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Optimize Ui::Text::String blocks vector.

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This commit is contained in:
John Preston 2020-06-03 15:27:18 +04:00
parent 30d223befe
commit f7b4994887
4 changed files with 360 additions and 167 deletions
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114
ui/text/text.cpp
View file

@ -461,13 +461,13 @@ void Parser::createBlock(int32 skipBack) {
}
_lastSkipped = false;
if (_emoji) {
_t->_blocks.push_back(std::make_unique<EmojiBlock>(_t->_st->font, _t->_text, _blockStart, len, _flags, _lnkIndex, _emoji));
_t->_blocks.push_back(Block::Emoji(_t->_st->font, _t->_text, _blockStart, len, _flags, _lnkIndex, _emoji));
_emoji = nullptr;
_lastSkipped = true;
} else if (newline) {
_t->_blocks.push_back(std::make_unique<NewlineBlock>(_t->_st->font, _t->_text, _blockStart, len, _flags, _lnkIndex));
_t->_blocks.push_back(Block::Newline(_t->_st->font, _t->_text, _blockStart, len, _flags, _lnkIndex));
} else {
_t->_blocks.push_back(std::make_unique<TextBlock>(_t->_st->font, _t->_text, _t->_minResizeWidth, _blockStart, len, _flags, _lnkIndex));
_t->_blocks.push_back(Block::Text(_t->_st->font, _t->_text, _t->_minResizeWidth, _blockStart, len, _flags, _lnkIndex));
}
_blockStart += len;
blockCreated();
@ -477,7 +477,7 @@ void Parser::createBlock(int32 skipBack) {
void Parser::createSkipBlock(int32 w, int32 h) {
createBlock();
_t->_text.push_back('_');
_t->_blocks.push_back(std::make_unique<SkipBlock>(_t->_st->font, _t->_text, _blockStart++, w, h, _lnkIndex));
_t->_blocks.push_back(Block::Skip(_t->_st->font, _t->_text, _blockStart++, w, h, _lnkIndex));
blockCreated();
}
@ -913,15 +913,14 @@ void Parser::checkForElidedSkipBlock() {
void Parser::finalize(const TextParseOptions &options) {
_t->_links.resize(_maxLnkIndex);
for (const auto &block : _t->_blocks) {
const auto b = block.get();
const auto shiftedIndex = b->lnkIndex();
for (auto &block : _t->_blocks) {
const auto shiftedIndex = block->lnkIndex();
if (shiftedIndex <= kStringLinkIndexShift) {
continue;
}
const auto realIndex = (shiftedIndex - kStringLinkIndexShift);
const auto index = _maxLnkIndex + realIndex;
b->setLnkIndex(index);
block->setLnkIndex(index);
if (_t->_links.size() >= index) {
continue;
}
@ -1165,7 +1164,7 @@ public:
_wLeft -= _elideRemoveFromEnd;
}
_parDirection = static_cast<NewlineBlock*>(b)->nextDirection();
_parDirection = static_cast<const NewlineBlock*>(b)->nextDirection();
if (_parDirection == Qt::LayoutDirectionAuto) _parDirection = style::LayoutDirection();
initNextParagraph(i + 1);
@ -1187,7 +1186,7 @@ public:
}
if (_btype == TextBlockTText) {
auto t = static_cast<TextBlock*>(b);
auto t = static_cast<const TextBlock*>(b);
if (t->_words.isEmpty()) { // no words in this block, spaces only => layout this block in the same line
_last_rPadding += b->f_rpadding();
@ -1678,7 +1677,7 @@ private:
}
Emoji::Draw(
*_p,
static_cast<EmojiBlock*>(currentBlock)->emoji,
static_cast<const EmojiBlock*>(currentBlock)->_emoji,
Emoji::GetSizeNormal(),
(glyphX + st::emojiPadding).toInt(),
_y + _yDelta + emojiY);
@ -1847,7 +1846,7 @@ private:
_p->fillRect(left, _y + _yDelta, width, _fontHeight, _textPalette->selectBg);
}
void elideSaveBlock(int32 blockIndex, AbstractBlock *&_endBlock, int32 elideStart, int32 elideWidth) {
void elideSaveBlock(int32 blockIndex, const AbstractBlock *&_endBlock, int32 elideStart, int32 elideWidth) {
if (_elideSavedBlock) {
restoreAfterElided();
}
@ -1855,7 +1854,7 @@ private:
_elideSavedIndex = blockIndex;
auto mutableText = const_cast<String*>(_t);
_elideSavedBlock = std::move(mutableText->_blocks[blockIndex]);
mutableText->_blocks[blockIndex] = std::make_unique<TextBlock>(_t->_st->font, _t->_text, QFIXED_MAX, elideStart, 0, _elideSavedBlock->flags(), _elideSavedBlock->lnkIndex());
mutableText->_blocks[blockIndex] = Block::Text(_t->_st->font, _t->_text, QFIXED_MAX, elideStart, 0, (*_elideSavedBlock)->flags(), (*_elideSavedBlock)->lnkIndex());
_blocksSize = blockIndex + 1;
_endBlock = (blockIndex + 1 < _t->_blocks.size() ? _t->_blocks[blockIndex + 1].get() : nullptr);
}
@ -1870,7 +1869,7 @@ private:
}
}
void prepareElidedLine(QString &lineText, int32 lineStart, int32 &lineLength, AbstractBlock *&_endBlock, int repeat = 0) {
void prepareElidedLine(QString &lineText, int32 lineStart, int32 &lineLength, const AbstractBlock *&_endBlock, int repeat = 0) {
static const auto _Elide = QString::fromLatin1("...");
_f = _t->_st->font;
@ -1980,7 +1979,7 @@ private:
void restoreAfterElided() {
if (_elideSavedBlock) {
const_cast<String*>(_t)->_blocks[_elideSavedIndex] = std::move(_elideSavedBlock);
const_cast<String*>(_t)->_blocks[_elideSavedIndex] = std::move(*_elideSavedBlock);
}
}
@ -2034,7 +2033,7 @@ private:
return result;
}
void eSetFont(AbstractBlock *block) {
void eSetFont(const AbstractBlock *block) {
const auto flags = block->flags();
const auto usedFont = [&] {
if (const auto index = block->lnkIndex()) {
@ -2609,7 +2608,7 @@ private:
}
private:
void applyBlockProperties(AbstractBlock *block) {
void applyBlockProperties(const AbstractBlock *block) {
eSetFont(block);
if (_p) {
if (block->lnkIndex()) {
@ -2660,7 +2659,7 @@ private:
// elided hack support
int _blocksSize = 0;
int _elideSavedIndex = 0;
std::unique_ptr<AbstractBlock> _elideSavedBlock;
std::optional<Block> _elideSavedBlock;
int _lineStart = 0;
int _localFrom = 0;
@ -2679,7 +2678,8 @@ private:
String::String(int32 minResizeWidth) : _minResizeWidth(minResizeWidth) {
}
String::String(const style::TextStyle &st, const QString &text, const TextParseOptions &options, int32 minResizeWidth, bool richText) : _minResizeWidth(minResizeWidth) {
String::String(const style::TextStyle &st, const QString &text, const TextParseOptions &options, int32 minResizeWidth, bool richText)
: _minResizeWidth(minResizeWidth) {
if (richText) {
setRichText(st, text, options);
} else {
@ -2687,60 +2687,6 @@ String::String(const style::TextStyle &st, const QString &text, const TextParseO
}
}
String::String(const String &other)
: _minResizeWidth(other._minResizeWidth)
, _maxWidth(other._maxWidth)
, _minHeight(other._minHeight)
, _text(other._text)
, _st(other._st)
, _links(other._links)
, _startDir(other._startDir) {
_blocks.reserve(other._blocks.size());
for (auto &block : other._blocks) {
_blocks.push_back(block->clone());
}
}
String::String(String &&other)
: _minResizeWidth(other._minResizeWidth)
, _maxWidth(other._maxWidth)
, _minHeight(other._minHeight)
, _text(other._text)
, _st(other._st)
, _blocks(std::move(other._blocks))
, _links(other._links)
, _startDir(other._startDir) {
other.clearFields();
}
String &String::operator=(const String &other) {
_minResizeWidth = other._minResizeWidth;
_maxWidth = other._maxWidth;
_minHeight = other._minHeight;
_text = other._text;
_st = other._st;
_blocks = TextBlocks(other._blocks.size());
_links = other._links;
_startDir = other._startDir;
for (int32 i = 0, l = _blocks.size(); i < l; ++i) {
_blocks[i] = other._blocks.at(i)->clone();
}
return *this;
}
String &String::operator=(String &&other) {
_minResizeWidth = other._minResizeWidth;
_maxWidth = other._maxWidth;
_minHeight = other._minHeight;
_text = other._text;
_st = other._st;
_blocks = std::move(other._blocks);
_links = other._links;
_startDir = other._startDir;
other.clearFields();
return *this;
}
void String::setText(const style::TextStyle &st, const QString &text, const TextParseOptions &options) {
_st = &st;
clear();
@ -2757,8 +2703,8 @@ void String::recountNaturalSize(bool initial, Qt::LayoutDirection optionsDir) {
int32 lineHeight = 0;
int32 lastNewlineStart = 0;
QFixed _width = 0, last_rBearing = 0, last_rPadding = 0;
for (auto i = _blocks.cbegin(), e = _blocks.cend(); i != e; ++i) {
auto b = i->get();
for (auto &block : _blocks) {
auto b = block.get();
auto _btype = b->type();
auto blockHeight = countBlockHeight(b, _st);
if (_btype == TextBlockTNewline) {
@ -2775,7 +2721,7 @@ void String::recountNaturalSize(bool initial, Qt::LayoutDirection optionsDir) {
}
}
lastNewlineStart = b->from();
lastNewline = static_cast<NewlineBlock*>(b);
lastNewline = &block.unsafe<NewlineBlock>();
_minHeight += lineHeight;
lineHeight = 0;
@ -2824,19 +2770,19 @@ void String::recountNaturalSize(bool initial, Qt::LayoutDirection optionsDir) {
}
int String::countMaxMonospaceWidth() const {
NewlineBlock *lastNewline = 0;
const NewlineBlock *lastNewline = nullptr;
auto result = QFixed();
auto paragraphWidth = QFixed();
auto lastNewlineStart = 0;
auto fullMonospace = true;
QFixed _width = 0, last_rBearing = 0, last_rPadding = 0;
for (auto i = _blocks.cbegin(), e = _blocks.cend(); i != e; ++i) {
auto b = i->get();
for (auto &block : _blocks) {
auto b = block.get();
auto _btype = b->type();
if (_btype == TextBlockTNewline) {
lastNewlineStart = b->from();
lastNewline = static_cast<NewlineBlock*>(b);
lastNewline = &block.unsafe<NewlineBlock>();
last_rBearing = b->f_rbearing();
last_rPadding = b->f_rpadding();
@ -2943,7 +2889,7 @@ bool String::updateSkipBlock(int width, int height) {
_blocks.pop_back();
}
_text.push_back('_');
_blocks.push_back(std::make_unique<SkipBlock>(
_blocks.push_back(Block::Skip(
_st->font,
_text,
_text.size() - 1,
@ -3036,7 +2982,7 @@ void String::enumerateLines(
}
if (_btype == TextBlockTText) {
auto t = static_cast<TextBlock*>(b.get());
const auto t = &b.unsafe<TextBlock>();
if (t->_words.isEmpty()) { // no words in this block, spaces only => layout this block in the same line
last_rPadding += b->f_rpadding();
@ -3389,7 +3335,7 @@ IsolatedEmoji String::toIsolatedEmoji() const {
if (block->lnkIndex()) {
return IsolatedEmoji();
} else if (type == TextBlockTEmoji) {
result.items[index++] = static_cast<EmojiBlock*>(block.get())->emoji;
result.items[index++] = block.unsafe<EmojiBlock>()._emoji;
} else if (type != TextBlockTSkip) {
return IsolatedEmoji();
}
@ -3409,7 +3355,5 @@ void String::clearFields() {
_startDir = Qt::LayoutDirectionAuto;
}
String::~String() = default;
} // namespace Text
} // namespace Ui

40
ui/text/text.h
View file

@ -7,6 +7,7 @@
#pragma once
#include "ui/text/text_entity.h"
#include "ui/text/text_block.h"
#include "ui/painter.h"
#include "ui/click_handler.h"
#include "base/flags.h"
@ -69,7 +70,6 @@ static constexpr TextSelection AllTextSelection = { 0, 0xFFFF };
namespace Ui {
namespace Text {
class AbstractBlock;
struct IsolatedEmoji;
struct StateRequest {
@ -108,11 +108,17 @@ struct StateRequestElided : public StateRequest {
class String {
public:
String(int32 minResizeWidth = QFIXED_MAX);
String(const style::TextStyle &st, const QString &text, const TextParseOptions &options = _defaultOptions, int32 minResizeWidth = QFIXED_MAX, bool richText = false);
String(const String &other);
String(String &&other);
String &operator=(const String &other);
String &operator=(String &&other);
String(
const style::TextStyle &st,
const QString &text,
const TextParseOptions &options = _defaultOptions,
int32 minResizeWidth = QFIXED_MAX,
bool richText = false);
String(const String &other) = default;
String(String &&other) = default;
String &operator=(const String &other) = default;
String &operator=(String &&other) = default;
~String() = default;
int countWidth(int width, bool breakEverywhere = false) const;
int countHeight(int width, bool breakEverywhere = false) const;
@ -168,34 +174,14 @@ public:
TextSelection selection = AllTextSelection) const;
IsolatedEmoji toIsolatedEmoji() const;
bool lastDots(int32 dots, int32 maxdots = 3) { // hack for typing animation
if (_text.size() < maxdots) return false;
int32 nowDots = 0, from = _text.size() - maxdots, to = _text.size();
for (int32 i = from; i < to; ++i) {
if (_text.at(i) == QChar('.')) {
++nowDots;
}
}
if (nowDots == dots) return false;
for (int32 j = from; j < from + dots; ++j) {
_text[j] = QChar('.');
}
for (int32 j = from + dots; j < to; ++j) {
_text[j] = QChar(' ');
}
return true;
}
const style::TextStyle *style() const {
return _st;
}
void clear();
~String();
private:
using TextBlocks = std::vector<std::unique_ptr<AbstractBlock>>;
using TextBlocks = QVector<Block>;
using TextLinks = QVector<ClickHandlerPtr>;
uint16 countBlockEnd(const TextBlocks::const_iterator &i, const TextBlocks::const_iterator &e) const;

32
ui/text/text_block.cpp
View file

@ -310,10 +310,20 @@ private:
};
QFixed AbstractBlock::f_rbearing() const {
return (type() == TextBlockTText) ? static_cast<const TextBlock*>(this)->real_f_rbearing() : 0;
return (type() == TextBlockTText)
? static_cast<const TextBlock*>(this)->real_f_rbearing()
: 0;
}
TextBlock::TextBlock(const style::font &font, const QString &str, QFixed minResizeWidth, uint16 from, uint16 length, uchar flags, uint16 lnkIndex) : AbstractBlock(font, str, from, length, flags, lnkIndex) {
TextBlock::TextBlock(
const style::font &font,
const QString &str,
QFixed minResizeWidth,
uint16 from,
uint16 length,
uchar flags,
uint16 lnkIndex)
: AbstractBlock(font, str, from, length, flags, lnkIndex) {
_flags |= ((TextBlockTText & 0x0F) << 8);
if (length) {
style::font blockFont = font;
@ -347,11 +357,18 @@ TextBlock::TextBlock(const style::font &font, const QString &str, QFixed minResi
}
}
EmojiBlock::EmojiBlock(const style::font &font, const QString &str, uint16 from, uint16 length, uchar flags, uint16 lnkIndex, EmojiPtr emoji) : AbstractBlock(font, str, from, length, flags, lnkIndex)
, emoji(emoji) {
EmojiBlock::EmojiBlock(
const style::font &font,
const QString &str,
uint16 from,
uint16 length,
uchar flags,
uint16 lnkIndex,
EmojiPtr emoji)
: AbstractBlock(font, str, from, length, flags, lnkIndex)
, _emoji(emoji) {
_flags |= ((TextBlockTEmoji & 0x0F) << 8);
_width = int(st::emojiSize + 2 * st::emojiPadding);
_rpadding = 0;
for (auto i = length; i != 0;) {
auto ch = str[_from + (--i)];
@ -363,10 +380,5 @@ EmojiBlock::EmojiBlock(const style::font &font, const QString &str, uint16 from,
}
}
SkipBlock::SkipBlock(const style::font &font, const QString &str, uint16 from, int32 w, int32 h, uint16 lnkIndex) : AbstractBlock(font, str, from, 1, 0, lnkIndex), _height(h) {
_flags |= ((TextBlockTSkip & 0x0F) << 8);
_width = w;
}
} // namespace Text
} // namespace Ui

341
ui/text/text_block.h
View file

@ -34,16 +34,13 @@ enum TextBlockFlags {
class AbstractBlock {
public:
AbstractBlock(const style::font &font, const QString &str, uint16 from, uint16 length, uchar flags, uint16 lnkIndex) : _from(from), _flags((flags & 0xFF) | ((lnkIndex & 0xFFFF) << 12)) {
}
uint16 from() const {
return _from;
}
int32 width() const {
int width() const {
return _width.toInt();
}
int32 rpadding() const {
int rpadding() const {
return _rpadding.toInt();
}
QFixed f_width() const {
@ -70,11 +67,18 @@ public:
return (_flags & 0xFF);
}
virtual std::unique_ptr<AbstractBlock> clone() const = 0;
virtual ~AbstractBlock() {
protected:
AbstractBlock(
const style::font &font,
const QString &str,
uint16 from,
uint16 length,
uchar flags,
uint16 lnkIndex)
: _from(from)
, _flags((flags & 0xFF) | ((lnkIndex & 0xFFFF) << 12)) {
}
protected:
uint16 _from = 0;
uint32 _flags = 0; // 4 bits empty, 16 bits lnkIndex, 4 bits type, 8 bits flags
@ -90,9 +94,16 @@ protected:
};
class NewlineBlock : public AbstractBlock {
class NewlineBlock final : public AbstractBlock {
public:
NewlineBlock(const style::font &font, const QString &str, uint16 from, uint16 length, uchar flags, uint16 lnkIndex) : AbstractBlock(font, str, from, length, flags, lnkIndex), _nextDir(Qt::LayoutDirectionAuto) {
NewlineBlock(
const style::font &font,
const QString &str,
uint16 from,
uint16 length,
uchar flags,
uint16 lnkIndex)
: AbstractBlock(font, str, from, length, flags, lnkIndex) {
_flags |= ((TextBlockTNewline & 0x0F) << 8);
}
@ -100,12 +111,8 @@ public:
return _nextDir;
}
std::unique_ptr<AbstractBlock> clone() const override {
return std::make_unique<NewlineBlock>(*this);
}
private:
Qt::LayoutDirection _nextDir;
Qt::LayoutDirection _nextDir = Qt::LayoutDirectionAuto;
friend class String;
friend class Parser;
@ -113,14 +120,16 @@ private:
};
class TextWord {
class TextWord final {
public:
TextWord() = default;
TextWord(uint16 from, QFixed width, QFixed rbearing, QFixed rpadding = 0)
: _from(from)
, _width(width)
, _rpadding(rpadding)
, _rbearing(rbearing.value() > 0x7FFF ? 0x7FFF : (rbearing.value() < -0x7FFF ? -0x7FFF : rbearing.value())) {
: _from(from)
, _rbearing((rbearing.value() > 0x7FFF)
? 0x7FFF
: (rbearing.value() < -0x7FFF ? -0x7FFF : rbearing.value()))
, _width(width)
, _rpadding(rpadding) {
}
uint16 from() const {
return _from;
@ -140,45 +149,50 @@ public:
private:
uint16 _from = 0;
QFixed _width, _rpadding;
int16 _rbearing = 0;
QFixed _width, _rpadding;
};
class TextBlock : public AbstractBlock {
class TextBlock final : public AbstractBlock {
public:
TextBlock(const style::font &font, const QString &str, QFixed minResizeWidth, uint16 from, uint16 length, uchar flags, uint16 lnkIndex);
std::unique_ptr<AbstractBlock> clone() const override {
return std::make_unique<TextBlock>(*this);
}
TextBlock(
const style::font &font,
const QString &str,
QFixed minResizeWidth,
uint16 from,
uint16 length,
uchar flags,
uint16 lnkIndex);
private:
friend class AbstractBlock;
QFixed real_f_rbearing() const {
return _words.isEmpty() ? 0 : _words.back().f_rbearing();
}
using TextWords = QVector<TextWord>;
TextWords _words;
QVector<TextWord> _words;
friend class String;
friend class Parser;
friend class Renderer;
friend class BlockParser;
friend class AbstractBlock;
};
class EmojiBlock : public AbstractBlock {
class EmojiBlock final : public AbstractBlock {
public:
EmojiBlock(const style::font &font, const QString &str, uint16 from, uint16 length, uchar flags, uint16 lnkIndex, EmojiPtr emoji);
std::unique_ptr<AbstractBlock> clone() const override {
return std::make_unique<EmojiBlock>(*this);
}
EmojiBlock(
const style::font &font,
const QString &str,
uint16 from,
uint16 length,
uchar flags,
uint16 lnkIndex,
EmojiPtr emoji);
private:
EmojiPtr emoji = nullptr;
EmojiPtr _emoji = nullptr;
friend class String;
friend class Parser;
@ -186,20 +200,27 @@ private:
};
class SkipBlock : public AbstractBlock {
class SkipBlock final : public AbstractBlock {
public:
SkipBlock(const style::font &font, const QString &str, uint16 from, int32 w, int32 h, uint16 lnkIndex);
SkipBlock(
const style::font &font,
const QString &str,
uint16 from,
int32 w,
int32 h,
uint16 lnkIndex)
: AbstractBlock(font, str, from, 1, 0, lnkIndex)
, _height(h) {
_flags |= ((TextBlockTSkip & 0x0F) << 8);
_width = w;
}
int32 height() const {
int height() const {
return _height;
}
std::unique_ptr<AbstractBlock> clone() const override {
return std::make_unique<SkipBlock>(*this);
}
private:
int32 _height;
int _height = 0;
friend class String;
friend class Parser;
@ -207,5 +228,235 @@ private:
};
class Block final {
public:
Block() {
Unexpected("Should not be called.");
}
Block(const Block &other) {
switch (other->type()) {
case TextBlockTNewline:
emplace<NewlineBlock>(other.unsafe<NewlineBlock>());
break;
case TextBlockTText:
emplace<TextBlock>(other.unsafe<TextBlock>());
break;
case TextBlockTEmoji:
emplace<EmojiBlock>(other.unsafe<EmojiBlock>());
break;
case TextBlockTSkip:
emplace<SkipBlock>(other.unsafe<SkipBlock>());
break;
default:
Unexpected("Bad text block type in Block(const Block&).");
}
}
Block(Block &&other) {
switch (other->type()) {
case TextBlockTNewline:
emplace<NewlineBlock>(std::move(other.unsafe<NewlineBlock>()));
break;
case TextBlockTText:
emplace<TextBlock>(std::move(other.unsafe<TextBlock>()));
break;
case TextBlockTEmoji:
emplace<EmojiBlock>(std::move(other.unsafe<EmojiBlock>()));
break;
case TextBlockTSkip:
emplace<SkipBlock>(std::move(other.unsafe<SkipBlock>()));
break;
default:
Unexpected("Bad text block type in Block(Block&&).");
}
}
Block &operator=(const Block &other) {
if (&other == this) {
return *this;
}
destroy();
switch (other->type()) {
case TextBlockTNewline:
emplace<NewlineBlock>(other.unsafe<NewlineBlock>());
break;
case TextBlockTText:
emplace<TextBlock>(other.unsafe<TextBlock>());
break;
case TextBlockTEmoji:
emplace<EmojiBlock>(other.unsafe<EmojiBlock>());
break;
case TextBlockTSkip:
emplace<SkipBlock>(other.unsafe<SkipBlock>());
break;
default:
Unexpected("Bad text block type in operator=(const Block&).");
}
return *this;
}
Block &operator=(Block &&other) {
if (&other == this) {
return *this;
}
destroy();
switch (other->type()) {
case TextBlockTNewline:
emplace<NewlineBlock>(std::move(other.unsafe<NewlineBlock>()));
break;
case TextBlockTText:
emplace<TextBlock>(std::move(other.unsafe<TextBlock>()));
break;
case TextBlockTEmoji:
emplace<EmojiBlock>(std::move(other.unsafe<EmojiBlock>()));
break;
case TextBlockTSkip:
emplace<SkipBlock>(std::move(other.unsafe<SkipBlock>()));
break;
default:
Unexpected("Bad text block type in operator=(Block&&).");
}
return *this;
}
~Block() {
destroy();
}
[[nodiscard]] static Block Newline(
const style::font &font,
const QString &str,
uint16 from,
uint16 length,
uchar flags,
uint16 lnkIndex) {
return New<NewlineBlock>(font, str, from, length, flags, lnkIndex);
}
[[nodiscard]] static Block Text(
const style::font &font,
const QString &str,
QFixed minResizeWidth,
uint16 from,
uint16 length,
uchar flags,
uint16 lnkIndex) {
return New<TextBlock>(
font,
str,
minResizeWidth,
from,
length,
flags,
lnkIndex);
}
[[nodiscard]] static Block Emoji(
const style::font &font,
const QString &str,
uint16 from,
uint16 length,
uchar flags,
uint16 lnkIndex,
EmojiPtr emoji) {
return New<EmojiBlock>(
font,
str,
from,
length,
flags,
lnkIndex,
emoji);
}
[[nodiscard]] static Block Skip(
const style::font &font,
const QString &str,
uint16 from,
int32 w,
int32 h,
uint16 lnkIndex) {
return New<SkipBlock>(font, str, from, w, h, lnkIndex);
}
template <typename FinalBlock>
[[nodiscard]] FinalBlock &unsafe() {
return *reinterpret_cast<FinalBlock*>(&_data);
}
template <typename FinalBlock>
[[nodiscard]] const FinalBlock &unsafe() const {
return *reinterpret_cast<const FinalBlock*>(&_data);
}
[[nodiscard]] AbstractBlock *get() {
return &unsafe<AbstractBlock>();
}
[[nodiscard]] const AbstractBlock *get() const {
return &unsafe<AbstractBlock>();
}
[[nodiscard]] AbstractBlock *operator->() {
return get();
}
[[nodiscard]] const AbstractBlock *operator->() const {
return get();
}
[[nodiscard]] AbstractBlock &operator*() {
return *get();
}
[[nodiscard]] const AbstractBlock &operator*() const {
return *get();
}
private:
struct Tag {
};
explicit Block(const Tag &) {
}
template <typename FinalType, typename ...Args>
[[nodiscard]] static Block New(Args &&...args) {
auto result = Block(Tag{});
result.emplace<FinalType>(std::forward<Args>(args)...);
return result;
}
template <typename FinalType, typename ...Args>
void emplace(Args &&...args) {
new (&_data) FinalType(std::forward<Args>(args)...);
}
void destroy() {
switch (get()->type()) {
case TextBlockTNewline:
unsafe<NewlineBlock>().~NewlineBlock();
break;
case TextBlockTText:
unsafe<TextBlock>().~TextBlock();
break;
case TextBlockTEmoji:
unsafe<EmojiBlock>().~EmojiBlock();
break;
case TextBlockTSkip:
unsafe<SkipBlock>().~SkipBlock();
break;
default:
Unexpected("Bad text block type in Block(Block&&).");
}
}
static_assert(sizeof(NewlineBlock) <= sizeof(TextBlock));
static_assert(alignof(NewlineBlock) <= alignof(AbstractBlock));
static_assert(sizeof(EmojiBlock) <= sizeof(TextBlock));
static_assert(alignof(EmojiBlock) <= alignof(AbstractBlock));
static_assert(sizeof(SkipBlock) <= sizeof(TextBlock));
static_assert(alignof(SkipBlock) <= alignof(AbstractBlock));
std::aligned_storage_t<sizeof(TextBlock), alignof(AbstractBlock)> _data;
};
} // namespace Text
} // namespace Ui