mirror of https://github.com/polybar/polybar.git
324 lines
8.7 KiB
C++
324 lines
8.7 KiB
C++
#pragma once
|
|
|
|
#include <cairo/cairo-xcb.h>
|
|
#include <algorithm>
|
|
#include <cmath>
|
|
#include <deque>
|
|
|
|
#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 unsigned int& c) {
|
|
// clang-format off
|
|
cairo_set_source_rgba(m_c,
|
|
color_util::red_channel<unsigned char>(c) / 255.0,
|
|
color_util::green_channel<unsigned char>(c) / 255.0,
|
|
color_util::blue_channel<unsigned char>(c) / 255.0,
|
|
color_util::alpha_channel<unsigned char>(c) / 255.0);
|
|
// clang-format on
|
|
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.r, f.g, f.b, f.a);
|
|
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 displace& d) {
|
|
cairo_set_operator(m_c, CAIRO_OPERATOR_SOURCE);
|
|
cairo_set_source_surface(m_c, cairo_get_target(m_c), d.x - d.w, d.y);
|
|
cairo_rectangle(m_c, d.x - d.w, d.y, d.x + d.dx, d.y + d.dy);
|
|
cairo_fill(m_c);
|
|
cairo_surface_flush(cairo_get_target(m_c));
|
|
return *this;
|
|
}
|
|
|
|
context& operator<<(const linear_gradient& l) {
|
|
if (l.steps.size() >= 2) {
|
|
auto pattern = cairo_pattern_create_linear(l.x1, l.y1, l.x2, l.y2);
|
|
*this << pattern;
|
|
auto stops = l.steps.size();
|
|
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_util::red_channel<unsigned char>(color) / 255.0,
|
|
color_util::green_channel<unsigned char>(color) / 255.0,
|
|
color_util::blue_channel<unsigned char>(color) / 255.0,
|
|
color_util::alpha_channel<unsigned char>(color) / 255.0);
|
|
// clang-format on
|
|
offset += step;
|
|
}
|
|
cairo_pattern_destroy(pattern);
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
context& operator<<(const rounded_corners& c) {
|
|
double radius = c.radius / 1.0;
|
|
double d = M_PI / 180.0;
|
|
cairo_new_sub_path(m_c);
|
|
cairo_arc(m_c, c.x + c.w - radius, c.y + radius, radius, -90 * d, 0 * d);
|
|
cairo_arc(m_c, c.x + c.w - radius, c.y + c.h - radius, radius, 0 * d, 90 * d);
|
|
cairo_arc(m_c, c.x + radius, c.y + c.h - radius, radius, 90 * d, 180 * d);
|
|
cairo_arc(m_c, c.x + radius, c.y + radius, radius, 180 * d, 270 * d);
|
|
cairo_close_path(m_c);
|
|
return *this;
|
|
}
|
|
|
|
context& operator<<(const textblock& t) {
|
|
double x, y;
|
|
position(&x, &y);
|
|
|
|
// Sort the fontlist so that the
|
|
// preferred font gets prioritized
|
|
auto& fns = m_fonts;
|
|
std::sort(fns.begin(), fns.end(), [&](const unique_ptr<font>& a, const unique_ptr<font>&) {
|
|
if (t.fontindex > 0 && std::distance(fns.begin(), std::find(fns.begin(), fns.end(), a)) == t.fontindex - 1) {
|
|
return -1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
});
|
|
|
|
string utf8 = string(t.contents);
|
|
utils::unicode_charlist chars;
|
|
utils::utf8_to_ucs4((const unsigned char*)utf8.c_str(), chars);
|
|
|
|
while (!chars.empty()) {
|
|
auto remaining = chars.size();
|
|
for (auto&& f : fns) {
|
|
auto matches = f->match(chars);
|
|
if (!matches) {
|
|
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);
|
|
|
|
save(true);
|
|
{
|
|
*this << t.bg;
|
|
cairo_set_operator(m_c, static_cast<cairo_operator_t>(t.bg_operator));
|
|
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(true);
|
|
|
|
// Render subset
|
|
auto fontextents = f->extents();
|
|
f->render(subset, x, y - (extents.height / 2.0 + extents.y_bearing + fontextents.descent) + 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'};
|
|
utils::ucs4_to_utf8(unicode, chars.begin()->codepoint);
|
|
m_log.warn("Dropping unmatched character %s (U+%04x)", unicode, chars.begin()->codepoint);
|
|
utf8.erase(chars.begin()->offset, chars.begin()->length);
|
|
for (auto&& c : chars) {
|
|
c.offset -= chars.begin()->length;
|
|
}
|
|
chars.erase(chars.begin(), ++chars.begin());
|
|
}
|
|
|
|
// *this << abspos{x, y};
|
|
|
|
return *this;
|
|
}
|
|
|
|
context& operator<<(unique_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);
|
|
}
|
|
cairo_save(m_c);
|
|
return *this;
|
|
}
|
|
|
|
context& restore(bool restore_point = false) {
|
|
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& clear() {
|
|
cairo_save(m_c);
|
|
cairo_set_operator(m_c, CAIRO_OPERATOR_SOURCE);
|
|
cairo_set_source_rgba(m_c, 0.0, 0.0, 0.0, 0.0);
|
|
cairo_paint(m_c);
|
|
cairo_restore(m_c);
|
|
return *this;
|
|
}
|
|
|
|
context& clip(const rect& r) {
|
|
*this << r;
|
|
cairo_clip(m_c);
|
|
cairo_new_path(m_c);
|
|
return *this;
|
|
}
|
|
|
|
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 = ((int)*x + 0.5);
|
|
*y = ((int)*y + 0.5);
|
|
return *this;
|
|
}
|
|
|
|
protected:
|
|
cairo_t* m_c;
|
|
const logger& m_log;
|
|
vector<unique_ptr<font>> m_fonts;
|
|
std::deque<pair<double, double>> m_points;
|
|
};
|
|
}
|
|
|
|
POLYBAR_NS_END
|