+++ /dev/null
-/* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
-
- font.c for the Openbox window manager
- Copyright (c) 2006 Mikael Magnusson
- Copyright (c) 2003-2007 Dana Jansens
- Copyright (c) 2003 Derek Foreman
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- See the COPYING file for a copy of the GNU General Public License.
-*/
-
-#include "font.h"
-#include "color.h"
-#include "mask.h"
-#include "theme.h"
-#include "geom.h"
-#include "instance.h"
-#include "gettext.h"
-
-#include <glib.h>
-#include <string.h>
-#include <stdlib.h>
-#include <locale.h>
-
-static void measure_font(const RrInstance *inst, RrFont *f)
-{
- PangoFontMetrics *metrics;
- static PangoLanguage *lang = NULL;
-
- if (lang == NULL) {
-#if PANGO_VERSION_MAJOR > 1 || \
- (PANGO_VERSION_MAJOR == 1 && PANGO_VERSION_MINOR >= 16)
- lang = pango_language_get_default();
-#else
- gchar *locale, *p;
- /* get the default language from the locale
- (based on gtk_get_default_language in gtkmain.c) */
- locale = g_strdup(setlocale(LC_CTYPE, NULL));
- if ((p = strchr(locale, '.'))) *p = '\0'; /* strip off the . */
- if ((p = strchr(locale, '@'))) *p = '\0'; /* strip off the @ */
- lang = pango_language_from_string(locale);
- g_free(locale);
-#endif
- }
-
- /* measure the ascent and descent */
- metrics = pango_context_get_metrics(inst->pango, f->font_desc, lang);
- f->ascent = pango_font_metrics_get_ascent(metrics);
- f->descent = pango_font_metrics_get_descent(metrics);
- pango_font_metrics_unref(metrics);
-
-}
-
-RrFont *RrFontOpen(const RrInstance *inst, const gchar *name, gint size,
- RrFontWeight weight, RrFontSlant slant)
-{
- RrFont *out;
- PangoWeight pweight;
- PangoStyle pstyle;
- PangoAttrList *attrlist;
-
- out = g_new(RrFont, 1);
- out->inst = inst;
- out->ref = 1;
- out->font_desc = pango_font_description_new();
- out->layout = pango_layout_new(inst->pango);
- out->shortcut_underline = pango_attr_underline_new(PANGO_UNDERLINE_LOW);
- out->shortcut_underline->start_index = 0;
- out->shortcut_underline->end_index = 0;
-
- attrlist = pango_attr_list_new();
- /* shortcut_underline is owned by the attrlist */
- pango_attr_list_insert(attrlist, out->shortcut_underline);
- /* the attributes are owned by the layout */
- pango_layout_set_attributes(out->layout, attrlist);
- pango_attr_list_unref(attrlist);
-
- switch (weight) {
- case RR_FONTWEIGHT_LIGHT: pweight = PANGO_WEIGHT_LIGHT; break;
- case RR_FONTWEIGHT_NORMAL: pweight = PANGO_WEIGHT_NORMAL; break;
- case RR_FONTWEIGHT_SEMIBOLD: pweight = PANGO_WEIGHT_SEMIBOLD; break;
- case RR_FONTWEIGHT_BOLD: pweight = PANGO_WEIGHT_BOLD; break;
- case RR_FONTWEIGHT_ULTRABOLD: pweight = PANGO_WEIGHT_ULTRABOLD; break;
- default: g_assert_not_reached();
- }
-
- switch (slant) {
- case RR_FONTSLANT_NORMAL: pstyle = PANGO_STYLE_NORMAL; break;
- case RR_FONTSLANT_ITALIC: pstyle = PANGO_STYLE_ITALIC; break;
- case RR_FONTSLANT_OBLIQUE: pstyle = PANGO_STYLE_OBLIQUE; break;
- default: g_assert_not_reached();
- }
-
- /* setup the font */
- pango_font_description_set_family(out->font_desc, name);
- pango_font_description_set_weight(out->font_desc, pweight);
- pango_font_description_set_style(out->font_desc, pstyle);
- pango_font_description_set_size(out->font_desc, size * PANGO_SCALE);
-
- /* setup the layout */
- pango_layout_set_font_description(out->layout, out->font_desc);
- pango_layout_set_wrap(out->layout, PANGO_WRAP_WORD_CHAR);
-
- /* get the ascent and descent */
- measure_font(inst, out);
-
- return out;
-}
-
-RrFont *RrFontOpenDefault(const RrInstance *inst)
-{
- return RrFontOpen(inst, RrDefaultFontFamily, RrDefaultFontSize,
- RrDefaultFontWeight, RrDefaultFontSlant);
-}
-
-void RrFontRef(RrFont *f)
-{
- ++f->ref;
-}
-
-void RrFontClose(RrFont *f)
-{
- if (f) {
- if (--f->ref < 1) {
- g_object_unref(f->layout);
- pango_font_description_free(f->font_desc);
- g_free(f);
- }
- }
-}
-
-static void font_measure_full(const RrFont *f, const gchar *str,
- gint *x, gint *y, gint shadow_x, gint shadow_y,
- gboolean flow, gint maxwidth)
-{
- PangoRectangle rect;
-
- pango_layout_set_text(f->layout, str, -1);
- if (flow) {
- pango_layout_set_single_paragraph_mode(f->layout, FALSE);
- pango_layout_set_width(f->layout, maxwidth * PANGO_SCALE);
- pango_layout_set_ellipsize(f->layout, PANGO_ELLIPSIZE_NONE);
- }
- else {
- /* single line mode */
- pango_layout_set_single_paragraph_mode(f->layout, TRUE);
- pango_layout_set_width(f->layout, -1);
- pango_layout_set_ellipsize(f->layout, PANGO_ELLIPSIZE_MIDDLE);
- }
-
- /* pango_layout_get_pixel_extents lies! this is the right way to get the
- size of the text's area */
- pango_layout_get_extents(f->layout, NULL, &rect);
-#if PANGO_VERSION_MAJOR > 1 || \
- (PANGO_VERSION_MAJOR == 1 && PANGO_VERSION_MINOR >= 16)
- /* pass the logical rect as the ink rect, this is on purpose so we get the
- full area for the text */
- pango_extents_to_pixels(&rect, NULL);
-#else
- rect.width = (rect.width + PANGO_SCALE - 1) / PANGO_SCALE;
- rect.height = (rect.height + PANGO_SCALE - 1) / PANGO_SCALE;
-#endif
- *x = rect.width + ABS(shadow_x) + 4 /* we put a 2 px edge on each side */;
- *y = rect.height + ABS(shadow_y);
-}
-
-RrSize *RrFontMeasureString(const RrFont *f, const gchar *str,
- gint shadow_x, gint shadow_y,
- gboolean flow, gint maxwidth)
-{
- RrSize *size;
-
- g_assert(!flow || maxwidth > 0);
-
- size = g_new(RrSize, 1);
- font_measure_full(f, str, &size->width, &size->height, shadow_x, shadow_y,
- flow, maxwidth);
- return size;
-}
-
-gint RrFontHeight(const RrFont *f, gint shadow_y)
-{
- return (f->ascent + f->descent) / PANGO_SCALE + ABS(shadow_y);
-}
-
-static inline int font_calculate_baseline(RrFont *f, gint height)
-{
-/* For my own reference:
- * _________
- * ^space/2 ^height ^baseline
- * v_________|_ |
- * | ^ascent | _ _
- * | | | | |_ _____ _| |_ _ _
- * | | | | _/ -_) \ / _| || |
- * | v_________v \__\___/_\_\\__|\_, |
- * | ^descent |__/
- * __________|_v
- * ^space/2 |
- * V_________v
- */
- return (((height * PANGO_SCALE) /* height of the space in pango units */
- - (f->ascent + f->descent)) /* minus space taken up by text */
- / 2 /* divided by two -> half of the empty space (this is the top
- of the text) */
- + f->ascent) /* now move down to the baseline */
- / PANGO_SCALE; /* back to pixels */
-}
-
-void RrFontDraw(XftDraw *d, RrTextureText *t, RrRect *area)
-{
- gint x,y,w;
- XftColor c;
- gint mw;
- PangoRectangle rect;
- PangoAttrList *attrlist;
- PangoEllipsizeMode ell;
-
- g_assert(!t->flow || t->maxwidth > 0);
-
- y = area->y;
- if (!t->flow)
- /* center the text vertically
- We do this centering based on the 'baseline' since different fonts
- have different top edges. It looks bad when the whole string is
- moved when 1 character from a non-default language is included in
- the string */
- y += font_calculate_baseline(t->font, area->height);
-
- /* the +2 and -4 leave a small blank edge on the sides */
- x = area->x + 2;
- w = area->width;
- if (t->flow) w = MAX(w, t->maxwidth);
- w -= 4;
- /* h = area->height; */
-
- if (t->flow)
- ell = PANGO_ELLIPSIZE_NONE;
- else {
- switch (t->ellipsize) {
- case RR_ELLIPSIZE_NONE:
- ell = PANGO_ELLIPSIZE_NONE;
- break;
- case RR_ELLIPSIZE_START:
- ell = PANGO_ELLIPSIZE_START;
- break;
- case RR_ELLIPSIZE_MIDDLE:
- ell = PANGO_ELLIPSIZE_MIDDLE;
- break;
- case RR_ELLIPSIZE_END:
- ell = PANGO_ELLIPSIZE_END;
- break;
- default:
- g_assert_not_reached();
- }
- }
-
- pango_layout_set_text(t->font->layout, t->string, -1);
- pango_layout_set_width(t->font->layout, w * PANGO_SCALE);
- pango_layout_set_ellipsize(t->font->layout, ell);
- pango_layout_set_single_paragraph_mode(t->font->layout, !t->flow);
-
- /* * * end of setting up the layout * * */
-
- pango_layout_get_pixel_extents(t->font->layout, NULL, &rect);
- mw = rect.width;
-
- /* pango_layout_set_alignment doesn't work with
- pango_xft_render_layout_line */
- switch (t->justify) {
- case RR_JUSTIFY_LEFT:
- break;
- case RR_JUSTIFY_RIGHT:
- x += (w - mw);
- break;
- case RR_JUSTIFY_CENTER:
- x += (w - mw) / 2;
- break;
- }
-
- if (t->shadow_offset_x || t->shadow_offset_y) {
- /* From nvidia's readme (chapter 23):
-
- When rendering to a 32-bit window, keep in mind that the X RENDER
- extension, used by most composite managers, expects "premultiplied
- alpha" colors. This means that if your color has components (r,g,b)
- and alpha value a, then you must render (a*r, a*g, a*b, a) into the
- target window.
- */
- c.color.red = (t->shadow_color->r | t->shadow_color->r << 8) *
- t->shadow_alpha / 255;
- c.color.green = (t->shadow_color->g | t->shadow_color->g << 8) *
- t->shadow_alpha / 255;
- c.color.blue = (t->shadow_color->b | t->shadow_color->b << 8) *
- t->shadow_alpha / 255;
- c.color.alpha = 0xffff * t->shadow_alpha / 255;
- c.pixel = t->shadow_color->pixel;
-
- /* see below... */
- if (!t->flow) {
- pango_xft_render_layout_line
- (d, &c,
-#if PANGO_VERSION_MAJOR > 1 || \
- (PANGO_VERSION_MAJOR == 1 && PANGO_VERSION_MINOR >= 16)
- pango_layout_get_line_readonly(t->font->layout, 0),
-#else
- pango_layout_get_line(t->font->layout, 0),
-#endif
- (x + t->shadow_offset_x) * PANGO_SCALE,
- (y + t->shadow_offset_y) * PANGO_SCALE);
- }
- else {
- pango_xft_render_layout(d, &c, t->font->layout,
- (x + t->shadow_offset_x) * PANGO_SCALE,
- (y + t->shadow_offset_y) * PANGO_SCALE);
- }
- }
-
- c.color.red = t->color->r | t->color->r << 8;
- c.color.green = t->color->g | t->color->g << 8;
- c.color.blue = t->color->b | t->color->b << 8;
- c.color.alpha = 0xff | 0xff << 8; /* fully opaque text */
- c.pixel = t->color->pixel;
-
- if (t->shortcut) {
- const gchar *s = t->string + t->shortcut_pos;
-
- t->font->shortcut_underline->start_index = t->shortcut_pos;
- t->font->shortcut_underline->end_index = t->shortcut_pos +
- (g_utf8_next_char(s) - s);
-
- /* the attributes are owned by the layout.
- re-add the attributes to the layout after changing the
- start and end index */
- attrlist = pango_layout_get_attributes(t->font->layout);
- pango_attr_list_ref(attrlist);
- pango_layout_set_attributes(t->font->layout, attrlist);
- pango_attr_list_unref(attrlist);
- }
-
- /* layout_line() uses y to specify the baseline
- The line doesn't need to be freed, it's a part of the layout */
- if (!t->flow) {
- pango_xft_render_layout_line
- (d, &c,
-#if PANGO_VERSION_MAJOR > 1 || \
- (PANGO_VERSION_MAJOR == 1 && PANGO_VERSION_MINOR >= 16)
- pango_layout_get_line_readonly(t->font->layout, 0),
-#else
- pango_layout_get_line(t->font->layout, 0),
-#endif
- x * PANGO_SCALE,
- y * PANGO_SCALE);
- }
- else {
- pango_xft_render_layout(d, &c, t->font->layout,
- x * PANGO_SCALE,
- y * PANGO_SCALE);
- }
-
- if (t->shortcut) {
- t->font->shortcut_underline->start_index = 0;
- t->font->shortcut_underline->end_index = 0;
- /* the attributes are owned by the layout.
- re-add the attributes to the layout after changing the
- start and end index */
- attrlist = pango_layout_get_attributes(t->font->layout);
- pango_attr_list_ref(attrlist);
- pango_layout_set_attributes(t->font->layout, attrlist);
- pango_attr_list_unref(attrlist);
- }
-}
projects / mikachu / openbox.git / blobdiff