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VTextDocumentLayout: hold layout info in block data

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This commit is contained in:
Le Tan 2018-08-07 20:59:46 +08:00
parent efd3740198
commit 77954a7d64
6 changed files with 388 additions and 372 deletions
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19
src/pegmarkdownhighlighter.cpp
View File

@ -488,21 +488,16 @@ void PegMarkdownHighlighter::clearBlockUserData(const QSharedPointer<PegHighligh
Q_UNUSED(p_result);
int blockNum = p_block.blockNumber();
VTextBlockData *data = VTextBlockData::blockData(p_block);
if (!data) {
return;
}
VTextBlockData *blockData = static_cast<VTextBlockData *>(p_block.userData());
if (!blockData) {
blockData = new VTextBlockData();
p_block.setUserData(blockData);
data->setCodeBlockIndentation(-1);
if (data->getPreviews().isEmpty()) {
m_possiblePreviewBlocks.remove(blockNum);
} else {
blockData->setCodeBlockIndentation(-1);
if (blockData->getPreviews().isEmpty()) {
m_possiblePreviewBlocks.remove(blockNum);
} else {
m_possiblePreviewBlocks.insert(blockNum);
}
m_possiblePreviewBlocks.insert(blockNum);
}
}

3
src/src.pro
View File

@ -281,7 +281,8 @@ HEADERS += vmainwindow.h \
pegmarkdownhighlighter.h \
pegparser.h \
peghighlighterresult.h \
vtexteditcompleter.h
vtexteditcompleter.h \
vtextdocumentlayoutdata.h
RESOURCES += \
vnote.qrc \

32
src/vtextblockdata.h
View File

@ -7,6 +7,7 @@
#include "vconstants.h"
#include "markdownhighlighterdata.h"
#include "vtextdocumentlayoutdata.h"
// Sources of the preview.
enum class PreviewSource
@ -191,6 +192,10 @@ public:
void setCacheValid(bool p_valid);
static VTextBlockData *blockData(const QTextBlock &p_block);
static BlockLayoutInfo *layoutInfo(const QTextBlock &p_block);
private:
// Check the order of elements.
bool checkOrder() const;
@ -215,6 +220,8 @@ private:
// Indentation of the this code block if this block is a fenced code block.
int m_codeBlockIndentation;
BlockLayoutInfo m_layoutInfo;
};
inline const QVector<VPreviewInfo *> &VTextBlockData::getPreviews() const
@ -317,4 +324,29 @@ inline void VTextBlockData::setCacheValid(bool p_valid)
{
m_cacheValid = p_valid;
}
inline VTextBlockData *VTextBlockData::blockData(const QTextBlock &p_block)
{
if (!p_block.isValid()) {
return NULL;
}
VTextBlockData *data = static_cast<VTextBlockData *>(p_block.userData());
if (!data) {
data = new VTextBlockData();
const_cast<QTextBlock &>(p_block).setUserData(data);
}
return data;
}
inline BlockLayoutInfo *VTextBlockData::layoutInfo(const QTextBlock &p_block)
{
VTextBlockData *data = blockData(p_block);
if (data) {
return &data->m_layoutInfo;
} else {
return NULL;
}
}
#endif // VTEXTBLOCKDATA_H

488
src/vtextdocumentlayout.cpp
View File

@ -16,6 +16,11 @@
#define MARKER_THICKNESS 2
#define MAX_INLINE_IMAGE_HEIGHT 400
inline static bool realEqual(qreal p_a, qreal p_b)
{
return std::abs(p_a - p_b) < 1e-8;
}
VTextDocumentLayout::VTextDocumentLayout(QTextDocument *p_doc,
VImageResourceManager2 *p_imageMgr)
: QAbstractTextDocumentLayout(p_doc),
@ -69,26 +74,20 @@ void VTextDocumentLayout::blockRangeFromRect(const QRectF &p_rect,
{
if (p_rect.isNull()) {
p_first = 0;
p_last = m_blocks.size() - 1;
return;
}
if (document()->blockCount() != m_blocks.size()) {
p_first = -1;
p_last = -1;
p_last = document()->blockCount() - 1;
return;
}
p_first = -1;
p_last = m_blocks.size() - 1;
p_last = document()->blockCount() - 1;
int y = p_rect.y();
QTextBlock block = document()->firstBlock();
while (block.isValid()) {
const BlockInfo &info = m_blocks[block.blockNumber()];
Q_ASSERT(info.hasOffset());
const BlockLayoutInfo *info = VTextBlockData::layoutInfo(block);
Q_ASSERT(info->hasOffset());
if (info.top() == y
|| (info.top() < y && info.bottom() >= y)) {
if (info->top() == y
|| (info->top() < y && info->bottom() >= y)) {
p_first = block.blockNumber();
break;
}
@ -103,10 +102,10 @@ void VTextDocumentLayout::blockRangeFromRect(const QRectF &p_rect,
y += p_rect.height();
while (block.isValid()) {
const BlockInfo &info = m_blocks[block.blockNumber()];
Q_ASSERT(info.hasOffset());
const BlockLayoutInfo *info = VTextBlockData::layoutInfo(block);
Q_ASSERT(info->hasOffset());
if (info.bottom() > y) {
if (info->bottom() > y) {
p_last = block.blockNumber();
break;
}
@ -121,16 +120,11 @@ void VTextDocumentLayout::blockRangeFromRectBS(const QRectF &p_rect,
{
if (p_rect.isNull()) {
p_first = 0;
p_last = m_blocks.size() - 1;
p_last = document()->blockCount() - 1;
return;
}
if (document()->blockCount() != m_blocks.size()) {
p_first = -1;
} else {
p_first = findBlockByPosition(p_rect.topLeft());
}
p_first = findBlockByPosition(p_rect.topLeft());
if (p_first == -1) {
p_last = -1;
return;
@ -138,18 +132,17 @@ void VTextDocumentLayout::blockRangeFromRectBS(const QRectF &p_rect,
int y = p_rect.bottom();
QTextBlock block = document()->findBlockByNumber(p_first);
if (m_blocks[p_first].top() == p_rect.top()
&& p_first > 0) {
const BlockLayoutInfo *info = VTextBlockData::layoutInfo(block);
if (realEqual(info->top(), p_rect.top()) && p_first > 0) {
--p_first;
}
p_last = m_blocks.size() - 1;
p_last = document()->blockCount() - 1;
while (block.isValid()) {
const BlockInfo &info = m_blocks[block.blockNumber()];
Q_ASSERT(info.hasOffset());
const BlockLayoutInfo *tinfo = VTextBlockData::layoutInfo(block);
Q_ASSERT(tinfo->hasOffset());
if (info.bottom() > y) {
if (tinfo->bottom() > y) {
p_last = block.blockNumber();
break;
}
@ -160,34 +153,35 @@ void VTextDocumentLayout::blockRangeFromRectBS(const QRectF &p_rect,
int VTextDocumentLayout::findBlockByPosition(const QPointF &p_point) const
{
int first = 0, last = m_blocks.size() - 1;
QTextDocument *doc = document();
int first = 0, last = doc->blockCount() - 1;
int y = p_point.y();
while (first <= last) {
int mid = (first + last) / 2;
const BlockInfo &info = m_blocks[mid];
Q_ASSERT(info.hasOffset());
if (info.top() <= y && info.bottom() > y) {
QTextBlock blk = doc->findBlockByNumber(mid);
const BlockLayoutInfo *info = VTextBlockData::layoutInfo(blk);
if (!info) {
return -1;
}
Q_ASSERT(info->hasOffset());
if (info->top() <= y && info->bottom() > y) {
// Found it.
return mid;
} else if (info.top() > y) {
} else if (info->top() > y) {
last = mid - 1;
} else {
first = mid + 1;
}
}
int idx = previousValidBlockNumber(m_blocks.size());
if (y >= m_blocks[idx].bottom()) {
return idx;
QTextBlock blk = doc->lastBlock();
const BlockLayoutInfo *info = VTextBlockData::layoutInfo(blk);
if (y >= info->bottom()) {
return blk.blockNumber();
}
idx = nextValidBlockNumber(-1);
if (y < m_blocks[idx].top()) {
return idx;
}
Q_ASSERT(false);
return -1;
return 0;
}
void VTextDocumentLayout::draw(QPainter *p_painter, const PaintContext &p_context)
@ -200,21 +194,19 @@ void VTextDocumentLayout::draw(QPainter *p_painter, const PaintContext &p_contex
}
QTextDocument *doc = document();
Q_ASSERT(doc->blockCount() == m_blocks.size());
QPointF offset(m_margin, m_blocks[first].top());
QTextBlock block = doc->findBlockByNumber(first);
QPointF offset(m_margin, VTextBlockData::layoutInfo(block)->top());
QTextBlock lastBlock = doc->findBlockByNumber(last);
QPen oldPen = p_painter->pen();
p_painter->setPen(p_context.palette.color(QPalette::Text));
while (block.isValid()) {
const BlockInfo &info = m_blocks[block.blockNumber()];
Q_ASSERT(info.hasOffset());
const BlockLayoutInfo *info = VTextBlockData::layoutInfo(block);
Q_ASSERT(info->hasOffset());
const QRectF &rect = info.m_rect;
const QRectF &rect = info->m_rect;
QTextLayout *layout = block.layout();
if (!block.isVisible()) {
offset.ry() += rect.height();
if (block == lastBlock) {
@ -374,7 +366,7 @@ int VTextDocumentLayout::hitTest(const QPointF &p_point, Qt::HitTestAccuracy p_a
Q_ASSERT(block.isValid());
QTextLayout *layout = block.layout();
int off = 0;
QPointF pos = p_point - QPointF(m_margin, m_blocks[bn].top());
QPointF pos = p_point - QPointF(m_margin, VTextBlockData::layoutInfo(block)->top());
for (int i = 0; i < layout->lineCount(); ++i) {
QTextLine line = layout->lineAt(i);
const QRectF lr = line.naturalTextRect();
@ -408,17 +400,23 @@ QRectF VTextDocumentLayout::frameBoundingRect(QTextFrame *p_frame) const
qMax(document()->pageSize().width(), m_width), qreal(INT_MAX));
}
// Sometimes blockBoundingRect() may be called before documentChanged().
QRectF VTextDocumentLayout::blockBoundingRect(const QTextBlock &p_block) const
{
// Sometimes blockBoundingRect() maybe called before documentChanged().
if (!p_block.isValid() || p_block.blockNumber() >= m_blocks.size()) {
if (!p_block.isValid()) {
return QRectF();
}
const BlockInfo &info = m_blocks[p_block.blockNumber()];
QRectF geo = info.m_rect.adjusted(0, info.m_offset, 0, info.m_offset);
Q_ASSERT(info.hasOffset());
const BlockLayoutInfo *info = VTextBlockData::layoutInfo(p_block);
if (!info->hasOffset()) {
if (info->isNull()) {
const_cast<VTextDocumentLayout *>(this)->layoutBlockAndUpdateOffset(p_block);
} else {
const_cast<VTextDocumentLayout *>(this)->updateOffset(p_block);
}
}
QRectF geo = info->m_rect.adjusted(0, info->m_offset, 0, info->m_offset);
return geo;
}
@ -434,9 +432,16 @@ void VTextDocumentLayout::documentChanged(int p_from, int p_charsRemoved, int p_
QTextBlock changeStartBlock = doc->findBlock(p_from);
// May be an invalid block.
QTextBlock changeEndBlock = doc->findBlock(qMax(0, p_from + charsChanged));
QTextBlock changeEndBlock;
if (p_charsRemoved == p_charsAdded
&& changeStartBlock.position() == p_from
&& changeStartBlock.length() == p_charsAdded) {
// TODO: we may need one more next block.
changeEndBlock = changeStartBlock;
} else {
changeEndBlock = doc->findBlock(qMax(0, p_from + charsChanged));
}
bool needRelayout = false;
if (changeStartBlock == changeEndBlock
&& newBlockCount == m_blockCount) {
// Change single block internal only.
@ -444,38 +449,21 @@ void VTextDocumentLayout::documentChanged(int p_from, int p_charsRemoved, int p_
if (block.isValid() && block.length()) {
QRectF oldBr = blockBoundingRect(block);
clearBlockLayout(block);
layoutBlock(block);
layoutBlockAndUpdateOffset(block);
QRectF newBr = blockBoundingRect(block);
// Only one block is affected.
if (newBr.height() == oldBr.height()) {
// Update document size.
updateDocumentSizeWithOneBlockChanged(block.blockNumber());
updateDocumentSizeWithOneBlockChanged(block);
emit updateBlock(block);
return;
}
}
} else {
// Clear layout of all affected blocks.
QTextBlock block = changeStartBlock;
do {
clearBlockLayout(block);
if (block == changeEndBlock) {
break;
}
block = block.next();
} while(block.isValid());
needRelayout = true;
}
updateBlockCount(newBlockCount, changeStartBlock.blockNumber());
if (needRelayout) {
// Relayout all affected blocks.
QTextBlock block = changeStartBlock;
do {
layoutBlock(block);
if (block == changeEndBlock) {
break;
@ -483,86 +471,24 @@ void VTextDocumentLayout::documentChanged(int p_from, int p_charsRemoved, int p_
block = block.next();
} while(block.isValid());
updateOffset(changeStartBlock);
}
updateDocumentSize();
// TODO: Update the view of all the blocks after changeStartBlock.
const BlockInfo &firstInfo = m_blocks[changeStartBlock.blockNumber()];
emit update(QRectF(0., firstInfo.m_offset, 1000000000., 1000000000.));
qreal offset = VTextBlockData::layoutInfo(changeStartBlock)->m_offset;
emit update(QRectF(0., offset, 1000000000., 1000000000.));
}
// MUST layout out the block after clearBlockLayout().
// TODO: Do we need to clear all the offset after @p_block?
void VTextDocumentLayout::clearBlockLayout(QTextBlock &p_block)
{
p_block.clearLayout();
int num = p_block.blockNumber();
if (num < m_blocks.size()) {
m_blocks[num].reset();
clearOffsetFrom(num + 1);
}
}
void VTextDocumentLayout::clearOffsetFrom(int p_blockNumber)
{
for (int i = p_blockNumber; i < m_blocks.size(); ++i) {
if (!m_blocks[i].hasOffset()) {
Q_ASSERT(validateBlocks());
break;
}
m_blocks[i].m_offset = -1;
}
}
void VTextDocumentLayout::fillOffsetFrom(int p_blockNumber)
{
qreal offset = m_blocks[p_blockNumber].bottom();
for (int i = p_blockNumber + 1; i < m_blocks.size(); ++i) {
BlockInfo &info = m_blocks[i];
if (!info.m_rect.isNull()) {
info.m_offset = offset;
offset += info.m_rect.height();
} else {
break;
}
}
}
bool VTextDocumentLayout::validateBlocks() const
{
bool valid = true;
for (int i = 0; i < m_blocks.size(); ++i) {
const BlockInfo &info = m_blocks[i];
if (!info.hasOffset()) {
valid = false;
} else if (!valid) {
return false;
}
}
return true;
}
void VTextDocumentLayout::updateBlockCount(int p_count, int p_changeStartBlock)
{
if (m_blockCount != p_count) {
m_blockCount = p_count;
m_blocks.resize(m_blockCount);
// Fix m_blocks.
QTextBlock block = document()->findBlockByNumber(p_changeStartBlock);
while (block.isValid()) {
BlockInfo &info = m_blocks[block.blockNumber()];
info.reset();
QRectF br = blockRectFromTextLayout(block);
if (!br.isNull()) {
info.m_rect = br;
}
block = block.next();
}
}
BlockLayoutInfo *info = VTextBlockData::layoutInfo(p_block);
info->reset();
}
void VTextDocumentLayout::layoutBlock(const QTextBlock &p_block)
@ -600,6 +526,72 @@ void VTextDocumentLayout::layoutBlock(const QTextBlock &p_block)
finishBlockLayout(p_block, markers, images);
}
void VTextDocumentLayout::updateOffsetBefore(const QTextBlock &p_block)
{
BlockLayoutInfo *info = VTextBlockData::layoutInfo(p_block);
Q_ASSERT(!info->isNull());
if (p_block.blockNumber() == 0) {
info->m_offset = 0;
} else {
QTextBlock blk = p_block.previous();
while (blk.isValid()) {
BlockLayoutInfo *pinfo = VTextBlockData::layoutInfo(blk);
if (!pinfo->hasOffset()) {
int num = blk.blockNumber();
if (pinfo->isNull()) {
layoutBlock(blk);
}
if (num == 0) {
pinfo->m_offset = 0;
} else {
blk = blk.previous();
continue;
}
}
// Now we reach a block with offset.
qreal offset = pinfo->bottom();
blk = blk.next();
while (blk.isValid()) {
BlockLayoutInfo *ninfo = VTextBlockData::layoutInfo(blk);
ninfo->m_offset = offset;
if (blk.blockNumber() == p_block.blockNumber()) {
break;
}
offset = ninfo->bottom();
blk = blk.next();
}
}
Q_ASSERT(info->hasOffset());
}
}
void VTextDocumentLayout::updateOffsetAfter(const QTextBlock &p_block)
{
BlockLayoutInfo *info = VTextBlockData::layoutInfo(p_block);
Q_ASSERT(info->hasOffset());
qreal offset = info->bottom();
QTextBlock blk = p_block.next();
while (blk.isValid()) {
BlockLayoutInfo *ninfo = VTextBlockData::layoutInfo(blk);
if (ninfo->isNull()) {
break;
}
if (realEqual(ninfo->m_offset, offset)) {
break;
}
ninfo->m_offset = offset;
offset = ninfo->bottom();
blk = blk.next();
}
}
qreal VTextDocumentLayout::layoutLines(const QTextBlock &p_block,
QTextLayout *p_tl,
QVector<Marker> &p_markers,
@ -607,17 +599,17 @@ qreal VTextDocumentLayout::layoutLines(const QTextBlock &p_block,
qreal p_availableWidth,
qreal p_height)
{
Q_ASSERT(p_block.isValid());
// Handle block inline image.
bool hasInlineImages = false;
const QVector<VPreviewInfo *> *info = NULL;
if (m_blockImageEnabled) {
VTextBlockData *blockData = dynamic_cast<VTextBlockData *>(p_block.userData());
if (blockData) {
info = &(blockData->getPreviews());
if (!info->isEmpty()
&& info->first()->m_imageInfo.m_inline) {
hasInlineImages = true;
}
VTextBlockData *blockData = VTextBlockData::blockData(p_block);
info = &(blockData->getPreviews());
if (!info->isEmpty()
&& info->first()->m_imageInfo.m_inline) {
hasInlineImages = true;
}
}
@ -704,32 +696,23 @@ void VTextDocumentLayout::finishBlockLayout(const QTextBlock &p_block,
const QVector<Marker> &p_markers,
const QVector<ImagePaintInfo> &p_images)
{
// Update rect and offset.
Q_ASSERT(p_block.isValid());
int num = p_block.blockNumber();
Q_ASSERT(m_blocks.size() > num);
ImagePaintInfo ipi;
BlockInfo &info = m_blocks[num];
info.reset();
info.m_rect = blockRectFromTextLayout(p_block, &ipi);
Q_ASSERT(!info.m_rect.isNull());
int pre = previousValidBlockNumber(num);
if (pre == -1) {
info.m_offset = 0;
} else if (m_blocks[pre].hasOffset()) {
info.m_offset = m_blocks[pre].bottom();
}
BlockLayoutInfo *info = VTextBlockData::layoutInfo(p_block);
Q_ASSERT(info->isNull());
info->reset();
info->m_rect = blockRectFromTextLayout(p_block, &ipi);
Q_ASSERT(!info->m_rect.isNull());
bool hasImage = false;
if (ipi.isValid()) {
Q_ASSERT(p_markers.isEmpty());
Q_ASSERT(p_images.isEmpty());
info.m_images.append(ipi);
info->m_images.append(ipi);
hasImage = true;
} else if (!p_markers.isEmpty()) {
// Q_ASSERT(!p_images.isEmpty());
info.m_markers = p_markers;
info.m_images = p_images;
info->m_markers = p_markers;
info->m_images = p_images;
hasImage = true;
}
@ -739,57 +722,45 @@ void VTextDocumentLayout::finishBlockLayout(const QTextBlock &p_block,
// Will be adjusted using offset.
Marker mk;
mk.m_start = QPointF(-1, 0);
mk.m_end = QPointF(-1, info.m_rect.height());
mk.m_end = QPointF(-1, info->m_rect.height());
info.m_markers.append(mk);
}
if (info.hasOffset()) {
fillOffsetFrom(num);
}
}
int VTextDocumentLayout::previousValidBlockNumber(int p_number) const
{
return p_number >= 0 ? p_number - 1 : -1;
}
int VTextDocumentLayout::nextValidBlockNumber(int p_number) const
{
if (p_number <= -1) {
return 0;
} else if (p_number >= m_blocks.size() - 1) {
return -1;
} else {
return p_number + 1;
info->m_markers.append(mk);
}
}
void VTextDocumentLayout::updateDocumentSize()
{
// The last valid block.
int idx = previousValidBlockNumber(m_blocks.size());
Q_ASSERT(idx > -1);
if (m_blocks[idx].hasOffset()) {
int oldHeight = m_height;
int oldWidth = m_width;
m_height = m_blocks[idx].bottom();
m_width = 0;
for (int i = 0; i < m_blocks.size(); ++i) {
const BlockInfo &info = m_blocks[i];
Q_ASSERT(info.hasOffset());
if (m_width < info.m_rect.width()) {
m_width = info.m_rect.width();
m_maximumWidthBlockNumber = i;
}
QTextBlock block = document()->lastBlock();
const BlockLayoutInfo *info = VTextBlockData::layoutInfo(block);
if (!info->hasOffset()) {
if (info->isNull()) {
layoutBlock(block);
}
if (oldHeight != m_height
|| oldWidth != m_width) {
emit documentSizeChanged(documentSize());
updateOffsetBefore(block);
}
int oldHeight = m_height;
int oldWidth = m_width;
m_height = info->bottom();
m_width = 0;
QTextBlock blk = document()->firstBlock();
while (blk.isValid()) {
const BlockLayoutInfo *ninfo = VTextBlockData::layoutInfo(blk);
Q_ASSERT(ninfo->hasOffset());
if (m_width < ninfo->m_rect.width()) {
m_width = ninfo->m_rect.width();
m_maximumWidthBlockNumber = blk.blockNumber();
}
blk = blk.next();
}
if (oldHeight != m_height
|| oldWidth != m_width) {
emit documentSizeChanged(documentSize());
}
}
@ -815,32 +786,31 @@ QRectF VTextDocumentLayout::blockRectFromTextLayout(const QTextBlock &p_block,
// Handle block non-inline image.
if (m_blockImageEnabled) {
VTextBlockData *blockData = dynamic_cast<VTextBlockData *>(p_block.userData());
if (blockData) {
const QVector<VPreviewInfo *> &info = blockData->getPreviews();
if (info.size() == 1) {
const VPreviewedImageInfo& img = info.first()->m_imageInfo;
if (!img.m_inline) {
int maximumWidth = tlRect.width();
int padding;
QSize size;
adjustImagePaddingAndSize(&img, maximumWidth, padding, size);
VTextBlockData *blockData = VTextBlockData::blockData(p_block);
Q_ASSERT(blockData);
const QVector<VPreviewInfo *> &info = blockData->getPreviews();
if (info.size() == 1) {
const VPreviewedImageInfo& img = info.first()->m_imageInfo;
if (!img.m_inline) {
int maximumWidth = tlRect.width();
int padding;
QSize size;
adjustImagePaddingAndSize(&img, maximumWidth, padding, size);
if (p_image) {
p_image->m_name = img.m_imageName;
p_image->m_rect = QRectF(padding + m_margin,
br.height() + m_lineLeading,
size.width(),
size.height());
if (!img.m_background.isEmpty()) {
p_image->m_background = QColor(img.m_background);
}
if (p_image) {
p_image->m_name = img.m_imageName;
p_image->m_rect = QRectF(padding + m_margin,
br.height() + m_lineLeading,
size.width(),
size.height());
if (!img.m_background.isEmpty()) {
p_image->m_background = QColor(img.m_background);
}
int dw = padding + size.width() + m_margin - br.width();
int dh = size.height() + m_lineLeading;
br.adjust(0, 0, dw > 0 ? dw : 0, dh);
}
int dw = padding + size.width() + m_margin - br.width();
int dh = size.height() + m_lineLeading;
br.adjust(0, 0, dw > 0 ? dw : 0, dh);
}
}
}
@ -855,15 +825,15 @@ QRectF VTextDocumentLayout::blockRectFromTextLayout(const QTextBlock &p_block,
return br;
}
void VTextDocumentLayout::updateDocumentSizeWithOneBlockChanged(int p_blockNumber)
void VTextDocumentLayout::updateDocumentSizeWithOneBlockChanged(const QTextBlock &p_block)
{
const BlockInfo &info = m_blocks[p_blockNumber];
qreal width = info.m_rect.width();
const BlockLayoutInfo *info = VTextBlockData::layoutInfo(p_block);
qreal width = info->m_rect.width();
if (width > m_width) {
m_width = width;
m_maximumWidthBlockNumber = p_blockNumber;
m_maximumWidthBlockNumber = p_block.blockNumber();
emit documentSizeChanged(documentSize());
} else if (width < m_width && p_blockNumber == m_maximumWidthBlockNumber) {
} else if (width < m_width && p_block.blockNumber() == m_maximumWidthBlockNumber) {
// Shrink the longest block.
updateDocumentSize();
}
@ -927,11 +897,7 @@ void VTextDocumentLayout::drawImages(QPainter *p_painter,
const QTextBlock &p_block,
const QPointF &p_offset)
{
if (m_blocks.size() <= p_block.blockNumber()) {
return;
}
const QVector<ImagePaintInfo> &images = m_blocks[p_block.blockNumber()].m_images;
const QVector<ImagePaintInfo> &images = VTextBlockData::layoutInfo(p_block)->m_images;
if (images.isEmpty()) {
return;
}
@ -962,11 +928,7 @@ void VTextDocumentLayout::drawMarkers(QPainter *p_painter,
const QTextBlock &p_block,
const QPointF &p_offset)
{
if (m_blocks.size() <= p_block.blockNumber()) {
return;
}
const QVector<Marker> &markers = m_blocks[p_block.blockNumber()].m_markers;
const QVector<Marker> &markers = VTextBlockData::layoutInfo(p_block)->m_markers;
if (markers.isEmpty()) {
return;
}
@ -989,18 +951,16 @@ void VTextDocumentLayout::relayout()
// Update the margin.
m_margin = doc->documentMargin();
QTextBlock block = doc->lastBlock();
QTextBlock block = doc->firstBlock();
while (block.isValid()) {
clearBlockLayout(block);
block = block.previous();
}
block = doc->firstBlock();
while (block.isValid()) {
layoutBlock(block);
block = block.next();
}
updateOffsetBefore(doc->lastBlock());
updateDocumentSize();
emit update(QRectF(0., 0., 1000000000., 1000000000.));
@ -1015,15 +975,27 @@ void VTextDocumentLayout::relayout(const OrderedIntSet &p_blocks)
QTextDocument *doc = document();
// Need to relayout and update blocks in ascending order.
QVector<QTextBlock> blocks;
blocks.reserve(p_blocks.size());
for (auto bn = p_blocks.keyBegin(); bn != p_blocks.keyEnd(); ++bn) {
QTextBlock block = doc->findBlockByNumber(*bn);
if (block.isValid()) {
blocks.append(block);
clearBlockLayout(block);
layoutBlock(block);
emit updateBlock(block);
}
}
if (blocks.isEmpty()) {
return;
}
updateOffset(blocks.last());
for (auto const & blk : blocks) {
emit updateBlock(blk);
}
updateDocumentSize();
}

132
src/vtextdocumentlayout.h
View File

@ -7,6 +7,7 @@
#include <QMap>
#include "vconstants.h"
#include "vtextdocumentlayoutdata.h"
class VImageResourceManager2;
struct VPreviewedImageInfo;
@ -84,86 +85,22 @@ protected:
void documentChanged(int p_from, int p_charsRemoved, int p_charsAdded) Q_DECL_OVERRIDE;
private:
// Denote the start and end position of a marker line.
struct Marker
{
QPointF m_start;
QPointF m_end;
};
struct ImagePaintInfo
{
// The rect to draw the image.
QRectF m_rect;
// Name of the image.
QString m_name;
// Forced background.
QColor m_background;
bool isValid() const
{
return !m_name.isEmpty();
}
bool hasForcedBackground() const
{
return m_background.isValid();
}
};
struct BlockInfo
{
BlockInfo()
{
reset();
}
void reset()
{
m_offset = -1;
m_rect = QRectF();
m_markers.clear();
m_images.clear();
}
bool hasOffset() const
{
return m_offset > -1 && !m_rect.isNull();
}
qreal top() const
{
Q_ASSERT(hasOffset());
return m_offset;
}
qreal bottom() const
{
Q_ASSERT(hasOffset());
return m_offset + m_rect.height();
}
// Y offset of this block.
// -1 for invalid.
qreal m_offset;
// The bounding rect of this block, including the margins.
// Null for invalid.
QRectF m_rect;
// Markers to draw for this block.
// Y is the offset within this block.
QVector<Marker> m_markers;
// Images to draw for this block.
// Y is the offset within this block.
QVector<ImagePaintInfo> m_images;
};
// Layout one block.
// Only update the rect of the block. Offset is not updated yet.
void layoutBlock(const QTextBlock &p_block);
// Update the offset of @p_block.
// @p_block has a valid layout.
// After the call, all block before @p_block will have the correct layout and offset.
void updateOffsetBefore(const QTextBlock &p_block);
// Update the offset of blocks after @p_block if they are layouted.
void updateOffsetAfter(const QTextBlock &p_block);
void updateOffset(const QTextBlock &p_block);
void layoutBlockAndUpdateOffset(const QTextBlock &p_block);
// Returns the total height of this block after layouting lines and inline
// images.
qreal layoutLines(const QTextBlock &p_block,
@ -200,28 +137,11 @@ private:
// Also clear all the offset behind this block.
void clearBlockLayout(QTextBlock &p_block);
// Clear the offset of all the blocks from @p_blockNumber.
void clearOffsetFrom(int p_blockNumber);
// Fill the offset filed from @p_blockNumber + 1.
void fillOffsetFrom(int p_blockNumber);
// Update block count to @p_count due to document change.
// Maintain m_blocks.
// @p_changeStartBlock is the block number of the start block in this change.
void updateBlockCount(int p_count, int p_changeStartBlock);
bool validateBlocks() const;
// Update rect of a block.
void finishBlockLayout(const QTextBlock &p_block,
const QVector<Marker> &p_markers,
const QVector<ImagePaintInfo> &p_images);
int previousValidBlockNumber(int p_number) const;
int nextValidBlockNumber(int p_number) const;
// Update block count and m_blocks size.
void updateDocumentSize();
QVector<QTextLayout::FormatRange> formatRangeFromSelection(const QTextBlock &p_block,
@ -242,9 +162,9 @@ private:
QRectF blockRectFromTextLayout(const QTextBlock &p_block,
ImagePaintInfo *p_image = NULL);
// Update document size when only block @p_blockNumber is changed and the height
// remain the same.
void updateDocumentSizeWithOneBlockChanged(int p_blockNumber);
// Update document size when only @p_block is changed and the height
// remains the same.
void updateDocumentSizeWithOneBlockChanged(const QTextBlock &p_block);
void adjustImagePaddingAndSize(const VPreviewedImageInfo *p_info,
int p_maximumWidth,
@ -291,8 +211,6 @@ private:
// Right margin for cursor.
qreal m_cursorMargin;
QVector<BlockInfo> m_blocks;
VImageResourceManager2 *m_imageMgr;
bool m_blockImageEnabled;
@ -395,4 +313,16 @@ inline int VTextDocumentLayout::cursorWidth() const
{
return m_cursorWidth;
}
inline void VTextDocumentLayout::layoutBlockAndUpdateOffset(const QTextBlock &p_block)
{
layoutBlock(p_block);
updateOffset(p_block);
}
inline void VTextDocumentLayout::updateOffset(const QTextBlock &p_block)
{
updateOffsetBefore(p_block);
updateOffsetAfter(p_block);
}
#endif // VTEXTDOCUMENTLAYOUT_H

86
src/vtextdocumentlayoutdata.h Normal file
View File

@ -0,0 +1,86 @@
#ifndef VTEXTDOCUMENTLAYOUTDATA_H
#define VTEXTDOCUMENTLAYOUTDATA_H
// Denote the start and end position of a marker line.
struct Marker
{
QPointF m_start;
QPointF m_end;
};
struct ImagePaintInfo
{
// The rect to draw the image.
QRectF m_rect;
// Name of the image.
QString m_name;
// Forced background.
QColor m_background;
bool isValid() const
{
return !m_name.isEmpty();
}
bool hasForcedBackground() const
{
return m_background.isValid();
}
};
struct BlockLayoutInfo
{
BlockLayoutInfo()
: m_offset(-1)
{
}
void reset()
{
m_offset = -1;
m_rect = QRectF();
m_markers.clear();
m_images.clear();
}
bool isNull() const
{
return m_rect.isNull();
}
bool hasOffset() const
{
return m_offset > -1 && !m_rect.isNull();
}
qreal top() const
{
Q_ASSERT(hasOffset());
return m_offset;
}
qreal bottom() const
{
Q_ASSERT(hasOffset());
return m_offset + m_rect.height();
}
// Y offset of this block.
// -1 for invalid.
qreal m_offset;
// The bounding rect of this block, including the margins.
// Null for invalid.
QRectF m_rect;
// Markers to draw for this block.
// Y is the offset within this block.
QVector<Marker> m_markers;
// Images to draw for this block.
// Y is the offset within this block.
QVector<ImagePaintInfo> m_images;
};
#endif // VTEXTDOCUMENTLAYOUTDATA_H