X-Git-Url: https://git.stderr.nl/gitweb?p=projects%2Fchimara%2Fchimara.git;a=blobdiff_plain;f=libchimara%2Fstyle.c;h=b4aa029367a61443955c413b832235a9caea33b3;hp=c3a8e43f9bafd67e018de7cc10a72e7f9435a117;hb=523811df4155ac5a10b206cb16374d1383e108fc;hpb=a43e48ea904e764b9b7272230d4cd9e51e0505d6 diff --git a/libchimara/style.c b/libchimara/style.c index c3a8e43..b4aa029 100644 --- a/libchimara/style.c +++ b/libchimara/style.c @@ -1,48 +1,125 @@ +#include +#include +#include +#include "chimara-glk-private.h" +#include "glk.h" #include "style.h" +#include "magic.h" +#include "stream.h" +#include "strio.h" -extern ChimaraGlkPrivate *glk_data; +extern GPrivate glk_data_key; + +static gboolean style_accept(GScanner *scanner, GTokenType token); +static gboolean style_accept_style_selector(GScanner *scanner, ChimaraGlk *glk); +static gboolean style_accept_style_hint(GScanner *scanner, GtkTextTag *current_tag); +static void style_copy_tag_to_textbuffer(gpointer key, gpointer tag, gpointer target_table); +static void text_tag_to_attr_list(GtkTextTag *tag, PangoAttrList *list); +GtkTextTag* gtk_text_tag_copy(GtkTextTag *tag); +static void style_cascade_colors(GtkTextTag *tag, GtkTextTag *glk_tag, GtkTextTag *default_tag, GdkColor **foreground, GdkColor **background); /** * glk_set_style: - * @styl The style to apply + * @styl: The style to apply * - * This changes the style of the current output stream. After a style change, - * new text which is printed to that stream will be given the new style. For a - * window stream, the text will appear in that style. For other types of - * streams, this has no effect. + * Changes the style of the current output stream. @styl should be one of the + * style_ constants. However, any value is actually legal; if the + * interpreter does not recognize the style value, it will treat it as + * %style_Normal. + * + * This policy allows for the future definition of styles without breaking old + * Glk libraries. + * */ void -glk_set_style(glui32 style) +glk_set_style(glui32 styl) { + ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key); g_return_if_fail(glk_data->current_stream != NULL); - glk_set_style_stream(glk_data->current_stream, style); + glk_set_style_stream(glk_data->current_stream, styl); +} + +/* The first 11 tag names must correspond to the first 11 glk tag names as defined below */ +static const gchar* TAG_NAMES[] = { + "normal", + "emphasized", + "preformatted", + "header", + "subheader", + "alert", + "note", + "block-quote", + "input", + "user1", + "user2", + "hyperlink", + "default" +}; + +/* The first 11 glk tag names must correspond to the first 11 tag names as defined above */ +static const gchar* GLK_TAG_NAMES[] = { + "glk-normal", + "glk-emphasized", + "glk-preformatted", + "glk-header", + "glk-subheader", + "glk-alert", + "glk-note", + "glk-block-quote", + "glk-input", + "glk-user1", + "glk-user2" +}; + +const gchar** +style_get_tag_names() +{ + return TAG_NAMES; } /* Internal function: mapping from style enum to tag name */ -gchar* +static const gchar* get_tag_name(glui32 style) { - switch(style) { - case style_Normal: return "normal"; - case style_Emphasized: return "emphasized"; - case style_Preformatted: return "preformatted"; - case style_Header: return "header"; - case style_Subheader: return "subheader"; - case style_Alert: return "alert"; - case style_Note: return "note"; - case style_BlockQuote: return "block-quote"; - case style_Input: return "input"; - case style_User1: return "user1"; - case style_User2: return "user2"; + if(style >= CHIMARA_NUM_STYLES) { + WARNING("Unsupported style"); + return "normal"; + } else { + return (gchar*) TAG_NAMES[style]; } +} - WARNING("Unsupported style"); - return "normal"; +/* Internal function: mapping from glk style enum to tag name */ +static const gchar* +get_glk_tag_name(glui32 style) +{ + if(style >= style_NUMSTYLES) { + WARNING("Unsupported style"); + return "normal"; + } else { + return (gchar*) GLK_TAG_NAMES[style]; + } } +/** + * glk_set_style_stream: + * @str: Output stream to change the style of + * @styl: The style to apply + * + * This changes the style of the stream @str. See glk_set_style(). + */ void -glk_set_style_stream(strid_t stream, glui32 style) { - stream->style = get_tag_name(style); +glk_set_style_stream(strid_t str, glui32 styl) { +#ifdef DEBUG_STYLES + g_printf("glk_set_style(str->rock=%d, styl=%d)\n", str->rock, styl); +#endif + + if(str->window == NULL) + return; + + flush_window_buffer(str->window); + str->style = (gchar*) get_tag_name(styl); + str->glk_style = (gchar*) get_glk_tag_name(styl); } /* Internal function: call this to initialize the default styles to a textbuffer. */ @@ -51,52 +128,547 @@ style_init_textbuffer(GtkTextBuffer *buffer) { g_return_if_fail(buffer != NULL); - gtk_text_buffer_create_tag(buffer, "normal", NULL); - gtk_text_buffer_create_tag(buffer, "emphasized", "style", PANGO_STYLE_ITALIC, NULL); - gtk_text_buffer_create_tag(buffer, "preformatted", "font-desc", glk_data->monospace_font_desc, NULL); - gtk_text_buffer_create_tag(buffer, "header", "size-points", 16.0, "weight", PANGO_WEIGHT_BOLD, NULL); - gtk_text_buffer_create_tag(buffer, "subheader", "size-points", 12.0, "weight", PANGO_WEIGHT_BOLD, NULL); - gtk_text_buffer_create_tag(buffer, "alert", "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL); - gtk_text_buffer_create_tag(buffer, "note", "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL); - gtk_text_buffer_create_tag(buffer, "block-quote", "justification", GTK_JUSTIFY_CENTER, "style", PANGO_STYLE_ITALIC, NULL); - gtk_text_buffer_create_tag(buffer, "input", NULL); - gtk_text_buffer_create_tag(buffer, "user1", NULL); - gtk_text_buffer_create_tag(buffer, "user2", NULL); + ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key); + + /* Place the default text tags in the textbuffer's tag table */ + g_hash_table_foreach(glk_data->styles->text_buffer, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer)); + + /* Copy the override text tags to the textbuffers's tag table */ + g_hash_table_foreach(glk_data->glk_styles->text_buffer, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer)); + + /* Assign the 'default' tag the lowest priority */ + gtk_text_tag_set_priority( gtk_text_tag_table_lookup(gtk_text_buffer_get_tag_table(buffer), "default"), 0 ); +} + + +/* Internal function: call this to initialize the default styles to a textgrid. */ +void +style_init_textgrid(GtkTextBuffer *buffer) +{ + g_return_if_fail(buffer != NULL); + + ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key); + + /* Place the default text tags in the textbuffer's tag table */ + g_hash_table_foreach(glk_data->styles->text_grid, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer)); + + /* Copy the current text tags to the textbuffers's tag table */ + g_hash_table_foreach(glk_data->glk_styles->text_grid, style_copy_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer)); + + /* Assign the 'default' tag the lowest priority */ + gtk_text_tag_set_priority( gtk_text_tag_table_lookup(gtk_text_buffer_get_tag_table(buffer), "default"), 0 ); +} + +/* Internal function used to iterate over a style table, copying it */ +static void +style_copy_tag_to_textbuffer(gpointer key, gpointer tag, gpointer target_table) +{ + g_return_if_fail(key != NULL); + g_return_if_fail(tag != NULL); + g_return_if_fail(target_table != NULL); + + gtk_text_tag_table_add(target_table, gtk_text_tag_copy( GTK_TEXT_TAG(tag) )); +} + +/* Internal function that copies a text tag */ +GtkTextTag * +gtk_text_tag_copy(GtkTextTag *tag) +{ + GtkTextTag *copy; + char *tag_name; + GParamSpec **properties; + unsigned nprops, count; + + g_return_val_if_fail(tag != NULL, NULL); + + g_object_get(tag, "name", &tag_name, NULL); + copy = gtk_text_tag_new(tag_name); + g_free(tag_name); + + /* Copy all the original tag's properties to the new tag */ + properties = g_object_class_list_properties( G_OBJECT_GET_CLASS(tag), &nprops ); + for(count = 0; count < nprops; count++) { + + /* Only copy properties that are readable, writable, not construct-only, + and not deprecated */ + GParamFlags flags = properties[count]->flags; + if(flags & G_PARAM_CONSTRUCT_ONLY + || flags & G_PARAM_DEPRECATED + || !(flags & G_PARAM_READABLE) + || !(flags & G_PARAM_WRITABLE)) + continue; + + const char *prop_name = g_param_spec_get_name(properties[count]); + GValue prop_value = G_VALUE_INIT; + + g_value_init( &prop_value, G_PARAM_SPEC_VALUE_TYPE(properties[count]) ); + g_object_get_property( G_OBJECT(tag), prop_name, &prop_value ); + /* Don't copy the PangoTabArray if it is NULL, that prints a warning */ + if(strcmp(prop_name, "tabs") == 0 && g_value_get_boxed(&prop_value) == NULL) { + g_value_unset(&prop_value); + continue; + } + g_object_set_property( G_OBJECT(copy), prop_name, &prop_value ); + g_value_unset(&prop_value); + } + g_free(properties); + + /* Copy the data that was added manually */ + gpointer reverse_color = g_object_get_data( G_OBJECT(tag), "reverse-color" ); + + if(reverse_color) { + g_object_set_data( G_OBJECT(copy), "reverse-color", reverse_color ); + } + + return copy; +} + +/* Internal function that constructs the default styles */ +void +style_init(ChimaraGlk *glk) +{ + CHIMARA_GLK_USE_PRIVATE(glk, priv); + + GHashTable *default_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref); + GHashTable *default_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref); + GtkTextTag *tag; + + /* Initialise the default styles for a text grid */ + tag = gtk_text_tag_new("default"); + g_object_set(tag, "family", "Monospace", "family-set", TRUE, NULL); + g_hash_table_insert(default_text_grid_styles, "default", tag); + + tag = gtk_text_tag_new("normal"); + g_hash_table_insert(default_text_grid_styles, "normal", tag); + + tag = gtk_text_tag_new("emphasized"); + g_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL); + g_hash_table_insert(default_text_grid_styles, "emphasized", tag); + + tag = gtk_text_tag_new("preformatted"); + g_hash_table_insert(default_text_grid_styles, "preformatted", tag); + + tag = gtk_text_tag_new("header"); + g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL); + g_hash_table_insert(default_text_grid_styles, "header", tag); + + tag = gtk_text_tag_new("subheader"); + g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL); + g_hash_table_insert(default_text_grid_styles, "subheader", tag); + + tag = gtk_text_tag_new("alert"); + g_object_set(tag, "foreground", "#aa0000", "foreground-set", TRUE, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL); + g_hash_table_insert(default_text_grid_styles, "alert", tag); + + tag = gtk_text_tag_new("note"); + g_object_set(tag, "foreground", "#aaaa00", "foreground-set", TRUE, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL); + g_hash_table_insert(default_text_grid_styles, "note", tag); + + tag = gtk_text_tag_new("block-quote"); + g_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL); + g_hash_table_insert(default_text_grid_styles, "block-quote", tag); + + tag = gtk_text_tag_new("input"); + g_hash_table_insert(default_text_grid_styles, "input", tag); + + tag = gtk_text_tag_new("user1"); + g_hash_table_insert(default_text_grid_styles, "user1", tag); + + tag = gtk_text_tag_new("user2"); + g_hash_table_insert(default_text_grid_styles, "user2", tag); + + tag = gtk_text_tag_new("hyperlink"); + g_object_set(tag, "foreground", "#0000ff", "foreground-set", TRUE, "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL); + g_hash_table_insert(default_text_grid_styles, "hyperlink", tag); + + /* Initialise the default styles for a text buffer */ + tag = gtk_text_tag_new("default"); + g_object_set(tag, "family", "Serif", "family-set", TRUE, NULL); + g_hash_table_insert(default_text_buffer_styles, "default", tag); + + tag = gtk_text_tag_new("normal"); + g_hash_table_insert(default_text_buffer_styles, "normal", tag); + + tag = gtk_text_tag_new("emphasized"); + g_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL); + g_hash_table_insert(default_text_buffer_styles, "emphasized", tag); + + tag = gtk_text_tag_new("preformatted"); + g_object_set(tag, "family", "Monospace", "family-set", TRUE, NULL); + g_hash_table_insert(default_text_buffer_styles, "preformatted", tag); + + tag = gtk_text_tag_new("header"); + g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL); + g_hash_table_insert(default_text_buffer_styles, "header", tag); + + tag = gtk_text_tag_new("subheader"); + g_object_set(tag, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL); + g_hash_table_insert(default_text_buffer_styles, "subheader", tag); + + tag = gtk_text_tag_new("alert"); + g_object_set(tag, "foreground", "#aa0000", "foreground-set", TRUE, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL); + g_hash_table_insert(default_text_buffer_styles, "alert", tag); + + tag = gtk_text_tag_new("note"); + g_object_set(tag, "foreground", "#aaaa00", "foreground-set", TRUE, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL); + g_hash_table_insert(default_text_buffer_styles, "note", tag); + + tag = gtk_text_tag_new("block-quote"); + g_object_set(tag, "justification", GTK_JUSTIFY_CENTER, "justification-set", TRUE, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL); + g_hash_table_insert(default_text_buffer_styles, "block-quote", tag); + + tag = gtk_text_tag_new("input"); + g_hash_table_insert(default_text_buffer_styles, "input", tag); + + tag = gtk_text_tag_new("user1"); + g_hash_table_insert(default_text_buffer_styles, "user1", tag); + + tag = gtk_text_tag_new("user2"); + g_hash_table_insert(default_text_buffer_styles, "user2", tag); + + tag = gtk_text_tag_new("hyperlink"); + g_object_set(tag, "foreground", "#0000ff", "foreground-set", TRUE, "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL); + g_hash_table_insert(default_text_buffer_styles, "hyperlink", tag); + + priv->styles->text_grid = default_text_grid_styles; + priv->styles->text_buffer = default_text_buffer_styles; + + style_reset_glk(glk); +} + +/* Reset the style hints set from the Glk program to be blank. Call this when +starting a new game so that style hints from the previous game don't carry +over. */ +void +style_reset_glk(ChimaraGlk *glk) +{ + CHIMARA_GLK_USE_PRIVATE(glk, priv); + + GHashTable *glk_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref); + GHashTable *glk_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref); + GtkTextTag *tag; + + /* Initialize the GLK styles to empty tags */ + int i; + for(i=0; iglk_styles->text_grid = glk_text_grid_styles; + priv->glk_styles->text_buffer = glk_text_buffer_styles; + +} + +/* Reset style tables to the library's internal defaults */ +void +reset_default_styles(ChimaraGlk *glk) +{ + /* TODO: write this function */ +} + +/* Create the CSS file scanner */ +GScanner * +create_css_file_scanner(void) +{ + GScanner *scanner = g_scanner_new(NULL); + scanner->config->cset_identifier_first = G_CSET_a_2_z G_CSET_A_2_Z "#"; + scanner->config->cset_identifier_nth = G_CSET_a_2_z G_CSET_A_2_Z "-_" G_CSET_DIGITS; + scanner->config->symbol_2_token = TRUE; + scanner->config->cpair_comment_single = NULL; + scanner->config->scan_float = FALSE; + return scanner; +} + +/* Run the scanner over the CSS file, overriding the default styles */ +void +scan_css_file(GScanner *scanner, ChimaraGlk *glk) +{ + while( g_scanner_peek_next_token(scanner) != G_TOKEN_EOF) { + if( !style_accept_style_selector(scanner, glk) ) + break; + } + + g_scanner_destroy(scanner); +} + +/* Internal function: parses a token */ +static gboolean +style_accept(GScanner *scanner, GTokenType token) +{ + GTokenType next = g_scanner_get_next_token(scanner); + if(next != token) { + g_scanner_unexp_token(scanner, token, NULL, NULL, NULL, "CSS Error", 1); + return FALSE; + } + return TRUE; +} + +/* Internal function: parses a style selector */ +static gboolean +style_accept_style_selector(GScanner *scanner, ChimaraGlk *glk) +{ + CHIMARA_GLK_USE_PRIVATE(glk, priv); + + GtkTextTag *current_tag; + gchar *field; + GTokenType token = g_scanner_get_next_token(scanner); + GTokenValue value = g_scanner_cur_value(scanner); + + if( + token != G_TOKEN_IDENTIFIER || + ( strcmp(value.v_identifier, "buffer") && strcmp(value.v_identifier, "grid") ) + ) { + g_scanner_error(scanner, "CSS Error: buffer/grid expected"); + return FALSE; + } + + field = g_strdup(value.v_identifier); + + /* Parse the tag name to change */ + if( g_scanner_peek_next_token(scanner) == '{') { + style_accept(scanner, '{'); + if( !strcmp(field, "buffer") ) + current_tag = g_hash_table_lookup(priv->styles->text_buffer, "default"); + else + current_tag = g_hash_table_lookup(priv->styles->text_grid, "default"); + } else { + if( !style_accept(scanner, '.') ) + return FALSE; + + token = g_scanner_get_next_token(scanner); + value = g_scanner_cur_value(scanner); + + if(token != G_TOKEN_IDENTIFIER) { + g_scanner_error(scanner, "CSS Error: style selector expected"); + return FALSE; + } + + if( !strcmp(field, "buffer") ) + current_tag = g_hash_table_lookup(priv->styles->text_buffer, value.v_identifier); + else + current_tag = g_hash_table_lookup(priv->styles->text_grid, value.v_identifier); + + if(current_tag == NULL) { + g_scanner_error(scanner, "CSS Error: invalid style identifier"); + return FALSE; + } + + if( !style_accept(scanner, '{') ) + return FALSE; + } + + while( g_scanner_peek_next_token(scanner) != '}') { + if( !style_accept_style_hint(scanner, current_tag) ) + return FALSE; + } + + if( !style_accept(scanner, '}') ) + return FALSE; + + return TRUE; +} + +/* Internal function: parses a style hint */ +static gboolean +style_accept_style_hint(GScanner *scanner, GtkTextTag *current_tag) +{ + GTokenType token = g_scanner_get_next_token(scanner); + GTokenValue value = g_scanner_cur_value(scanner); + gchar *hint; + + if(token != G_TOKEN_IDENTIFIER) { + g_scanner_error(scanner, "CSS Error: style hint expected"); + return FALSE; + } + + hint = g_strdup(value.v_identifier); + + if( !style_accept(scanner, ':') ) + return FALSE; + + token = g_scanner_get_next_token(scanner); + value = g_scanner_cur_value(scanner); + + if( !strcmp(hint, "font-family") ) { + if(token != G_TOKEN_STRING) { + g_scanner_error(scanner, "CSS Error: string expected"); + return FALSE; + } + g_object_set(current_tag, "family", value.v_string, "family-set", TRUE, NULL); + } + else if( !strcmp(hint, "font-weight") ) { + if(token != G_TOKEN_IDENTIFIER) { + g_scanner_error(scanner, "CSS Error: bold/normal expected"); + return FALSE; + } + + if( !strcmp(value.v_identifier, "bold") ) + g_object_set(current_tag, "weight", PANGO_WEIGHT_BOLD, "weight-set", TRUE, NULL); + else if( !strcmp(value.v_identifier, "normal") ) + g_object_set(current_tag, "weight", PANGO_WEIGHT_NORMAL, "weight-set", TRUE, NULL); + else { + g_scanner_error(scanner, "CSS Error: bold/normal expected"); + return FALSE; + } + } + else if( !strcmp(hint, "font-style") ) { + if(token != G_TOKEN_IDENTIFIER) { + g_scanner_error(scanner, "CSS Error: italic/normal expected"); + return FALSE; + } + + if( !strcmp(value.v_identifier, "italic") ) + g_object_set(current_tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL); + else if( !strcmp(value.v_identifier, "normal") ) + g_object_set(current_tag, "style", PANGO_STYLE_NORMAL, "style-set", TRUE, NULL); + else { + g_scanner_error(scanner, "CSS Error: italic/normal expected"); + return FALSE; + } + } + else if( !strcmp(hint, "font-size") ) { + if(token == G_TOKEN_INT) + g_object_set(current_tag, "size-points", (float)value.v_int, "size-set", TRUE, NULL); + else if(token == G_TOKEN_FLOAT) + g_object_set(current_tag, "size-points", value.v_float, "size-set", TRUE, NULL); + else { + g_scanner_error(scanner, "CSS Error: integer or float expected"); + return FALSE; + } + } + else if( !strcmp(hint, "color") ) { + if(token != G_TOKEN_IDENTIFIER) { + g_scanner_error(scanner, "CSS Error: hex color expected"); + return FALSE; + } + + g_object_set(current_tag, "foreground", value.v_identifier, "foreground-set", TRUE, NULL); + } + else if( !strcmp(hint, "background-color") ) { + if(token != G_TOKEN_IDENTIFIER) { + g_scanner_error(scanner, "CSS Error: hex color expected"); + return FALSE; + } + g_object_set(current_tag, "background", value.v_identifier, "background-set", TRUE, NULL); + } + else if( !strcmp(hint, "text-align") ) { + if(token != G_TOKEN_IDENTIFIER) { + g_scanner_error(scanner, "CSS Error: left/right/center expected"); + return FALSE; + } + + if( !strcmp(value.v_identifier, "left") ) + g_object_set(current_tag, "justification", GTK_JUSTIFY_LEFT, "justification-set", TRUE, NULL); + else if( !strcmp(value.v_identifier, "right") ) + g_object_set(current_tag, "justification", GTK_JUSTIFY_RIGHT, "justification-set", TRUE, NULL); + else if( !strcmp(value.v_identifier, "center") ) + g_object_set(current_tag, "justification", GTK_JUSTIFY_CENTER, "justification-set", TRUE, NULL); + else { + g_scanner_error(scanner, "CSS Error: left/right/center expected"); + return FALSE; + } + } + else if( !strcmp(hint, "margin-left") ) { + if(token != G_TOKEN_INT) { + g_scanner_error(scanner, "CSS Error: integer expected"); + return FALSE; + } + g_object_set(current_tag, "left-margin", value.v_int, "left-margin-set", TRUE, NULL); + } + else if( !strcmp(hint, "margin-right") ) { + if(token != G_TOKEN_INT) { + g_scanner_error(scanner, "CSS Error: integer expected"); + return FALSE; + } + g_object_set(current_tag, "right-margin", value.v_int, "right-margin-set", TRUE, NULL); + } + else if( !strcmp(hint, "margin-top") ) { + if(token != G_TOKEN_INT) { + g_scanner_error(scanner, "CSS Error: integer expected"); + return FALSE; + } + g_object_set(current_tag, "pixels-above-lines", value.v_int, "pixels-above-lines-set", TRUE, NULL); + } + else if( !strcmp(hint, "margin-bottom") ) { + if(token != G_TOKEN_INT) { + g_scanner_error(scanner, "CSS Error: integer expected"); + return FALSE; + } + g_object_set(current_tag, "pixels-below-lines", value.v_int, "pixels-below-lines-set", TRUE, NULL); + } + + else { + g_scanner_error(scanner, "CSS Error: invalid style hint %s", hint); + return FALSE; + } + + if( !style_accept(scanner, ';') ) + return FALSE; + + return TRUE; } +/* Internal function: parses a glk color to a GdkColor */ void -color_format(glui32 val, gchar *buffer) +glkcolor_to_gdkcolor(glui32 val, GdkColor *color) +{ + color->red = 256 * ((val & 0xff0000) >> 16); + color->green = 256 * ((val & 0x00ff00) >> 8); + color->blue = 256 * (val & 0x0000ff); +} + +/* Internal function: parses a glk color to a hex string */ +gchar* +glkcolor_to_hex(glui32 val) +{ + return g_strdup_printf("%04X%04X%04X", + 256 * ((val & 0xff0000) >> 16), + 256 * ((val & 0x00ff00) >> 8), + 256 * (val & 0x0000ff) + ); +} + +/* Internal function: parses a gdk color to a hex string */ +gchar* +gdkcolor_to_hex(GdkColor *color) { - sprintf(buffer, "#%02X%02X%02X", - ((val & 0xff0000) >> 16), - ((val & 0x00ff00) >> 8), - (val & 0x0000ff) + return g_strdup_printf("%04X%04X%04X", + color->red, color->green, color->blue ); } +/* Internal function: parses a GdkColor to a glk color */ +static glui32 +gdkcolor_to_glkcolor(GdkColor *color) +{ + g_return_val_if_fail(color != NULL, 0); + return (glui32) color->pixel; +} + /* Internal function: changes a GTK tag to correspond with the given style. */ -void -apply_stylehint_to_tag(GtkTextTag *tag, glui32 hint, glsi32 val) +static void +apply_stylehint_to_tag(GtkTextTag *tag, glui32 wintype, glui32 styl, glui32 hint, glsi32 val) { g_return_if_fail(tag != NULL); + ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key); GObject *tag_object = G_OBJECT(tag); - gint reverse_color = 0; - /* FIXME where should we keep track of this? - g_object_get(tag, "reverse_color", &reverse_color, NULL); - */ + gint reverse_color = GPOINTER_TO_INT( g_object_get_data(tag_object, "reverse-color") ); int i = 0; - gchar color[20]; + GdkColor color; switch(hint) { case stylehint_Indentation: - g_object_set(tag_object, "left_margin", 5*val, NULL); - g_object_set(tag_object, "right_margin", 5*val, NULL); + g_object_set(tag_object, "left-margin", 5*val, "left-margin-set", TRUE, NULL); + g_object_set(tag_object, "right-margin", 5*val, "right-margin-set", TRUE, NULL); break; case stylehint_ParaIndentation: - g_object_set(tag_object, "indent", 5*val, NULL); + g_object_set(tag_object, "indent", 5*val, "indent-set", TRUE, NULL); break; case stylehint_Justification: @@ -109,7 +681,7 @@ apply_stylehint_to_tag(GtkTextTag *tag, glui32 hint, glsi32 val) WARNING("Unknown justification"); i = GTK_JUSTIFY_LEFT; } - g_object_set(tag_object, "justification", i, NULL); + g_object_set(tag_object, "justification", i, "justification-set", TRUE, NULL); break; case stylehint_Weight: @@ -119,90 +691,616 @@ apply_stylehint_to_tag(GtkTextTag *tag, glui32 hint, glsi32 val) case 1: i = PANGO_WEIGHT_BOLD; break; default: WARNING("Unknown font weight"); } - g_object_set(tag_object, "weight", i, NULL); + g_object_set(tag_object, "weight", i, "weight-set", TRUE, NULL); break; case stylehint_Size: - g_object_set(tag_object, "size", 14+(2*val), NULL); + { + gdouble scale = PANGO_SCALE_MEDIUM; + switch(val) { + case -3: scale = PANGO_SCALE_XX_SMALL; break; + case -2: scale = PANGO_SCALE_X_SMALL; break; + case -1: scale = PANGO_SCALE_SMALL; break; + case 0: scale = PANGO_SCALE_MEDIUM; break; + case 1: scale = PANGO_SCALE_LARGE; break; + case 2: scale = PANGO_SCALE_X_LARGE; break; + case 3: scale = PANGO_SCALE_XX_LARGE; break; + default: + /* We follow Pango's convention of having each magnification + step be a scaling of 1.2 */ + scale = pow(1.2, (double)val); + } + g_object_set(tag_object, "scale", scale, "scale-set", TRUE, NULL); + } break; case stylehint_Oblique: - g_object_set(tag_object, "style", val ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL, NULL); + g_object_set(tag_object, "style", val ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL, "style-set", TRUE, NULL); break; case stylehint_Proportional: - g_object_set(tag_object, "font-desc", val ? glk_data->default_font_desc : glk_data->monospace_font_desc, NULL); + { + gchar *font_family; + gboolean family_set; + + if(wintype != wintype_TextBuffer) { + if(val) + WARNING("Style hint 'propotional' only supported on text buffers."); + + break; + } + + GtkTextTag *font_tag = g_hash_table_lookup(glk_data->styles->text_buffer, val? "default" : "preformatted"); + g_object_get(font_tag, "family", &font_family, "family-set", &family_set, NULL); + g_object_set(tag_object, "family", font_family, "family-set", family_set, NULL); + g_free(font_family); + } break; case stylehint_TextColor: - color_format(val, color); + glkcolor_to_gdkcolor(val, &color); if(!reverse_color) - g_object_set(tag_object, "foreground", color, NULL); + g_object_set(tag_object, "foreground-gdk", &color, "foreground-set", TRUE, NULL); else - g_object_set(tag_object, "background", color, NULL); + g_object_set(tag_object, "background-gdk", &color, "background-set", TRUE, NULL); break; case stylehint_BackColor: - color_format(val, color); + glkcolor_to_gdkcolor(val, &color); if(!reverse_color) - g_object_set(tag_object, "background", color, NULL); + g_object_set(tag_object, "background-gdk", &color, "background-set", TRUE, NULL); else - g_object_set(tag_object, "foreground", color, NULL); + g_object_set(tag_object, "foreground-gdk", &color, "background-set", TRUE, NULL); break; case stylehint_ReverseColor: - if(reverse_color != val) { + { + // Determine the current colors + + // If all fails, use black/white + // FIXME: Use system theme here + GdkColor foreground, background; + gdk_color_parse("black", &foreground); + gdk_color_parse("white", &background); + GdkColor *current_foreground = &foreground; + GdkColor *current_background = &background; + + if(wintype == wintype_TextBuffer) { + GtkTextTag* default_tag = g_hash_table_lookup(glk_data->styles->text_buffer, "default"); + GtkTextTag* base_tag = g_hash_table_lookup(glk_data->styles->text_buffer, get_tag_name(styl)); + style_cascade_colors(base_tag, tag, default_tag, ¤t_foreground, ¤t_background); + } + else if(wintype == wintype_TextGrid) { + GtkTextTag* default_tag = g_hash_table_lookup(glk_data->styles->text_grid, "default"); + GtkTextTag* base_tag = g_hash_table_lookup(glk_data->styles->text_grid, get_tag_name(styl)); + style_cascade_colors(base_tag, tag, default_tag, ¤t_foreground, ¤t_background); + } + + if(val) { /* Flip the fore- and background colors */ - gchar* foreground_color; - gchar* background_color; - g_object_get(tag_object, "foreground", &foreground_color, NULL); - g_object_get(tag_object, "background", &background_color, NULL); - g_object_set(tag_object, "foreground", background_color, NULL); - g_object_set(tag_object, "background", foreground_color, NULL); - g_free(foreground_color); - g_free(background_color); + GdkColor *temp = current_foreground; + current_foreground = current_background; + current_background = temp; } + + g_object_set(tag, + "foreground-gdk", current_foreground, + "foreground-set", TRUE, + "background-gdk", current_background, + "background-set", TRUE, + NULL + ); + + g_object_set_data( tag_object, "reverse-color", GINT_TO_POINTER(val != 0) ); break; + } default: WARNING("Unknown style hint"); } } -void -glk_stylehint_set(glui32 wintype, glui32 style, glui32 hint, glsi32 val) +/* Internal function: queries a text tag for the value of a given style hint */ +static gint +query_tag(GtkTextTag *tag, glui32 wintype, glui32 hint) { + gint intval; + gdouble doubleval; + GdkColor *colval; - gchar *tag_name = get_tag_name(style); + g_return_val_if_fail(tag != NULL, 0); - /* Iterate over all the window and update their styles if nessecary */ - winid_t win = glk_window_iterate(NULL, NULL); - while(win != NULL) { - if(wintype != wintype_TextBuffer) - continue; /* FIXME: add support for text grid windows */ + ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key); + + switch(hint) { + case stylehint_Indentation: + g_object_get(tag, "left_margin", &intval, NULL); + return intval/5; + + case stylehint_ParaIndentation: + g_object_get(tag, "indent", &intval, NULL); + return intval/5; - if(wintype == wintype_AllTypes || glk_window_get_type(win) == wintype) { - GtkWidget *textview = win->widget; - GtkTextBuffer *textbuffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW(textview) ); - GtkTextTagTable *table = gtk_text_buffer_get_tag_table(textbuffer); - GtkTextTag *to_change = gtk_text_tag_table_lookup(table, tag_name); + case stylehint_Justification: + g_object_get(tag, "justification", &intval, NULL); + switch(intval) { + case GTK_JUSTIFY_LEFT: return stylehint_just_LeftFlush; + case GTK_JUSTIFY_FILL: return stylehint_just_LeftRight; + case GTK_JUSTIFY_CENTER: return stylehint_just_Centered; + case GTK_JUSTIFY_RIGHT: return stylehint_just_RightFlush; + default: + WARNING("Unknown justification"); + return stylehint_just_LeftFlush; + } - apply_stylehint_to_tag(to_change, hint, val); + case stylehint_Weight: + g_object_get(tag, "weight", &intval, NULL); + switch(intval) { + case PANGO_WEIGHT_LIGHT: return -1; + case PANGO_WEIGHT_NORMAL: return 0; + case PANGO_WEIGHT_BOLD: return 1; + default: WARNING("Unknown font weight"); return 0; } + + case stylehint_Size: + g_object_get(tag, "scale", &doubleval, NULL); + return (gint)round(log(doubleval) / log(1.2)); + + case stylehint_Oblique: + g_object_get(tag, "style", &intval , NULL); + return intval == PANGO_STYLE_ITALIC ? 1 : 0; + + case stylehint_Proportional: + /* Use pango_font_family_is_monospace()? */ + { + gchar *font_family, *query_font_family; + GtkTextTag *font_tag = g_hash_table_lookup( + wintype == wintype_TextBuffer? glk_data->styles->text_buffer : glk_data->styles->text_grid, + "preformatted"); + g_object_get(font_tag, "family", &font_family, NULL); + g_object_get(tag, "family", &query_font_family, NULL); + gint retval = strcmp(font_family, query_font_family)? 0 : 1; + g_free(font_family); + g_free(query_font_family); + return retval; + } + + case stylehint_TextColor: + g_object_get(tag, "foreground-gdk", &colval, NULL); + return gdkcolor_to_glkcolor(colval); + + case stylehint_BackColor: + g_object_get(tag, "background-gdk", &colval, NULL); + return gdkcolor_to_glkcolor(colval); + + case stylehint_ReverseColor: + return GPOINTER_TO_INT( g_object_get_data(G_OBJECT(tag), "reverse_color") ); + + default: + WARNING("Unknown style hint"); + } + + return 0; +} + +/** + * glk_stylehint_set: + * @wintype: The window type to set a style hint on, or %wintype_AllTypes. + * @styl: The style to set a hint for. + * @hint: The type of style hint, one of the stylehint_ constants. + * @val: The style hint. The meaning of this depends on @hint. + * + * Sets a hint about the appearance of one style for a particular type of + * window. You can also set @wintype to %wintype_AllTypes, which sets a hint for + * all types of window. + * + * There is no equivalent constant to set a hint for all styles of a single + * window type. + * + */ +void +glk_stylehint_set(glui32 wintype, glui32 styl, glui32 hint, glsi32 val) +{ +#ifdef DEBUG_STYLES + g_printf("glk_stylehint_set(wintype=%d, styl=%d, hint=%d, val=%d)\n", wintype, styl, hint, val); +#endif + + ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key); + + GtkTextTag *to_change; + if(wintype == wintype_TextBuffer || wintype == wintype_AllTypes) { + to_change = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) ); + apply_stylehint_to_tag(to_change, wintype_TextBuffer, styl, hint, val); + } + + if(wintype == wintype_TextGrid || wintype == wintype_AllTypes) { + to_change = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) ); + apply_stylehint_to_tag(to_change, wintype_TextGrid, styl, hint, val); } } +/** + * glk_stylehint_clear: + * @wintype: The window type to set a style hint on, or %wintype_AllTypes. + * @styl: The style to set a hint for. + * @hint: The type of style hint, one of the stylehint_ constants. + * + * Clears a hint about the appearance of one style for a particular type of + * window to its default value. You can also set @wintype to %wintype_AllTypes, + * which clears a hint for all types of window. + * + * There is no equivalent constant to reset a hint for all styles of a single + * window type. + * + */ void glk_stylehint_clear(glui32 wintype, glui32 styl, glui32 hint) { +#ifdef DEBUG_STYLES + g_printf("glk_stylehint_clear(wintype=%d, styl=%d, hint=%d)\n", wintype, styl, hint); +#endif + + ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key); + GtkTextTag *tag; + + switch(wintype) { + case wintype_TextBuffer: + tag = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) ); + if(tag) { + glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) ); + } + break; + case wintype_TextGrid: + tag = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) ); + if(tag) { + glk_stylehint_set( wintype, styl, hint, query_tag(tag, wintype, hint) ); + } + default: + return; + } } +/** + * glk_style_distinguish: + * @win: The window in which the styles are to be distinguished. + * @styl1: The first style to be distinguished from the second style. + * @styl2: The second style to be distinguished from the first style. + * + * Decides whether two styles are visually distinguishable in the given window. + * The exact meaning of this is left for the library to determine. + * Chimara + * Currently, all styles of one window are assumed to be mutually + * distinguishable. + * + * + * Returns: %TRUE (1) if the two styles are visually distinguishable. If they + * are not, it returns %FALSE (0). + */ glui32 glk_style_distinguish(winid_t win, glui32 styl1, glui32 styl2) { +#ifdef DEBUG_STYLES + g_printf("glk_style_distinguish(win->rock=%d, styl1=%d, styl2=%d)\n", win->rock, styl1, styl2); +#endif + + /* FIXME */ return styl1 != styl2; } + +/** + * glk_style_measure: + * @win: The window from which to take the style. + * @styl: The style to perform the measurement on. + * @hint: The stylehint to measure. + * @result: Address to write the result to. + * + * Tries to test an attribute of one style in the given window @win. The library + * may not be able to determine the attribute; if not, this returns %FALSE (0). + * If it can, it returns %TRUE (1) and stores the value in the location pointed + * at by @result. + * + * As usual, it is legal for @result to be %NULL, although fairly pointless. + * + * + * The meaning of the value depends on the hint which was tested: + * + * + * %stylehint_Indentation, %stylehint_ParaIndentation + * The indentation and paragraph indentation. These are in a + * metric which is platform-dependent. + * Most likely either characters or pixels. + * + * + * + * %stylehint_Justification + * One of the constants %stylehint_just_LeftFlush, + * %stylehint_just_LeftRight, %stylehint_just_Centered, or + * %stylehint_just_RightFlush. + * + * + * %stylehint_Size + * The font size. Again, this is in a platform-dependent + * metric. + * Pixels, points, or simply 1 if the library does not support + * varying font sizes. + * + * + * + * %stylehint_Weight + * 1 for heavy-weight fonts (boldface), 0 for normal weight, + * and -1 for light-weight fonts. + * + * + * %stylehint_Oblique + * 1 for oblique fonts (italic), or 0 for normal angle. + * + * + * + * %stylehint_Proportional + * 1 for proportional-width fonts, or 0 for fixed-width. + * + * + * + * %stylehint_TextColor, %stylehint_BackColor + * These are values from 0x00000000 to 0x00FFFFFF, encoded as + * described in Suggesting the + * Appearance of Styles. + * + * + * %stylehint_ReverseColor + * 0 for normal printing, 1 if the foreground and background + * colors are reversed. + * + * + * Signed values, such as the %stylehint_Weight value, are cast to + * glui32. They may be cast to glsi32 to be dealt with + * in a more natural context. + * + * Returns: TRUE upon successul retrieval, otherwise FALSE. + */ +glui32 +glk_style_measure(winid_t win, glui32 styl, glui32 hint, glui32 *result) +{ +#ifdef DEBUG_STYLES + g_printf("glk_style_measure(win->rock=%d, styl=%d, hint=%d, result=...)\n", win->rock, styl, hint); +#endif + + ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key); + GtkTextTag *tag; + + switch(win->type) { + case wintype_TextBuffer: + tag = g_hash_table_lookup( glk_data->glk_styles->text_buffer, get_glk_tag_name(styl) ); + if(result) + *result = query_tag(tag, win->type, hint); + break; + case wintype_TextGrid: + tag = g_hash_table_lookup( glk_data->glk_styles->text_grid, get_glk_tag_name(styl) ); + if(result) + *result = query_tag(tag, win->type, hint); + default: + return FALSE; + } + + return TRUE; +} + +/* Internal function returning the current default font for a window type + * This can be used later for size calculations. Only wintype_TextGrid and wintype_TextBuffer are + * supported for now */ +PangoFontDescription * +get_current_font(guint32 wintype) +{ + ChimaraGlkPrivate *glk_data = g_private_get(&glk_data_key); + GHashTable *styles, *glk_styles; + PangoFontDescription *font; + + switch(wintype) { + case wintype_TextGrid: + styles = glk_data->styles->text_grid; + glk_styles = glk_data->glk_styles->text_grid; + font = pango_font_description_from_string("Monospace"); + break; + case wintype_TextBuffer: + styles = glk_data->styles->text_buffer; + glk_styles = glk_data->glk_styles->text_buffer; + font = pango_font_description_from_string("Serif"); + break; + default: + return NULL; + } + + PangoAttrList *list = pango_attr_list_new(); + + text_tag_to_attr_list( g_hash_table_lookup(styles, "default"), list ); + PangoAttrIterator *it = pango_attr_list_get_iterator(list); + pango_attr_iterator_get_font(it, font, NULL, NULL); + pango_attr_iterator_destroy(it); + + text_tag_to_attr_list( g_hash_table_lookup(styles, "normal"), list ); + it = pango_attr_list_get_iterator(list); + pango_attr_iterator_get_font(it, font, NULL, NULL); + pango_attr_iterator_destroy(it); + + text_tag_to_attr_list( g_hash_table_lookup(glk_styles, "glk-normal"), list ); + it = pango_attr_list_get_iterator(list); + pango_attr_iterator_get_font(it, font, NULL, NULL); + pango_attr_iterator_destroy(it); + + /* Make a copy of the family, preventing it's destruction at the end of this function. */ + pango_font_description_set_family( font, pango_font_description_get_family(font) ); + + pango_attr_list_unref(list); + + return font; +} + +/* Internal function copying the attributes of a text tag to a pango attribute list */ +static void +text_tag_to_attr_list(GtkTextTag *tag, PangoAttrList *list) +{ + gboolean set; + GdkColor *foreground, *background; + gchar *string; + PangoFontDescription *font_desc; + gboolean strikethrough; + PangoUnderline underline; + + g_object_get(tag, "foreground-set", &set, "foreground-gdk", &foreground, NULL); + if(set) { + pango_attr_list_insert( + list, + pango_attr_foreground_new(foreground->red, foreground->green, foreground->blue) + ); + } + g_object_get(tag, "background-set", &set, "background-gdk", &background, NULL); + if(set) { + pango_attr_list_insert( + list, + pango_attr_background_new(background->red, background->green, background->blue) + ); + } + g_object_get(tag, "language-set", &set, "language", &string, NULL); + if(set) { + pango_attr_list_insert( + list, + pango_attr_language_new( pango_language_from_string(string) ) + ); + } + + /* Font description updates the following properties simultaniously: + * family, style, weight, variant, stretch, size. + * FIXME: Except it doesn't really. + */ + g_object_get(tag, "font-desc", &font_desc, NULL); + pango_attr_list_insert( + list, + pango_attr_font_desc_new(font_desc) + ); + + g_object_get(tag, "strikethrough-set", &set, "strikethrough", &strikethrough, NULL); + if(set) { + pango_attr_list_insert( + list, + pango_attr_strikethrough_new(strikethrough) + ); + } + g_object_get(tag, "underline-set", &set, "underline", &underline, NULL); + if(set) { + pango_attr_list_insert( + list, + pango_attr_underline_new(underline) + ); + } +} + +/* Determine the current colors used to render the text for a given stream. + * This can be set in a number of places */ +static void +style_cascade_colors(GtkTextTag *tag, GtkTextTag *glk_tag, GtkTextTag *default_tag, GdkColor **foreground, GdkColor **background) +{ + gboolean foreground_set = FALSE; + gboolean background_set = FALSE; + gint reverse_color; + + // Default color + reverse_color = GPOINTER_TO_INT( g_object_get_data(G_OBJECT(default_tag), "reverse-color") ); + g_object_get(default_tag, "foreground-set", &foreground_set, "background-set", &background_set, NULL); + if(foreground_set) + g_object_get(default_tag, "foreground-gdk", reverse_color ? background:foreground, NULL); + if(background_set) + g_object_get(default_tag, "background-gdk", reverse_color ? foreground:background, NULL); + + // Player defined color + reverse_color = GPOINTER_TO_INT( g_object_get_data(G_OBJECT(tag), "reverse-color") ); + g_object_get(tag, "foreground-set", &foreground_set, "background-set", &background_set, NULL); + if(foreground_set) + g_object_get(tag, "foreground-gdk", reverse_color ? background:foreground, NULL); + if(background_set) + g_object_get(tag, "background-gdk", reverse_color ? foreground:background, NULL); + + // GLK defined color + reverse_color = GPOINTER_TO_INT( g_object_get_data(G_OBJECT(glk_tag), "reverse-color") ); + g_object_get(glk_tag, "foreground-set", &foreground_set, "background-set", &background_set, NULL); + if(foreground_set) + g_object_get(glk_tag, "foreground-gdk", reverse_color ? background:foreground, NULL); + if(background_set) + g_object_get(glk_tag, "background-gdk", reverse_color ? foreground:background, NULL); + +} + +/* Determine the current colors used to render the text for a given stream. + * This can be set in a number of places */ +void +style_stream_colors(strid_t str, GdkColor **foreground, GdkColor **background) +{ + VALID_STREAM(str, return); + g_return_if_fail(str->window != NULL); + g_return_if_fail(str->window->type != wintype_TextBuffer || str->window->type != wintype_TextGrid); + + GtkTextBuffer *buffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW(str->window->widget) ); + GtkTextTagTable *tags = gtk_text_buffer_get_tag_table(buffer); + GtkTextTag* default_tag = gtk_text_tag_table_lookup(tags, "default"); + GtkTextTag* tag = gtk_text_tag_table_lookup(tags, str->style); + GtkTextTag* glk_tag = gtk_text_tag_table_lookup(tags, str->glk_style); + + style_cascade_colors(tag, glk_tag, default_tag, foreground, background); + + gboolean foreground_set, background_set; + + // Windows can have zcolors defined + if(str->window->zcolor) { + g_object_get(str->window->zcolor, "foreground-set", &foreground_set, "background-set", &background_set, NULL); + if(foreground_set) + g_object_get(str->window->zcolor, "foreground-gdk", foreground, NULL); + if(background_set) + g_object_get(str->window->zcolor, "background-gdk", background, NULL); + } +} + +/* Apply styles to a segment of text in a GtkTextBuffer, combining multiple + * GtkTextTags. + */ +void +style_apply(winid_t win, GtkTextIter *start, GtkTextIter *end) +{ + GtkTextBuffer *buffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW(win->widget) ); + GtkTextTagTable *tags = gtk_text_buffer_get_tag_table(buffer); + + GtkTextTag *default_tag = gtk_text_tag_table_lookup(tags, "default"); + GtkTextTag *style_tag = gtk_text_tag_table_lookup(tags, win->window_stream->style); + GtkTextTag *glk_style_tag = gtk_text_tag_table_lookup(tags, win->window_stream->glk_style); + + // Player's style overrides + gtk_text_buffer_apply_tag(buffer, style_tag, start, end); + + // GLK Program's style overrides + gtk_text_buffer_apply_tag(buffer, glk_style_tag, start, end); + + // Default style + gtk_text_buffer_apply_tag(buffer, default_tag, start, end); + + // Link style overrides + if(win->window_stream->hyperlink_mode) { + GtkTextTag *link_style_tag = gtk_text_tag_table_lookup(tags, "hyperlink"); + GtkTextTag *link_tag = win->current_hyperlink->tag; + gtk_text_buffer_apply_tag(buffer, link_style_tag, start, end); + gtk_text_buffer_apply_tag(buffer, link_tag, start, end); + } + + // GLK Program's style overrides using garglk_set_zcolors() + if(win->zcolor != NULL) { + gtk_text_buffer_apply_tag(buffer, win->zcolor, start, end); + } + + // GLK Program's style overrides using garglk_set_reversevideo() + if(win->zcolor_reversed != NULL) { + gtk_text_buffer_apply_tag(buffer, win->zcolor_reversed, start, end); + } +} +