139 lines
3.8 KiB
C++
139 lines
3.8 KiB
C++
// This file is part of Desktop App Toolkit,
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// a set of libraries for developing nice desktop applications.
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//
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// For license and copyright information please follow this link:
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// https://github.com/desktop-app/legal/blob/master/LEGAL
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//
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#include "ui/text/text_utilities.h"
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#include "base/algorithm.h"
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#include "base/qt/qt_string_view.h"
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#include <QtCore/QRegularExpression>
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namespace Ui {
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namespace Text {
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namespace {
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TextWithEntities WithSingleEntity(
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const QString &text,
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EntityType type,
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const QString &data = QString()) {
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auto result = TextWithEntities{ text };
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result.entities.push_back({ type, 0, int(text.size()), data });
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return result;
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}
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} // namespace
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TextWithEntities Bold(const QString &text) {
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return WithSingleEntity(text, EntityType::Bold);
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}
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TextWithEntities Semibold(const QString &text) {
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return WithSingleEntity(text, EntityType::Semibold);
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}
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TextWithEntities Italic(const QString &text) {
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return WithSingleEntity(text, EntityType::Italic);
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}
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TextWithEntities Link(const QString &text, const QString &url) {
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return WithSingleEntity(text, EntityType::CustomUrl, url);
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}
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TextWithEntities Link(const QString &text, int index) {
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return Link(text, QString("internal:index") + QChar(index));
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}
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TextWithEntities PlainLink(const QString &text) {
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return WithSingleEntity(text, EntityType::PlainLink);
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}
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TextWithEntities Wrapped(
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TextWithEntities text,
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EntityType type,
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const QString &data) {
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text.entities.insert(
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text.entities.begin(),
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{ type, 0, int(text.text.size()), data });
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return text;
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}
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TextWithEntities RichLangValue(const QString &text) {
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static const auto kStart = QRegularExpression("(\\*\\*|__)");
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auto result = TextWithEntities();
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auto offset = 0;
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while (offset < text.size()) {
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const auto m = kStart.match(text, offset);
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if (!m.hasMatch()) {
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result.text.append(base::StringViewMid(text, offset));
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break;
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}
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const auto position = m.capturedStart();
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const auto from = m.capturedEnd();
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const auto tag = m.capturedView();
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const auto till = text.indexOf(tag, from + 1);
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if (till <= from) {
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offset = from;
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continue;
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}
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if (position > offset) {
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result.text.append(base::StringViewMid(text, offset, position - offset));
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}
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const auto type = (tag == qstr("__"))
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? EntityType::Italic
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: EntityType::Bold;
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result.entities.push_back({ type, int(result.text.size()), int(till - from) });
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result.text.append(base::StringViewMid(text, from, till - from));
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offset = till + tag.size();
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}
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return result;
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}
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TextWithEntities Mid(const TextWithEntities &text, int position, int n) {
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if (n == -1) {
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n = int(text.text.size()) - position;
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}
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const auto midEnd = (position + n);
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auto entities = ranges::views::all(
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text.entities
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) | ranges::views::filter([&](const EntityInText &entity) {
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// Intersects of ranges.
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const auto l1 = entity.offset();
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const auto r1 = entity.offset() + entity.length() - 1;
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const auto l2 = position;
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const auto r2 = midEnd - 1;
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return !(l1 > r2 || l2 > r1);
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}) | ranges::views::transform([&](const EntityInText &entity) {
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if ((entity.offset() == position) && (entity.length() == n)) {
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return entity;
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}
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const auto start = std::max(entity.offset(), position);
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const auto end = std::min(entity.offset() + entity.length(), midEnd);
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return EntityInText(
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entity.type(),
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start - position,
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end - start,
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entity.data());
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}) | ranges::to<EntitiesInText>();
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return {
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.text = text.text.mid(position, n),
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.entities = std::move(entities),
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};
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}
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TextWithEntities Filtered(
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const TextWithEntities &text,
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const std::vector<EntityType> &types) {
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auto result = ranges::views::all(
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text.entities
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) | ranges::views::filter([&](const EntityInText &entity) {
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return ranges::contains(types, entity.type());
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}) | ranges::to<EntitiesInText>();
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return { .text = text.text, .entities = std::move(result) };
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}
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} // namespace Text
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} // namespace Ui
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