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);
41 static const gchar* TAG_NAMES[] = {
57 static const gchar* GLK_TAG_NAMES[] = {
77 /* Internal function: mapping from style enum to tag name */
79 get_tag_name(glui32 style)
81 if(style >= CHIMARA_NUM_STYLES) {
82 WARNING("Unsupported style");
85 return (gchar*) TAG_NAMES[style];
89 /* Internal function: mapping from glk style enum to tag name */
91 get_glk_tag_name(glui32 style)
93 if(style >= style_NUMSTYLES) {
94 WARNING("Unsupported style");
97 return (gchar*) GLK_TAG_NAMES[style];
102 * glk_set_style_stream:
103 * @str: Output stream to change the style of
104 * @styl: The style to apply
106 * This changes the style of the stream @str. See glk_set_style().
109 glk_set_style_stream(strid_t str, glui32 styl) {
110 if(str->window == NULL)
113 flush_window_buffer(str->window);
114 str->style = (gchar*) get_tag_name(styl);
115 str->glk_style = (gchar*) get_glk_tag_name(styl);
118 /* Internal function: call this to initialize the layout of the 'more' prompt. */
120 style_init_more_prompt(winid_t win)
122 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
124 win->pager_layout = gtk_widget_create_pango_layout(win->widget, "More");
125 pango_layout_set_attributes(win->pager_layout, glk_data->pager_attr_list);
128 /* Internal function: call this to initialize the default styles to a textbuffer. */
130 style_init_textbuffer(GtkTextBuffer *buffer)
132 g_return_if_fail(buffer != NULL);
134 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
136 /* Place the default text tags in the textbuffer's tag table */
137 g_hash_table_foreach(glk_data->styles->text_buffer, style_add_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
139 /* Copy the override text tags to the textbuffers's tag table */
140 g_hash_table_foreach(glk_data->glk_styles->text_buffer, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
144 /* Internal function: call this to initialize the default styles to a textgrid. */
146 style_init_textgrid(GtkTextBuffer *buffer)
148 g_return_if_fail(buffer != NULL);
150 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
152 /* Place the default text tags in the textbuffer's tag table */
153 g_hash_table_foreach(glk_data->styles->text_grid, style_add_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
155 /* Copy the current text tags to the textbuffers's tag table */
156 g_hash_table_foreach(glk_data->glk_styles->text_grid, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
159 /* Internal function used to iterate over the default text tag table, applying them to a textbuffer */
161 style_add_tag_to_textbuffer(gpointer key, gpointer tag, gpointer tag_table)
163 g_return_if_fail(key != NULL);
164 g_return_if_fail(tag != NULL);
165 g_return_if_fail(tag_table != NULL);
167 gtk_text_tag_table_add(tag_table, tag);
170 /* Internal function used to iterate over a style table, copying it */
172 style_copy_tag_to_textbuffer(gpointer key, gpointer tag, gpointer target_table)
174 g_return_if_fail(key != NULL);
175 g_return_if_fail(tag != NULL);
176 g_return_if_fail(target_table != NULL);
178 gtk_text_tag_table_add(target_table, gtk_text_tag_copy( GTK_TEXT_TAG(tag) ));
181 /* Internal function that copies a text tag */
183 gtk_text_tag_copy(GtkTextTag *tag)
187 g_return_val_if_fail(tag != NULL, NULL);
189 copy = gtk_text_tag_new(tag->name);
190 gtk_text_attributes_copy_values(tag->values, copy->values);
192 #define _COPY_FLAG(flag) copy->flag = tag->flag
193 _COPY_FLAG (bg_color_set);
194 _COPY_FLAG (bg_color_set);
195 _COPY_FLAG (bg_stipple_set);
196 _COPY_FLAG (fg_color_set);
197 _COPY_FLAG (fg_stipple_set);
198 _COPY_FLAG (justification_set);
199 _COPY_FLAG (left_margin_set);
200 _COPY_FLAG (indent_set);
201 _COPY_FLAG (rise_set);
202 _COPY_FLAG (strikethrough_set);
203 _COPY_FLAG (right_margin_set);
204 _COPY_FLAG (pixels_above_lines_set);
205 _COPY_FLAG (pixels_below_lines_set);
206 _COPY_FLAG (pixels_inside_wrap_set);
207 _COPY_FLAG (tabs_set);
208 _COPY_FLAG (underline_set);
209 _COPY_FLAG (wrap_mode_set);
210 _COPY_FLAG (bg_full_height_set);
211 _COPY_FLAG (invisible_set);
212 _COPY_FLAG (editable_set);
213 _COPY_FLAG (language_set);
216 /* Copy the data that was added manually */
217 gpointer reverse_color = g_object_get_data( G_OBJECT(tag), "reverse_color" );
220 g_object_set_data( G_OBJECT(copy), "reverse_color", reverse_color );
225 /* Internal function that constructs the default styles */
227 style_init(ChimaraGlk *glk)
229 CHIMARA_GLK_USE_PRIVATE(glk, priv);
231 GHashTable *default_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
232 GHashTable *default_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
233 GHashTable *glk_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
234 GHashTable *glk_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
237 PangoFontDescription *default_font_desc = pango_font_description_from_string("Serif");
238 PangoFontDescription *monospace_font_desc = pango_font_description_from_string("Monospace");
240 /* Initialise the default styles for a text grid */
241 tag = gtk_text_tag_new("normal");
242 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
243 g_hash_table_insert(default_text_grid_styles, "normal", tag);
245 tag = gtk_text_tag_new("emphasized");
246 g_object_set(tag, "font-desc", monospace_font_desc, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
247 g_hash_table_insert(default_text_grid_styles, "emphasized", tag);
249 tag = gtk_text_tag_new("preformatted");
250 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
251 g_hash_table_insert(default_text_grid_styles, "preformatted", tag);
253 tag = gtk_text_tag_new("header");
254 g_object_set(tag, "font-desc", monospace_font_desc, "weight", PANGO_WEIGHT_BOLD, NULL);
255 g_hash_table_insert(default_text_grid_styles, "header", tag);
257 tag = gtk_text_tag_new("subheader");
258 g_object_set(tag, "font-desc", monospace_font_desc, "weight", PANGO_WEIGHT_BOLD, NULL);
259 g_hash_table_insert(default_text_grid_styles, "subheader", tag);
261 tag = gtk_text_tag_new("alert");
262 g_object_set(tag, "font-desc", monospace_font_desc, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
263 g_hash_table_insert(default_text_grid_styles, "alert", tag);
265 tag = gtk_text_tag_new("note");
266 g_object_set(tag, "font-desc", monospace_font_desc, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
267 g_hash_table_insert(default_text_grid_styles, "note", tag);
269 tag = gtk_text_tag_new("block-quote");
270 g_object_set(tag, "font-desc", monospace_font_desc, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
271 g_hash_table_insert(default_text_grid_styles, "block-quote", tag);
273 tag = gtk_text_tag_new("input");
274 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
275 g_hash_table_insert(default_text_grid_styles, "input", tag);
277 tag = gtk_text_tag_new("user1");
278 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
279 g_hash_table_insert(default_text_grid_styles, "user1", tag);
281 tag = gtk_text_tag_new("user2");
282 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
283 g_hash_table_insert(default_text_grid_styles, "user2", tag);
285 tag = gtk_text_tag_new("hyperlink");
286 g_object_set(tag, "foreground", "#0000ff", "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
287 g_hash_table_insert(default_text_grid_styles, "hyperlink", tag);
289 /* Initialise the default styles for a text buffer */
290 tag = gtk_text_tag_new("normal");
291 g_object_set(tag, "font-desc", default_font_desc, NULL);
292 g_hash_table_insert(default_text_buffer_styles, "normal", tag);
294 tag = gtk_text_tag_new("emphasized");
295 g_object_set(tag, "font-desc", default_font_desc, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
296 g_hash_table_insert(default_text_buffer_styles, "emphasized", tag);
298 tag = gtk_text_tag_new("preformatted");
299 g_object_set(tag, "font-desc", monospace_font_desc, NULL);
300 g_hash_table_insert(default_text_buffer_styles, "preformatted", tag);
302 tag = gtk_text_tag_new("header");
303 g_object_set(tag, "font-desc", default_font_desc, "size-points", 18.0, "weight", PANGO_WEIGHT_BOLD, NULL);
304 g_hash_table_insert(default_text_buffer_styles, "header", tag);
306 tag = gtk_text_tag_new("subheader");
307 g_object_set(tag, "font-desc", default_font_desc, "size-points", 14.0, "weight", PANGO_WEIGHT_BOLD, NULL);
308 g_hash_table_insert(default_text_buffer_styles, "subheader", tag);
310 tag = gtk_text_tag_new("alert");
311 g_object_set(tag, "font-desc", default_font_desc, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
312 g_hash_table_insert(default_text_buffer_styles, "alert", tag);
314 tag = gtk_text_tag_new("note");
315 g_object_set(tag, "font-desc", default_font_desc, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
316 g_hash_table_insert(default_text_buffer_styles, "note", tag);
318 tag = gtk_text_tag_new("block-quote");
319 g_object_set(tag, "font-desc", default_font_desc, "justification", GTK_JUSTIFY_CENTER, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
320 g_hash_table_insert(default_text_buffer_styles, "block-quote", tag);
322 tag = gtk_text_tag_new("input");
323 g_object_set(tag, "font-desc", default_font_desc, NULL);
324 g_hash_table_insert(default_text_buffer_styles, "input", tag);
326 tag = gtk_text_tag_new("user1");
327 g_object_set(tag, "font-desc", default_font_desc, NULL);
328 g_hash_table_insert(default_text_buffer_styles, "user1", tag);
330 tag = gtk_text_tag_new("user2");
331 g_object_set(tag, "font-desc", default_font_desc, NULL);
332 g_hash_table_insert(default_text_buffer_styles, "user2", tag);
334 tag = gtk_text_tag_new("hyperlink");
335 g_object_set(tag, "font-desc", default_font_desc, "foreground", "#0000ff", "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
336 g_hash_table_insert(default_text_buffer_styles, "hyperlink", tag);
338 GtkTextTag *pager_tag = gtk_text_tag_new("pager");
339 g_object_set(pager_tag, "font-desc", default_font_desc, "foreground", "#ffffff", "background", "#000000", NULL);
340 g_hash_table_insert(default_text_buffer_styles, "pager", pager_tag);
341 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);
343 pango_font_description_free(default_font_desc);
344 pango_font_description_free(monospace_font_desc);
346 priv->styles->text_grid = default_text_grid_styles;
347 priv->styles->text_buffer = default_text_buffer_styles;
350 /* Initialize the GLK styles to empty tags */
352 for(i=0; i<style_NUMSTYLES; i++) {
353 tag = gtk_text_tag_new(GLK_TAG_NAMES[i]);
354 g_hash_table_insert(glk_text_grid_styles, (gchar*) GLK_TAG_NAMES[i], tag);
355 g_hash_table_insert(glk_text_buffer_styles, (gchar*) GLK_TAG_NAMES[i], tag);
358 priv->glk_styles->text_grid = glk_text_grid_styles;
359 priv->glk_styles->text_buffer = glk_text_buffer_styles;
363 /* Reset style tables to the library's internal defaults */
365 reset_default_styles(ChimaraGlk *glk)
367 /* TODO: write this function */
370 /* Copy the default styles to the current styles
371 FIXME: This function is temporary and will not be needed later on */
373 copy_default_styles_to_current_styles(ChimaraGlk *glk)
376 CHIMARA_GLK_USE_PRIVATE(glk, priv);
377 g_hash_table_foreach(priv->styles->text_grid, style_table_copy, priv->glk_styles->text_grid);
378 g_hash_table_foreach(priv->styles->text_buffer, style_table_copy, priv->glk_styles->text_buffer);
380 GtkTextTag *pager_tag = GTK_TEXT_TAG( g_hash_table_lookup(priv->styles->text_buffer, "pager") );
381 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);
385 /* Create the CSS file scanner */
387 create_css_file_scanner(void)
389 GScanner *scanner = g_scanner_new(NULL);
390 scanner->config->cset_identifier_first = G_CSET_a_2_z G_CSET_A_2_Z "#";
391 scanner->config->cset_identifier_nth = G_CSET_a_2_z G_CSET_A_2_Z "-_" G_CSET_DIGITS;
392 scanner->config->symbol_2_token = TRUE;
393 scanner->config->cpair_comment_single = NULL;
394 scanner->config->scan_float = FALSE;
398 /* Run the scanner over the CSS file, overriding the default styles */
400 scan_css_file(GScanner *scanner, ChimaraGlk *glk)
402 CHIMARA_GLK_USE_PRIVATE(glk, priv);
404 while( g_scanner_peek_next_token(scanner) != G_TOKEN_EOF) {
405 if( !style_accept_style_selector(scanner, glk) )
409 g_scanner_destroy(scanner);
411 /* Update the pager prompt to the new style */
412 GtkTextTag *pager_tag = GTK_TEXT_TAG( g_hash_table_lookup(priv->styles->text_buffer, "pager") );
413 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);
416 /* Internal function: parses a token */
418 style_accept(GScanner *scanner, GTokenType token)
420 GTokenType next = g_scanner_get_next_token(scanner);
422 g_scanner_unexp_token(scanner, token, NULL, NULL, NULL, "CSS Error", 1);
428 /* Internal function: parses a style selector */
430 style_accept_style_selector(GScanner *scanner, ChimaraGlk *glk)
432 CHIMARA_GLK_USE_PRIVATE(glk, priv);
434 GtkTextTag *current_tag;
436 GTokenType token = g_scanner_get_next_token(scanner);
437 GTokenValue value = g_scanner_cur_value(scanner);
440 token != G_TOKEN_IDENTIFIER ||
441 ( strcmp(value.v_identifier, "buffer") && strcmp(value.v_identifier, "grid") )
443 g_scanner_error(scanner, "CSS Error: buffer/grid expected");
447 field = g_strdup(value.v_identifier);
449 if( !style_accept(scanner, '.') )
452 token = g_scanner_get_next_token(scanner);
453 value = g_scanner_cur_value(scanner);
455 if(token != G_TOKEN_IDENTIFIER) {
456 g_scanner_error(scanner, "CSS Error: style selector expected");
460 if( !strcmp(field, "buffer") )
461 current_tag = g_hash_table_lookup(priv->styles->text_buffer, value.v_identifier);
463 current_tag = g_hash_table_lookup(priv->styles->text_grid, value.v_identifier);
465 if(current_tag == NULL) {
466 g_scanner_error(scanner, "CSS Error: invalid style identifier");
470 if( !style_accept(scanner, '{') )
473 while( g_scanner_peek_next_token(scanner) != '}') {
474 if( !style_accept_style_hint(scanner, current_tag) )
478 if( !style_accept(scanner, '}') )
484 /* Internal function: parses a style hint */
486 style_accept_style_hint(GScanner *scanner, GtkTextTag *current_tag)
488 GTokenType token = g_scanner_get_next_token(scanner);
489 GTokenValue value = g_scanner_cur_value(scanner);
492 if(token != G_TOKEN_IDENTIFIER) {
493 g_scanner_error(scanner, "CSS Error: style hint expected");
497 hint = g_strdup(value.v_identifier);
499 if( !style_accept(scanner, ':') )
502 token = g_scanner_get_next_token(scanner);
503 value = g_scanner_cur_value(scanner);
505 if( !strcmp(hint, "font-family") ) {
506 if(token != G_TOKEN_STRING) {
507 g_scanner_error(scanner, "CSS Error: string expected");
510 g_object_set(current_tag, "family", value.v_string, "family-set", TRUE, NULL);
512 else if( !strcmp(hint, "font-weight") ) {
513 if(token != G_TOKEN_IDENTIFIER) {
514 g_scanner_error(scanner, "CSS Error: bold/normal expected");
518 if( !strcmp(value.v_identifier, "bold") )
519 g_object_set(current_tag, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL);
520 else if( !strcmp(value.v_identifier, "normal") )
521 g_object_set(current_tag, "weight", PANGO_WEIGHT_NORMAL, "weight-set", TRUE, NULL);
523 g_scanner_error(scanner, "CSS Error: bold/normal expected");
527 else if( !strcmp(hint, "font-style") ) {
528 if(token != G_TOKEN_IDENTIFIER) {
529 g_scanner_error(scanner, "CSS Error: italic/normal expected");
533 if( !strcmp(value.v_identifier, "italic") )
534 g_object_set(current_tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
535 else if( !strcmp(value.v_identifier, "normal") )
536 g_object_set(current_tag, "style", PANGO_STYLE_NORMAL, "style-set", TRUE, NULL);
538 g_scanner_error(scanner, "CSS Error: italic/normal expected");
542 else if( !strcmp(hint, "font-size") ) {
543 if(token == G_TOKEN_INT)
544 g_object_set(current_tag, "size-points", (float)value.v_int, "size-set", TRUE, NULL);
545 else if(token == G_TOKEN_FLOAT)
546 g_object_set(current_tag, "size-points", value.v_float, "size-set", TRUE, NULL);
548 g_scanner_error(scanner, "CSS Error: integer or float expected");
552 else if( !strcmp(hint, "color") ) {
553 if(token != G_TOKEN_IDENTIFIER) {
554 g_scanner_error(scanner, "CSS Error: hex color expected");
558 g_object_set(current_tag, "foreground", value.v_identifier, "foreground-set", TRUE, NULL);
560 else if( !strcmp(hint, "background-color") ) {
561 if(token != G_TOKEN_IDENTIFIER) {
562 g_scanner_error(scanner, "CSS Error: hex color expected");
565 g_object_set(current_tag, "background", value.v_identifier, "background-set", TRUE, NULL);
567 else if( !strcmp(hint, "text-align") ) {
568 if(token != G_TOKEN_IDENTIFIER) {
569 g_scanner_error(scanner, "CSS Error: left/right/center expected");
573 if( !strcmp(value.v_identifier, "left") )
574 g_object_set(current_tag, "justification", GTK_JUSTIFY_LEFT, "justification-set", TRUE, NULL);
575 else if( !strcmp(value.v_identifier, "right") )
576 g_object_set(current_tag, "justification", GTK_JUSTIFY_RIGHT, "justification-set", TRUE, NULL);
577 else if( !strcmp(value.v_identifier, "center") )
578 g_object_set(current_tag, "justification", GTK_JUSTIFY_CENTER, "justification-set", TRUE, NULL);
580 g_scanner_error(scanner, "CSS Error: left/right/center expected");
584 else if( !strcmp(hint, "margin-left") ) {
585 if(token != G_TOKEN_INT) {
586 g_scanner_error(scanner, "CSS Error: integer expected");
589 g_object_set(current_tag, "left-margin", value.v_int, "left-margin-set", TRUE, NULL);
591 else if( !strcmp(hint, "margin-right") ) {
592 if(token != G_TOKEN_INT) {
593 g_scanner_error(scanner, "CSS Error: integer expected");
596 g_object_set(current_tag, "right-margin", value.v_int, "right-margin-set", TRUE, NULL);
598 else if( !strcmp(hint, "margin-top") ) {
599 if(token != G_TOKEN_INT) {
600 g_scanner_error(scanner, "CSS Error: integer expected");
603 g_object_set(current_tag, "pixels-above-lines", value.v_int, "pixels-above-lines-set", TRUE, NULL);
605 else if( !strcmp(hint, "margin-bottom") ) {
606 if(token != G_TOKEN_INT) {
607 g_scanner_error(scanner, "CSS Error: integer expected");
610 g_object_set(current_tag, "pixels-below-lines", value.v_int, "pixels-below-lines-set", TRUE, NULL);
614 g_scanner_error(scanner, "CSS Error: invalid style hint %s", hint);
618 if( !style_accept(scanner, ';') )
624 /* Internal function: parses a glk color to a #hex-value */
626 glkcolor_to_hex(glui32 val, gchar *buffer)
628 g_return_if_fail(buffer != NULL);
630 sprintf(buffer, "#%02X%02X%02X",
631 ((val & 0xff0000) >> 16),
632 ((val & 0x00ff00) >> 8),
637 /* Internal function: parses a glk color to a GdkColor */
639 glkcolor_to_gdkcolor(glui32 val, GdkColor *color)
641 color->red = 256 * ((val & 0xff0000) >> 16);
642 color->green = 256 * ((val & 0x00ff00) >> 8);
643 color->blue = 256 * (val & 0x0000ff);
646 /* Internal function: parses a GdkColor to a glk color */
648 gdkcolor_to_glkcolor(GdkColor *color)
650 g_return_val_if_fail(color != NULL, 0);
651 return (glui32) color->pixel;
654 /* Internal function: changes a GTK tag to correspond with the given style. */
656 apply_stylehint_to_tag(GtkTextTag *tag, GtkTextTag *default_tag, glui32 wintype, glui32 hint, glsi32 val)
658 g_return_if_fail(tag != NULL);
660 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
661 GObject *tag_object = G_OBJECT(tag);
663 gint reverse_color = GPOINTER_TO_INT( g_object_get_data(tag_object, "reverse-color") );
668 case stylehint_Indentation:
669 g_object_set(tag_object, "left-margin", 5*val, "left-margin-set", TRUE, NULL);
670 g_object_set(tag_object, "right-margin", 5*val, "right-margin-set", TRUE, NULL);
673 case stylehint_ParaIndentation:
674 g_object_set(tag_object, "indent", 5*val, "indent-set", TRUE, NULL);
677 case stylehint_Justification:
679 case stylehint_just_LeftFlush: i = GTK_JUSTIFY_LEFT; break;
680 case stylehint_just_LeftRight: i = GTK_JUSTIFY_FILL; break;
681 case stylehint_just_Centered: i = GTK_JUSTIFY_CENTER; break;
682 case stylehint_just_RightFlush: i = GTK_JUSTIFY_RIGHT; break;
684 WARNING("Unknown justification");
685 i = GTK_JUSTIFY_LEFT;
687 g_object_set(tag_object, "justification", i, "justification-set", TRUE, NULL);
690 case stylehint_Weight:
692 case -1: i = PANGO_WEIGHT_LIGHT; break;
693 case 0: i = PANGO_WEIGHT_NORMAL; break;
694 case 1: i = PANGO_WEIGHT_BOLD; break;
695 default: WARNING("Unknown font weight");
697 g_object_set(tag_object, "weight", i, "weight-set", TRUE, NULL);
701 g_object_set(tag_object, "size", 14+(2*val), "size-set", TRUE, NULL);
704 case stylehint_Oblique:
705 g_object_set(tag_object, "style", val ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL, "style-set", TRUE, NULL);
708 case stylehint_Proportional:
711 GtkTextTag *font_tag = g_hash_table_lookup(
712 wintype == wintype_TextBuffer? glk_data->styles->text_buffer : glk_data->styles->text_grid,
713 val? "normal" : "preformatted");
714 g_object_get(font_tag, "family", &font_family, NULL);
715 g_object_set(tag_object, "family", font_family, "family-set", TRUE, NULL);
720 case stylehint_TextColor:
721 glkcolor_to_hex(val, color);
724 g_object_set(tag_object, "foreground", color, "foreground-set", TRUE, NULL);
726 g_object_set(tag_object, "background", color, "background-set", TRUE, NULL);
730 case stylehint_BackColor:
731 glkcolor_to_hex(val, color);
734 g_object_set(tag_object, "background", color, "background-set", TRUE, NULL);
736 g_object_set(tag_object, "foreground", color, "background-set", TRUE, NULL);
740 case stylehint_ReverseColor:
741 if(reverse_color != val) {
742 /* Flip the fore- and background colors */
743 GdkColor* foreground_color;
744 GdkColor* background_color;
745 gint f_set, b_set, df_set, db_set = 0;
746 g_object_get(tag_object, "foreground-set", &f_set, "background-set", &b_set, NULL);
747 g_object_get(default_tag, "foreground-set", &df_set, "background-set", &db_set, NULL);
750 g_object_get(tag_object, "foreground-gdk", &foreground_color, NULL);
752 g_object_get(default_tag, "foreground-gdk", &foreground_color, NULL);
754 g_object_get(tag_object, "background-gdk", &background_color, NULL);
756 g_object_get(default_tag, "background-gdk", &background_color, NULL);
759 g_object_set(tag_object, "foreground-gdk", background_color, NULL);
761 g_object_set(tag_object, "foreground", "#ffffff", NULL);
764 g_object_set(tag_object, "background-gdk", foreground_color, NULL);
766 g_object_set(tag_object, "background", "#000000", NULL);
768 g_object_set_data( tag_object, "reverse-color", GINT_TO_POINTER(val != 0) );
773 WARNING("Unknown style hint");
777 /* Internal function: queries a text tag for the value of a given style hint */
779 query_tag(GtkTextTag *tag, glui32 wintype, glui32 hint)
784 g_return_val_if_fail(tag != NULL, 0);
786 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
789 case stylehint_Indentation:
790 g_object_get(tag, "left_margin", &intval, NULL);
793 case stylehint_ParaIndentation:
794 g_object_get(tag, "indent", &intval, NULL);
797 case stylehint_Justification:
798 g_object_get(tag, "justification", &intval, NULL);
800 case GTK_JUSTIFY_LEFT: return stylehint_just_LeftFlush;
801 case GTK_JUSTIFY_FILL: return stylehint_just_LeftRight;
802 case GTK_JUSTIFY_CENTER: return stylehint_just_Centered;
803 case GTK_JUSTIFY_RIGHT: return stylehint_just_RightFlush;
805 WARNING("Unknown justification");
806 return stylehint_just_LeftFlush;
809 case stylehint_Weight:
810 g_object_get(tag, "weight", &intval, NULL);
812 case PANGO_WEIGHT_LIGHT: return -1;
813 case PANGO_WEIGHT_NORMAL: return 0;
814 case PANGO_WEIGHT_BOLD: return 1;
815 default: WARNING("Unknown font weight"); return 0;
819 g_object_get(tag, "size", &intval, NULL);
820 return (intval/2)-14;
822 case stylehint_Oblique:
823 g_object_get(tag, "style", &intval , NULL);
824 return intval == PANGO_STYLE_ITALIC ? 1 : 0;
826 case stylehint_Proportional:
827 /* Use pango_font_family_is_monospace()? */
829 gchar *font_family, *query_font_family;
830 GtkTextTag *font_tag = g_hash_table_lookup(
831 wintype == wintype_TextBuffer? glk_data->styles->text_buffer : glk_data->styles->text_grid,
833 g_object_get(font_tag, "family", &font_family, NULL);
834 g_object_get(tag, "family", &query_font_family, NULL);
835 gint retval = strcmp(font_family, query_font_family)? 0 : 1;
837 g_free(query_font_family);
841 case stylehint_TextColor:
842 g_object_get(tag, "foreground-gdk", &colval, NULL);
843 return gdkcolor_to_glkcolor(colval);
845 case stylehint_BackColor:
846 g_object_get(tag, "background-gdk", &colval, NULL);
847 return gdkcolor_to_glkcolor(colval);
849 case stylehint_ReverseColor:
850 return GPOINTER_TO_INT( g_object_get_data(G_OBJECT(tag), "reverse_color") );
853 WARNING("Unknown style hint");
861 * @wintype: The window type to set a style hint on, or %wintype_AllTypes.
862 * @styl: The style to set a hint for.
863 * @hint: The type of style hint, one of the <code>stylehint_</code> constants.
864 * @val: The style hint. The meaning of this depends on @hint.
866 * Sets a hint about the appearance of one style for a particular type of
867 * window. You can also set @wintype to %wintype_AllTypes, which sets a hint for
868 * all types of window.
870 * There is no equivalent constant to set a hint for all styles of a single
875 glk_stylehint_set(glui32 wintype, glui32 styl, glui32 hint, glsi32 val)
877 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
879 GtkTextTag *to_change, *default_tag;
880 if(wintype == wintype_TextBuffer || wintype == wintype_AllTypes) {
881 to_change = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) );
882 default_tag = g_hash_table_lookup( glk_data->styles->text_buffer, get_tag_name(styl) );
883 apply_stylehint_to_tag(to_change, default_tag, wintype_TextBuffer, hint, val);
886 if(wintype == wintype_TextGrid || wintype == wintype_AllTypes) {
887 to_change = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) );
888 default_tag = g_hash_table_lookup( glk_data->styles->text_grid, get_tag_name(styl) );
889 apply_stylehint_to_tag(to_change, default_tag, wintype_TextGrid, hint, val);
894 * glk_stylehint_clear:
895 * @wintype: The window type to set a style hint on, or %wintype_AllTypes.
896 * @styl: The style to set a hint for.
897 * @hint: The type of style hint, one of the <code>stylehint_</code> constants.
899 * Clears a hint about the appearance of one style for a particular type of
900 * window to its default value. You can also set @wintype to %wintype_AllTypes,
901 * which clears a hint for all types of window.
903 * There is no equivalent constant to reset a hint for all styles of a single
908 glk_stylehint_clear(glui32 wintype, glui32 styl, glui32 hint)
910 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
914 case wintype_TextBuffer:
915 tag = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) );
917 glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) );
920 case wintype_TextGrid:
921 tag = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) );
923 glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) );
931 * glk_style_distinguish:
932 * @win: The window in which the styles are to be distinguished.
933 * @styl1: The first style to be distinguished from the second style.
934 * @styl2: The second style to be distinguished from the first style.
936 * Decides whether two styles are visually distinguishable in the given window.
937 * The exact meaning of this is left for the library to determine.
938 * <note><title>Chimara</title><para>
939 * Currently, all styles of one window are assumed to be mutually
943 * Returns: %TRUE (1) if the two styles are visually distinguishable. If they
944 * are not, it returns %FALSE (0).
947 glk_style_distinguish(winid_t win, glui32 styl1, glui32 styl2)
950 return styl1 != styl2;
955 * @win: The window from which to take the style.
956 * @styl: The style to perform the measurement on.
957 * @hint: The stylehint to measure.
958 * @result: Address to write the result to.
960 * Tries to test an attribute of one style in the given window @win. The library
961 * may not be able to determine the attribute; if not, this returns %FALSE (0).
962 * If it can, it returns %TRUE (1) and stores the value in the location pointed
965 * As usual, it is legal for @result to be %NULL, although fairly pointless.
968 * The meaning of the value depends on the hint which was tested:
971 * <term>%stylehint_Indentation, %stylehint_ParaIndentation</term>
972 * <listitem><para>The indentation and paragraph indentation. These are in a
973 * metric which is platform-dependent.</para>
974 * <note><para>Most likely either characters or pixels.</para></note>
978 * <term>%stylehint_Justification</term>
979 * <listitem><para>One of the constants %stylehint_just_LeftFlush,
980 * %stylehint_just_LeftRight, %stylehint_just_Centered, or
981 * %stylehint_just_RightFlush.</para></listitem>
984 * <term>%stylehint_Size</term>
985 * <listitem><para>The font size. Again, this is in a platform-dependent
987 * <note><para>Pixels, points, or simply 1 if the library does not support
988 * varying font sizes.</para></note>
992 * <term>%stylehint_Weight</term>
993 * <listitem><para>1 for heavy-weight fonts (boldface), 0 for normal weight,
994 * and -1 for light-weight fonts.</para></listitem>
997 * <term>%stylehint_Oblique</term>
998 * <listitem><para>1 for oblique fonts (italic), or 0 for normal angle.</para>
1002 * <term>%stylehint_Proportional</term>
1003 * <listitem><para>1 for proportional-width fonts, or 0 for fixed-width.
1004 * </para></listitem>
1007 * <term>%stylehint_TextColor, %stylehint_BackColor</term>
1008 * <listitem><para>These are values from 0x00000000 to 0x00FFFFFF, encoded as
1009 * described in <link
1010 * linkend="chimara-Suggesting-the-Appearance-of-Styles">Suggesting the
1011 * Appearance of Styles</link>.</para></listitem>
1014 * <term>%stylehint_ReverseColor</term>
1015 * <listitem><para>0 for normal printing, 1 if the foreground and background
1016 * colors are reversed.</para></listitem>
1020 * Returns: TRUE upon successul retrieval, otherwise FALSE.
1023 glk_style_measure(winid_t win, glui32 styl, glui32 hint, glui32 *result)
1025 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
1029 case wintype_TextBuffer:
1030 tag = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) );
1032 *result = query_tag(tag, win->type, hint);
1034 case wintype_TextGrid:
1035 tag = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) );
1037 *result = query_tag(tag, win->type, hint);
1045 /* Internal function returning the current default font for a window type
1046 * This can be used later for size calculations. Only wintype_TextGrid and wintype_TextBuffer are
1047 * supported for now */
1048 PangoFontDescription *
1049 get_current_font(guint32 wintype)
1051 ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
1055 case wintype_TextGrid:
1056 normal = g_hash_table_lookup(glk_data->styles->text_grid, "normal");
1058 case wintype_TextBuffer:
1059 normal = g_hash_table_lookup(glk_data->styles->text_buffer, "normal");
1065 PangoFontDescription *font;
1066 g_object_get( G_OBJECT(normal), "font-desc", &font, NULL );
1071 /* Internal function copying the attributes of a text tag to a pango attribute list */
1073 text_tag_to_attr_list(GtkTextTag *tag, PangoAttrList *list)
1076 GdkColor *foreground, *background;
1078 PangoFontDescription *font_desc;
1079 gboolean strikethrough;
1080 PangoUnderline underline;
1082 g_object_get(tag, "foreground-set", &set, "foreground-gdk", &foreground, NULL);
1084 pango_attr_list_insert(
1086 pango_attr_foreground_new(foreground->red, foreground->green, foreground->blue)
1089 g_object_get(tag, "background-set", &set, "background-gdk", &background, NULL);
1091 pango_attr_list_insert(
1093 pango_attr_background_new(background->red, background->green, background->blue)
1096 g_object_get(tag, "language-set", &set, "language", &string, NULL);
1098 pango_attr_list_insert(
1100 pango_attr_language_new( pango_language_from_string(string) )
1104 /* Font description updates the following properties simultaniously:
1105 * family, style, weight, variant, stretch, size
1107 g_object_get(tag, "font-desc", &font_desc, NULL);
1108 pango_attr_list_insert(
1110 pango_attr_font_desc_new(font_desc)
1113 g_object_get(tag, "strikethrough-set", &set, "strikethrough", &strikethrough, NULL);
1115 pango_attr_list_insert(
1117 pango_attr_strikethrough_new(strikethrough)
1120 g_object_get(tag, "underline-set", &set, "underline", &underline, NULL);
1122 pango_attr_list_insert(
1124 pango_attr_underline_new(underline)
1129 /* Update pager and reverse video tags */
1131 style_update(ChimaraGlk *glk)
1133 CHIMARA_GLK_USE_PRIVATE(glk, priv);
1135 GtkTextTag *pager_tag = GTK_TEXT_TAG( g_hash_table_lookup(priv->styles->text_buffer, "pager") );
1136 text_tag_to_attr_list(pager_tag, priv->pager_attr_list);