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_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);
19 static void style_cascade_colors(GtkTextTag *tag, GtkTextTag *glk_tag, GtkTextTag *default_tag, GdkColor **foreground, GdkColor **background);
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) {
115 g_printf("glk_set_style(str->rock=%d, styl=%d)\n", str->rock, styl);
118 if(str->window == NULL)
121 flush_window_buffer(str->window);
122 str->style = (gchar*) get_tag_name(styl);
123 str->glk_style = (gchar*) get_glk_tag_name(styl);
126 /* Internal function: call this to initialize the layout of the 'more' prompt. */
128 style_init_more_prompt(winid_t win)
130 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
132 win->pager_layout = gtk_widget_create_pango_layout(win->widget, "More");
133 pango_layout_set_attributes(win->pager_layout, glk_data->pager_attr_list);
136 /* Internal function: call this to initialize the default styles to a textbuffer. */
138 style_init_textbuffer(GtkTextBuffer *buffer)
140 g_return_if_fail(buffer != NULL);
142 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
144 /* Place the default text tags in the textbuffer's tag table */
145 g_hash_table_foreach(glk_data->styles->text_buffer, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
147 /* Copy the override text tags to the textbuffers's tag table */
148 g_hash_table_foreach(glk_data->glk_styles->text_buffer, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
152 /* Internal function: call this to initialize the default styles to a textgrid. */
154 style_init_textgrid(GtkTextBuffer *buffer)
156 g_return_if_fail(buffer != NULL);
158 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
160 /* Place the default text tags in the textbuffer's tag table */
161 g_hash_table_foreach(glk_data->styles->text_grid, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
163 /* Copy the current text tags to the textbuffers's tag table */
164 g_hash_table_foreach(glk_data->glk_styles->text_grid, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
167 /* Internal function used to iterate over a style table, copying it */
169 style_copy_tag_to_textbuffer(gpointer key, gpointer tag, gpointer target_table)
171 g_return_if_fail(key != NULL);
172 g_return_if_fail(tag != NULL);
173 g_return_if_fail(target_table != NULL);
175 gtk_text_tag_table_add(target_table, gtk_text_tag_copy( GTK_TEXT_TAG(tag) ));
178 /* Internal function that copies a text tag */
180 gtk_text_tag_copy(GtkTextTag *tag)
184 g_return_val_if_fail(tag != NULL, NULL);
186 copy = gtk_text_tag_new(tag->name);
187 gtk_text_attributes_copy_values(tag->values, copy->values);
189 #define _COPY_FLAG(flag) copy->flag = tag->flag
190 _COPY_FLAG (bg_color_set);
191 _COPY_FLAG (bg_color_set);
192 _COPY_FLAG (bg_stipple_set);
193 _COPY_FLAG (fg_color_set);
194 _COPY_FLAG (fg_stipple_set);
195 _COPY_FLAG (justification_set);
196 _COPY_FLAG (left_margin_set);
197 _COPY_FLAG (indent_set);
198 _COPY_FLAG (rise_set);
199 _COPY_FLAG (strikethrough_set);
200 _COPY_FLAG (right_margin_set);
201 _COPY_FLAG (pixels_above_lines_set);
202 _COPY_FLAG (pixels_below_lines_set);
203 _COPY_FLAG (pixels_inside_wrap_set);
204 _COPY_FLAG (tabs_set);
205 _COPY_FLAG (underline_set);
206 _COPY_FLAG (wrap_mode_set);
207 _COPY_FLAG (bg_full_height_set);
208 _COPY_FLAG (invisible_set);
209 _COPY_FLAG (editable_set);
210 _COPY_FLAG (language_set);
211 _COPY_FLAG (scale_set);
214 /* Copy the data that was added manually */
215 gpointer reverse_color = g_object_get_data( G_OBJECT(tag), "reverse-color" );
218 g_object_set_data( G_OBJECT(copy), "reverse-color", reverse_color );
224 /* Internal function that constructs the default styles */
226 style_init(ChimaraGlk *glk)
228 CHIMARA_GLK_USE_PRIVATE(glk, priv);
230 GHashTable *default_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
231 GHashTable *default_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
232 GHashTable *glk_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
233 GHashTable *glk_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
236 PangoFontDescription *default_font_desc = pango_font_description_from_string("Serif");
237 PangoFontDescription *monospace_font_desc = pango_font_description_from_string("Monospace");
239 /* Initialise the default styles for a text grid */
240 tag = gtk_text_tag_new("default");
241 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
242 g_hash_table_insert(default_text_grid_styles, "default", tag);
244 tag = gtk_text_tag_new("normal");
245 //g_object_set(tag, "font-desc", monospace_font_desc, NULL);
246 g_hash_table_insert(default_text_grid_styles, "normal", tag);
248 tag = gtk_text_tag_new("emphasized");
249 //g_object_set(tag, "font-desc", monospace_font_desc, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
250 g_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
251 g_hash_table_insert(default_text_grid_styles, "emphasized", tag);
253 tag = gtk_text_tag_new("preformatted");
254 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
255 g_hash_table_insert(default_text_grid_styles, "preformatted", tag);
257 tag = gtk_text_tag_new("header");
258 //g_object_set(tag, "font-desc", monospace_font_desc, "weight", PANGO_WEIGHT_BOLD, NULL);
259 g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, NULL);
260 g_hash_table_insert(default_text_grid_styles, "header", tag);
262 tag = gtk_text_tag_new("subheader");
263 //g_object_set(tag, "font-desc", monospace_font_desc, "weight", PANGO_WEIGHT_BOLD, NULL);
264 g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, NULL);
265 g_hash_table_insert(default_text_grid_styles, "subheader", tag);
267 tag = gtk_text_tag_new("alert");
268 //g_object_set(tag, "font-desc", monospace_font_desc, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
269 g_object_set(tag, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
270 g_hash_table_insert(default_text_grid_styles, "alert", tag);
272 tag = gtk_text_tag_new("note");
273 //g_object_set(tag, "font-desc", monospace_font_desc, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
274 g_object_set(tag, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
275 g_hash_table_insert(default_text_grid_styles, "note", tag);
277 tag = gtk_text_tag_new("block-quote");
278 //g_object_set(tag, "font-desc", monospace_font_desc, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
279 g_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
280 g_hash_table_insert(default_text_grid_styles, "block-quote", tag);
282 tag = gtk_text_tag_new("input");
283 //g_object_set(tag, "font-desc", monospace_font_desc, NULL);
284 g_hash_table_insert(default_text_grid_styles, "input", tag);
286 tag = gtk_text_tag_new("user1");
287 //g_object_set(tag, "font-desc", monospace_font_desc, NULL);
288 g_hash_table_insert(default_text_grid_styles, "user1", tag);
290 tag = gtk_text_tag_new("user2");
291 //g_object_set(tag, "font-desc", monospace_font_desc, NULL);
292 g_hash_table_insert(default_text_grid_styles, "user2", tag);
294 tag = gtk_text_tag_new("hyperlink");
295 g_object_set(tag, "foreground", "#0000ff", "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
296 g_hash_table_insert(default_text_grid_styles, "hyperlink", tag);
298 /* Initialise the default styles for a text buffer */
299 tag = gtk_text_tag_new("default");
300 g_object_set(tag, "font-desc", default_font_desc, NULL);
301 g_hash_table_insert(default_text_buffer_styles, "default", tag);
303 tag = gtk_text_tag_new("normal");
304 //g_object_set(tag, "font-desc", default_font_desc, NULL);
305 g_hash_table_insert(default_text_buffer_styles, "normal", tag);
307 tag = gtk_text_tag_new("emphasized");
308 //g_object_set(tag, "font-desc", default_font_desc, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
309 g_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
310 g_hash_table_insert(default_text_buffer_styles, "emphasized", tag);
312 tag = gtk_text_tag_new("preformatted");
313 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
314 g_hash_table_insert(default_text_buffer_styles, "preformatted", tag);
316 tag = gtk_text_tag_new("header");
317 //g_object_set(tag, "font-desc", default_font_desc, "size-points", 18.0, "weight", PANGO_WEIGHT_BOLD, NULL);
318 g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, NULL);
319 g_hash_table_insert(default_text_buffer_styles, "header", tag);
321 tag = gtk_text_tag_new("subheader");
322 //g_object_set(tag, "font-desc", default_font_desc, "size-points", 14.0, "weight", PANGO_WEIGHT_BOLD, NULL);
323 g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, NULL);
324 g_hash_table_insert(default_text_buffer_styles, "subheader", tag);
326 tag = gtk_text_tag_new("alert");
327 //g_object_set(tag, "font-desc", default_font_desc, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
328 g_object_set(tag, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
329 g_hash_table_insert(default_text_buffer_styles, "alert", tag);
331 tag = gtk_text_tag_new("note");
332 //g_object_set(tag, "font-desc", default_font_desc, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
333 g_object_set(tag, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
334 g_hash_table_insert(default_text_buffer_styles, "note", tag);
336 tag = gtk_text_tag_new("block-quote");
337 //g_object_set(tag, "font-desc", default_font_desc, "justification", GTK_JUSTIFY_CENTER, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
338 g_object_set(tag, "justification", GTK_JUSTIFY_CENTER, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
339 g_hash_table_insert(default_text_buffer_styles, "block-quote", tag);
341 tag = gtk_text_tag_new("input");
342 //g_object_set(tag, "font-desc", default_font_desc, NULL);
343 g_hash_table_insert(default_text_buffer_styles, "input", tag);
345 tag = gtk_text_tag_new("user1");
346 //g_object_set(tag, "font-desc", default_font_desc, NULL);
347 g_hash_table_insert(default_text_buffer_styles, "user1", tag);
349 tag = gtk_text_tag_new("user2");
350 //g_object_set(tag, "font-desc", default_font_desc, NULL);
351 g_hash_table_insert(default_text_buffer_styles, "user2", tag);
353 tag = gtk_text_tag_new("hyperlink");
354 //g_object_set(tag, "font-desc", default_font_desc, "foreground", "#0000ff", "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
355 g_object_set(tag, "foreground", "#0000ff", "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
356 g_hash_table_insert(default_text_buffer_styles, "hyperlink", tag);
358 GtkTextTag *pager_tag = gtk_text_tag_new("pager");
359 g_object_set(pager_tag, "font-desc", default_font_desc, "foreground", "#ffffff", "background", "#000000", NULL);
360 g_hash_table_insert(default_text_buffer_styles, "pager", pager_tag);
361 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);
363 pango_font_description_free(default_font_desc);
364 pango_font_description_free(monospace_font_desc);
366 priv->styles->text_grid = default_text_grid_styles;
367 priv->styles->text_buffer = default_text_buffer_styles;
370 /* Initialize the GLK styles to empty tags */
372 for(i=0; i<style_NUMSTYLES; i++) {
373 tag = gtk_text_tag_new(GLK_TAG_NAMES[i]);
374 g_hash_table_insert(glk_text_grid_styles, (gchar*) GLK_TAG_NAMES[i], tag);
375 tag = gtk_text_tag_new(GLK_TAG_NAMES[i]);
376 g_hash_table_insert(glk_text_buffer_styles, (gchar*) GLK_TAG_NAMES[i], tag);
379 priv->glk_styles->text_grid = glk_text_grid_styles;
380 priv->glk_styles->text_buffer = glk_text_buffer_styles;
384 /* Reset style tables to the library's internal defaults */
386 reset_default_styles(ChimaraGlk *glk)
388 /* TODO: write this function */
391 /* Create the CSS file scanner */
393 create_css_file_scanner(void)
395 GScanner *scanner = g_scanner_new(NULL);
396 scanner->config->cset_identifier_first = G_CSET_a_2_z G_CSET_A_2_Z "#";
397 scanner->config->cset_identifier_nth = G_CSET_a_2_z G_CSET_A_2_Z "-_" G_CSET_DIGITS;
398 scanner->config->symbol_2_token = TRUE;
399 scanner->config->cpair_comment_single = NULL;
400 scanner->config->scan_float = FALSE;
404 /* Run the scanner over the CSS file, overriding the default styles */
406 scan_css_file(GScanner *scanner, ChimaraGlk *glk)
408 CHIMARA_GLK_USE_PRIVATE(glk, priv);
410 while( g_scanner_peek_next_token(scanner) != G_TOKEN_EOF) {
411 if( !style_accept_style_selector(scanner, glk) )
415 g_scanner_destroy(scanner);
417 /* Update the pager prompt to the new style */
418 GtkTextTag *pager_tag = GTK_TEXT_TAG( g_hash_table_lookup(priv->styles->text_buffer, "pager") );
419 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);
422 /* Internal function: parses a token */
424 style_accept(GScanner *scanner, GTokenType token)
426 GTokenType next = g_scanner_get_next_token(scanner);
428 g_scanner_unexp_token(scanner, token, NULL, NULL, NULL, "CSS Error", 1);
434 /* Internal function: parses a style selector */
436 style_accept_style_selector(GScanner *scanner, ChimaraGlk *glk)
438 CHIMARA_GLK_USE_PRIVATE(glk, priv);
440 GtkTextTag *current_tag;
442 GTokenType token = g_scanner_get_next_token(scanner);
443 GTokenValue value = g_scanner_cur_value(scanner);
446 token != G_TOKEN_IDENTIFIER ||
447 ( strcmp(value.v_identifier, "buffer") && strcmp(value.v_identifier, "grid") )
449 g_scanner_error(scanner, "CSS Error: buffer/grid expected");
453 field = g_strdup(value.v_identifier);
455 /* Parse the tag name to change */
456 if( g_scanner_peek_next_token(scanner) == '{') {
457 style_accept(scanner, '{');
458 if( !strcmp(field, "buffer") )
459 current_tag = g_hash_table_lookup(priv->styles->text_buffer, "default");
461 current_tag = g_hash_table_lookup(priv->styles->text_grid, "default");
463 if( !style_accept(scanner, '.') )
466 token = g_scanner_get_next_token(scanner);
467 value = g_scanner_cur_value(scanner);
469 if(token != G_TOKEN_IDENTIFIER) {
470 g_scanner_error(scanner, "CSS Error: style selector expected");
474 if( !strcmp(field, "buffer") )
475 current_tag = g_hash_table_lookup(priv->styles->text_buffer, value.v_identifier);
477 current_tag = g_hash_table_lookup(priv->styles->text_grid, value.v_identifier);
479 if(current_tag == NULL) {
480 g_scanner_error(scanner, "CSS Error: invalid style identifier");
484 if( !style_accept(scanner, '{') )
488 while( g_scanner_peek_next_token(scanner) != '}') {
489 if( !style_accept_style_hint(scanner, current_tag) )
493 if( !style_accept(scanner, '}') )
499 /* Internal function: parses a style hint */
501 style_accept_style_hint(GScanner *scanner, GtkTextTag *current_tag)
503 GTokenType token = g_scanner_get_next_token(scanner);
504 GTokenValue value = g_scanner_cur_value(scanner);
507 if(token != G_TOKEN_IDENTIFIER) {
508 g_scanner_error(scanner, "CSS Error: style hint expected");
512 hint = g_strdup(value.v_identifier);
514 if( !style_accept(scanner, ':') )
517 token = g_scanner_get_next_token(scanner);
518 value = g_scanner_cur_value(scanner);
520 if( !strcmp(hint, "font-family") ) {
521 if(token != G_TOKEN_STRING) {
522 g_scanner_error(scanner, "CSS Error: string expected");
525 g_object_set(current_tag, "family", value.v_string, "family-set", TRUE, NULL);
527 else if( !strcmp(hint, "font-weight") ) {
528 if(token != G_TOKEN_IDENTIFIER) {
529 g_scanner_error(scanner, "CSS Error: bold/normal expected");
533 if( !strcmp(value.v_identifier, "bold") )
534 g_object_set(current_tag, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL);
535 else if( !strcmp(value.v_identifier, "normal") )
536 g_object_set(current_tag, "weight", PANGO_WEIGHT_NORMAL, "weight-set", TRUE, NULL);
538 g_scanner_error(scanner, "CSS Error: bold/normal expected");
542 else if( !strcmp(hint, "font-style") ) {
543 if(token != G_TOKEN_IDENTIFIER) {
544 g_scanner_error(scanner, "CSS Error: italic/normal expected");
548 if( !strcmp(value.v_identifier, "italic") )
549 g_object_set(current_tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
550 else if( !strcmp(value.v_identifier, "normal") )
551 g_object_set(current_tag, "style", PANGO_STYLE_NORMAL, "style-set", TRUE, NULL);
553 g_scanner_error(scanner, "CSS Error: italic/normal expected");
557 else if( !strcmp(hint, "font-size") ) {
558 if(token == G_TOKEN_INT)
559 g_object_set(current_tag, "size-points", (float)value.v_int, "size-set", TRUE, NULL);
560 else if(token == G_TOKEN_FLOAT)
561 g_object_set(current_tag, "size-points", value.v_float, "size-set", TRUE, NULL);
563 g_scanner_error(scanner, "CSS Error: integer or float expected");
567 else if( !strcmp(hint, "color") ) {
568 if(token != G_TOKEN_IDENTIFIER) {
569 g_scanner_error(scanner, "CSS Error: hex color expected");
573 g_object_set(current_tag, "foreground", value.v_identifier, "foreground-set", TRUE, NULL);
575 else if( !strcmp(hint, "background-color") ) {
576 if(token != G_TOKEN_IDENTIFIER) {
577 g_scanner_error(scanner, "CSS Error: hex color expected");
580 g_object_set(current_tag, "background", value.v_identifier, "background-set", TRUE, NULL);
582 else if( !strcmp(hint, "text-align") ) {
583 if(token != G_TOKEN_IDENTIFIER) {
584 g_scanner_error(scanner, "CSS Error: left/right/center expected");
588 if( !strcmp(value.v_identifier, "left") )
589 g_object_set(current_tag, "justification", GTK_JUSTIFY_LEFT, "justification-set", TRUE, NULL);
590 else if( !strcmp(value.v_identifier, "right") )
591 g_object_set(current_tag, "justification", GTK_JUSTIFY_RIGHT, "justification-set", TRUE, NULL);
592 else if( !strcmp(value.v_identifier, "center") )
593 g_object_set(current_tag, "justification", GTK_JUSTIFY_CENTER, "justification-set", TRUE, NULL);
595 g_scanner_error(scanner, "CSS Error: left/right/center expected");
599 else if( !strcmp(hint, "margin-left") ) {
600 if(token != G_TOKEN_INT) {
601 g_scanner_error(scanner, "CSS Error: integer expected");
604 g_object_set(current_tag, "left-margin", value.v_int, "left-margin-set", TRUE, NULL);
606 else if( !strcmp(hint, "margin-right") ) {
607 if(token != G_TOKEN_INT) {
608 g_scanner_error(scanner, "CSS Error: integer expected");
611 g_object_set(current_tag, "right-margin", value.v_int, "right-margin-set", TRUE, NULL);
613 else if( !strcmp(hint, "margin-top") ) {
614 if(token != G_TOKEN_INT) {
615 g_scanner_error(scanner, "CSS Error: integer expected");
618 g_object_set(current_tag, "pixels-above-lines", value.v_int, "pixels-above-lines-set", TRUE, NULL);
620 else if( !strcmp(hint, "margin-bottom") ) {
621 if(token != G_TOKEN_INT) {
622 g_scanner_error(scanner, "CSS Error: integer expected");
625 g_object_set(current_tag, "pixels-below-lines", value.v_int, "pixels-below-lines-set", TRUE, NULL);
629 g_scanner_error(scanner, "CSS Error: invalid style hint %s", hint);
633 if( !style_accept(scanner, ';') )
639 /* Internal function: parses a glk color to a GdkColor */
641 glkcolor_to_gdkcolor(glui32 val, GdkColor *color)
643 color->red = 256 * ((val & 0xff0000) >> 16);
644 color->green = 256 * ((val & 0x00ff00) >> 8);
645 color->blue = 256 * (val & 0x0000ff);
648 /* Internal function: parses a glk color to a hex string */
650 glkcolor_to_hex(glui32 val)
652 return g_strdup_printf("%04X%04X%04X",
653 256 * ((val & 0xff0000) >> 16),
654 256 * ((val & 0x00ff00) >> 8),
655 256 * (val & 0x0000ff)
659 /* Internal function: parses a gdk color to a hex string */
661 gdkcolor_to_hex(GdkColor *color)
663 return g_strdup_printf("%04X%04X%04X",
664 color->red, color->green, color->blue
668 /* Internal function: parses a GdkColor to a glk color */
670 gdkcolor_to_glkcolor(GdkColor *color)
672 g_return_val_if_fail(color != NULL, 0);
673 return (glui32) color->pixel;
676 /* Internal function: changes a GTK tag to correspond with the given style. */
678 apply_stylehint_to_tag(GtkTextTag *tag, glui32 wintype, glui32 styl, glui32 hint, glsi32 val)
680 g_return_if_fail(tag != NULL);
682 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
683 GObject *tag_object = G_OBJECT(tag);
685 gint reverse_color = GPOINTER_TO_INT( g_object_get_data(tag_object, "reverse-color") );
690 case stylehint_Indentation:
691 g_object_set(tag_object, "left-margin", 5*val, "left-margin-set", TRUE, NULL);
692 g_object_set(tag_object, "right-margin", 5*val, "right-margin-set", TRUE, NULL);
695 case stylehint_ParaIndentation:
696 g_object_set(tag_object, "indent", 5*val, "indent-set", TRUE, NULL);
699 case stylehint_Justification:
701 case stylehint_just_LeftFlush: i = GTK_JUSTIFY_LEFT; break;
702 case stylehint_just_LeftRight: i = GTK_JUSTIFY_FILL; break;
703 case stylehint_just_Centered: i = GTK_JUSTIFY_CENTER; break;
704 case stylehint_just_RightFlush: i = GTK_JUSTIFY_RIGHT; break;
706 WARNING("Unknown justification");
707 i = GTK_JUSTIFY_LEFT;
709 g_object_set(tag_object, "justification", i, "justification-set", TRUE, NULL);
712 case stylehint_Weight:
714 case -1: i = PANGO_WEIGHT_LIGHT; break;
715 case 0: i = PANGO_WEIGHT_NORMAL; break;
716 case 1: i = PANGO_WEIGHT_BOLD; break;
717 default: WARNING("Unknown font weight");
719 g_object_set(tag_object, "weight", i, "weight-set", TRUE, NULL);
724 gdouble scale = PANGO_SCALE_MEDIUM;
726 case -3: scale = PANGO_SCALE_XX_SMALL; break;
727 case -2: scale = PANGO_SCALE_X_SMALL; break;
728 case -1: scale = PANGO_SCALE_SMALL; break;
729 case 0: scale = PANGO_SCALE_MEDIUM; break;
730 case 1: scale = PANGO_SCALE_LARGE; break;
731 case 2: scale = PANGO_SCALE_X_LARGE; break;
732 case 3: scale = PANGO_SCALE_XX_LARGE; break;
734 /* We follow Pango's convention of having each magnification
735 step be a scaling of 1.2 */
736 scale = pow(1.2, (double)val);
738 g_object_set(tag_object, "scale", scale, "scale-set", TRUE, NULL);
742 case stylehint_Oblique:
743 g_object_set(tag_object, "style", val ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL, "style-set", TRUE, NULL);
746 case stylehint_Proportional:
749 GtkTextTag *font_tag = g_hash_table_lookup(
750 wintype == wintype_TextBuffer? glk_data->styles->text_buffer : glk_data->styles->text_grid,
751 val? "default" : "preformatted");
752 g_object_get(font_tag, "family", &font_family, NULL);
753 g_object_set(tag_object, "family", font_family, "family-set", TRUE, NULL);
758 case stylehint_TextColor:
759 glkcolor_to_gdkcolor(val, &color);
762 g_object_set(tag_object, "foreground-gdk", &color, "foreground-set", TRUE, NULL);
764 g_object_set(tag_object, "background-gdk", &color, "background-set", TRUE, NULL);
768 case stylehint_BackColor:
769 glkcolor_to_gdkcolor(val, &color);
772 g_object_set(tag_object, "background-gdk", &color, "background-set", TRUE, NULL);
774 g_object_set(tag_object, "foreground-gdk", &color, "background-set", TRUE, NULL);
778 case stylehint_ReverseColor:
780 // Determine the current colors
782 // If all fails, use black/white
783 // FIXME: Use system theme here
784 GdkColor foreground, background;
785 gdk_color_parse("black", &foreground);
786 gdk_color_parse("white", &background);
787 GdkColor *current_foreground = &foreground;
788 GdkColor *current_background = &background;
790 if(wintype == wintype_TextBuffer) {
791 GtkTextTag* default_tag = g_hash_table_lookup(glk_data->styles->text_buffer, "default");
792 GtkTextTag* base_tag = g_hash_table_lookup(glk_data->styles->text_buffer, get_tag_name(styl));
793 style_cascade_colors(base_tag, tag, default_tag, ¤t_foreground, ¤t_background);
795 else if(wintype == wintype_TextGrid) {
796 GtkTextTag* default_tag = g_hash_table_lookup(glk_data->styles->text_grid, "default");
797 GtkTextTag* base_tag = g_hash_table_lookup(glk_data->styles->text_grid, get_tag_name(styl));
798 style_cascade_colors(base_tag, tag, default_tag, ¤t_foreground, ¤t_background);
802 /* Flip the fore- and background colors */
803 GdkColor *temp = current_foreground;
804 current_foreground = current_background;
805 current_background = temp;
809 "foreground-gdk", current_foreground,
810 "foreground-set", TRUE,
811 "background-gdk", current_background,
812 "background-set", TRUE,
816 g_object_set_data( tag_object, "reverse-color", GINT_TO_POINTER(val != 0) );
821 WARNING("Unknown style hint");
825 /* Internal function: queries a text tag for the value of a given style hint */
827 query_tag(GtkTextTag *tag, glui32 wintype, glui32 hint)
833 g_return_val_if_fail(tag != NULL, 0);
835 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
838 case stylehint_Indentation:
839 g_object_get(tag, "left_margin", &intval, NULL);
842 case stylehint_ParaIndentation:
843 g_object_get(tag, "indent", &intval, NULL);
846 case stylehint_Justification:
847 g_object_get(tag, "justification", &intval, NULL);
849 case GTK_JUSTIFY_LEFT: return stylehint_just_LeftFlush;
850 case GTK_JUSTIFY_FILL: return stylehint_just_LeftRight;
851 case GTK_JUSTIFY_CENTER: return stylehint_just_Centered;
852 case GTK_JUSTIFY_RIGHT: return stylehint_just_RightFlush;
854 WARNING("Unknown justification");
855 return stylehint_just_LeftFlush;
858 case stylehint_Weight:
859 g_object_get(tag, "weight", &intval, NULL);
861 case PANGO_WEIGHT_LIGHT: return -1;
862 case PANGO_WEIGHT_NORMAL: return 0;
863 case PANGO_WEIGHT_BOLD: return 1;
864 default: WARNING("Unknown font weight"); return 0;
868 g_object_get(tag, "scale", &doubleval, NULL);
869 return (gint)round(log(doubleval) / log(1.2));
871 case stylehint_Oblique:
872 g_object_get(tag, "style", &intval , NULL);
873 return intval == PANGO_STYLE_ITALIC ? 1 : 0;
875 case stylehint_Proportional:
876 /* Use pango_font_family_is_monospace()? */
878 gchar *font_family, *query_font_family;
879 GtkTextTag *font_tag = g_hash_table_lookup(
880 wintype == wintype_TextBuffer? glk_data->styles->text_buffer : glk_data->styles->text_grid,
882 g_object_get(font_tag, "family", &font_family, NULL);
883 g_object_get(tag, "family", &query_font_family, NULL);
884 gint retval = strcmp(font_family, query_font_family)? 0 : 1;
886 g_free(query_font_family);
890 case stylehint_TextColor:
891 g_object_get(tag, "foreground-gdk", &colval, NULL);
892 return gdkcolor_to_glkcolor(colval);
894 case stylehint_BackColor:
895 g_object_get(tag, "background-gdk", &colval, NULL);
896 return gdkcolor_to_glkcolor(colval);
898 case stylehint_ReverseColor:
899 return GPOINTER_TO_INT( g_object_get_data(G_OBJECT(tag), "reverse_color") );
902 WARNING("Unknown style hint");
910 * @wintype: The window type to set a style hint on, or %wintype_AllTypes.
911 * @styl: The style to set a hint for.
912 * @hint: The type of style hint, one of the <code>stylehint_</code> constants.
913 * @val: The style hint. The meaning of this depends on @hint.
915 * Sets a hint about the appearance of one style for a particular type of
916 * window. You can also set @wintype to %wintype_AllTypes, which sets a hint for
917 * all types of window.
919 * There is no equivalent constant to set a hint for all styles of a single
924 glk_stylehint_set(glui32 wintype, glui32 styl, glui32 hint, glsi32 val)
927 g_printf("glk_stylehint_set(wintype=%d, styl=%d, hint=%d, val=%d)\n", wintype, styl, hint, val);
930 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
932 GtkTextTag *to_change;
933 if(wintype == wintype_TextBuffer || wintype == wintype_AllTypes) {
934 to_change = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) );
935 apply_stylehint_to_tag(to_change, wintype_TextBuffer, styl, hint, val);
938 if(wintype == wintype_TextGrid || wintype == wintype_AllTypes) {
939 to_change = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) );
940 apply_stylehint_to_tag(to_change, wintype_TextGrid, styl, hint, val);
945 * glk_stylehint_clear:
946 * @wintype: The window type to set a style hint on, or %wintype_AllTypes.
947 * @styl: The style to set a hint for.
948 * @hint: The type of style hint, one of the <code>stylehint_</code> constants.
950 * Clears a hint about the appearance of one style for a particular type of
951 * window to its default value. You can also set @wintype to %wintype_AllTypes,
952 * which clears a hint for all types of window.
954 * There is no equivalent constant to reset a hint for all styles of a single
959 glk_stylehint_clear(glui32 wintype, glui32 styl, glui32 hint)
962 g_printf("glk_stylehint_clear(wintype=%d, styl=%d, hint=%d)\n", wintype, styl, hint);
965 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
969 case wintype_TextBuffer:
970 tag = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) );
972 glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) );
975 case wintype_TextGrid:
976 tag = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) );
978 glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) );
986 * glk_style_distinguish:
987 * @win: The window in which the styles are to be distinguished.
988 * @styl1: The first style to be distinguished from the second style.
989 * @styl2: The second style to be distinguished from the first style.
991 * Decides whether two styles are visually distinguishable in the given window.
992 * The exact meaning of this is left for the library to determine.
993 * <note><title>Chimara</title><para>
994 * Currently, all styles of one window are assumed to be mutually
998 * Returns: %TRUE (1) if the two styles are visually distinguishable. If they
999 * are not, it returns %FALSE (0).
1002 glk_style_distinguish(winid_t win, glui32 styl1, glui32 styl2)
1005 g_printf("glk_style_distinguish(win->rock=%d, styl1=%d, styl2=%d)\n", win->rock, styl1, styl2);
1009 return styl1 != styl2;
1013 * glk_style_measure:
1014 * @win: The window from which to take the style.
1015 * @styl: The style to perform the measurement on.
1016 * @hint: The stylehint to measure.
1017 * @result: Address to write the result to.
1019 * Tries to test an attribute of one style in the given window @win. The library
1020 * may not be able to determine the attribute; if not, this returns %FALSE (0).
1021 * If it can, it returns %TRUE (1) and stores the value in the location pointed
1024 * As usual, it is legal for @result to be %NULL, although fairly pointless.
1027 * The meaning of the value depends on the hint which was tested:
1030 * <term>%stylehint_Indentation, %stylehint_ParaIndentation</term>
1031 * <listitem><para>The indentation and paragraph indentation. These are in a
1032 * metric which is platform-dependent.</para>
1033 * <note><para>Most likely either characters or pixels.</para></note>
1037 * <term>%stylehint_Justification</term>
1038 * <listitem><para>One of the constants %stylehint_just_LeftFlush,
1039 * %stylehint_just_LeftRight, %stylehint_just_Centered, or
1040 * %stylehint_just_RightFlush.</para></listitem>
1043 * <term>%stylehint_Size</term>
1044 * <listitem><para>The font size. Again, this is in a platform-dependent
1046 * <note><para>Pixels, points, or simply 1 if the library does not support
1047 * varying font sizes.</para></note>
1051 * <term>%stylehint_Weight</term>
1052 * <listitem><para>1 for heavy-weight fonts (boldface), 0 for normal weight,
1053 * and -1 for light-weight fonts.</para></listitem>
1056 * <term>%stylehint_Oblique</term>
1057 * <listitem><para>1 for oblique fonts (italic), or 0 for normal angle.</para>
1061 * <term>%stylehint_Proportional</term>
1062 * <listitem><para>1 for proportional-width fonts, or 0 for fixed-width.
1063 * </para></listitem>
1066 * <term>%stylehint_TextColor, %stylehint_BackColor</term>
1067 * <listitem><para>These are values from 0x00000000 to 0x00FFFFFF, encoded as
1068 * described in <link
1069 * linkend="chimara-Suggesting-the-Appearance-of-Styles">Suggesting the
1070 * Appearance of Styles</link>.</para></listitem>
1073 * <term>%stylehint_ReverseColor</term>
1074 * <listitem><para>0 for normal printing, 1 if the foreground and background
1075 * colors are reversed.</para></listitem>
1078 * Signed values, such as the %stylehint_Weight value, are cast to
1079 * <type>glui32</type>. They may be cast to <type>glsi32</type> to be dealt with
1080 * in a more natural context.
1082 * Returns: TRUE upon successul retrieval, otherwise FALSE.
1085 glk_style_measure(winid_t win, glui32 styl, glui32 hint, glui32 *result)
1088 g_printf("glk_style_measure(win->rock=%d, styl=%d, hint=%d, result=...)\n", win->rock, styl, hint);
1091 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
1095 case wintype_TextBuffer:
1096 tag = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) );
1098 *result = query_tag(tag, win->type, hint);
1100 case wintype_TextGrid:
1101 tag = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) );
1103 *result = query_tag(tag, win->type, hint);
1111 /* Internal function returning the current default font for a window type
1112 * This can be used later for size calculations. Only wintype_TextGrid and wintype_TextBuffer are
1113 * supported for now */
1114 PangoFontDescription *
1115 get_current_font(guint32 wintype)
1117 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
1121 case wintype_TextGrid:
1122 tag = g_hash_table_lookup(glk_data->styles->text_grid, "default");
1124 case wintype_TextBuffer:
1125 tag = g_hash_table_lookup(glk_data->styles->text_buffer, "default");
1131 PangoFontDescription *font;
1132 g_object_get( G_OBJECT(tag), "font-desc", &font, NULL );
1137 /* Internal function copying the attributes of a text tag to a pango attribute list */
1139 text_tag_to_attr_list(GtkTextTag *tag, PangoAttrList *list)
1142 GdkColor *foreground, *background;
1144 PangoFontDescription *font_desc;
1145 gboolean strikethrough;
1146 PangoUnderline underline;
1148 g_object_get(tag, "foreground-set", &set, "foreground-gdk", &foreground, NULL);
1150 pango_attr_list_insert(
1152 pango_attr_foreground_new(foreground->red, foreground->green, foreground->blue)
1155 g_object_get(tag, "background-set", &set, "background-gdk", &background, NULL);
1157 pango_attr_list_insert(
1159 pango_attr_background_new(background->red, background->green, background->blue)
1162 g_object_get(tag, "language-set", &set, "language", &string, NULL);
1164 pango_attr_list_insert(
1166 pango_attr_language_new( pango_language_from_string(string) )
1170 /* Font description updates the following properties simultaniously:
1171 * family, style, weight, variant, stretch, size
1173 g_object_get(tag, "font-desc", &font_desc, NULL);
1174 pango_attr_list_insert(
1176 pango_attr_font_desc_new(font_desc)
1179 g_object_get(tag, "strikethrough-set", &set, "strikethrough", &strikethrough, NULL);
1181 pango_attr_list_insert(
1183 pango_attr_strikethrough_new(strikethrough)
1186 g_object_get(tag, "underline-set", &set, "underline", &underline, NULL);
1188 pango_attr_list_insert(
1190 pango_attr_underline_new(underline)
1195 /* Update pager and reverse video tags */
1197 style_update(ChimaraGlk *glk)
1199 CHIMARA_GLK_USE_PRIVATE(glk, priv);
1201 GtkTextTag *pager_tag = GTK_TEXT_TAG( g_hash_table_lookup(priv->styles->text_buffer, "pager") );
1202 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);
1205 /* Determine the current colors used to render the text for a given stream.
1206 * This can be set in a number of places */
1208 style_cascade_colors(GtkTextTag *tag, GtkTextTag *glk_tag, GtkTextTag *default_tag, GdkColor **foreground, GdkColor **background)
1210 gboolean foreground_set = FALSE;
1211 gboolean background_set = FALSE;
1215 reverse_color = GPOINTER_TO_INT( g_object_get_data(G_OBJECT(default_tag), "reverse-color") );
1216 g_object_get(default_tag, "foreground-set", &foreground_set, "background-set", &background_set, NULL);
1218 g_object_get(default_tag, "foreground-gdk", reverse_color ? background:foreground, NULL);
1220 g_object_get(default_tag, "background-gdk", reverse_color ? foreground:background, NULL);
1222 // Player defined color
1223 reverse_color = GPOINTER_TO_INT( g_object_get_data(G_OBJECT(tag), "reverse-color") );
1224 g_object_get(tag, "foreground-set", &foreground_set, "background-set", &background_set, NULL);
1226 g_object_get(tag, "foreground-gdk", reverse_color ? background:foreground, NULL);
1228 g_object_get(tag, "background-gdk", reverse_color ? foreground:background, NULL);
1230 // GLK defined color
1231 reverse_color = GPOINTER_TO_INT( g_object_get_data(G_OBJECT(glk_tag), "reverse-color") );
1232 g_object_get(glk_tag, "foreground-set", &foreground_set, "background-set", &background_set, NULL);
1234 g_object_get(glk_tag, "foreground-gdk", reverse_color ? background:foreground, NULL);
1236 g_object_get(glk_tag, "background-gdk", reverse_color ? foreground:background, NULL);
1240 /* Determine the current colors used to render the text for a given stream.
1241 * This can be set in a number of places */
1243 style_stream_colors(strid_t str, GdkColor **foreground, GdkColor **background)
1245 VALID_STREAM(str, return);
1246 g_return_if_fail(str->window != NULL);
1247 g_return_if_fail(str->window->type != wintype_TextBuffer || str->window->type != wintype_TextGrid);
1249 GtkTextBuffer *buffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW(str->window->widget) );
1250 GtkTextTagTable *tags = gtk_text_buffer_get_tag_table(buffer);
1251 GtkTextTag* default_tag = gtk_text_tag_table_lookup(tags, "default");
1252 GtkTextTag* tag = gtk_text_tag_table_lookup(tags, str->style);
1253 GtkTextTag* glk_tag = gtk_text_tag_table_lookup(tags, str->glk_style);
1255 style_cascade_colors(tag, glk_tag, default_tag, foreground, background);
1257 gboolean foreground_set, background_set;
1259 // Windows can have zcolors defined
1260 if(str->window->zcolor) {
1261 g_object_get(str->window->zcolor, "foreground-set", &foreground_set, "background-set", &background_set, NULL);
1263 g_object_get(str->window->zcolor, "foreground-gdk", foreground, NULL);
1265 g_object_get(str->window->zcolor, "background-gdk", background, NULL);