385 lines
10 KiB
C++
385 lines
10 KiB
C++
#pragma once
|
|
|
|
#include <cairo/cairo-xcb.h>
|
|
|
|
#include <algorithm>
|
|
#include <cmath>
|
|
#include <deque>
|
|
#include <iterator>
|
|
|
|
#include "cairo/font.hpp"
|
|
#include "cairo/surface.hpp"
|
|
#include "cairo/types.hpp"
|
|
#include "cairo/utils.hpp"
|
|
#include "common.hpp"
|
|
#include "components/logger.hpp"
|
|
#include "components/types.hpp"
|
|
#include "errors.hpp"
|
|
#include "utils/color.hpp"
|
|
#include "utils/string.hpp"
|
|
|
|
POLYBAR_NS
|
|
|
|
namespace cairo {
|
|
/**
|
|
* @brief Cairo context
|
|
*/
|
|
class context {
|
|
public:
|
|
explicit context(const surface& surface, const logger& log) : m_c(cairo_create(surface)), m_log(log) {
|
|
auto status = cairo_status(m_c);
|
|
if (status != CAIRO_STATUS_SUCCESS) {
|
|
throw application_error(sstream() << "cairo_status(): " << cairo_status_to_string(status));
|
|
}
|
|
cairo_set_antialias(m_c, CAIRO_ANTIALIAS_GOOD);
|
|
}
|
|
|
|
virtual ~context() {
|
|
cairo_destroy(m_c);
|
|
}
|
|
|
|
operator cairo_t*() const {
|
|
return m_c;
|
|
}
|
|
|
|
context& operator<<(const surface& s) {
|
|
cairo_set_source_surface(m_c, s, 0.0, 0.0);
|
|
return *this;
|
|
}
|
|
|
|
context& operator<<(cairo_operator_t o) {
|
|
cairo_set_operator(m_c, o);
|
|
return *this;
|
|
}
|
|
|
|
context& operator<<(cairo_pattern_t* s) {
|
|
cairo_set_source(m_c, s);
|
|
return *this;
|
|
}
|
|
|
|
context& operator<<(const abspos& p) {
|
|
if (p.clear) {
|
|
cairo_new_path(m_c);
|
|
}
|
|
cairo_move_to(m_c, p.x, p.y);
|
|
return *this;
|
|
}
|
|
|
|
context& operator<<(const relpos& p) {
|
|
cairo_rel_move_to(m_c, p.x, p.y);
|
|
return *this;
|
|
}
|
|
|
|
context& operator<<(const rgba& f) {
|
|
cairo_set_source_rgba(m_c, f.red_d(), f.green_d(), f.blue_d(), f.alpha_d());
|
|
return *this;
|
|
}
|
|
|
|
context& operator<<(const rect& f) {
|
|
cairo_rectangle(m_c, f.x, f.y, f.w, f.h);
|
|
return *this;
|
|
}
|
|
|
|
context& operator<<(const line& l) {
|
|
struct line p {
|
|
l.x1, l.y1, l.x2, l.y2, l.w
|
|
};
|
|
snap(&p.x1, &p.y1);
|
|
snap(&p.x2, &p.y2);
|
|
cairo_move_to(m_c, p.x1, p.y1);
|
|
cairo_line_to(m_c, p.x2, p.y2);
|
|
cairo_set_line_width(m_c, p.w);
|
|
cairo_stroke(m_c);
|
|
return *this;
|
|
}
|
|
|
|
context& operator<<(const translate& d) {
|
|
cairo_translate(m_c, d.x, d.y);
|
|
return *this;
|
|
}
|
|
|
|
context& operator<<(const linear_gradient& l) {
|
|
auto stops = l.steps.size();
|
|
if (stops >= 2) {
|
|
auto pattern = cairo_pattern_create_linear(l.x1, l.y1, l.x2, l.y2);
|
|
auto step = 1.0 / (stops - 1);
|
|
auto offset = 0.0;
|
|
for (auto&& color : l.steps) {
|
|
// clang-format off
|
|
cairo_pattern_add_color_stop_rgba(pattern, offset, color.red_d(), color.green_d(), color.blue_d(), color.alpha_d());
|
|
// clang-format on
|
|
offset += step;
|
|
}
|
|
*this << pattern;
|
|
cairo_pattern_destroy(pattern);
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
context& operator<<(const rounded_corners& c) {
|
|
cairo_new_sub_path(m_c);
|
|
cairo_arc(
|
|
m_c, c.x + c.w - c.radius.top_right, c.y + c.radius.top_right, c.radius.top_right, -90 * degree, 0 * degree);
|
|
cairo_arc(m_c, c.x + c.w - c.radius.bottom_right, c.y + c.h - c.radius.bottom_right, c.radius.bottom_right,
|
|
0 * degree, 90 * degree);
|
|
cairo_arc(m_c, c.x + c.radius.bottom_left, c.y + c.h - c.radius.bottom_left, c.radius.bottom_left, 90 * degree,
|
|
180 * degree);
|
|
cairo_arc(m_c, c.x + c.radius.top_left, c.y + c.radius.top_left, c.radius.top_left, 180 * degree, 270 * degree);
|
|
cairo_close_path(m_c);
|
|
return *this;
|
|
}
|
|
|
|
context& operator<<(const circle_segment& segment) {
|
|
cairo_new_sub_path(m_c);
|
|
cairo_arc(m_c, segment.x, segment.y, segment.radius, segment.angle_from * degree, segment.angle_to * degree);
|
|
switch ((int)segment.angle_to) {
|
|
case 0:
|
|
cairo_rel_line_to(m_c, -segment.w, 0);
|
|
break;
|
|
case 90:
|
|
cairo_rel_line_to(m_c, 0, -segment.w);
|
|
break;
|
|
case 180:
|
|
cairo_rel_line_to(m_c, segment.w, 0);
|
|
break;
|
|
default:
|
|
cairo_rel_line_to(m_c, 0, segment.w);
|
|
break;
|
|
}
|
|
cairo_arc_negative(m_c, segment.x, segment.y, segment.radius - segment.w, segment.angle_to * degree,
|
|
segment.angle_from * degree);
|
|
cairo_close_path(m_c);
|
|
return *this;
|
|
}
|
|
|
|
context& operator<<(const textblock& t) {
|
|
double x, y;
|
|
position(&x, &y);
|
|
|
|
// Prioritize the preferred font
|
|
vector<shared_ptr<font>> fns(m_fonts.begin(), m_fonts.end());
|
|
|
|
if (t.font > 0 && t.font <= std::distance(fns.begin(), fns.end())) {
|
|
std::iter_swap(fns.begin(), fns.begin() + t.font - 1);
|
|
}
|
|
|
|
string utf8 = t.contents;
|
|
string_util::unicode_charlist chars;
|
|
bool success = string_util::utf8_to_ucs4(utf8.c_str(), chars);
|
|
|
|
if (!success) {
|
|
m_log.warn("Dropping invalid UTF8 text '%s'", utf8);
|
|
return *this;
|
|
}
|
|
|
|
while (!chars.empty()) {
|
|
auto remaining = chars.size();
|
|
for (auto&& f : fns) {
|
|
unsigned int matches = 0;
|
|
|
|
// Match as many glyphs as possible if the default/preferred font
|
|
// is being tested. Otherwise test one glyph at a time against
|
|
// the remaining fonts. Roll back to the top of the font list
|
|
// when a glyph has been found.
|
|
if (f == fns.front() && (matches = f->match(chars)) == 0) {
|
|
continue;
|
|
} else if (f != fns.front() && (matches = f->match(chars.front())) == 0) {
|
|
continue;
|
|
}
|
|
|
|
string subset;
|
|
auto end = chars.begin();
|
|
while (matches-- && end != chars.end()) {
|
|
subset += utf8.substr(end->offset, end->length);
|
|
end++;
|
|
}
|
|
|
|
// Use the font
|
|
f->use();
|
|
|
|
// Get subset extents
|
|
cairo_text_extents_t extents;
|
|
f->textwidth(subset, &extents);
|
|
|
|
/*
|
|
* Make sure we don't advance partial pixels, this can cause problems
|
|
* later when cairo renders background colors over half-pixels.
|
|
*/
|
|
extents.x_advance = std::ceil(extents.x_advance);
|
|
|
|
// Draw the background
|
|
if (t.bg_rect.h != 0.0) {
|
|
save();
|
|
cairo_set_operator(m_c, t.bg_operator);
|
|
*this << t.bg;
|
|
cairo_rectangle(m_c, t.bg_rect.x + *t.x_advance, t.bg_rect.y + *t.y_advance,
|
|
t.bg_rect.w + extents.x_advance, t.bg_rect.h);
|
|
cairo_fill(m_c);
|
|
restore();
|
|
}
|
|
|
|
// Render subset
|
|
auto fontextents = f->extents();
|
|
f->render(subset, x, y - (fontextents.descent / 2 - fontextents.height / 4) + f->offset());
|
|
|
|
// Get updated position
|
|
position(&x, nullptr);
|
|
|
|
// Increase position
|
|
*t.x_advance += extents.x_advance;
|
|
*t.y_advance += extents.y_advance;
|
|
|
|
chars.erase(chars.begin(), end);
|
|
break;
|
|
}
|
|
|
|
if (chars.empty()) {
|
|
break;
|
|
} else if (remaining != chars.size()) {
|
|
continue;
|
|
}
|
|
|
|
char unicode[6]{'\0'};
|
|
string_util::ucs4_to_utf8(unicode, chars.begin()->codepoint);
|
|
m_log.warn("Dropping unmatched character %s (U+%04x) in '%s'", unicode, chars.begin()->codepoint, t.contents);
|
|
utf8.erase(chars.begin()->offset, chars.begin()->length);
|
|
for (auto&& c : chars) {
|
|
c.offset -= chars.begin()->length;
|
|
}
|
|
chars.erase(chars.begin(), ++chars.begin());
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
context& operator<<(shared_ptr<font>&& f) {
|
|
m_fonts.emplace_back(forward<decltype(f)>(f));
|
|
return *this;
|
|
}
|
|
|
|
context& save(bool save_point = false) {
|
|
if (save_point) {
|
|
m_points.emplace_front(make_pair<double, double>(0.0, 0.0));
|
|
position(&m_points.front().first, &m_points.front().second);
|
|
}
|
|
m_activegroups++;
|
|
cairo_save(m_c);
|
|
return *this;
|
|
}
|
|
|
|
context& restore(bool restore_point = false) {
|
|
if (!m_activegroups) {
|
|
throw application_error("Unmatched calls to save/restore");
|
|
}
|
|
m_activegroups--;
|
|
cairo_restore(m_c);
|
|
if (restore_point && !m_points.empty()) {
|
|
*this << abspos{m_points.front().first, m_points.front().first};
|
|
m_points.pop_front();
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
context& paint() {
|
|
cairo_paint(m_c);
|
|
return *this;
|
|
}
|
|
|
|
context& paint(double alpha) {
|
|
cairo_paint_with_alpha(m_c, alpha);
|
|
return *this;
|
|
}
|
|
|
|
context& fill(bool preserve = false) {
|
|
if (preserve) {
|
|
cairo_fill_preserve(m_c);
|
|
} else {
|
|
cairo_fill(m_c);
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
context& mask(cairo_pattern_t* pattern) {
|
|
cairo_mask(m_c, pattern);
|
|
return *this;
|
|
}
|
|
|
|
context& pop(cairo_pattern_t** pattern) {
|
|
*pattern = cairo_pop_group(m_c);
|
|
return *this;
|
|
}
|
|
|
|
context& push() {
|
|
cairo_push_group(m_c);
|
|
return *this;
|
|
}
|
|
|
|
context& destroy(cairo_pattern_t** pattern) {
|
|
cairo_pattern_destroy(*pattern);
|
|
*pattern = nullptr;
|
|
return *this;
|
|
}
|
|
|
|
context& clear(bool paint = true) {
|
|
cairo_save(m_c);
|
|
cairo_set_operator(m_c, CAIRO_OPERATOR_CLEAR);
|
|
if (paint) {
|
|
cairo_paint(m_c);
|
|
} else {
|
|
cairo_fill_preserve(m_c);
|
|
}
|
|
cairo_restore(m_c);
|
|
return *this;
|
|
}
|
|
|
|
context& clip(bool preserve = false) {
|
|
if (preserve) {
|
|
cairo_clip_preserve(m_c);
|
|
} else {
|
|
cairo_clip(m_c);
|
|
cairo_new_path(m_c);
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
context& clip(const rect& r) {
|
|
*this << r;
|
|
return clip();
|
|
}
|
|
|
|
context& reset_clip() {
|
|
cairo_reset_clip(m_c);
|
|
return *this;
|
|
}
|
|
|
|
context& position(double* x, double* y = nullptr) {
|
|
if (cairo_has_current_point(m_c)) {
|
|
double x_, y_;
|
|
x = x != nullptr ? x : &x_;
|
|
y = y != nullptr ? y : &y_;
|
|
cairo_get_current_point(m_c, x, y);
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
context& snap(double* x, double* y) {
|
|
cairo_user_to_device(m_c, x, y);
|
|
*x = static_cast<int>(*x + 0.5);
|
|
*y = static_cast<int>(*y + 0.5);
|
|
return *this;
|
|
}
|
|
|
|
protected:
|
|
cairo_t* m_c;
|
|
const logger& m_log;
|
|
vector<shared_ptr<font>> m_fonts;
|
|
std::deque<pair<double, double>> m_points;
|
|
int m_activegroups{0};
|
|
|
|
private:
|
|
const double degree = M_PI / 180.0;
|
|
};
|
|
} // namespace cairo
|
|
|
|
POLYBAR_NS_END
|