Default CSS file NULL
[rodin/chimara.git] / libchimara / style.c
index 5b388f1032e78fb66796627e9b780f502966696b..96750ad05afc0c6d907bbe42f824946785d2f52b 100644 (file)
@@ -1,6 +1,12 @@
-#include "style.h"
 #include <stdio.h>
 #include <fcntl.h>
+#include <string.h>
+#include "chimara-glk-private.h"
+#include "glk.h"
+#include "style.h"
+#include "magic.h"
+#include "stream.h"
+#include "strio.h"
 
 extern GPrivate *glk_data_key;
 
@@ -9,7 +15,8 @@ static gboolean style_accept_style_selector(GScanner *scanner);
 static gboolean style_accept_style_hint(GScanner *scanner, GtkTextTag *current_tag);
 static void style_add_tag_to_textbuffer(gpointer key, gpointer tag, gpointer tag_table);
 static void style_table_copy(gpointer key, gpointer tag, gpointer target_table);
-static GtkTextTag* gtk_text_tag_copy(GtkTextTag *tag);
+static void text_tag_to_attr_list(GtkTextTag *tag, PangoAttrList *list);
+GtkTextTag* gtk_text_tag_copy(GtkTextTag *tag);
 
 /**
  * glk_set_style:
@@ -74,6 +81,16 @@ glk_set_style_stream(strid_t str, glui32 styl) {
        str->style = get_tag_name(styl);
 }
 
+/* Internal function: call this to initialize the layout of the 'more' prompt. */
+void
+style_init_more_prompt(winid_t win)
+{
+       ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
+
+       win->pager_layout = gtk_widget_create_pango_layout(win->widget, "More");
+       pango_layout_set_attributes(win->pager_layout, glk_data->pager_attr_list);
+}
+
 /* Internal function: call this to initialize the default styles to a textbuffer. */
 void
 style_init_textbuffer(GtkTextBuffer *buffer)
@@ -84,9 +101,12 @@ style_init_textbuffer(GtkTextBuffer *buffer)
        if( G_UNLIKELY(!glk_data->style_initialized) ) {
                style_init();
        }
+
+       /* Copy the current text tags to the textbuffer's tag table */
        g_hash_table_foreach(glk_data->current_styles->text_buffer, style_add_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
 }
 
+
 /* Internal function: call this to initialize the default styles to a textgrid. */
 void
 style_init_textgrid(GtkTextBuffer *buffer)
@@ -97,6 +117,8 @@ style_init_textgrid(GtkTextBuffer *buffer)
        if( G_UNLIKELY(!glk_data->style_initialized) ) {
                style_init();
        }
+
+       /* Copy the current text tags to the textgrid's tag table */
        g_hash_table_foreach(glk_data->current_styles->text_grid, style_add_tag_to_textbuffer, gtk_text_buffer_get_tag_table(buffer));
 }
 
@@ -119,7 +141,7 @@ style_table_copy(gpointer key, gpointer tag, gpointer target_table)
 }
 
 /* Internal function that copies a text tag */
-static GtkTextTag*
+GtkTextTag*
 gtk_text_tag_copy(GtkTextTag *tag)
 {
        GtkTextTag *copy;
@@ -153,8 +175,11 @@ gtk_text_tag_copy(GtkTextTag *tag)
                _COPY_FLAG (language_set);
        #undef _COPY_FLAG
 
-       /* Copy the reverse_color attribute, that was added manually */
-       g_object_set_data( G_OBJECT(copy), "reverse_color", g_object_get_data(G_OBJECT(tag), "reverse_color") );
+       /* 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;
 }
@@ -164,27 +189,16 @@ 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);
+       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);
+       GHashTable *current_text_grid_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_object_unref);
+       GHashTable *current_text_buffer_styles = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, 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"));
+       /* Initialise the default styles for a text grid */
+       tag = gtk_text_tag_new("normal");
+       g_object_set(tag, "font-desc", glk_data->monospace_font_desc, NULL);
+       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);
@@ -195,11 +209,11 @@ style_init()
        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_object_set(tag, "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_object_set(tag, "weight", PANGO_WEIGHT_BOLD, NULL);
        g_hash_table_insert(default_text_grid_styles, "subheader", tag);
 
        tag = gtk_text_tag_new("alert");
@@ -211,21 +225,90 @@ style_init()
        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_object_set(tag, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, 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);
+       tag = gtk_text_tag_new("hyperlink");
+       g_object_set(tag, "foreground", "#0000ff", "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
+       g_hash_table_insert(default_text_grid_styles, "hyperlink", tag);
+
+       /* Tags for the textbuffer */
+       tag = gtk_text_tag_new("normal");
+       g_object_set(tag, "font-desc", glk_data->default_font_desc, NULL);
+       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, "font-desc", glk_data->monospace_font_desc, NULL);
+       g_hash_table_insert(default_text_buffer_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_buffer_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_buffer_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_buffer_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_buffer_styles, "note", tag);
+
+       tag = gtk_text_tag_new("block-quote");
+       g_object_set(tag, "justification", GTK_JUSTIFY_CENTER, "style", PANGO_STYLE_ITALIC, "style-set", TRUE, NULL);
+       g_hash_table_insert(default_text_buffer_styles, "block-quote", tag);
+
+       g_hash_table_insert(default_text_buffer_styles, "input", gtk_text_tag_new("input"));
+       g_hash_table_insert(default_text_buffer_styles, "user1", gtk_text_tag_new("user1"));
+       g_hash_table_insert(default_text_buffer_styles, "user2", gtk_text_tag_new("user2"));
+
+       tag = gtk_text_tag_new("hyperlink");
+       g_object_set(tag, "foreground", "#0000ff", "underline", PANGO_UNDERLINE_SINGLE, "underline-set", TRUE, NULL);
+       g_hash_table_insert(default_text_buffer_styles, "hyperlink", tag);
+
+       GtkTextTag *pager_tag = gtk_text_tag_new("pager");
+       g_object_set(pager_tag, "foreground", "#ffffff", "background", "#000000", NULL);
+       g_hash_table_insert(default_text_buffer_styles, "pager", pager_tag);
+
        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;
+       /* Create the CSS file scanner */
+       GScanner *scanner = g_scanner_new(NULL);
+
+       if(glk_data->css_file != NULL) {
+               int f = open(glk_data->css_file, O_RDONLY);
+               if(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;
+
+                       /* 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;
+                       }
+
+                       g_scanner_destroy(scanner);
+               }
+               else
+                       g_warning("Could not find CSS file");
        }
 
        /* Set the current style to a copy of the default style */
@@ -234,7 +317,7 @@ style_init()
        glk_data->current_styles->text_grid = current_text_grid_styles;
        glk_data->current_styles->text_buffer = current_text_buffer_styles;
 
-       g_scanner_destroy(scanner);
+       text_tag_to_attr_list(pager_tag, glk_data->pager_attr_list);
 
        glk_data->style_initialized = TRUE;
 }
@@ -450,7 +533,7 @@ style_accept_style_hint(GScanner *scanner, GtkTextTag *current_tag)
 
 /* Internal function: parses a glk color to a #hex-value */
 static void
-color_format(glui32 val, gchar *buffer)
+glkcolor_to_hex(glui32 val, gchar *buffer)
 {
        g_return_if_fail(buffer != NULL);
 
@@ -461,9 +544,18 @@ color_format(glui32 val, gchar *buffer)
        );
 }
 
+/* Internal function: parses a glk color to a GdkColor */
+void
+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 GdkColor to a glk color */
 static glui32
-color_parse_gdk(GdkColor *color)
+gdkcolor_to_glkcolor(GdkColor *color)
 {
        g_return_val_if_fail(color != NULL, 0);
        return (glui32) color->pixel;
@@ -528,7 +620,7 @@ apply_stylehint_to_tag(GtkTextTag *tag, glui32 hint, glsi32 val)
                break;
 
        case stylehint_TextColor:
-               color_format(val, color);
+               glkcolor_to_hex(val, color);
 
                if(!reverse_color)
                        g_object_set(tag_object, "foreground", color, "foreground-set", TRUE, NULL);
@@ -538,7 +630,7 @@ apply_stylehint_to_tag(GtkTextTag *tag, glui32 hint, glsi32 val)
                break;
 
        case stylehint_BackColor:
-               color_format(val, color);
+               glkcolor_to_hex(val, color);
 
                if(!reverse_color)
                        g_object_set(tag_object, "background", color, "background-set", TRUE, NULL);
@@ -641,12 +733,12 @@ query_tag(GtkTextTag *tag, glui32 hint)
 
        case stylehint_TextColor:
                g_object_get(tag, "foreground-gdk", &colval, NULL);
-               return color_parse_gdk(colval);
+               return gdkcolor_to_glkcolor(colval);
                break;
 
        case stylehint_BackColor:
                g_object_get(tag, "background-gdk", &colval, NULL);
-               return color_parse_gdk(colval);
+               return gdkcolor_to_glkcolor(colval);
                break;
 
        case stylehint_ReverseColor:
@@ -774,3 +866,91 @@ glk_style_measure(winid_t win, glui32 styl, glui32 hint, glui32 *result)
 
        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);
+       GtkTextTag *normal;
+
+       if( G_UNLIKELY(!glk_data->style_initialized) ) {
+               style_init();
+       }
+
+       switch(wintype) {
+       case wintype_TextGrid:
+               normal = g_hash_table_lookup(glk_data->current_styles->text_grid, "normal");
+               break;
+       case wintype_TextBuffer:
+               normal = g_hash_table_lookup(glk_data->current_styles->text_buffer, "normal");
+               break;
+       default:
+               return NULL;
+       }
+
+       PangoFontDescription *font;
+       g_object_get( G_OBJECT(normal), "font-desc", &font, NULL );
+
+       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
+        */
+       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)
+               );
+       }
+}