Fixed freeing data at stop & start. Previously the root window was set to NULL when...
[rodin/chimara.git] / libchimara / style.c
index f6093d9a0884c6d3dc5ca8134aaf4326a82506fa..af371d1a52fbd0b1ebb5526507328751c336e829 100644 (file)
@@ -1,16 +1,21 @@
-#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;
-static gboolean chimara_style_initialized = FALSE;
 
 static gboolean style_accept(GScanner *scanner, GTokenType token);
 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);
+GtkTextTag* gtk_text_tag_copy(GtkTextTag *tag);
 
 /**
  * glk_set_style:
@@ -33,6 +38,20 @@ glk_set_style(glui32 styl)
        glk_set_style_stream(glk_data->current_stream, styl);
 }
 
+static const gchar* TAG_NAMES[] = {
+       "normal",
+       "emphasized",
+       "preformatted",
+       "header",
+       "subheader",
+       "alert",
+       "note",
+       "block-quote",
+       "input",
+       "user1",
+       "user2"
+};
+
 /* Internal function: mapping from style enum to tag name */
 static gchar*
 get_tag_name(glui32 style)
@@ -54,6 +73,10 @@ get_tag_name(glui32 style)
  */
 void
 glk_set_style_stream(strid_t str, glui32 styl) {
+       if(str->window == NULL)
+               return;
+
+       flush_window_buffer(str->window);
        str->style = get_tag_name(styl);
 }
 
@@ -63,11 +86,12 @@ style_init_textbuffer(GtkTextBuffer *buffer)
 {
        g_return_if_fail(buffer != NULL);
 
-       if( G_UNLIKELY(!chimara_style_initialized) ) {
+       ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
+       if( G_UNLIKELY(!glk_data->style_initialized) ) {
                style_init();
        }
 
-       ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
+       /* 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));
 }
 
@@ -76,12 +100,13 @@ void
 style_init_textgrid(GtkTextBuffer *buffer)
 {
        g_return_if_fail(buffer != NULL);
-
-       if( G_UNLIKELY(!chimara_style_initialized) ) {
+       
+       ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
+       if( G_UNLIKELY(!glk_data->style_initialized) ) {
                style_init();
        }
 
-       ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
+       /* 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));
 }
 
@@ -104,7 +129,7 @@ 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;
@@ -138,35 +163,30 @@ gtk_text_tag_copy(GtkTextTag *tag)
                _COPY_FLAG (language_set);
        #undef _COPY_FLAG
 
+       /* 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 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);
+       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 = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ#";
-       scanner->config->cset_identifier_nth = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_0123456789";
-       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);
@@ -177,11 +197,11 @@ 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");
@@ -193,22 +213,85 @@ 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);
+
        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);
+
+       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 */
        g_hash_table_foreach(default_text_grid_styles, style_table_copy, current_text_grid_styles);
@@ -216,9 +299,7 @@ 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);
-
-       chimara_style_initialized = TRUE;
+       glk_data->style_initialized = TRUE;
 }
 
 /* Internal function: parses a token */
@@ -459,11 +540,8 @@ apply_stylehint_to_tag(GtkTextTag *tag, glui32 hint, glsi32 val)
 
        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];
@@ -554,6 +632,8 @@ apply_stylehint_to_tag(GtkTextTag *tag, glui32 hint, glsi32 val)
                                g_object_set(tag_object, "background-gdk", foreground_color, NULL);
                        else
                                g_object_set(tag_object, "background", "#000000", NULL);
+
+                       g_object_set_data( tag_object, "reverse-color", GINT_TO_POINTER(val != 0) );
                }
                break;
 
@@ -633,8 +713,7 @@ query_tag(GtkTextTag *tag, glui32 hint)
                break;
 
        case stylehint_ReverseColor:
-               /* FIXME: implement this */
-               return 0;
+               return GPOINTER_TO_INT( g_object_get_data(G_OBJECT(tag), "reverse_color") );
                break;
 
        default:
@@ -664,7 +743,7 @@ glk_stylehint_set(glui32 wintype, glui32 styl, glui32 hint, glsi32 val)
 {
        ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
 
-       if( G_UNLIKELY(!chimara_style_initialized) ) {
+       if( G_UNLIKELY(!glk_data->style_initialized) ) {
                style_init();
        }
 
@@ -680,6 +759,20 @@ glk_stylehint_set(glui32 wintype, glui32 styl, glui32 hint, glsi32 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 <code>stylehint_</code> constants.
+ *
+ * Resets a hint about the appearance of one style for a particular type of 
+ * window to it's default value. You can also set wintype to %wintype_AllTypes, which resets a hint for 
+ * all types of window.
+ * <note><para>
+ *  There is no equivalent constant to reset a hint for all styles of a single 
+ *  window type.
+ * </para></note>
+ */
 void
 glk_stylehint_clear(glui32 wintype, glui32 styl, glui32 hint)
 {
@@ -699,12 +792,31 @@ glk_stylehint_clear(glui32 wintype, glui32 styl, glui32 hint)
        }
 }
 
+/**
+ * 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 styel to be distinguished from the first style.
+ * 
+ * Returns: TRUE if the two styles are visually distinguishable in the given window.
+ * If they are not, it returns FALSE.
+ */
 glui32
 glk_style_distinguish(winid_t win, glui32 styl1, glui32 styl2)
 {
        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.
+ * 
+ * This function can be used to query the current value of a particular style hint.
+ * Returns: TRUE upon successul retrievel, otherwise FALSE.
+ */
 glui32
 glk_style_measure(winid_t win, glui32 styl, glui32 hint, glui32 *result)
 {
@@ -725,3 +837,33 @@ 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;
+}