mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-11-26 00:09:41 +03:00
166 lines
3.9 KiB
C
166 lines
3.9 KiB
C
/*
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* Copyright 2009 John-Mark Bell <jmb@netsurf-browser.org>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* \file
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*
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* HTML internal font handling implementation.
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*/
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#include "utils/nsoption.h"
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#include "netsurf/plot_style.h"
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#include "css/utils.h"
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#include "html/font.h"
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/**
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* Map a generic CSS font family to a generic plot font family
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*
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* \param css Generic CSS font family
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* \return Plot font family
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*/
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static plot_font_generic_family_t
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plot_font_generic_family(enum css_font_family_e css)
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{
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plot_font_generic_family_t plot;
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switch (css) {
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case CSS_FONT_FAMILY_SERIF:
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plot = PLOT_FONT_FAMILY_SERIF;
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break;
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case CSS_FONT_FAMILY_MONOSPACE:
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plot = PLOT_FONT_FAMILY_MONOSPACE;
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break;
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case CSS_FONT_FAMILY_CURSIVE:
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plot = PLOT_FONT_FAMILY_CURSIVE;
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break;
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case CSS_FONT_FAMILY_FANTASY:
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plot = PLOT_FONT_FAMILY_FANTASY;
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break;
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case CSS_FONT_FAMILY_SANS_SERIF:
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default:
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plot = PLOT_FONT_FAMILY_SANS_SERIF;
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break;
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}
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return plot;
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}
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/**
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* Map a CSS font weight to a plot weight value
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*
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* \param css CSS font weight
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* \return Plot weight
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*/
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static int plot_font_weight(enum css_font_weight_e css)
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{
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int weight;
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switch (css) {
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case CSS_FONT_WEIGHT_100:
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weight = 100;
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break;
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case CSS_FONT_WEIGHT_200:
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weight = 200;
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break;
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case CSS_FONT_WEIGHT_300:
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weight = 300;
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break;
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case CSS_FONT_WEIGHT_400:
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case CSS_FONT_WEIGHT_NORMAL:
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default:
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weight = 400;
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break;
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case CSS_FONT_WEIGHT_500:
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weight = 500;
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break;
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case CSS_FONT_WEIGHT_600:
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weight = 600;
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break;
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case CSS_FONT_WEIGHT_700:
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case CSS_FONT_WEIGHT_BOLD:
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weight = 700;
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break;
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case CSS_FONT_WEIGHT_800:
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weight = 800;
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break;
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case CSS_FONT_WEIGHT_900:
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weight = 900;
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break;
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}
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return weight;
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}
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/**
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* Map a CSS font style and font variant to plot font flags
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*
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* \param style CSS font style
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* \param variant CSS font variant
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* \return Computed plot flags
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*/
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static plot_font_flags_t plot_font_flags(enum css_font_style_e style,
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enum css_font_variant_e variant)
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{
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plot_font_flags_t flags = FONTF_NONE;
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if (style == CSS_FONT_STYLE_ITALIC)
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flags |= FONTF_ITALIC;
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else if (style == CSS_FONT_STYLE_OBLIQUE)
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flags |= FONTF_OBLIQUE;
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if (variant == CSS_FONT_VARIANT_SMALL_CAPS)
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flags |= FONTF_SMALLCAPS;
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return flags;
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}
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/* exported function documented in html/font.h */
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void font_plot_style_from_css(
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const css_unit_ctx *unit_len_ctx,
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const css_computed_style *css,
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plot_font_style_t *fstyle)
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{
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lwc_string **families;
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css_fixed length = 0;
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css_unit unit = CSS_UNIT_PX;
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css_color col;
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fstyle->family = plot_font_generic_family(
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css_computed_font_family(css, &families));
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fstyle->families = families;
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css_computed_font_size(css, &length, &unit);
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fstyle->size = FIXTOINT(FMUL(css_unit_font_size_len2pt(css,
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unit_len_ctx, length, unit),
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INTTOFIX(PLOT_STYLE_SCALE)));
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/* Clamp font size to configured minimum */
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if (fstyle->size < (nsoption_int(font_min_size) * PLOT_STYLE_SCALE) / 10)
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fstyle->size = (nsoption_int(font_min_size) * PLOT_STYLE_SCALE) / 10;
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fstyle->weight = plot_font_weight(css_computed_font_weight(css));
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fstyle->flags = plot_font_flags(css_computed_font_style(css),
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css_computed_font_variant(css));
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css_computed_color(css, &col);
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fstyle->foreground = nscss_color_to_ns(col);
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fstyle->background = 0;
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}
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