253 lines
7.3 KiB
C++
253 lines
7.3 KiB
C++
#pragma once
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#include <X11/Xft/Xft.h>
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#include <X11/Xlib-xcb.h>
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#include <xcb/xcbext.h>
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#include <map>
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#include <string>
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#include "common.hpp"
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#include "components/logger.hpp"
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#include "components/x11/color.hpp"
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#include "components/x11/connection.hpp"
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#include "components/x11/types.hpp"
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#include "components/x11/xlib.hpp"
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#include "utils/memory.hpp"
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#include "utils/mixins.hpp"
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LEMONBUDDY_NS
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#define XFT_MAXCHARS (1 << 16)
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static array<char, XFT_MAXCHARS> xft_widths;
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static array<wchar_t, XFT_MAXCHARS> xft_chars;
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struct fonttype {
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fonttype() {}
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XftFont* xft;
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xcb_font_t ptr;
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int offset_y = 0;
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int ascent = 0;
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int descent = 0;
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int height = 0;
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int width = 0;
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uint16_t char_max = 0;
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uint16_t char_min = 0;
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vector<xcb_charinfo_t> width_lut;
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};
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struct fonttype_deleter {
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void operator()(fonttype* f) {
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if (f->xft != nullptr)
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XftFontClose(xlib::get_display(), f->xft);
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else
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xcb_close_font(xutils::get_connection(), f->ptr);
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}
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};
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using font_t = unique_ptr<fonttype, fonttype_deleter>;
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class fontmanager {
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public:
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explicit fontmanager(connection& conn, const logger& logger)
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: m_connection(conn), m_logger(logger) {
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m_display = xlib::get_display();
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m_visual = xlib::get_visual();
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m_colormap = XDefaultColormap(m_display, 0);
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}
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~fontmanager() {
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XftColorFree(m_display, m_visual, m_colormap, &m_xftcolor);
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XFreeColormap(m_display, m_colormap);
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m_fonts.clear();
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}
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void set_preferred_font(int index) { // {{{
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if (index <= 0) {
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m_fontindex = -1;
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return;
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}
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for (auto&& font : m_fonts) {
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if (font.first == index) {
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m_fontindex = index;
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break;
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}
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}
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} // }}}
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bool load(string name, int fontindex = -1, int offset_y = 0) { // {{{
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if (fontindex != -1 && m_fonts.find(fontindex) != m_fonts.end()) {
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m_logger.warn("A font with index '%i' has already been loaded, skip...", fontindex);
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return false;
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} else if (fontindex == -1) {
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fontindex = m_fonts.size();
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m_logger.trace("fontmanager: Assign font '%s' to index '%d'", name.c_str(), fontindex);
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} else {
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m_logger.trace("fontmanager: Add font '%s' to index '%i'", name, fontindex);
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}
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m_fonts.emplace(make_pair(fontindex, font_t{new fonttype(), fonttype_deleter{}}));
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m_fonts[fontindex]->offset_y = offset_y;
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m_fonts[fontindex]->ptr = 0;
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m_fonts[fontindex]->xft = nullptr;
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if (open_xcb_font(m_fonts[fontindex], name)) {
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m_logger.trace("fontmanager: Successfully loaded X font '%s'", name);
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} else if ((m_fonts[fontindex]->xft = XftFontOpenName(m_display, 0, name.c_str())) != nullptr) {
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m_fonts[fontindex]->ptr = 0;
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m_fonts[fontindex]->ascent = m_fonts[fontindex]->xft->ascent;
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m_fonts[fontindex]->descent = m_fonts[fontindex]->xft->descent;
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m_fonts[fontindex]->height = m_fonts[fontindex]->ascent + m_fonts[fontindex]->descent;
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m_logger.trace("fontmanager: Successfully loaded Freetype font '%s'", name);
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} else {
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return false;
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}
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int max_height = 0;
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for (auto& iter : m_fonts)
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if (iter.second->height > max_height)
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max_height = iter.second->height;
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for (auto& iter : m_fonts) {
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iter.second->height = max_height;
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}
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return true;
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} // }}}
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font_t& match_char(uint16_t chr) { // {{{
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static font_t notfound;
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if (!m_fonts.empty()) {
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if (m_fontindex != -1 && size_t(m_fontindex) <= m_fonts.size()) {
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auto iter = m_fonts.find(m_fontindex);
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if (iter != m_fonts.end() && has_glyph(iter->second, chr))
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return iter->second;
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}
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for (auto& font : m_fonts) {
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if (has_glyph(font.second, chr))
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return font.second;
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}
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}
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return notfound;
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} // }}}
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int char_width(font_t& font, uint16_t chr) { // {{{
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if (!font)
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return 0;
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if (font->xft == nullptr) {
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if (static_cast<size_t>(chr - font->char_min) < font->width_lut.size())
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return font->width_lut[chr - font->char_min].character_width;
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else
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return font->width;
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}
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auto index = chr % XFT_MAXCHARS;
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while (xft_chars[index] != 0 && xft_chars[index] != chr) index = (index + 1) % XFT_MAXCHARS;
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if (!xft_chars[index]) {
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XGlyphInfo gi;
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FT_UInt glyph = XftCharIndex(m_display, font->xft, (FcChar32)chr);
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XftFontLoadGlyphs(m_display, font->xft, FcFalse, &glyph, 1);
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XftGlyphExtents(m_display, font->xft, &glyph, 1, &gi);
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XftFontUnloadGlyphs(m_display, font->xft, &glyph, 1);
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xft_chars[index] = chr;
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xft_widths[index] = gi.xOff;
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return gi.xOff;
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} else if (xft_chars[index] == chr) {
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return xft_widths[index];
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}
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return 0;
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} // }}}
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XftColor xftcolor() { // {{{
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return m_xftcolor;
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} // }}}
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void allocate_color(color xcolor, bool initial_alloc = false) { // {{{
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if (!initial_alloc)
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XftColorFree(m_display, m_visual, m_colormap, &m_xftcolor);
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if (!XftColorAllocName(m_display, m_visual, m_colormap, xcolor.rgb().c_str(), &m_xftcolor))
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m_logger.err("Failed to allocate color '%s'", xcolor.hex());
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} // }}}
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void set_gcontext_font(gcontext& gc, xcb_font_t font) { // {{{
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const uint32_t values[1]{font};
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m_connection.change_gc(gc, XCB_GC_FONT, values);
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} // }}}
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protected:
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bool open_xcb_font(font_t& fontptr, string fontname) { // {{{
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try {
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font xfont(m_connection, m_connection.generate_id());
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m_connection.open_font_checked(xfont, fontname);
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m_logger.trace("Found X font '%s'", fontname);
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auto query = m_connection.query_font(xfont);
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fontptr->descent = query->font_descent;
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fontptr->height = query->font_ascent + query->font_descent;
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fontptr->width = query->max_bounds.character_width;
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fontptr->char_max = query->max_byte1 << 8 | query->max_char_or_byte2;
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fontptr->char_min = query->min_byte1 << 8 | query->min_char_or_byte2;
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if (query->char_infos_len > 0) {
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auto chars = query.char_infos();
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for (auto it = chars.begin(); it != chars.end(); it++)
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fontptr->width_lut.emplace_back(forward<xcb_charinfo_t>(*it));
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}
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fontptr->ptr = xfont;
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return true;
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} catch (const xpp::x::error::name& e) {
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m_logger.trace("fontmanager: Could not find X font '%s'", fontname);
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} catch (const shared_ptr<xcb_generic_error_t>& e) {
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m_logger.trace("fontmanager: Could not find X font '%s'", fontname);
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} catch (const std::exception& e) {
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m_logger.trace("fontmanager: Could not find X font '%s' (what: %s)", fontname, e.what());
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}
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return false;
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} // }}}
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bool has_glyph(font_t& font, uint16_t chr) { // {{{
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if (font->xft != nullptr) {
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return XftCharExists(m_display, font->xft, (FcChar32)chr) == true;
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} else {
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if (chr < font->char_min || chr > font->char_max)
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return false;
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if (font->width_lut[chr - font->char_min].character_width == 0)
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return false;
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return true;
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}
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} // }}}
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private:
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connection& m_connection;
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const logger& m_logger;
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Display* m_display = nullptr;
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Visual* m_visual = nullptr;
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Colormap m_colormap;
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map<int, font_t> m_fonts;
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int m_fontindex = -1;
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XftColor m_xftcolor;
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};
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namespace {
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/**
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* Configure injection module
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*/
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template <typename T = unique_ptr<fontmanager>>
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di::injector<T> configure_fontmanager() {
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return di::make_injector(configure_connection(), configure_logger());
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}
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}
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LEMONBUDDY_NS_END
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