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refine markdown editor

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This commit is contained in:
Le Tan 2018-04-28 21:37:44 +08:00
parent 5dbdcb8cba
commit d683afa271
1 changed files with 20 additions and 28 deletions
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48
src/vmdeditor.cpp
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@ -190,7 +190,7 @@ bool VMdEditor::scrollToBlock(int p_blockNumber)
}
// Get the visual offset of a block.
#define GETVISUALOFFSETY (contentOffsetY() + (int)rect.y())
#define GETVISUALOFFSETY(x) (contentOffsetY() + (int)(x).y())
void VMdEditor::makeBlockVisible(const QTextBlock &p_block)
{
@ -213,9 +213,9 @@ void VMdEditor::makeBlockVisible(const QTextBlock &p_block)
bool moved = false;
QAbstractTextDocumentLayout *layout = document()->documentLayout();
QRectF rect = layout->blockBoundingRect(p_block);
int y = GETVISUALOFFSETY;
int rectHeight = (int)rect.height();
QRectF rt = layout->blockBoundingRect(p_block);
int y = GETVISUALOFFSETY(rt);
int rectHeight = (int)rt.height();
// Handle the case rectHeight >= height.
if (rectHeight >= height) {
@ -224,18 +224,18 @@ void VMdEditor::makeBlockVisible(const QTextBlock &p_block)
while (y + rectHeight < height && vbar->value() > vbar->minimum()) {
moved = true;
vbar->setValue(vbar->value() - vbar->singleStep());
rect = layout->blockBoundingRect(p_block);
rectHeight = (int)rect.height();
y = GETVISUALOFFSETY;
rt = layout->blockBoundingRect(p_block);
rectHeight = (int)rt.height();
y = GETVISUALOFFSETY(rt);
}
} else if (y > 0) {
// Need to scroll down.
while (y > 0 && vbar->value() < vbar->maximum()) {
moved = true;
vbar->setValue(vbar->value() + vbar->singleStep());
rect = layout->blockBoundingRect(p_block);
rectHeight = (int)rect.height();
y = GETVISUALOFFSETY;
rt = layout->blockBoundingRect(p_block);
rectHeight = (int)rt.height();
y = GETVISUALOFFSETY(rt);
}
if (y < 0) {
@ -245,36 +245,28 @@ void VMdEditor::makeBlockVisible(const QTextBlock &p_block)
}
}
if (moved) {
qDebug() << "scroll to make huge block visible";
}
return;
}
// There is an extra line leading in the layout, so there will always be a scroll
// action to scroll the page down.
while (y < 0 && vbar->value() > vbar->minimum()) {
moved = true;
vbar->setValue(vbar->value() - vbar->singleStep());
rect = layout->blockBoundingRect(p_block);
rectHeight = (int)rect.height();
y = GETVISUALOFFSETY;
rt = layout->blockBoundingRect(p_block);
y = GETVISUALOFFSETY(rt);
}
if (moved) {
qDebug() << "scroll page down to make block visible";
return;
}
while (y + rectHeight > height && vbar->value() < vbar->maximum()) {
moved = true;
vbar->setValue(vbar->value() + vbar->singleStep());
rect = layout->blockBoundingRect(p_block);
rectHeight = (int)rect.height();
y = GETVISUALOFFSETY;
}
if (moved) {
qDebug() << "scroll page up to make block visible";
rt = layout->blockBoundingRect(p_block);
rectHeight = (int)rt.height();
y = GETVISUALOFFSETY(rt);
}
}
@ -396,9 +388,9 @@ bool VMdEditor::isBlockVisible(const QTextBlock &p_block)
}
QAbstractTextDocumentLayout *layout = document()->documentLayout();
QRectF rect = layout->blockBoundingRect(p_block);
int y = GETVISUALOFFSETY;
int rectHeight = (int)rect.height();
QRectF rt = layout->blockBoundingRect(p_block);
int y = GETVISUALOFFSETY(rt);
int rectHeight = (int)rt.height();
return (y >= 0 && y < height) || (y < 0 && y + rectHeight > 0);
}