4 #include "chimara-glk-private.h"
11 extern GPrivate *glk_data_key;
13 static gboolean style_accept(GScanner *scanner, GTokenType token);
14 static gboolean style_accept_style_selector(GScanner *scanner, ChimaraGlk *glk);
15 static gboolean style_accept_style_hint(GScanner *scanner, GtkTextTag *current_tag);
16 static void style_add_tag_to_textbuffer(gpointer key, gpointer tag, gpointer tag_table);
17 static void style_copy_tag_to_textbuffer(gpointer key, gpointer tag, gpointer target_table);
18 static void text_tag_to_attr_list(GtkTextTag *tag, PangoAttrList *list);
19 GtkTextTag* gtk_text_tag_copy(GtkTextTag *tag);
23 * @styl: The style to apply
25 * Changes the style of the current output stream. @styl should be one of the
26 * <code>style_</code> constants. However, any value is actually legal; if the
27 * interpreter does not recognize the style value, it will treat it as
30 * This policy allows for the future definition of styles without breaking old
35 glk_set_style(glui32 styl)
37 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
38 g_return_if_fail(glk_data->current_stream != NULL);
39 glk_set_style_stream(glk_data->current_stream, styl);
42 /* The first 11 tag names must correspond to the first 11 glk tag names as defined below */
43 static const gchar* TAG_NAMES[] = {
60 /* The first 11 glk tag names must correspond to the first 11 tag names as defined above */
61 static const gchar* GLK_TAG_NAMES[] = {
81 /* Internal function: mapping from style enum to tag name */
83 get_tag_name(glui32 style)
85 if(style >= CHIMARA_NUM_STYLES) {
86 WARNING("Unsupported style");
89 return (gchar*) TAG_NAMES[style];
93 /* Internal function: mapping from glk style enum to tag name */
95 get_glk_tag_name(glui32 style)
97 if(style >= style_NUMSTYLES) {
98 WARNING("Unsupported style");
101 return (gchar*) GLK_TAG_NAMES[style];
106 * glk_set_style_stream:
107 * @str: Output stream to change the style of
108 * @styl: The style to apply
110 * This changes the style of the stream @str. See glk_set_style().
113 glk_set_style_stream(strid_t str, glui32 styl) {
114 if(str->window == NULL)
117 flush_window_buffer(str->window);
118 str->style = (gchar*) get_tag_name(styl);
119 str->glk_style = (gchar*) get_glk_tag_name(styl);
122 /* Internal function: call this to initialize the layout of the 'more' prompt. */
124 style_init_more_prompt(winid_t win)
126 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
128 win->pager_layout = gtk_widget_create_pango_layout(win->widget, "More");
129 pango_layout_set_attributes(win->pager_layout, glk_data->pager_attr_list);
132 /* Internal function: call this to initialize the default styles to a textbuffer. */
134 style_init_textbuffer(GtkTextBuffer *buffer)
136 g_return_if_fail(buffer != NULL);
138 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
140 /* Place the default text tags in the textbuffer's tag table */
141 g_hash_table_foreach(glk_data->styles->text_buffer, style_add_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
143 /* Copy the override text tags to the textbuffers's tag table */
144 g_hash_table_foreach(glk_data->glk_styles->text_buffer, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
148 /* Internal function: call this to initialize the default styles to a textgrid. */
150 style_init_textgrid(GtkTextBuffer *buffer)
152 g_return_if_fail(buffer != NULL);
154 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
156 /* Place the default text tags in the textbuffer's tag table */
157 g_hash_table_foreach(glk_data->styles->text_grid, style_add_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
159 /* Copy the current text tags to the textbuffers's tag table */
160 g_hash_table_foreach(glk_data->glk_styles->text_grid, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
163 /* Internal function used to iterate over the default text tag table, applying them to a textbuffer */
165 style_add_tag_to_textbuffer(gpointer key, gpointer tag, gpointer tag_table)
167 g_return_if_fail(key != NULL);
168 g_return_if_fail(tag != NULL);
169 g_return_if_fail(tag_table != NULL);
171 gtk_text_tag_table_add(tag_table, tag);
174 /* Internal function used to iterate over a style table, copying it */
176 style_copy_tag_to_textbuffer(gpointer key, gpointer tag, gpointer target_table)
178 g_return_if_fail(key != NULL);
179 g_return_if_fail(tag != NULL);
180 g_return_if_fail(target_table != NULL);
182 gtk_text_tag_table_add(target_table, gtk_text_tag_copy( GTK_TEXT_TAG(tag) ));
185 /* Internal function that copies a text tag */
187 gtk_text_tag_copy(GtkTextTag *tag)
191 g_return_val_if_fail(tag != NULL, NULL);
193 copy = gtk_text_tag_new(tag->name);
194 gtk_text_attributes_copy_values(tag->values, copy->values);
196 #define _COPY_FLAG(flag) copy->flag = tag->flag
197 _COPY_FLAG (bg_color_set);
198 _COPY_FLAG (bg_color_set);
199 _COPY_FLAG (bg_stipple_set);
200 _COPY_FLAG (fg_color_set);
201 _COPY_FLAG (fg_stipple_set);
202 _COPY_FLAG (justification_set);
203 _COPY_FLAG (left_margin_set);
204 _COPY_FLAG (indent_set);
205 _COPY_FLAG (rise_set);
206 _COPY_FLAG (strikethrough_set);
207 _COPY_FLAG (right_margin_set);
208 _COPY_FLAG (pixels_above_lines_set);
209 _COPY_FLAG (pixels_below_lines_set);
210 _COPY_FLAG (pixels_inside_wrap_set);
211 _COPY_FLAG (tabs_set);
212 _COPY_FLAG (underline_set);
213 _COPY_FLAG (wrap_mode_set);
214 _COPY_FLAG (bg_full_height_set);
215 _COPY_FLAG (invisible_set);
216 _COPY_FLAG (editable_set);
217 _COPY_FLAG (language_set);
218 _COPY_FLAG (scale_set);
221 /* Copy the data that was added manually */
222 gpointer reverse_color = g_object_get_data( G_OBJECT(tag), "reverse_color" );
225 g_object_set_data( G_OBJECT(copy), "reverse_color", reverse_color );
230 /* Internal function that constructs the default styles */
232 style_init(ChimaraGlk *glk)
234 CHIMARA_GLK_USE_PRIVATE(glk, priv);
236 GHashTable *default_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
237 GHashTable *default_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
238 GHashTable *glk_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
239 GHashTable *glk_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
242 PangoFontDescription *default_font_desc = pango_font_description_from_string("Serif");
243 PangoFontDescription *monospace_font_desc = pango_font_description_from_string("Monospace");
245 /* Initialise the default styles for a text grid */
246 tag = gtk_text_tag_new("default");
247 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
248 g_hash_table_insert(default_text_grid_styles, "default", tag);
250 tag = gtk_text_tag_new("normal");
251 //g_object_set(tag, "font-desc", monospace_font_desc, NULL);
252 g_hash_table_insert(default_text_grid_styles, "normal", tag);
254 tag = gtk_text_tag_new("emphasized");
255 //g_object_set(tag, "font-desc", monospace_font_desc, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
256 g_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
257 g_hash_table_insert(default_text_grid_styles, "emphasized", tag);
259 tag = gtk_text_tag_new("preformatted");
260 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
261 g_hash_table_insert(default_text_grid_styles, "preformatted", tag);
263 tag = gtk_text_tag_new("header");
264 //g_object_set(tag, "font-desc", monospace_font_desc, "weight", PANGO_WEIGHT_BOLD, NULL);
265 g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, NULL);
266 g_hash_table_insert(default_text_grid_styles, "header", tag);
268 tag = gtk_text_tag_new("subheader");
269 //g_object_set(tag, "font-desc", monospace_font_desc, "weight", PANGO_WEIGHT_BOLD, NULL);
270 g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, NULL);
271 g_hash_table_insert(default_text_grid_styles, "subheader", tag);
273 tag = gtk_text_tag_new("alert");
274 //g_object_set(tag, "font-desc", monospace_font_desc, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
275 g_object_set(tag, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
276 g_hash_table_insert(default_text_grid_styles, "alert", tag);
278 tag = gtk_text_tag_new("note");
279 //g_object_set(tag, "font-desc", monospace_font_desc, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
280 g_object_set(tag, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
281 g_hash_table_insert(default_text_grid_styles, "note", tag);
283 tag = gtk_text_tag_new("block-quote");
284 //g_object_set(tag, "font-desc", monospace_font_desc, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
285 g_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
286 g_hash_table_insert(default_text_grid_styles, "block-quote", tag);
288 tag = gtk_text_tag_new("input");
289 //g_object_set(tag, "font-desc", monospace_font_desc, NULL);
290 g_hash_table_insert(default_text_grid_styles, "input", tag);
292 tag = gtk_text_tag_new("user1");
293 //g_object_set(tag, "font-desc", monospace_font_desc, NULL);
294 g_hash_table_insert(default_text_grid_styles, "user1", tag);
296 tag = gtk_text_tag_new("user2");
297 //g_object_set(tag, "font-desc", monospace_font_desc, NULL);
298 g_hash_table_insert(default_text_grid_styles, "user2", tag);
300 tag = gtk_text_tag_new("hyperlink");
301 g_object_set(tag, "foreground", "#0000ff", "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
302 g_hash_table_insert(default_text_grid_styles, "hyperlink", tag);
304 /* Initialise the default styles for a text buffer */
305 tag = gtk_text_tag_new("default");
306 g_object_set(tag, "font-desc", default_font_desc, NULL);
307 g_hash_table_insert(default_text_buffer_styles, "default", tag);
309 tag = gtk_text_tag_new("normal");
310 //g_object_set(tag, "font-desc", default_font_desc, NULL);
311 g_hash_table_insert(default_text_buffer_styles, "normal", tag);
313 tag = gtk_text_tag_new("emphasized");
314 //g_object_set(tag, "font-desc", default_font_desc, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
315 g_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
316 g_hash_table_insert(default_text_buffer_styles, "emphasized", tag);
318 tag = gtk_text_tag_new("preformatted");
319 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
320 g_hash_table_insert(default_text_buffer_styles, "preformatted", tag);
322 tag = gtk_text_tag_new("header");
323 //g_object_set(tag, "font-desc", default_font_desc, "size-points", 18.0, "weight", PANGO_WEIGHT_BOLD, NULL);
324 g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, NULL);
325 g_hash_table_insert(default_text_buffer_styles, "header", tag);
327 tag = gtk_text_tag_new("subheader");
328 //g_object_set(tag, "font-desc", default_font_desc, "size-points", 14.0, "weight", PANGO_WEIGHT_BOLD, NULL);
329 g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, NULL);
330 g_hash_table_insert(default_text_buffer_styles, "subheader", tag);
332 tag = gtk_text_tag_new("alert");
333 //g_object_set(tag, "font-desc", default_font_desc, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
334 g_object_set(tag, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
335 g_hash_table_insert(default_text_buffer_styles, "alert", tag);
337 tag = gtk_text_tag_new("note");
338 //g_object_set(tag, "font-desc", default_font_desc, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
339 g_object_set(tag, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
340 g_hash_table_insert(default_text_buffer_styles, "note", tag);
342 tag = gtk_text_tag_new("block-quote");
343 //g_object_set(tag, "font-desc", default_font_desc, "justification", GTK_JUSTIFY_CENTER, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
344 g_object_set(tag, "justification", GTK_JUSTIFY_CENTER, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
345 g_hash_table_insert(default_text_buffer_styles, "block-quote", tag);
347 tag = gtk_text_tag_new("input");
348 //g_object_set(tag, "font-desc", default_font_desc, NULL);
349 g_hash_table_insert(default_text_buffer_styles, "input", tag);
351 tag = gtk_text_tag_new("user1");
352 //g_object_set(tag, "font-desc", default_font_desc, NULL);
353 g_hash_table_insert(default_text_buffer_styles, "user1", tag);
355 tag = gtk_text_tag_new("user2");
356 //g_object_set(tag, "font-desc", default_font_desc, NULL);
357 g_hash_table_insert(default_text_buffer_styles, "user2", tag);
359 tag = gtk_text_tag_new("hyperlink");
360 //g_object_set(tag, "font-desc", default_font_desc, "foreground", "#0000ff", "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
361 g_object_set(tag, "foreground", "#0000ff", "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
362 g_hash_table_insert(default_text_buffer_styles, "hyperlink", tag);
364 GtkTextTag *pager_tag = gtk_text_tag_new("pager");
365 g_object_set(pager_tag, "font-desc", default_font_desc, "foreground", "#ffffff", "background", "#000000", NULL);
366 g_hash_table_insert(default_text_buffer_styles, "pager", pager_tag);
367 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);
369 pango_font_description_free(default_font_desc);
370 pango_font_description_free(monospace_font_desc);
372 priv->styles->text_grid = default_text_grid_styles;
373 priv->styles->text_buffer = default_text_buffer_styles;
376 /* Initialize the GLK styles to empty tags */
378 for(i=0; i<style_NUMSTYLES; i++) {
379 tag = gtk_text_tag_new(GLK_TAG_NAMES[i]);
380 g_hash_table_insert(glk_text_grid_styles, (gchar*) GLK_TAG_NAMES[i], tag);
381 tag = gtk_text_tag_new(GLK_TAG_NAMES[i]);
382 g_hash_table_insert(glk_text_buffer_styles, (gchar*) GLK_TAG_NAMES[i], tag);
385 priv->glk_styles->text_grid = glk_text_grid_styles;
386 priv->glk_styles->text_buffer = glk_text_buffer_styles;
390 /* Reset style tables to the library's internal defaults */
392 reset_default_styles(ChimaraGlk *glk)
394 /* TODO: write this function */
397 /* Copy the default styles to the current styles
398 FIXME: This function is temporary and will not be needed later on */
400 copy_default_styles_to_current_styles(ChimaraGlk *glk)
403 CHIMARA_GLK_USE_PRIVATE(glk, priv);
404 g_hash_table_foreach(priv->styles->text_grid, style_table_copy, priv->glk_styles->text_grid);
405 g_hash_table_foreach(priv->styles->text_buffer, style_table_copy, priv->glk_styles->text_buffer);
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);
412 /* Create the CSS file scanner */
414 create_css_file_scanner(void)
416 GScanner *scanner = g_scanner_new(NULL);
417 scanner->config->cset_identifier_first = G_CSET_a_2_z G_CSET_A_2_Z "#";
418 scanner->config->cset_identifier_nth = G_CSET_a_2_z G_CSET_A_2_Z "-_" G_CSET_DIGITS;
419 scanner->config->symbol_2_token = TRUE;
420 scanner->config->cpair_comment_single = NULL;
421 scanner->config->scan_float = FALSE;
425 /* Run the scanner over the CSS file, overriding the default styles */
427 scan_css_file(GScanner *scanner, ChimaraGlk *glk)
429 CHIMARA_GLK_USE_PRIVATE(glk, priv);
431 while( g_scanner_peek_next_token(scanner) != G_TOKEN_EOF) {
432 if( !style_accept_style_selector(scanner, glk) )
436 g_scanner_destroy(scanner);
438 /* Update the pager prompt to the new style */
439 GtkTextTag *pager_tag = GTK_TEXT_TAG( g_hash_table_lookup(priv->styles->text_buffer, "pager") );
440 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);
443 /* Internal function: parses a token */
445 style_accept(GScanner *scanner, GTokenType token)
447 GTokenType next = g_scanner_get_next_token(scanner);
449 g_scanner_unexp_token(scanner, token, NULL, NULL, NULL, "CSS Error", 1);
455 /* Internal function: parses a style selector */
457 style_accept_style_selector(GScanner *scanner, ChimaraGlk *glk)
459 CHIMARA_GLK_USE_PRIVATE(glk, priv);
461 GtkTextTag *current_tag;
463 GTokenType token = g_scanner_get_next_token(scanner);
464 GTokenValue value = g_scanner_cur_value(scanner);
467 token != G_TOKEN_IDENTIFIER ||
468 ( strcmp(value.v_identifier, "buffer") && strcmp(value.v_identifier, "grid") )
470 g_scanner_error(scanner, "CSS Error: buffer/grid expected");
474 field = g_strdup(value.v_identifier);
476 /* Parse the tag name to change */
477 if( g_scanner_peek_next_token(scanner) == '{') {
478 style_accept(scanner, '{');
479 if( !strcmp(field, "buffer") )
480 current_tag = g_hash_table_lookup(priv->styles->text_buffer, "default");
482 current_tag = g_hash_table_lookup(priv->styles->text_grid, "default");
484 if( !style_accept(scanner, '.') )
487 token = g_scanner_get_next_token(scanner);
488 value = g_scanner_cur_value(scanner);
490 if(token != G_TOKEN_IDENTIFIER) {
491 g_scanner_error(scanner, "CSS Error: style selector expected");
495 if( !strcmp(field, "buffer") )
496 current_tag = g_hash_table_lookup(priv->styles->text_buffer, value.v_identifier);
498 current_tag = g_hash_table_lookup(priv->styles->text_grid, value.v_identifier);
500 if(current_tag == NULL) {
501 g_scanner_error(scanner, "CSS Error: invalid style identifier");
505 if( !style_accept(scanner, '{') )
509 while( g_scanner_peek_next_token(scanner) != '}') {
510 if( !style_accept_style_hint(scanner, current_tag) )
514 if( !style_accept(scanner, '}') )
520 /* Internal function: parses a style hint */
522 style_accept_style_hint(GScanner *scanner, GtkTextTag *current_tag)
524 GTokenType token = g_scanner_get_next_token(scanner);
525 GTokenValue value = g_scanner_cur_value(scanner);
528 if(token != G_TOKEN_IDENTIFIER) {
529 g_scanner_error(scanner, "CSS Error: style hint expected");
533 hint = g_strdup(value.v_identifier);
535 if( !style_accept(scanner, ':') )
538 token = g_scanner_get_next_token(scanner);
539 value = g_scanner_cur_value(scanner);
541 if( !strcmp(hint, "font-family") ) {
542 if(token != G_TOKEN_STRING) {
543 g_scanner_error(scanner, "CSS Error: string expected");
546 g_object_set(current_tag, "family", value.v_string, "family-set", TRUE, NULL);
548 else if( !strcmp(hint, "font-weight") ) {
549 if(token != G_TOKEN_IDENTIFIER) {
550 g_scanner_error(scanner, "CSS Error: bold/normal expected");
554 if( !strcmp(value.v_identifier, "bold") )
555 g_object_set(current_tag, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL);
556 else if( !strcmp(value.v_identifier, "normal") )
557 g_object_set(current_tag, "weight", PANGO_WEIGHT_NORMAL, "weight-set", TRUE, NULL);
559 g_scanner_error(scanner, "CSS Error: bold/normal expected");
563 else if( !strcmp(hint, "font-style") ) {
564 if(token != G_TOKEN_IDENTIFIER) {
565 g_scanner_error(scanner, "CSS Error: italic/normal expected");
569 if( !strcmp(value.v_identifier, "italic") )
570 g_object_set(current_tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
571 else if( !strcmp(value.v_identifier, "normal") )
572 g_object_set(current_tag, "style", PANGO_STYLE_NORMAL, "style-set", TRUE, NULL);
574 g_scanner_error(scanner, "CSS Error: italic/normal expected");
578 else if( !strcmp(hint, "font-size") ) {
579 if(token == G_TOKEN_INT)
580 g_object_set(current_tag, "size-points", (float)value.v_int, "size-set", TRUE, NULL);
581 else if(token == G_TOKEN_FLOAT)
582 g_object_set(current_tag, "size-points", value.v_float, "size-set", TRUE, NULL);
584 g_scanner_error(scanner, "CSS Error: integer or float expected");
588 else if( !strcmp(hint, "color") ) {
589 if(token != G_TOKEN_IDENTIFIER) {
590 g_scanner_error(scanner, "CSS Error: hex color expected");
594 g_object_set(current_tag, "foreground", value.v_identifier, "foreground-set", TRUE, NULL);
596 else if( !strcmp(hint, "background-color") ) {
597 if(token != G_TOKEN_IDENTIFIER) {
598 g_scanner_error(scanner, "CSS Error: hex color expected");
601 g_object_set(current_tag, "background", value.v_identifier, "background-set", TRUE, NULL);
603 else if( !strcmp(hint, "text-align") ) {
604 if(token != G_TOKEN_IDENTIFIER) {
605 g_scanner_error(scanner, "CSS Error: left/right/center expected");
609 if( !strcmp(value.v_identifier, "left") )
610 g_object_set(current_tag, "justification", GTK_JUSTIFY_LEFT, "justification-set", TRUE, NULL);
611 else if( !strcmp(value.v_identifier, "right") )
612 g_object_set(current_tag, "justification", GTK_JUSTIFY_RIGHT, "justification-set", TRUE, NULL);
613 else if( !strcmp(value.v_identifier, "center") )
614 g_object_set(current_tag, "justification", GTK_JUSTIFY_CENTER, "justification-set", TRUE, NULL);
616 g_scanner_error(scanner, "CSS Error: left/right/center expected");
620 else if( !strcmp(hint, "margin-left") ) {
621 if(token != G_TOKEN_INT) {
622 g_scanner_error(scanner, "CSS Error: integer expected");
625 g_object_set(current_tag, "left-margin", value.v_int, "left-margin-set", TRUE, NULL);
627 else if( !strcmp(hint, "margin-right") ) {
628 if(token != G_TOKEN_INT) {
629 g_scanner_error(scanner, "CSS Error: integer expected");
632 g_object_set(current_tag, "right-margin", value.v_int, "right-margin-set", TRUE, NULL);
634 else if( !strcmp(hint, "margin-top") ) {
635 if(token != G_TOKEN_INT) {
636 g_scanner_error(scanner, "CSS Error: integer expected");
639 g_object_set(current_tag, "pixels-above-lines", value.v_int, "pixels-above-lines-set", TRUE, NULL);
641 else if( !strcmp(hint, "margin-bottom") ) {
642 if(token != G_TOKEN_INT) {
643 g_scanner_error(scanner, "CSS Error: integer expected");
646 g_object_set(current_tag, "pixels-below-lines", value.v_int, "pixels-below-lines-set", TRUE, NULL);
650 g_scanner_error(scanner, "CSS Error: invalid style hint %s", hint);
654 if( !style_accept(scanner, ';') )
660 /* Internal function: parses a glk color to a #hex-value */
662 glkcolor_to_hex(glui32 val, gchar *buffer)
664 g_return_if_fail(buffer != NULL);
666 sprintf(buffer, "#%02X%02X%02X",
667 ((val & 0xff0000) >> 16),
668 ((val & 0x00ff00) >> 8),
673 /* Internal function: parses a glk color to a GdkColor */
675 glkcolor_to_gdkcolor(glui32 val, GdkColor *color)
677 color->red = 256 * ((val & 0xff0000) >> 16);
678 color->green = 256 * ((val & 0x00ff00) >> 8);
679 color->blue = 256 * (val & 0x0000ff);
682 /* Internal function: parses a GdkColor to a glk color */
684 gdkcolor_to_glkcolor(GdkColor *color)
686 g_return_val_if_fail(color != NULL, 0);
687 return (glui32) color->pixel;
690 /* Internal function: changes a GTK tag to correspond with the given style. */
692 apply_stylehint_to_tag(GtkTextTag *tag, GtkTextTag *default_tag, glui32 wintype, glui32 hint, glsi32 val)
694 g_return_if_fail(tag != NULL);
696 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
697 GObject *tag_object = G_OBJECT(tag);
699 gint reverse_color = GPOINTER_TO_INT( g_object_get_data(tag_object, "reverse-color") );
704 case stylehint_Indentation:
705 g_object_set(tag_object, "left-margin", 5*val, "left-margin-set", TRUE, NULL);
706 g_object_set(tag_object, "right-margin", 5*val, "right-margin-set", TRUE, NULL);
709 case stylehint_ParaIndentation:
710 g_object_set(tag_object, "indent", 5*val, "indent-set", TRUE, NULL);
713 case stylehint_Justification:
715 case stylehint_just_LeftFlush: i = GTK_JUSTIFY_LEFT; break;
716 case stylehint_just_LeftRight: i = GTK_JUSTIFY_FILL; break;
717 case stylehint_just_Centered: i = GTK_JUSTIFY_CENTER; break;
718 case stylehint_just_RightFlush: i = GTK_JUSTIFY_RIGHT; break;
720 WARNING("Unknown justification");
721 i = GTK_JUSTIFY_LEFT;
723 g_object_set(tag_object, "justification", i, "justification-set", TRUE, NULL);
726 case stylehint_Weight:
728 case -1: i = PANGO_WEIGHT_LIGHT; break;
729 case 0: i = PANGO_WEIGHT_NORMAL; break;
730 case 1: i = PANGO_WEIGHT_BOLD; break;
731 default: WARNING("Unknown font weight");
733 g_object_set(tag_object, "weight", i, "weight-set", TRUE, NULL);
738 gdouble scale = PANGO_SCALE_MEDIUM;
740 case -3: scale = PANGO_SCALE_XX_SMALL; break;
741 case -2: scale = PANGO_SCALE_X_SMALL; break;
742 case -1: scale = PANGO_SCALE_SMALL; break;
743 case 0: scale = PANGO_SCALE_MEDIUM; break;
744 case 1: scale = PANGO_SCALE_LARGE; break;
745 case 2: scale = PANGO_SCALE_X_LARGE; break;
746 case 3: scale = PANGO_SCALE_XX_LARGE; break;
748 /* We follow Pango's convention of having each magnification
749 step be a scaling of 1.2 */
750 scale = pow(1.2, (double)val);
752 g_printerr("Setting tag to %f\n", scale);
753 g_object_set(tag_object, "scale", scale, "scale-set", TRUE, NULL);
757 case stylehint_Oblique:
758 g_object_set(tag_object, "style", val ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL, "style-set", TRUE, NULL);
761 case stylehint_Proportional:
764 GtkTextTag *font_tag = g_hash_table_lookup(
765 wintype == wintype_TextBuffer? glk_data->styles->text_buffer : glk_data->styles->text_grid,
766 val? "normal" : "preformatted");
767 g_object_get(font_tag, "family", &font_family, NULL);
768 g_object_set(tag_object, "family", font_family, "family-set", TRUE, NULL);
773 case stylehint_TextColor:
774 glkcolor_to_hex(val, color);
777 g_object_set(tag_object, "foreground", color, "foreground-set", TRUE, NULL);
779 g_object_set(tag_object, "background", color, "background-set", TRUE, NULL);
783 case stylehint_BackColor:
784 glkcolor_to_hex(val, color);
787 g_object_set(tag_object, "background", color, "background-set", TRUE, NULL);
789 g_object_set(tag_object, "foreground", color, "background-set", TRUE, NULL);
793 case stylehint_ReverseColor:
794 if(reverse_color != val) {
795 /* Flip the fore- and background colors */
796 GdkColor* foreground_color;
797 GdkColor* background_color;
798 gint f_set, b_set, df_set, db_set = 0;
799 g_object_get(tag_object, "foreground-set", &f_set, "background-set", &b_set, NULL);
800 g_object_get(default_tag, "foreground-set", &df_set, "background-set", &db_set, NULL);
803 g_object_get(tag_object, "foreground-gdk", &foreground_color, NULL);
805 g_object_get(default_tag, "foreground-gdk", &foreground_color, NULL);
807 g_object_get(tag_object, "background-gdk", &background_color, NULL);
809 g_object_get(default_tag, "background-gdk", &background_color, NULL);
812 g_object_set(tag_object, "foreground-gdk", background_color, NULL);
814 g_object_set(tag_object, "foreground", "#ffffff", NULL);
817 g_object_set(tag_object, "background-gdk", foreground_color, NULL);
819 g_object_set(tag_object, "background", "#000000", NULL);
821 g_object_set_data( tag_object, "reverse-color", GINT_TO_POINTER(val != 0) );
826 WARNING("Unknown style hint");
830 /* Internal function: queries a text tag for the value of a given style hint */
832 query_tag(GtkTextTag *tag, glui32 wintype, glui32 hint)
838 g_return_val_if_fail(tag != NULL, 0);
840 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
843 case stylehint_Indentation:
844 g_object_get(tag, "left_margin", &intval, NULL);
847 case stylehint_ParaIndentation:
848 g_object_get(tag, "indent", &intval, NULL);
851 case stylehint_Justification:
852 g_object_get(tag, "justification", &intval, NULL);
854 case GTK_JUSTIFY_LEFT: return stylehint_just_LeftFlush;
855 case GTK_JUSTIFY_FILL: return stylehint_just_LeftRight;
856 case GTK_JUSTIFY_CENTER: return stylehint_just_Centered;
857 case GTK_JUSTIFY_RIGHT: return stylehint_just_RightFlush;
859 WARNING("Unknown justification");
860 return stylehint_just_LeftFlush;
863 case stylehint_Weight:
864 g_object_get(tag, "weight", &intval, NULL);
866 case PANGO_WEIGHT_LIGHT: return -1;
867 case PANGO_WEIGHT_NORMAL: return 0;
868 case PANGO_WEIGHT_BOLD: return 1;
869 default: WARNING("Unknown font weight"); return 0;
873 g_object_get(tag, "scale", &doubleval, NULL);
874 return (gint)round(log(doubleval) / log(1.2));
876 case stylehint_Oblique:
877 g_object_get(tag, "style", &intval , NULL);
878 return intval == PANGO_STYLE_ITALIC ? 1 : 0;
880 case stylehint_Proportional:
881 /* Use pango_font_family_is_monospace()? */
883 gchar *font_family, *query_font_family;
884 GtkTextTag *font_tag = g_hash_table_lookup(
885 wintype == wintype_TextBuffer? glk_data->styles->text_buffer : glk_data->styles->text_grid,
887 g_object_get(font_tag, "family", &font_family, NULL);
888 g_object_get(tag, "family", &query_font_family, NULL);
889 gint retval = strcmp(font_family, query_font_family)? 0 : 1;
891 g_free(query_font_family);
895 case stylehint_TextColor:
896 g_object_get(tag, "foreground-gdk", &colval, NULL);
897 return gdkcolor_to_glkcolor(colval);
899 case stylehint_BackColor:
900 g_object_get(tag, "background-gdk", &colval, NULL);
901 return gdkcolor_to_glkcolor(colval);
903 case stylehint_ReverseColor:
904 return GPOINTER_TO_INT( g_object_get_data(G_OBJECT(tag), "reverse_color") );
907 WARNING("Unknown style hint");
915 * @wintype: The window type to set a style hint on, or %wintype_AllTypes.
916 * @styl: The style to set a hint for.
917 * @hint: The type of style hint, one of the <code>stylehint_</code> constants.
918 * @val: The style hint. The meaning of this depends on @hint.
920 * Sets a hint about the appearance of one style for a particular type of
921 * window. You can also set @wintype to %wintype_AllTypes, which sets a hint for
922 * all types of window.
924 * There is no equivalent constant to set a hint for all styles of a single
929 glk_stylehint_set(glui32 wintype, glui32 styl, glui32 hint, glsi32 val)
931 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
933 GtkTextTag *to_change, *default_tag;
934 if(wintype == wintype_TextBuffer || wintype == wintype_AllTypes) {
935 to_change = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) );
936 default_tag = g_hash_table_lookup( glk_data->styles->text_buffer, get_tag_name(styl) );
937 apply_stylehint_to_tag(to_change, default_tag, wintype_TextBuffer, hint, val);
940 if(wintype == wintype_TextGrid || wintype == wintype_AllTypes) {
941 to_change = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) );
942 default_tag = g_hash_table_lookup( glk_data->styles->text_grid, get_tag_name(styl) );
943 apply_stylehint_to_tag(to_change, default_tag, wintype_TextGrid, hint, val);
948 * glk_stylehint_clear:
949 * @wintype: The window type to set a style hint on, or %wintype_AllTypes.
950 * @styl: The style to set a hint for.
951 * @hint: The type of style hint, one of the <code>stylehint_</code> constants.
953 * Clears a hint about the appearance of one style for a particular type of
954 * window to its default value. You can also set @wintype to %wintype_AllTypes,
955 * which clears a hint for all types of window.
957 * There is no equivalent constant to reset a hint for all styles of a single
962 glk_stylehint_clear(glui32 wintype, glui32 styl, glui32 hint)
964 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
968 case wintype_TextBuffer:
969 tag = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) );
971 glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) );
974 case wintype_TextGrid:
975 tag = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) );
977 glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) );
985 * glk_style_distinguish:
986 * @win: The window in which the styles are to be distinguished.
987 * @styl1: The first style to be distinguished from the second style.
988 * @styl2: The second style to be distinguished from the first style.
990 * Decides whether two styles are visually distinguishable in the given window.
991 * The exact meaning of this is left for the library to determine.
992 * <note><title>Chimara</title><para>
993 * Currently, all styles of one window are assumed to be mutually
997 * Returns: %TRUE (1) if the two styles are visually distinguishable. If they
998 * are not, it returns %FALSE (0).
1001 glk_style_distinguish(winid_t win, glui32 styl1, glui32 styl2)
1004 return styl1 != styl2;
1008 * glk_style_measure:
1009 * @win: The window from which to take the style.
1010 * @styl: The style to perform the measurement on.
1011 * @hint: The stylehint to measure.
1012 * @result: Address to write the result to.
1014 * Tries to test an attribute of one style in the given window @win. The library
1015 * may not be able to determine the attribute; if not, this returns %FALSE (0).
1016 * If it can, it returns %TRUE (1) and stores the value in the location pointed
1019 * As usual, it is legal for @result to be %NULL, although fairly pointless.
1022 * The meaning of the value depends on the hint which was tested:
1025 * <term>%stylehint_Indentation, %stylehint_ParaIndentation</term>
1026 * <listitem><para>The indentation and paragraph indentation. These are in a
1027 * metric which is platform-dependent.</para>
1028 * <note><para>Most likely either characters or pixels.</para></note>
1032 * <term>%stylehint_Justification</term>
1033 * <listitem><para>One of the constants %stylehint_just_LeftFlush,
1034 * %stylehint_just_LeftRight, %stylehint_just_Centered, or
1035 * %stylehint_just_RightFlush.</para></listitem>
1038 * <term>%stylehint_Size</term>
1039 * <listitem><para>The font size. Again, this is in a platform-dependent
1041 * <note><para>Pixels, points, or simply 1 if the library does not support
1042 * varying font sizes.</para></note>
1046 * <term>%stylehint_Weight</term>
1047 * <listitem><para>1 for heavy-weight fonts (boldface), 0 for normal weight,
1048 * and -1 for light-weight fonts.</para></listitem>
1051 * <term>%stylehint_Oblique</term>
1052 * <listitem><para>1 for oblique fonts (italic), or 0 for normal angle.</para>
1056 * <term>%stylehint_Proportional</term>
1057 * <listitem><para>1 for proportional-width fonts, or 0 for fixed-width.
1058 * </para></listitem>
1061 * <term>%stylehint_TextColor, %stylehint_BackColor</term>
1062 * <listitem><para>These are values from 0x00000000 to 0x00FFFFFF, encoded as
1063 * described in <link
1064 * linkend="chimara-Suggesting-the-Appearance-of-Styles">Suggesting the
1065 * Appearance of Styles</link>.</para></listitem>
1068 * <term>%stylehint_ReverseColor</term>
1069 * <listitem><para>0 for normal printing, 1 if the foreground and background
1070 * colors are reversed.</para></listitem>
1074 * Returns: TRUE upon successul retrieval, otherwise FALSE.
1077 glk_style_measure(winid_t win, glui32 styl, glui32 hint, glui32 *result)
1079 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
1083 case wintype_TextBuffer:
1084 tag = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) );
1086 *result = query_tag(tag, win->type, hint);
1088 case wintype_TextGrid:
1089 tag = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) );
1091 *result = query_tag(tag, win->type, hint);
1099 /* Internal function returning the current default font for a window type
1100 * This can be used later for size calculations. Only wintype_TextGrid and wintype_TextBuffer are
1101 * supported for now */
1102 PangoFontDescription *
1103 get_current_font(guint32 wintype)
1105 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
1109 case wintype_TextGrid:
1110 tag = g_hash_table_lookup(glk_data->styles->text_grid, "default");
1112 case wintype_TextBuffer:
1113 tag = g_hash_table_lookup(glk_data->styles->text_buffer, "default");
1119 PangoFontDescription *font;
1120 g_object_get( G_OBJECT(tag), "font-desc", &font, NULL );
1125 /* Internal function copying the attributes of a text tag to a pango attribute list */
1127 text_tag_to_attr_list(GtkTextTag *tag, PangoAttrList *list)
1130 GdkColor *foreground, *background;
1132 PangoFontDescription *font_desc;
1133 gboolean strikethrough;
1134 PangoUnderline underline;
1136 g_object_get(tag, "foreground-set", &set, "foreground-gdk", &foreground, NULL);
1138 pango_attr_list_insert(
1140 pango_attr_foreground_new(foreground->red, foreground->green, foreground->blue)
1143 g_object_get(tag, "background-set", &set, "background-gdk", &background, NULL);
1145 pango_attr_list_insert(
1147 pango_attr_background_new(background->red, background->green, background->blue)
1150 g_object_get(tag, "language-set", &set, "language", &string, NULL);
1152 pango_attr_list_insert(
1154 pango_attr_language_new( pango_language_from_string(string) )
1158 /* Font description updates the following properties simultaniously:
1159 * family, style, weight, variant, stretch, size
1161 g_object_get(tag, "font-desc", &font_desc, NULL);
1162 pango_attr_list_insert(
1164 pango_attr_font_desc_new(font_desc)
1167 g_object_get(tag, "strikethrough-set", &set, "strikethrough", &strikethrough, NULL);
1169 pango_attr_list_insert(
1171 pango_attr_strikethrough_new(strikethrough)
1174 g_object_get(tag, "underline-set", &set, "underline", &underline, NULL);
1176 pango_attr_list_insert(
1178 pango_attr_underline_new(underline)
1183 /* Update pager and reverse video tags */
1185 style_update(ChimaraGlk *glk)
1187 CHIMARA_GLK_USE_PRIVATE(glk, priv);
1189 GtkTextTag *pager_tag = GTK_TEXT_TAG( g_hash_table_lookup(priv->styles->text_buffer, "pager") );
1190 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);