEIGHT_NORMAL: return 0;
809 case PANGO_WEIGHT_BOLD: return 1;
810 default: WARNING("Unknown font weight"); return 0;
814 g_object_get(tag, "size", &intval, NULL);
815 return (intval/2)-14;
817 case stylehint_Oblique:
818 g_object_get(tag, "style", &intval , NULL);
819 return intval == PANGO_STYLE_ITALIC ? 1 : 0;
821 case stylehint_Proportional:
822 /* Use pango_font_family_is_monospace()? */
824 gchar *font_family, *query_font_family;
825 GtkTextTag *font_tag = g_hash_table_lookup(
826 wintype == wintype_TextBuffer? glk_data->styles->text_buffer : glk_data->styles->text_grid,
828 g_object_get(font_tag, "family", &font_family, NULL);
829 g_object_get(tag, "family", &query_font_family, NULL);
830 gint retval = strcmp(font_family, query_font_family)? 0 : 1;
832 g_free(query_font_family);
836 case stylehint_TextColor:
837 g_object_get(tag, "foreground-gdk", &colval, NULL);
838 return gdkcolor_to_glkcolor(colval);
840 case stylehint_BackColor:
841 g_object_get(tag, "background-gdk", &colval, NULL);
842 return gdkcolor_to_glkcolor(colval);
844 case stylehint_ReverseColor:
845 return GPOINTER_TO_INT( g_object_get_data(G_OBJECT(tag), "reverse_color") );
848 WARNING("Unknown style hint");
856 * @wintype: The window type to set a style hint on, or %wintype_AllTypes.
857 * @styl: The style to set a hint for.
858 * @hint: The type of style hint, one of the <code>stylehint_</code> constants.
859 * @val: The style hint. The meaning of this depends on @hint.
861 * Sets a hint about the appearance of one style for a particular type of
862 * window. You can also set @wintype to %wintype_AllTypes, which sets a hint for
863 * all types of window.
865 * There is no equivalent constant to set a hint for all styles of a single
870 glk_stylehint_set(glui32 wintype, glui32 styl, glui32 hint, glsi32 val)
872 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
874 GtkTextTag *to_change, *default_tag;
875 if(wintype == wintype_TextBuffer || wintype == wintype_AllTypes) {
876 to_change = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) );
877 default_tag = g_hash_table_lookup( glk_data->styles->text_buffer, get_tag_name(styl) );
878 apply_stylehint_to_tag(to_change, default_tag, wintype_TextBuffer, hint, val);
881 if(wintype == wintype_TextGrid || wintype == wintype_AllTypes) {
882 to_change = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) );
883 default_tag = g_hash_table_lookup( glk_data->styles->text_grid, get_tag_name(styl) );
884 apply_stylehint_to_tag(to_change, default_tag, wintype_TextGrid, hint, val);
889 * glk_stylehint_clear:
890 * @wintype: The window type to set a style hint on, or %wintype_AllTypes.
891 * @styl: The style to set a hint for.
892 * @hint: The type of style hint, one of the <code>stylehint_</code> constants.
894 * Clears a hint about the appearance of one style for a particular type of
895 * window to its default value. You can also set @wintype to %wintype_AllTypes,
896 * which clears a hint for all types of window.
898 * There is no equivalent constant to reset a hint for all styles of a single
903 glk_stylehint_clear(glui32 wintype, glui32 styl, glui32 hint)
905 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
909 case wintype_TextBuffer:
910 tag = g_hash_table_lookup( glk_data->styles->text_buffer, get_glk_tag_name(styl) );
911 glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) );
913 case wintype_TextGrid:
914 tag = g_hash_table_lookup( glk_data->styles->text_grid, get_glk_tag_name(styl) );
915 glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) );
922 * glk_style_distinguish:
923 * @win: The window in which the styles are to be distinguished.
924 * @styl1: The first style to be distinguished from the second style.
925 * @styl2: The second style to be distinguished from the first style.
927 * Decides whether two styles are visually distinguishable in the given window.
928 * The exact meaning of this is left for the library to determine.
929 * <note><title>Chimara</title><para>
930 * Currently, all styles of one window are assumed to be mutually
934 * Returns: %TRUE (1) if the two styles are visually distinguishable. If they
935 * are not, it returns %FALSE (0).
938 glk_style_distinguish(winid_t win, glui32 styl1, glui32 styl2)
941 return styl1 != styl2;
946 * @win: The window from which to take the style.
947 * @styl: The style to perform the measurement on.
948 * @hint: The stylehint to measure.
949 * @result: Address to write the result to.
951 * Tries to test an attribute of one style in the given window @win. The library
952 * may not be able to determine the attribute; if not, this returns %FALSE (0).
953 * If it can, it returns %TRUE (1) and stores the value in the location pointed
956 * As usual, it is legal for @result to be %NULL, although fairly pointless.
959 * The meaning of the value depends on the hint which was tested:
962 * <term>%stylehint_Indentation, %stylehint_ParaIndentation</term>
963 * <listitem><para>The indentation and paragraph indentation. These are in a
964 * metric which is platform-dependent.</para>
965 * <note><para>Most likely either characters or pixels.</para></note>
969 * <term>%stylehint_Justification</term>
970 * <listitem><para>One of the constants %stylehint_just_LeftFlush,
971 * %stylehint_just_LeftRight, %stylehint_just_Centered, or
972 * %stylehint_just_RightFlush.</para></listitem>
975 * <term>%stylehint_Size</term>
976 * <listitem><para>The font size. Again, this is in a platform-dependent
978 * <note><para>Pixels, points, or simply 1 if the library does not support
979 * varying font sizes.</para></note>
983 * <term>%stylehint_Weight</term>
984 * <listitem><para>1 for heavy-weight fonts (boldface), 0 for normal weight,
985 * and -1 for light-weight fonts.</para></listitem>
988 * <term>%stylehint_Oblique</term>
989 * <listitem><para>1 for oblique fonts (italic), or 0 for normal angle.</para>
993 * <term>%stylehint_Proportional</term>
994 * <listitem><para>1 for proportional-width fonts, or 0 for fixed-width.
998 * <term>%stylehint_TextColor, %stylehint_BackColor</term>
999 * <listitem><para>These are values from 0x00000000 to 0x00FFFFFF, encoded as
1000 * described in <link
1001 * linkend="chimara-Suggesting-the-Appearance-of-Styles">Suggesting the
1002 * Appearance of Styles</link>.</para></listitem>
1005 * <term>%stylehint_ReverseColor</term>
1006 * <listitem><para>0 for normal printing, 1 if the foreground and background
1007 * colors are reversed.</para></listitem>
1011 * Returns: TRUE upon successul retrieval, otherwise FALSE.
1014 glk_style_measure(winid_t win, glui32 styl, glui32 hint, glui32 *result)
1016 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
1020 case wintype_TextBuffer:
1021 tag = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) );
1023 *result = query_tag(tag, win->type, hint);
1025 case wintype_TextGrid:
1026 tag = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) );
1028 *result = query_tag(tag, win->type, hint);
1036 /* Internal function returning the current default font for a window type
1037 * This can be used later for size calculations. Only wintype_TextGrid and wintype_TextBuffer are
1038 * supported for now */
1039 PangoFontDescription *
1040 get_current_font(guint32 wintype)
1042 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
1046 case wintype_TextGrid:
1047 normal = g_hash_table_lookup(glk_data->styles->text_grid, "normal");
1049 case wintype_TextBuffer:
1050 normal = g_hash_table_lookup(glk_data->styles->text_buffer, "normal");
1056 PangoFontDescription *font;
1057 g_object_get( G_OBJECT(normal), "font-desc", &font, NULL );
1062 /* Internal function copying the attributes of a text tag to a pango attribute list */
1064 text_tag_to_attr_list(GtkTextTag *tag, PangoAttrList *list)
1067 GdkColor *foreground, *background;
1069 PangoFontDescription *font_desc;
1070 gboolean strikethrough;
1071 PangoUnderline underline;
1073 g_object_get(tag, "foreground-set", &set, "foreground-gdk", &foreground, NULL);
1075 pango_attr_list_insert(
1077 pango_attr_foreground_new(foreground->red, foreground->green, foreground->blue)
1080 g_object_get(tag, "background-set", &set, "background-gdk", &background, NULL);
1082 pango_attr_list_insert(
1084 pango_attr_background_new(background->red, background->green, background->blue)
1087 g_object_get(tag, "language-set", &set, "language", &string, NULL);
1089 pango_attr_list_insert(
1091 pango_attr_language_new( pango_language_from_string(string) )
1095 /* Font description updates the following properties simultaniously:
1096 * family, style, weight, variant, stretch, size
1098 g_object_get(tag, "font-desc", &font_desc, NULL);
1099 pango_attr_list_insert(
1101 pango_attr_font_desc_new(font_desc)
1104 g_object_get(tag, "strikethrough-set", &set, "strikethrough", &strikethrough, NULL);
1106 pango_attr_list_insert(
1108 pango_attr_strikethrough_new(strikethrough)
1111 g_object_get(tag, "underline-set", &set, "underline", &underline, NULL);
1113 pango_attr_list_insert(
1115 pango_attr_underline_new(underline)