305 lines
12 KiB
C++
305 lines
12 KiB
C++
// Copyright(c) 2015-present, Gabi Melman, mguludag and spdlog contributors.
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// Distributed under the MIT License (http://opensource.org/licenses/MIT)
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#pragma once
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//
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// Custom sink for QPlainTextEdit or QTextEdit and its children (QTextBrowser...
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// etc) Building and using requires Qt library.
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//
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// Warning: the qt_sink won't be notified if the target widget is destroyed.
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// If the widget's lifetime can be shorter than the logger's one, you should provide some permanent
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// QObject, and then use a standard signal/slot.
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//
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#include "spdlog/common.h"
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#include "spdlog/details/log_msg.h"
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#include "spdlog/details/synchronous_factory.h"
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#include "spdlog/sinks/base_sink.h"
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#include <array>
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#include <QPlainTextEdit>
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#include <QTextEdit>
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//
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// qt_sink class
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//
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namespace spdlog {
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namespace sinks {
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template <typename Mutex>
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class qt_sink : public base_sink<Mutex> {
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public:
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qt_sink(QObject *qt_object, std::string meta_method)
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: qt_object_(qt_object),
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meta_method_(std::move(meta_method)) {
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if (!qt_object_) {
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throw_spdlog_ex("qt_sink: qt_object is null");
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}
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}
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~qt_sink() { flush_(); }
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protected:
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void sink_it_(const details::log_msg &msg) override {
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memory_buf_t formatted;
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base_sink<Mutex>::formatter_->format(msg, formatted);
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const string_view_t str = string_view_t(formatted.data(), formatted.size());
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QMetaObject::invokeMethod(
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qt_object_, meta_method_.c_str(), Qt::AutoConnection,
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Q_ARG(QString, QString::fromUtf8(str.data(), static_cast<int>(str.size())).trimmed()));
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}
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void flush_() override {}
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private:
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QObject *qt_object_ = nullptr;
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std::string meta_method_;
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};
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// Qt color sink to QTextEdit.
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// Color location is determined by the sink log pattern like in the rest of spdlog sinks.
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// Colors can be modified if needed using sink->set_color(level, qtTextCharFormat).
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// max_lines is the maximum number of lines that the sink will hold before removing the oldest
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// lines. By default, only ascii (latin1) is supported by this sink. Set is_utf8 to true if utf8
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// support is needed.
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template <typename Mutex>
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class qt_color_sink : public base_sink<Mutex> {
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public:
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qt_color_sink(QTextEdit *qt_text_edit,
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int max_lines,
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bool dark_colors = false,
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bool is_utf8 = false)
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: qt_text_edit_(qt_text_edit),
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max_lines_(max_lines),
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is_utf8_(is_utf8) {
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if (!qt_text_edit_) {
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throw_spdlog_ex("qt_color_text_sink: text_edit is null");
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}
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default_color_ = qt_text_edit_->currentCharFormat();
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// set colors
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QTextCharFormat format;
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// trace
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format.setForeground(dark_colors ? Qt::darkGray : Qt::gray);
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colors_.at(level::trace) = format;
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// debug
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format.setForeground(dark_colors ? Qt::darkCyan : Qt::cyan);
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colors_.at(level::debug) = format;
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// info
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format.setForeground(dark_colors ? Qt::darkGreen : Qt::green);
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colors_.at(level::info) = format;
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// warn
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format.setForeground(dark_colors ? Qt::darkYellow : Qt::yellow);
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colors_.at(level::warn) = format;
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// err
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format.setForeground(Qt::red);
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colors_.at(level::err) = format;
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// critical
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format.setForeground(Qt::white);
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format.setBackground(Qt::red);
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colors_.at(level::critical) = format;
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}
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~qt_color_sink() { flush_(); }
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void set_default_color(QTextCharFormat format) {
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// std::lock_guard<Mutex> lock(base_sink<Mutex>::mutex_);
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default_color_ = format;
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}
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void set_level_color(level::level_enum color_level, QTextCharFormat format) {
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// std::lock_guard<Mutex> lock(base_sink<Mutex>::mutex_);
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colors_.at(static_cast<size_t>(color_level)) = format;
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}
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QTextCharFormat &get_level_color(level::level_enum color_level) {
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std::lock_guard<Mutex> lock(base_sink<Mutex>::mutex_);
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return colors_.at(static_cast<size_t>(color_level));
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}
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QTextCharFormat &get_default_color() {
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std::lock_guard<Mutex> lock(base_sink<Mutex>::mutex_);
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return default_color_;
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}
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protected:
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struct invoke_params {
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invoke_params(int max_lines,
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QTextEdit *q_text_edit,
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QString payload,
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QTextCharFormat default_color,
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QTextCharFormat level_color,
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int color_range_start,
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int color_range_end)
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: max_lines(max_lines),
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q_text_edit(q_text_edit),
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payload(std::move(payload)),
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default_color(default_color),
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level_color(level_color),
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color_range_start(color_range_start),
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color_range_end(color_range_end) {}
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int max_lines;
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QTextEdit *q_text_edit;
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QString payload;
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QTextCharFormat default_color;
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QTextCharFormat level_color;
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int color_range_start;
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int color_range_end;
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};
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void sink_it_(const details::log_msg &msg) override {
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memory_buf_t formatted;
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base_sink<Mutex>::formatter_->format(msg, formatted);
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const string_view_t str = string_view_t(formatted.data(), formatted.size());
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// apply the color to the color range in the formatted message.
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QString payload;
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int color_range_start = static_cast<int>(msg.color_range_start);
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int color_range_end = static_cast<int>(msg.color_range_end);
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if (is_utf8_) {
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payload = QString::fromUtf8(str.data(), static_cast<int>(str.size()));
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// convert color ranges from byte index to character index.
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if (msg.color_range_start < msg.color_range_end) {
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color_range_start = QString::fromUtf8(str.data(), msg.color_range_start).size();
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color_range_end = QString::fromUtf8(str.data(), msg.color_range_end).size();
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}
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} else {
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payload = QString::fromLatin1(str.data(), static_cast<int>(str.size()));
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}
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invoke_params params{max_lines_, // max lines
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qt_text_edit_, // text edit to append to
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std::move(payload), // text to append
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default_color_, // default color
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colors_.at(msg.level), // color to apply
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color_range_start, // color range start
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color_range_end}; // color range end
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QMetaObject::invokeMethod(
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qt_text_edit_, [params]() { invoke_method_(params); }, Qt::AutoConnection);
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}
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void flush_() override {}
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// Add colored text to the text edit widget. This method is invoked in the GUI thread.
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// It is a static method to ensure that it is handled correctly even if the sink is destroyed
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// prematurely before it is invoked.
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static void invoke_method_(invoke_params params) {
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auto *document = params.q_text_edit->document();
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QTextCursor cursor(document);
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// remove first blocks if number of blocks exceeds max_lines
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while (document->blockCount() > params.max_lines) {
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cursor.select(QTextCursor::BlockUnderCursor);
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cursor.removeSelectedText();
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cursor.deleteChar(); // delete the newline after the block
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}
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cursor.movePosition(QTextCursor::End);
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cursor.setCharFormat(params.default_color);
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// if color range not specified or not not valid, just append the text with default color
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if (params.color_range_end <= params.color_range_start) {
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cursor.insertText(params.payload);
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return;
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}
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// insert the text before the color range
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cursor.insertText(params.payload.left(params.color_range_start));
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// insert the colorized text
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cursor.setCharFormat(params.level_color);
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cursor.insertText(params.payload.mid(params.color_range_start,
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params.color_range_end - params.color_range_start));
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// insert the text after the color range with default format
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cursor.setCharFormat(params.default_color);
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cursor.insertText(params.payload.mid(params.color_range_end));
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}
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QTextEdit *qt_text_edit_;
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int max_lines_;
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bool is_utf8_;
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QTextCharFormat default_color_;
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std::array<QTextCharFormat, level::n_levels> colors_;
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};
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#include "spdlog/details/null_mutex.h"
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#include <mutex>
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using qt_sink_mt = qt_sink<std::mutex>;
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using qt_sink_st = qt_sink<details::null_mutex>;
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using qt_color_sink_mt = qt_color_sink<std::mutex>;
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using qt_color_sink_st = qt_color_sink<details::null_mutex>;
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} // namespace sinks
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//
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// Factory functions
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//
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// log to QTextEdit
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template <typename Factory = spdlog::synchronous_factory>
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inline std::shared_ptr<logger> qt_logger_mt(const std::string &logger_name,
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QTextEdit *qt_object,
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const std::string &meta_method = "append") {
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return Factory::template create<sinks::qt_sink_mt>(logger_name, qt_object, meta_method);
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}
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template <typename Factory = spdlog::synchronous_factory>
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inline std::shared_ptr<logger> qt_logger_st(const std::string &logger_name,
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QTextEdit *qt_object,
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const std::string &meta_method = "append") {
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return Factory::template create<sinks::qt_sink_st>(logger_name, qt_object, meta_method);
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}
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// log to QPlainTextEdit
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template <typename Factory = spdlog::synchronous_factory>
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inline std::shared_ptr<logger> qt_logger_mt(const std::string &logger_name,
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QPlainTextEdit *qt_object,
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const std::string &meta_method = "appendPlainText") {
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return Factory::template create<sinks::qt_sink_mt>(logger_name, qt_object, meta_method);
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}
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template <typename Factory = spdlog::synchronous_factory>
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inline std::shared_ptr<logger> qt_logger_st(const std::string &logger_name,
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QPlainTextEdit *qt_object,
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const std::string &meta_method = "appendPlainText") {
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return Factory::template create<sinks::qt_sink_st>(logger_name, qt_object, meta_method);
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}
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// log to QObject
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template <typename Factory = spdlog::synchronous_factory>
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inline std::shared_ptr<logger> qt_logger_mt(const std::string &logger_name,
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QObject *qt_object,
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const std::string &meta_method) {
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return Factory::template create<sinks::qt_sink_mt>(logger_name, qt_object, meta_method);
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}
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template <typename Factory = spdlog::synchronous_factory>
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inline std::shared_ptr<logger> qt_logger_st(const std::string &logger_name,
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QObject *qt_object,
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const std::string &meta_method) {
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return Factory::template create<sinks::qt_sink_st>(logger_name, qt_object, meta_method);
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}
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// log to QTextEdit with colorized output
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template <typename Factory = spdlog::synchronous_factory>
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inline std::shared_ptr<logger> qt_color_logger_mt(const std::string &logger_name,
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QTextEdit *qt_text_edit,
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int max_lines,
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bool is_utf8 = false) {
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return Factory::template create<sinks::qt_color_sink_mt>(logger_name, qt_text_edit, max_lines,
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false, is_utf8);
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}
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template <typename Factory = spdlog::synchronous_factory>
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inline std::shared_ptr<logger> qt_color_logger_st(const std::string &logger_name,
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QTextEdit *qt_text_edit,
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int max_lines,
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bool is_utf8 = false) {
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return Factory::template create<sinks::qt_color_sink_st>(logger_name, qt_text_edit, max_lines,
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false, is_utf8);
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}
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} // namespace spdlog
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