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Improve font size computation.

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This commit is contained in:
Daiki Ueno
2011-03-10 17:16:31 +09:00
parent f60e1d763e
commit c44ebecfb2
1 changed files with 60 additions and 33 deletions
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93
eek/eek-renderer.c
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@ -53,6 +53,7 @@ struct _EekRendererPrivate
gdouble allocation_height;
gdouble scale;
PangoFontDescription *ascii_font;
PangoFontDescription *font;
GHashTable *outline_surface_cache;
GHashTable *active_outline_surface_cache;
@ -65,14 +66,13 @@ struct _EekRendererPrivate
static const EekColor DEFAULT_FOREGROUND_COLOR = {0.3, 0.3, 0.3, 1.0};
static const EekColor DEFAULT_BACKGROUND_COLOR = {1.0, 1.0, 1.0, 1.0};
struct {
struct _TextProperty {
gint category;
gboolean ascii;
gdouble scale;
} symbol_category_scale_factors[EEK_SYMBOL_CATEGORY_LAST] = {
{ EEK_SYMBOL_CATEGORY_LETTER, 1.0 },
{ EEK_SYMBOL_CATEGORY_FUNCTION, 0.5 },
{ EEK_SYMBOL_CATEGORY_KEYNAME, 0.5 }
gboolean ellipses;
};
typedef struct _TextProperty TextProperty;
/* eek-keyboard-drawing.c */
extern void _eek_rounded_polygon (cairo_t *cr,
@ -342,7 +342,7 @@ render_key_outline (EekRenderer *renderer,
struct _CalculateFontSizeCallbackData {
gdouble size;
gdouble em_size;
gboolean ascii;
EekRenderer *renderer;
const PangoFontDescription *base_font;
};
@ -358,16 +358,21 @@ calculate_font_size_key_callback (EekElement *element, gpointer user_data)
PangoRectangle extents = { 0, };
PangoLayout *layout;
gdouble size;
EekSymbol *symbol;
EekBounds bounds;
const gchar *label = NULL;
symbol = eek_key_get_symbol (EEK_KEY(element));
if (symbol &&
eek_symbol_get_category (symbol) == EEK_SYMBOL_CATEGORY_LETTER)
label = eek_symbol_get_label (symbol);
if (!label)
if (data->ascii)
label = "M";
else {
EekSymbol *symbol;
symbol = eek_key_get_symbol (EEK_KEY(element));
if (symbol &&
eek_symbol_get_category (symbol) == EEK_SYMBOL_CATEGORY_LETTER)
label = eek_symbol_get_label (symbol);
if (!label)
label = "M";
}
font = pango_font_description_copy (data->base_font);
@ -390,12 +395,8 @@ calculate_font_size_key_callback (EekElement *element, gpointer user_data)
sy = bounds.height * PANGO_SCALE / extents.height;
size *= MIN(sx, sy);
if (size >= pango_font_description_get_size (data->base_font)) {
if (size < data->size)
data->size = size;
if (size < data->em_size)
data->em_size = size;
}
if (size < data->size)
data->size = size;
}
static void
@ -407,19 +408,21 @@ calculate_font_size_section_callback (EekElement *element, gpointer user_data)
}
static gdouble
calculate_font_size (EekRenderer *renderer, const PangoFontDescription *base_font)
calculate_font_size (EekRenderer *renderer,
const PangoFontDescription *base_font,
gboolean ascii)
{
EekRendererPrivate *priv = EEK_RENDERER_GET_PRIVATE(renderer);
CalculateFontSizeCallbackData data;
data.size = G_MAXDOUBLE;
data.em_size = G_MAXDOUBLE;
data.ascii = ascii;
data.renderer = renderer;
data.base_font = base_font;
eek_container_foreach_child (EEK_CONTAINER(priv->keyboard),
calculate_font_size_section_callback,
&data);
return data.size > 0 ? data.size : data.em_size;
return data.size;
}
static void
@ -538,6 +541,23 @@ eek_renderer_apply_transformation_for_key (EekRenderer *self,
}
}
static const TextProperty *
get_text_property_for_category (EekSymbolCategory category)
{
static const TextProperty props[EEK_SYMBOL_CATEGORY_LAST] = {
{ EEK_SYMBOL_CATEGORY_LETTER, FALSE, 1.0, FALSE },
{ EEK_SYMBOL_CATEGORY_FUNCTION, TRUE, 0.5, FALSE },
{ EEK_SYMBOL_CATEGORY_KEYNAME, TRUE, 0.5, TRUE }
};
gint i;
for (i = 0; i < G_N_ELEMENTS(props); i++)
if (props[i].category == category)
return &props[i];
g_return_val_if_reached (NULL);
}
static void
eek_renderer_real_render_key_label (EekRenderer *self,
PangoLayout *layout,
@ -548,9 +568,9 @@ eek_renderer_real_render_key_label (EekRenderer *self,
EekSymbolCategory category;
const gchar *label;
EekBounds bounds;
const TextProperty *prop;
PangoFontDescription *font;
gdouble size, scale;
gint i;
symbol = eek_key_get_symbol_with_fallback (key, 0, 0);
if (!symbol)
@ -562,7 +582,7 @@ eek_renderer_real_render_key_label (EekRenderer *self,
if (!priv->font) {
const PangoFontDescription *base_font;
gdouble size;
gdouble ascii_size, size;
EekThemeNode *theme_node;
theme_node = g_object_get_data (G_OBJECT(key), "theme-node");
@ -570,7 +590,11 @@ eek_renderer_real_render_key_label (EekRenderer *self,
base_font = eek_theme_node_get_font (theme_node);
else
base_font = pango_context_get_font_description (priv->pcontext);
size = calculate_font_size (self, base_font);
ascii_size = calculate_font_size (self, base_font, TRUE);
priv->ascii_font = pango_font_description_copy (base_font);
pango_font_description_set_size (priv->ascii_font, ascii_size);
size = calculate_font_size (self, base_font, FALSE);
priv->font = pango_font_description_copy (base_font);
pango_font_description_set_size (priv->font, size);
}
@ -579,21 +603,23 @@ eek_renderer_real_render_key_label (EekRenderer *self,
scale = MIN((bounds.width - priv->border_width) / bounds.width,
(bounds.height - priv->border_width) / bounds.height);
font = pango_font_description_copy (priv->font);
size = pango_font_description_get_size (font);
category = eek_symbol_get_category (symbol);
for (i = 0; i < G_N_ELEMENTS(symbol_category_scale_factors); i++)
if (symbol_category_scale_factors[i].category == category) {
size *= symbol_category_scale_factors[i].scale;
break;
}
pango_font_description_set_size (font, size * priv->scale * scale);
prop = get_text_property_for_category (category);
font = pango_font_description_copy (prop->ascii ?
priv->ascii_font :
priv->font);
pango_font_description_set_size (font,
pango_font_description_get_size (font) *
prop->scale * priv->scale * scale);
pango_layout_set_font_description (layout, font);
pango_font_description_free (font);
pango_layout_set_text (layout, label, -1);
pango_layout_set_width (layout,
PANGO_SCALE * bounds.width * priv->scale * scale);
pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_END);
if (prop->ellipses)
pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_END);
}
static void
@ -719,6 +745,7 @@ eek_renderer_finalize (GObject *object)
EekRendererPrivate *priv = EEK_RENDERER_GET_PRIVATE(object);
g_hash_table_destroy (priv->outline_surface_cache);
g_hash_table_destroy (priv->active_outline_surface_cache);
pango_font_description_free (priv->ascii_font);
pango_font_description_free (priv->font);
G_OBJECT_CLASS (eek_renderer_parent_class)->finalize (object);
}