mirror of https://github.com/polybar/polybar.git
298 lines
7.6 KiB
C++
298 lines
7.6 KiB
C++
#include <cassert>
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#include "components/parser.hpp"
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#include "components/types.hpp"
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#include "events/signal.hpp"
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#include "events/signal_emitter.hpp"
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#include "utils/color.hpp"
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#include "utils/math.hpp"
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#include "utils/memory.hpp"
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#include "utils/string.hpp"
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POLYBAR_NS
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using namespace signals::parser;
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/**
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* Create instance
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*/
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parser::make_type parser::make() {
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return factory_util::unique<parser>(signal_emitter::make());
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}
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/**
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* Construct parser instance
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*/
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parser::parser(signal_emitter& emitter) : m_sig(emitter) {}
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/**
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* Process input string
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*/
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void parser::parse(const bar_settings& bar, string data) {
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while (!data.empty()) {
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size_t pos{string::npos};
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if (data.compare(0, 2, "%{") == 0 && (pos = data.find('}')) != string::npos) {
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codeblock(data.substr(2, pos - 2), bar);
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data.erase(0, pos + 1);
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} else if ((pos = data.find("%{")) != string::npos) {
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data.erase(0, text(data.substr(0, pos)));
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} else {
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data.erase(0, text(data.substr(0)));
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}
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}
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if (!m_actions.empty()) {
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throw unclosed_actionblocks(to_string(m_actions.size()) + " unclosed action block(s)");
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}
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}
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/**
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* Process contents within tag blocks, i.e: %{...}
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*/
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void parser::codeblock(string&& data, const bar_settings& bar) {
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size_t pos;
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while (data.length()) {
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data = string_util::ltrim(move(data), ' ');
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if (data.empty()) {
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break;
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}
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char tag{data[0]};
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string value;
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// Remove the tag
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data.erase(0, 1);
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if ((pos = data.find_first_of(" }")) != string::npos) {
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value = data.substr(0, pos);
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} else {
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value = data;
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}
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switch (tag) {
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case 'B':
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m_sig.emit(change_background{parse_color(value, bar.background)});
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break;
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case 'F':
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m_sig.emit(change_foreground{parse_color(value, bar.foreground)});
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break;
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case 'T':
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m_sig.emit(change_font{parse_fontindex(value)});
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break;
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case 'U':
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m_sig.emit(change_underline{parse_color(value, bar.underline.color)});
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m_sig.emit(change_overline{parse_color(value, bar.overline.color)});
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break;
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case 'u':
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m_sig.emit(change_underline{parse_color(value, bar.underline.color)});
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break;
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case 'o':
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m_sig.emit(change_overline{parse_color(value, bar.overline.color)});
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break;
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case 'R':
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m_sig.emit(change_background{parse_color(value, bar.foreground)});
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m_sig.emit(change_foreground{parse_color(value, bar.background)});
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break;
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case 'O':
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m_sig.emit(offset_pixel{static_cast<int16_t>(std::atoi(value.c_str()))});
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break;
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case 'l':
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m_sig.emit(change_alignment{alignment::LEFT});
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break;
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case 'c':
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m_sig.emit(change_alignment{alignment::CENTER});
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break;
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case 'r':
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m_sig.emit(change_alignment{alignment::RIGHT});
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break;
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case '+':
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m_sig.emit(attribute_set{parse_attr(value[0])});
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break;
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case '-':
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m_sig.emit(attribute_unset{parse_attr(value[0])});
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break;
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case '!':
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m_sig.emit(attribute_toggle{parse_attr(value[0])});
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break;
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case 'A':
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if (isdigit(data[0]) || data[0] == ':') {
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value = parse_action_cmd(data.substr(data[0] != ':' ? 1 : 0));
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mousebtn btn = parse_action_btn(data);
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m_actions.push_back(static_cast<int>(btn));
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m_sig.emit(action_begin{action{btn, value}});
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// make sure we strip the correct length (btn+wrapping colons)
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if (value[0] != ':') {
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value += "0";
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}
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value += "::";
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} else if (!m_actions.empty()) {
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m_sig.emit(action_end{parse_action_btn(value)});
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m_actions.pop_back();
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}
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break;
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default:
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throw unrecognized_token("Unrecognized token '" + string{tag} + "'");
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}
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if (!data.empty()) {
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data.erase(0, !value.empty() ? value.length() : 1);
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}
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}
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}
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/**
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* Process text contents
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*/
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size_t parser::text(string&& data) {
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const uint8_t* utf{reinterpret_cast<const uint8_t*>(&data[0])};
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// clang-format off
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if (utf[0] < 0x80) {
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size_t pos{0};
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// grab consecutive ascii chars
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while (utf[pos] && utf[pos] < 0x80) {
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packet pkt{};
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size_t limit{memory_util::countof(pkt.data)};
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size_t len{0};
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while (len + 1 < limit && utf[pos] && utf[pos] < 0x80) {
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pkt.data[len++] = utf[pos++];
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}
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if (!len) {
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break;
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}
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pkt.length = len;
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m_sig.emit(write_text_string{move(pkt)});
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}
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if (pos > 0) {
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return pos;
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}
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} else if ((utf[0] & 0xe0) == 0xc0) { // 2 byte utf-8 sequence
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m_sig.emit(write_text_unicode{static_cast<uint16_t>(((utf[0] & 0x1f) << 6) | (utf[1] & 0x3f))});
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return 2;
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} else if ((utf[0] & 0xf0) == 0xe0) { // 3 byte utf-8 sequence
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m_sig.emit(write_text_unicode{static_cast<uint16_t>(((utf[0] & 0x0f) << 12) | ((utf[1] & 0x3f) << 6) | (utf[2] & 0x3f))});
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return 3;
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} else if ((utf[0] & 0xf8) == 0xf0) { // 4 byte utf-8 sequence
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// m_sig.emit(write_text_unicode{((utf[0] & 0x07) << 18) | ((utf[1] & 0x3f) << 12) | ((utf[2] & 0x3f) << 6) | (utf[3] & 0x3f)});
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m_sig.emit(write_text_unicode{static_cast<uint16_t>(0xfffd)});
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return 4;
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} else if ((utf[0] & 0xfc) == 0xf8) { // 5 byte utf-8 sequence
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// m_sig.emit(write_text_unicode{((utf[0] & 0x03) << 24) | ((utf[1] & 0x3f) << 18) | ((utf[2] & 0x3f) << 12) | ((utf[3] & 0x3f) << 6) | (utf[4] & 0x3f)});
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m_sig.emit(write_text_unicode{static_cast<uint16_t>(0xfffd)});
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return 5;
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} else if ((utf[0] & 0xfe) == 0xfc) { // 6 byte utf-8 sequence
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// m_sig.emit(write_text_unicode{((utf[0] & 0x01) << 30) | ((utf[1] & 0x3f) << 24) | ((utf[2] & 0x3f) << 18) | ((utf[3] & 0x3f) << 12) | ((utf[4] & 0x3f) << 6) | (utf[5] & 0x3f)});
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m_sig.emit(write_text_unicode{static_cast<uint16_t>(0xfffd)});
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return 6;
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}
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// clang-format on
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if (utf[0] < 0x80) {
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m_sig.emit(write_text_ascii{utf[0]});
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}
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return 1;
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}
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/**
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* Process color hex string and convert it to the correct value
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*/
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uint32_t parser::parse_color(const string& s, uint32_t fallback) {
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uint32_t color{0};
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if (s.empty() || s[0] == '-' || (color = color_util::parse(s, fallback)) == fallback) {
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return fallback;
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}
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return color_util::premultiply_alpha(color);
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}
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/**
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* Process font index and convert it to the correct value
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*/
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uint8_t parser::parse_fontindex(const string& s) {
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if (s.empty() || s[0] == '-') {
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return 0;
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}
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try {
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return std::stoul(s, nullptr, 10);
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} catch (const std::invalid_argument& err) {
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return 0;
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}
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}
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/**
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* Process attribute token and convert it to the correct value
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*/
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attribute parser::parse_attr(const char attr) {
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switch (attr) {
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case 'o':
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return attribute::OVERLINE;
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case 'u':
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return attribute::UNDERLINE;
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default:
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throw unrecognized_token("Unrecognized attribute '" + string{attr} + "'");
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}
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}
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/**
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* Process action button token and convert it to the correct value
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*/
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mousebtn parser::parse_action_btn(const string& data) {
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if (data[0] == ':') {
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return mousebtn::LEFT;
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} else if (isdigit(data[0])) {
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return static_cast<mousebtn>(data[0] - '0');
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} else if (!m_actions.empty()) {
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return static_cast<mousebtn>(m_actions.back());
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} else {
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return mousebtn::NONE;
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}
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}
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/**
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* Process action command string
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*/
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string parser::parse_action_cmd(string&& data) {
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if (data[0] != ':') {
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return "";
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}
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size_t end{1};
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while ((end = data.find(':', end)) != string::npos && data[end - 1] == '\\') {
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end++;
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}
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if (end == string::npos) {
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return "";
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}
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return data.substr(1, end - 1);
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}
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POLYBAR_NS_END
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