mirror of https://github.com/polybar/polybar.git
280 lines
7.5 KiB
C++
280 lines
7.5 KiB
C++
#include <cassert>
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#include "components/logger.hpp"
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#include "components/parser.hpp"
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#include "components/signals.hpp"
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#include "components/types.hpp"
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#include "utils/math.hpp"
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#include "utils/string.hpp"
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POLYBAR_NS
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/**
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* Construct parser instance
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*/
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parser::parser(const logger& logger, const bar_settings& bar) : m_log(logger), m_bar(bar) {
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assert(g_signals::parser::background_change != nullptr);
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assert(g_signals::parser::foreground_change != nullptr);
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assert(g_signals::parser::underline_change != nullptr);
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assert(g_signals::parser::overline_change != nullptr);
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assert(g_signals::parser::alignment_change != nullptr);
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assert(g_signals::parser::attribute_set != nullptr);
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assert(g_signals::parser::attribute_unset != nullptr);
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assert(g_signals::parser::attribute_toggle != nullptr);
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assert(g_signals::parser::font_change != nullptr);
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assert(g_signals::parser::pixel_offset != nullptr);
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assert(g_signals::parser::action_block_open != nullptr);
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assert(g_signals::parser::action_block_close != nullptr);
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assert(g_signals::parser::ascii_text_write != nullptr);
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assert(g_signals::parser::unicode_text_write != nullptr);
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assert(g_signals::parser::string_write != nullptr);
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}
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/**
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* Process input string
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*/
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void parser::operator()(string data) {
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size_t pos;
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m_log.trace_x("parser: %s", data);
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while (data.length()) {
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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));
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data.erase(0, pos + 1);
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} else {
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if ((pos = data.find("%{")) == string::npos) {
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pos = data.length();
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}
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data.erase(0, text(data.substr(0, pos)));
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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) {
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size_t pos;
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while (data.length()) {
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data = string_util::ltrim(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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g_signals::parser::background_change(parse_color(value, m_bar.background));
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break;
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case 'F':
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g_signals::parser::foreground_change(parse_color(value, m_bar.foreground));
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break;
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case 'T':
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g_signals::parser::font_change(parse_fontindex(value));
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break;
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case 'U':
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g_signals::parser::underline_change(parse_color(value, m_bar.underline.color));
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g_signals::parser::overline_change(parse_color(value, m_bar.overline.color));
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break;
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case 'u':
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g_signals::parser::underline_change(parse_color(value, m_bar.underline.color));
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break;
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case 'o':
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g_signals::parser::overline_change(parse_color(value, m_bar.overline.color));
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break;
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case 'R':
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g_signals::parser::background_change(m_bar.foreground);
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g_signals::parser::foreground_change(m_bar.background);
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break;
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case 'O':
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g_signals::parser::pixel_offset(atoi(value.c_str()));
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break;
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case 'l':
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g_signals::parser::alignment_change(alignment::LEFT);
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break;
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case 'c':
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g_signals::parser::alignment_change(alignment::CENTER);
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break;
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case 'r':
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g_signals::parser::alignment_change(alignment::RIGHT);
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break;
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case '+':
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g_signals::parser::attribute_set(parse_attr(value[0]));
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break;
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case '-':
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g_signals::parser::attribute_unset(parse_attr(value[0]));
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break;
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case '!':
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g_signals::parser::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);
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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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g_signals::parser::action_block_open(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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g_signals::parser::action_block_close(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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uint8_t* utf = (uint8_t*)data.c_str();
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if (utf[0] < 0x80) {
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// grab all consecutive ascii chars
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size_t next_tag = data.find("%{");
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if (next_tag != string::npos) {
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data.erase(next_tag);
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}
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size_t n = 0;
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while (utf[n] != '\0' && utf[++n] < 0x80) {
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;
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}
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g_signals::parser::string_write(data.substr(0, n).c_str(), n);
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return n;
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} else if ((utf[0] & 0xe0) == 0xc0) { // 2 byte utf-8 sequence
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g_signals::parser::unicode_text_write((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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g_signals::parser::unicode_text_write((utf[0] & 0xf) << 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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g_signals::parser::unicode_text_write(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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g_signals::parser::unicode_text_write(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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g_signals::parser::unicode_text_write(0xfffd);
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return 6;
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} else { // invalid utf-8 sequence
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g_signals::parser::ascii_text_write(utf[0]);
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return 1;
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}
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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(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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int8_t parser::parse_fontindex(string s) {
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if (s.empty() || s[0] == '-') {
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return -1;
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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 -1;
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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(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(const string& data) {
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size_t start, end;
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if ((start = data.find(':')) == string::npos) {
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return "";
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}
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if ((end = data.find(':', start + 1)) == string::npos) {
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return "";
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}
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return string_util::trim(data.substr(start, end), ':');
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}
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POLYBAR_NS_END
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