397 lines
12 KiB
C++
397 lines
12 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#pragma once
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#include "core/click_handler.h"
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#include "ui/text/text_entity.h"
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#include "base/flags.h"
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#include <private/qfontengine_p.h>
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static const QChar TextCommand(0x0010);
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enum TextCommands {
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TextCommandBold = 0x01,
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TextCommandNoBold = 0x02,
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TextCommandItalic = 0x03,
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TextCommandNoItalic = 0x04,
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TextCommandUnderline = 0x05,
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TextCommandNoUnderline = 0x06,
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TextCommandStrikeOut = 0x07,
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TextCommandNoStrikeOut = 0x08,
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TextCommandSemibold = 0x09,
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TextCommandNoSemibold = 0x0A,
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TextCommandLinkIndex = 0x0B, // 0 - NoLink
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TextCommandLinkText = 0x0C,
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TextCommandSkipBlock = 0x0D,
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TextCommandLangTag = 0x20,
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};
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struct TextParseOptions {
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int32 flags;
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int32 maxw;
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int32 maxh;
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Qt::LayoutDirection dir;
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};
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extern const TextParseOptions _defaultOptions, _textPlainOptions;
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enum class TextSelectType {
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Letters = 0x01,
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Words = 0x02,
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Paragraphs = 0x03,
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};
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struct TextSelection {
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constexpr TextSelection() : from(0), to(0) {
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}
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constexpr TextSelection(uint16 from, uint16 to) : from(from), to(to) {
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}
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constexpr bool empty() const {
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return from == to;
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}
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uint16 from;
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uint16 to;
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};
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inline bool operator==(TextSelection a, TextSelection b) {
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return a.from == b.from && a.to == b.to;
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}
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inline bool operator!=(TextSelection a, TextSelection b) {
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return !(a == b);
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}
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static constexpr TextSelection AllTextSelection = { 0, 0xFFFF };
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namespace Ui {
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namespace Text {
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class AbstractBlock;
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struct StateRequest {
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enum class Flag {
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BreakEverywhere = (1 << 0),
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LookupSymbol = (1 << 1),
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LookupLink = (1 << 2),
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LookupCustomTooltip = (1 << 3),
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};
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using Flags = base::flags<Flag>;
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friend inline constexpr auto is_flag_type(Flag) { return true; };
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StateRequest() {
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}
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style::align align = style::al_left;
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Flags flags = Flag::LookupLink;
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};
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struct StateResult {
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ClickHandlerPtr link;
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bool uponSymbol = false;
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bool afterSymbol = false;
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uint16 symbol = 0;
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};
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struct StateRequestElided : public StateRequest {
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StateRequestElided() {
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}
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StateRequestElided(const StateRequest &other) : StateRequest(other) {
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}
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int lines = 1;
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int removeFromEnd = 0;
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};
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class String {
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public:
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String(int32 minResizeWidth = QFIXED_MAX);
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String(const style::TextStyle &st, const QString &text, const TextParseOptions &options = _defaultOptions, int32 minResizeWidth = QFIXED_MAX, bool richText = false);
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String(const String &other);
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String(String &&other);
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String &operator=(const String &other);
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String &operator=(String &&other);
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int countWidth(int width) const;
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int countHeight(int width) const;
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void countLineWidths(int width, QVector<int> *lineWidths) const;
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void setText(const style::TextStyle &st, const QString &text, const TextParseOptions &options = _defaultOptions);
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void setRichText(const style::TextStyle &st, const QString &text, TextParseOptions options = _defaultOptions);
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void setMarkedText(const style::TextStyle &st, const TextWithEntities &textWithEntities, const TextParseOptions &options = _defaultOptions);
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void setLink(uint16 lnkIndex, const ClickHandlerPtr &lnk);
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bool hasLinks() const;
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bool hasSkipBlock() const;
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bool updateSkipBlock(int width, int height);
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bool removeSkipBlock();
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int32 maxWidth() const {
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return _maxWidth.ceil().toInt();
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}
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int32 minHeight() const {
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return _minHeight;
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}
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void draw(Painter &p, int32 left, int32 top, int32 width, style::align align = style::al_left, int32 yFrom = 0, int32 yTo = -1, TextSelection selection = { 0, 0 }, bool fullWidthSelection = true) const;
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void drawElided(Painter &p, int32 left, int32 top, int32 width, int32 lines = 1, style::align align = style::al_left, int32 yFrom = 0, int32 yTo = -1, int32 removeFromEnd = 0, bool breakEverywhere = false, TextSelection selection = { 0, 0 }) const;
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void drawLeft(Painter &p, int32 left, int32 top, int32 width, int32 outerw, style::align align = style::al_left, int32 yFrom = 0, int32 yTo = -1, TextSelection selection = { 0, 0 }) const {
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draw(p, rtl() ? (outerw - left - width) : left, top, width, align, yFrom, yTo, selection);
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}
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void drawLeftElided(Painter &p, int32 left, int32 top, int32 width, int32 outerw, int32 lines = 1, style::align align = style::al_left, int32 yFrom = 0, int32 yTo = -1, int32 removeFromEnd = 0, bool breakEverywhere = false, TextSelection selection = { 0, 0 }) const {
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drawElided(p, rtl() ? (outerw - left - width) : left, top, width, lines, align, yFrom, yTo, removeFromEnd, breakEverywhere, selection);
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}
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void drawRight(Painter &p, int32 right, int32 top, int32 width, int32 outerw, style::align align = style::al_left, int32 yFrom = 0, int32 yTo = -1, TextSelection selection = { 0, 0 }) const {
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draw(p, rtl() ? right : (outerw - right - width), top, width, align, yFrom, yTo, selection);
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}
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void drawRightElided(Painter &p, int32 right, int32 top, int32 width, int32 outerw, int32 lines = 1, style::align align = style::al_left, int32 yFrom = 0, int32 yTo = -1, int32 removeFromEnd = 0, bool breakEverywhere = false, TextSelection selection = { 0, 0 }) const {
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drawElided(p, rtl() ? right : (outerw - right - width), top, width, lines, align, yFrom, yTo, removeFromEnd, breakEverywhere, selection);
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}
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StateResult getState(QPoint point, int width, StateRequest request = StateRequest()) const;
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StateResult getStateLeft(QPoint point, int width, int outerw, StateRequest request = StateRequest()) const {
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return getState(rtlpoint(point, outerw), width, request);
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}
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StateResult getStateElided(QPoint point, int width, StateRequestElided request = StateRequestElided()) const;
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StateResult getStateElidedLeft(QPoint point, int width, int outerw, StateRequestElided request = StateRequestElided()) const {
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return getStateElided(rtlpoint(point, outerw), width, request);
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}
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[[nodiscard]] TextSelection adjustSelection(TextSelection selection, TextSelectType selectType) const;
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bool isFullSelection(TextSelection selection) const {
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return (selection.from == 0) && (selection.to >= _text.size());
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}
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bool isEmpty() const;
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bool isNull() const {
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return !_st;
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}
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int length() const {
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return _text.size();
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}
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QString toString(TextSelection selection = AllTextSelection) const;
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TextWithEntities toTextWithEntities(
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TextSelection selection = AllTextSelection) const;
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TextForMimeData toTextForMimeData(
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TextSelection selection = AllTextSelection) const;
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bool lastDots(int32 dots, int32 maxdots = 3) { // hack for typing animation
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if (_text.size() < maxdots) return false;
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int32 nowDots = 0, from = _text.size() - maxdots, to = _text.size();
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for (int32 i = from; i < to; ++i) {
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if (_text.at(i) == QChar('.')) {
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++nowDots;
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}
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}
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if (nowDots == dots) return false;
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for (int32 j = from; j < from + dots; ++j) {
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_text[j] = QChar('.');
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}
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for (int32 j = from + dots; j < to; ++j) {
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_text[j] = QChar(' ');
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}
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return true;
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}
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const style::TextStyle *style() const {
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return _st;
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}
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void clear();
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~String();
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private:
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using TextBlocks = std::vector<std::unique_ptr<AbstractBlock>>;
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using TextLinks = QVector<ClickHandlerPtr>;
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uint16 countBlockEnd(const TextBlocks::const_iterator &i, const TextBlocks::const_iterator &e) const;
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uint16 countBlockLength(const TextBlocks::const_iterator &i, const TextBlocks::const_iterator &e) const;
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// Template method for originalText(), originalTextWithEntities().
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template <typename AppendPartCallback, typename ClickHandlerStartCallback, typename ClickHandlerFinishCallback, typename FlagsChangeCallback>
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void enumerateText(TextSelection selection, AppendPartCallback appendPartCallback, ClickHandlerStartCallback clickHandlerStartCallback, ClickHandlerFinishCallback clickHandlerFinishCallback, FlagsChangeCallback flagsChangeCallback) const;
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// Template method for countWidth(), countHeight(), countLineWidths().
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// callback(lineWidth, lineHeight) will be called for all lines with:
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// QFixed lineWidth, int lineHeight
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template <typename Callback>
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void enumerateLines(int w, Callback callback) const;
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void recountNaturalSize(bool initial, Qt::LayoutDirection optionsDir = Qt::LayoutDirectionAuto);
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// clear() deletes all blocks and calls this method
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// it is also called from move constructor / assignment operator
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void clearFields();
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TextForMimeData toText(
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TextSelection selection,
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bool composeExpanded,
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bool composeEntities) const;
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QFixed _minResizeWidth;
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QFixed _maxWidth = 0;
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int32 _minHeight = 0;
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QString _text;
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const style::TextStyle *_st = nullptr;
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TextBlocks _blocks;
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TextLinks _links;
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Qt::LayoutDirection _startDir = Qt::LayoutDirectionAuto;
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friend class Parser;
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friend class Renderer;
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};
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} // namespace Text
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} // namespace Ui
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inline TextSelection snapSelection(int from, int to) {
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return { static_cast<uint16>(snap(from, 0, 0xFFFF)), static_cast<uint16>(snap(to, 0, 0xFFFF)) };
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}
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inline TextSelection shiftSelection(TextSelection selection, uint16 byLength) {
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return snapSelection(int(selection.from) + byLength, int(selection.to) + byLength);
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}
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inline TextSelection unshiftSelection(TextSelection selection, uint16 byLength) {
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return snapSelection(int(selection.from) - int(byLength), int(selection.to) - int(byLength));
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}
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inline TextSelection shiftSelection(TextSelection selection, const Ui::Text::String &byText) {
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return shiftSelection(selection, byText.length());
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}
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inline TextSelection unshiftSelection(TextSelection selection, const Ui::Text::String &byText) {
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return unshiftSelection(selection, byText.length());
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}
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// textcmd
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QString textcmdSkipBlock(ushort w, ushort h);
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QString textcmdStartLink(ushort lnkIndex);
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QString textcmdStartLink(const QString &url);
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QString textcmdStopLink();
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QString textcmdLink(ushort lnkIndex, const QString &text);
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QString textcmdLink(const QString &url, const QString &text);
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QString textcmdStartSemibold();
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QString textcmdStopSemibold();
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const QChar *textSkipCommand(const QChar *from, const QChar *end, bool canLink = true);
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inline bool chIsSpace(QChar ch, bool rich = false) {
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return ch.isSpace() || (ch < 32 && !(rich && ch == TextCommand)) || (ch == QChar::ParagraphSeparator) || (ch == QChar::LineSeparator) || (ch == QChar::ObjectReplacementCharacter) || (ch == QChar::CarriageReturn) || (ch == QChar::Tabulation) || (ch == QChar(8203)/*Zero width space.*/);
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}
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inline bool chIsDiac(QChar ch) { // diac and variation selectors
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return (ch.category() == QChar::Mark_NonSpacing) || (ch == 1652) || (ch >= 64606 && ch <= 64611);
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}
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bool chIsBad(QChar ch);
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inline bool chIsTrimmed(QChar ch, bool rich = false) {
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return (!rich || ch != TextCommand) && (chIsSpace(ch) || chIsBad(ch));
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}
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inline bool chReplacedBySpace(QChar ch) {
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// \xe2\x80[\xa8 - \xac\xad] // 8232 - 8237
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// QString from1 = QString::fromUtf8("\xe2\x80\xa8"), to1 = QString::fromUtf8("\xe2\x80\xad");
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// \xcc[\xb3\xbf\x8a] // 819, 831, 778
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// QString bad1 = QString::fromUtf8("\xcc\xb3"), bad2 = QString::fromUtf8("\xcc\xbf"), bad3 = QString::fromUtf8("\xcc\x8a");
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// [\x00\x01\x02\x07\x08\x0b-\x1f] // '\t' = 0x09
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return (/*code >= 0x00 && */ch <= 0x02) || (ch >= 0x07 && ch <= 0x09) || (ch >= 0x0b && ch <= 0x1f) ||
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(ch == 819) || (ch == 831) || (ch == 778) || (ch >= 8232 && ch <= 8237);
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}
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inline int32 chMaxDiacAfterSymbol() {
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return 2;
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}
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inline bool chIsNewline(QChar ch) {
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return (ch == QChar::LineFeed || ch == 156);
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}
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inline bool chIsLinkEnd(QChar ch) {
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return ch == TextCommand || chIsBad(ch) || chIsSpace(ch) || chIsNewline(ch) || ch.isLowSurrogate() || ch.isHighSurrogate();
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}
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inline bool chIsAlmostLinkEnd(QChar ch) {
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switch (ch.unicode()) {
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case '?':
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case ',':
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case '.':
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case '"':
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case ':':
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case '!':
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case '\'':
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return true;
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default:
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break;
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}
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return false;
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}
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inline bool chIsWordSeparator(QChar ch) {
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switch (ch.unicode()) {
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case QChar::Space:
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case QChar::LineFeed:
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case '.':
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case ',':
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case '?':
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case '!':
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case '@':
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case '#':
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case '$':
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case ':':
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case ';':
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case '-':
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case '<':
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case '>':
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case '[':
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case ']':
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case '(':
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case ')':
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case '{':
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case '}':
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case '=':
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case '/':
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case '+':
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case '%':
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case '&':
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case '^':
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case '*':
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case '\'':
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case '"':
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case '`':
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case '~':
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case '|':
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return true;
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default:
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break;
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}
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return false;
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}
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inline bool chIsSentenceEnd(QChar ch) {
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switch (ch.unicode()) {
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case '.':
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case '?':
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case '!':
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return true;
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default:
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break;
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}
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return false;
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}
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inline bool chIsSentencePartEnd(QChar ch) {
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switch (ch.unicode()) {
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case ',':
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case ':':
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case ';':
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return true;
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default:
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break;
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}
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return false;
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}
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inline bool chIsParagraphSeparator(QChar ch) {
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switch (ch.unicode()) {
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case QChar::LineFeed:
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return true;
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default:
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break;
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}
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return false;
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}
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