+/* 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);
+ if( G_UNLIKELY(!glk_data->style_initialized) ) {
+ style_init();
+ }
+ g_hash_table_foreach(glk_data->current_styles->text_grid, style_add_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
+}
+
+/* Internal function used to iterate over the default text tag table, applying them to a textbuffer */
+static void
+style_add_tag_to_textbuffer(gpointer key, gpointer tag, gpointer tag_table)
+{
+ gtk_text_tag_table_add( tag_table, gtk_text_tag_copy(tag) );
+}
+
+/* Internal function used to iterate over a style table, copying it */
+static void
+style_table_copy(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);
+
+ g_hash_table_insert(target_table, key, gtk_text_tag_copy( GTK_TEXT_TAG(tag) ));
+}
+
+/* Internal function that copies a text tag */
+static GtkTextTag*
+gtk_text_tag_copy(GtkTextTag *tag)
+{
+ GtkTextTag *copy;
+
+ g_return_val_if_fail(tag != NULL, NULL);
+
+ copy = gtk_text_tag_new(tag->name);
+ gtk_text_attributes_copy_values(tag->values, copy->values);
+
+ #define _COPY_FLAG(flag) copy->flag = tag->flag
+ _COPY_FLAG (bg_color_set);
+ _COPY_FLAG (bg_color_set);
+ _COPY_FLAG (bg_stipple_set);
+ _COPY_FLAG (fg_color_set);
+ _COPY_FLAG (fg_stipple_set);
+ _COPY_FLAG (justification_set);
+ _COPY_FLAG (left_margin_set);
+ _COPY_FLAG (indent_set);
+ _COPY_FLAG (rise_set);
+ _COPY_FLAG (strikethrough_set);
+ _COPY_FLAG (right_margin_set);
+ _COPY_FLAG (pixels_above_lines_set);
+ _COPY_FLAG (pixels_below_lines_set);
+ _COPY_FLAG (pixels_inside_wrap_set);
+ _COPY_FLAG (tabs_set);
+ _COPY_FLAG (underline_set);
+ _COPY_FLAG (wrap_mode_set);
+ _COPY_FLAG (bg_full_height_set);
+ _COPY_FLAG (invisible_set);
+ _COPY_FLAG (editable_set);
+ _COPY_FLAG (language_set);
+ #undef _COPY_FLAG
+
+ return copy;
+}
+
+/* Internal function that reads the default styles from a CSS file */
+void
+style_init()
+{
+ ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
+ GHashTable *default_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_object_unref);
+ GHashTable *default_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_object_unref);
+ GHashTable *current_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_object_unref);
+ GHashTable *current_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_object_unref);
+ GtkTextTag *tag;
+
+ /* Create the CSS file scanner */
+ GScanner *scanner = g_scanner_new(NULL);
+
+ int f = open(glk_data->css_file, O_RDONLY);
+ g_return_if_fail(f != -1);
+ g_scanner_input_file(scanner, f);
+ scanner->input_name = glk_data->css_file;
+ 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;
+
+ /* Initialise the default styles */
+ g_hash_table_insert(default_text_grid_styles, "normal", gtk_text_tag_new("normal"));
+
+ 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_object_set(tag, "font-desc", glk_data->monospace_font_desc, NULL);
+ g_hash_table_insert(default_text_grid_styles, "preformatted", tag);
+
+ tag = gtk_text_tag_new("header");
+ g_object_set(tag, "size-points", 18.0, "weight", PANGO_WEIGHT_BOLD, NULL);
+ g_hash_table_insert(default_text_grid_styles, "header", tag);
+
+ tag = gtk_text_tag_new("subheader");
+ g_object_set(tag, "size-points", 14.0, "weight", PANGO_WEIGHT_BOLD, NULL);
+ g_hash_table_insert(default_text_grid_styles, "subheader", tag);
+
+ tag = gtk_text_tag_new("alert");
+ g_object_set(tag, "foreground", "#aa0000", "weight", PANGO_WEIGHT_BOLD, NULL);
+ g_hash_table_insert(default_text_grid_styles, "alert", tag);
+
+ tag = gtk_text_tag_new("note");
+ g_object_set(tag, "foreground", "#aaaa00", "weight", PANGO_WEIGHT_BOLD, NULL);
+ g_hash_table_insert(default_text_grid_styles, "note", tag);
+
+ tag = gtk_text_tag_new("block-quote");
+ g_object_set(tag, "justification", GTK_JUSTIFY_CENTER, "style", PANGO_STYLE_ITALIC, NULL);
+ g_hash_table_insert(default_text_grid_styles, "block-quote", tag);
+
+ g_hash_table_insert(default_text_grid_styles, "input", gtk_text_tag_new("input"));
+ g_hash_table_insert(default_text_grid_styles, "user1", gtk_text_tag_new("user1"));
+ g_hash_table_insert(default_text_grid_styles, "user2", gtk_text_tag_new("user2"));
+
+ g_hash_table_foreach(default_text_grid_styles, style_table_copy, default_text_buffer_styles);
+ glk_data->default_styles->text_grid = default_text_grid_styles;
+ glk_data->default_styles->text_buffer = default_text_buffer_styles;
+
+ /* Run the scanner over the CSS file, overriding defaults */
+ while( g_scanner_peek_next_token(scanner) != G_TOKEN_EOF) {
+ if( !style_accept_style_selector(scanner) )
+ break;
+ }
+
+ /* Set the current style to a copy of the default style */
+ g_hash_table_foreach(default_text_grid_styles, style_table_copy, current_text_grid_styles);
+ g_hash_table_foreach(default_text_buffer_styles, style_table_copy, current_text_buffer_styles);
+ glk_data->current_styles->text_grid = current_text_grid_styles;
+ glk_data->current_styles->text_buffer = current_text_buffer_styles;
+
+ g_scanner_destroy(scanner);
+
+ glk_data->style_initialized = TRUE;
+}
+
+/* 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;
+ } else {
+ return TRUE;
+ }
+}
+
+/* Internal function: parses a style selector */
+static gboolean
+style_accept_style_selector(GScanner *scanner)
+{
+ ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
+
+ 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);
+
+ 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(glk_data->default_styles->text_buffer, value.v_identifier);
+ else
+ current_tag = g_hash_table_lookup(glk_data->default_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 #hex-value */