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Overview.cpp
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313 lines (277 loc) · 9.45 KB
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/*
* This file is part of KDiff3.
*
* SPDX-FileCopyrightText: 2002-2011 Joachim Eibl, joachim.eibl at gmx.de
* SPDX-FileCopyrightText: 2018-2020 Michael Reeves reeves.87@gmail.com
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "Overview.h"
#include "diff.h"
#include "kdiff3.h"
#include "MergeEditLine.h"
#include "options.h"
#include <algorithm> // for max
#include <QColor>
#include <QMouseEvent>
#include <QPainter>
#include <QPixmap>
#include <QScrollBar>
#include <QSize>
Overview::Overview(const QSharedPointer<Options>& pOptions)
//: QWidget( pParent, 0, Qt::WNoAutoErase )
{
m_pDiff3LineList = nullptr;
m_pOptions = pOptions;
mOverviewMode = e_OverviewMode::eOMNormal;
m_nofLines = 1;
setUpdatesEnabled(false);
m_firstLine = 0;
m_pageHeight = 0;
setFixedWidth(20);
}
void Overview::init(Diff3LineList* pDiff3LineList)
{
m_pDiff3LineList = pDiff3LineList;
m_pixmap = QPixmap(QSize(0, 0)); // make sure that a redraw happens
update();
}
void Overview::reset()
{
m_pDiff3LineList = nullptr;
}
void Overview::slotRedraw()
{
m_pixmap = QPixmap(QSize(0, 0)); // make sure that a redraw happens
update();
}
void Overview::setRange(QtNumberType firstLine, QtNumberType pageHeight)
{
m_firstLine = firstLine;
m_pageHeight = pageHeight;
update();
}
void Overview::setFirstLine(QtNumberType firstLine)
{
QScrollBar* scrollBar = qobject_cast<QScrollBar*>(sender());
if(Q_UNLIKELY(scrollBar == nullptr))
{
m_firstLine = firstLine;
update();
}
else
setRange(firstLine, scrollBar->pageStep());
}
void Overview::setOverviewMode(e_OverviewMode eOverviewMode)
{
mOverviewMode = eOverviewMode;
slotRedraw();
}
e_OverviewMode Overview::getOverviewMode()
{
return mOverviewMode;
}
void Overview::mousePressEvent(QMouseEvent* e)
{
int h = height() - 1;
int h1 = h * m_pageHeight / std::max(1, m_nofLines) + 3;
if(h > 0)
Q_EMIT setLine((e->y() - h1 / 2) * m_nofLines / h);
}
void Overview::mouseMoveEvent(QMouseEvent* e)
{
mousePressEvent(e);
}
void Overview::setPaintingAllowed(bool bAllowPainting)
{
if(updatesEnabled() != bAllowPainting)
{
setUpdatesEnabled(bAllowPainting);
if(bAllowPainting)
update();
else
reset();
}
}
void Overview::drawColumn(QPainter& p, e_OverviewMode eOverviewMode, int x, int w, int h, int nofLines)
{
p.setPen(Qt::black);
p.drawLine(x, 0, x, h);
if(nofLines == 0) return;
int line = 0;
int oldY = 0;
int oldConflictY = -1;
int wrapLineIdx = 0;
Diff3LineList::const_iterator i;
for(i = m_pDiff3LineList->begin(); i != m_pDiff3LineList->end();)
{
const Diff3Line& d3l = *i;
int y = h * (line + 1) / nofLines;
MergeLine lMergeLine;
e_MergeDetails md;
bool bConflict;
bool bLineRemoved;
lMergeLine.mergeOneLine(d3l, bLineRemoved, !KDiff3App::isTripleDiff());
md = lMergeLine.details();
bConflict = lMergeLine.isConflict();
QColor c = m_pOptions->backgroundColor();
bool bWhiteSpaceChange = false;
//if( bConflict ) c=m_pOptions->conflictColor();
//else
switch(eOverviewMode)
{
case e_OverviewMode::eOMNormal:
switch(md)
{
case e_MergeDetails::eDefault:
case e_MergeDetails::eNoChange:
c = m_pOptions->backgroundColor();
break;
case e_MergeDetails::eBAdded:
case e_MergeDetails::eBDeleted:
case e_MergeDetails::eBChanged:
c = bConflict ? m_pOptions->conflictColor() : m_pOptions->bColor();
bWhiteSpaceChange = d3l.isEqualAB() || (d3l.isWhiteLine(e_SrcSelector::A) && d3l.isWhiteLine(e_SrcSelector::B));
break;
case e_MergeDetails::eCAdded:
case e_MergeDetails::eCDeleted:
case e_MergeDetails::eCChanged:
bWhiteSpaceChange = d3l.isEqualAC() || (d3l.isWhiteLine(e_SrcSelector::A) && d3l.isWhiteLine(e_SrcSelector::C));
c = bConflict ? m_pOptions->conflictColor() : m_pOptions->cColor();
break;
case e_MergeDetails::eBCChanged: // conflict
case e_MergeDetails::eBCChangedAndEqual: // possible conflict
case e_MergeDetails::eBCDeleted: // possible conflict
case e_MergeDetails::eBChanged_CDeleted: // conflict
case e_MergeDetails::eCChanged_BDeleted: // conflict
case e_MergeDetails::eBCAdded: // conflict
case e_MergeDetails::eBCAddedAndEqual: // possible conflict
c = m_pOptions->conflictColor();
break;
}
break;
case e_OverviewMode::eOMAvsB:
switch(md)
{
case e_MergeDetails::eDefault:
case e_MergeDetails::eNoChange:
case e_MergeDetails::eCAdded:
case e_MergeDetails::eCDeleted:
case e_MergeDetails::eCChanged:
break;
default:
c = m_pOptions->conflictColor();
bWhiteSpaceChange = d3l.isEqualAB() || (d3l.isWhiteLine(e_SrcSelector::A) && d3l.isWhiteLine(e_SrcSelector::B));
break;
}
break;
case e_OverviewMode::eOMAvsC:
switch(md)
{
case e_MergeDetails::eDefault:
case e_MergeDetails::eNoChange:
case e_MergeDetails::eBAdded:
case e_MergeDetails::eBDeleted:
case e_MergeDetails::eBChanged:
break;
default:
c = m_pOptions->conflictColor();
bWhiteSpaceChange = d3l.isEqualAC() || (d3l.isWhiteLine(e_SrcSelector::A) && d3l.isWhiteLine(e_SrcSelector::C));
break;
}
break;
case e_OverviewMode::eOMBvsC:
switch(md)
{
case e_MergeDetails::eDefault:
case e_MergeDetails::eNoChange:
case e_MergeDetails::eBCChangedAndEqual:
case e_MergeDetails::eBCDeleted:
case e_MergeDetails::eBCAddedAndEqual:
break;
default:
c = m_pOptions->conflictColor();
bWhiteSpaceChange = d3l.isEqualBC() || (d3l.isWhiteLine(e_SrcSelector::B) && d3l.isWhiteLine(e_SrcSelector::C));
break;
}
break;
}
int x2 = x;
int w2 = w;
if(!KDiff3App::isTripleDiff())
{
if(!d3l.getLineA().isValid() && d3l.getLineB().isValid())
{
c = m_pOptions->aColor();
x2 = w / 2;
w2 = x2;
}
if(d3l.getLineA().isValid() && !d3l.getLineB().isValid())
{
c = m_pOptions->bColor();
w2 = w / 2;
}
}
if(!bWhiteSpaceChange || m_pOptions->m_bShowWhiteSpace)
{
// Make sure that lines with conflict are not overwritten.
if(c == m_pOptions->conflictColor())
{
p.fillRect(x2 + 1, oldY, w2, std::max(1, y - oldY), bWhiteSpaceChange ? QBrush(c, Qt::Dense4Pattern) : QBrush(c));
oldConflictY = oldY;
}
else if(c != m_pOptions->backgroundColor() && oldY > oldConflictY)
{
p.fillRect(x2 + 1, oldY, w2, std::max(1, y - oldY), bWhiteSpaceChange ? QBrush(c, Qt::Dense4Pattern) : QBrush(c));
}
}
oldY = y;
++line;
if(m_pOptions->wordWrapOn())
{
++wrapLineIdx;
if(wrapLineIdx >= d3l.linesNeededForDisplay())
{
wrapLineIdx = 0;
++i;
}
}
else
{
++i;
}
}
}
void Overview::paintEvent(QPaintEvent*)
{
if(m_pDiff3LineList == nullptr) return;
int h = height() - 1;
int w = width();
const auto dpr = devicePixelRatioF();
if(m_pixmap.size() != size() * dpr)
{
m_nofLines = m_pDiff3LineList->numberOfLines(m_pOptions->wordWrapOn());
m_pixmap = QPixmap(size() * dpr);
m_pixmap.setDevicePixelRatio(dpr);
QPainter p(&m_pixmap);
p.fillRect(rect(), m_pOptions->backgroundColor());
if(!KDiff3App::isTripleDiff() || mOverviewMode == e_OverviewMode::eOMNormal)
{
drawColumn(p, e_OverviewMode::eOMNormal, 0, w, h, m_nofLines);
}
else
{
drawColumn(p, e_OverviewMode::eOMNormal, 0, w / 2, h, m_nofLines);
drawColumn(p, mOverviewMode, w / 2, w / 2, h, m_nofLines);
}
}
QPainter painter(this);
painter.drawPixmap(0, 0, m_pixmap);
int y1 = 0, h1 = 0;
if(m_nofLines > 0)
{
y1 = h * m_firstLine / m_nofLines - 1;
h1 = h * m_pageHeight / m_nofLines + 3;
}
painter.setPen(Qt::black);
painter.drawRect(1, y1, w - 1, h1);
}