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#include "searchtextlocator.h"
#include "common/unused.h"
#include <QTextCursor>
#include <QTextBlock>
#include <QRegExp>
#include <QDebug>
SearchTextLocator::SearchTextLocator(QTextDocument* document, QObject* parent) :
QObject(parent), document(document)
{
}
QString SearchTextLocator::getLookupString() const
{
return lookupString;
}
void SearchTextLocator::setLookupString(const QString& value)
{
lookupString = value;
lastMatchStart = -1;
lastMatchEnd = -1;
}
QString SearchTextLocator::getReplaceString() const
{
return replaceString;
}
void SearchTextLocator::setReplaceString(const QString& value)
{
replaceString = value;
}
bool SearchTextLocator::getCaseSensitive() const
{
return caseSensitive;
}
void SearchTextLocator::setCaseSensitive(bool value)
{
caseSensitive = value;
}
bool SearchTextLocator::getRegularExpression() const
{
return regularExpression;
}
void SearchTextLocator::setRegularExpression(bool value)
{
regularExpression = value;
}
bool SearchTextLocator::getSearchBackwards() const
{
return searchBackwards;
}
void SearchTextLocator::setSearchBackwards(bool value)
{
searchBackwards = value;
}
int SearchTextLocator::getStartPosition() const
{
return startPosition;
}
void SearchTextLocator::setStartPosition(int value)
{
startPosition = value;
initialStartPosition = value;
afterDocPositionSwitch = false;
lastMatchStart = -1;
lastMatchEnd = -1;
emit replaceAvailable(false);
}
QTextDocument::FindFlags SearchTextLocator::getFlags()
{
QTextDocument::FindFlags flags;
if (caseSensitive)
flags |= QTextDocument::FindCaseSensitively;
if (searchBackwards)
flags |= QTextDocument::FindBackward;
return flags;
}
void SearchTextLocator::notFound()
{
startPosition = initialStartPosition;
afterDocPositionSwitch = false;
emit reachedEnd();
emit replaceAvailable(false);
}
QTextCursor SearchTextLocator::findInWholeDoc(QTextDocument::FindFlags flags)
{
// Simply find a match
QTextCursor cursor;
if (regularExpression)
cursor = document->find(QRegExp(lookupString), startPosition, flags);
else
cursor = document->find(lookupString, startPosition, flags);
// If not matched, see if we can find match at the other part of document (before/after init start position)
if (cursor.isNull() && !afterDocPositionSwitch)
{
afterDocPositionSwitch = true;
int start = 0;
if (flags.testFlag(QTextDocument::FindBackward))
start = document->lastBlock().position() + document->lastBlock().length();
if (regularExpression)
cursor = document->find(QRegExp(lookupString), start, flags);
else
cursor = document->find(lookupString, start, flags);
}
// If we found a match after/before start position, but it's already before/after start position, we cannot report it as a match.
if ((afterDocPositionSwitch && !cursor.isNull()) && // we have a match after switching doc position
((!flags.testFlag(QTextDocument::FindBackward) && cursor.selectionStart() >= initialStartPosition) || // it's after init pos
(flags.testFlag(QTextDocument::FindBackward) && cursor.selectionEnd() <= initialStartPosition))) // it's before init pos
{
cursor = QTextCursor(); // exceeded search range
}
// If we do have a match, we need to remember its parameters for the next lookup.
if (!cursor.isNull())
{
if (flags.testFlag(QTextDocument::FindBackward))
startPosition = cursor.selectionStart();
else
startPosition = cursor.selectionEnd();
lastMatchStart = cursor.selectionStart();
lastMatchEnd = cursor.selectionEnd();
}
return cursor;
}
void SearchTextLocator::replaceCurrent()
{
if (lastMatchStart == -1 || lastMatchEnd == -1)
return;
QTextCursor cursor(document);
cursor.setPosition(lastMatchStart);
cursor.setPosition(lastMatchEnd, QTextCursor::KeepAnchor);
cursor.removeSelectedText();
cursor.insertText(replaceString);
}
bool SearchTextLocator::find(QTextDocument::FindFlags flags)
{
if (flags == 0)
flags = getFlags();
QTextCursor cursor = findInWholeDoc(flags);
if (cursor.isNull())
{
notFound();
return false;
}
emit found(cursor.selectionStart(), cursor.selectionEnd());
emit replaceAvailable(true);
return true;
}
void SearchTextLocator::findNext()
{
QTextDocument::FindFlags flags = getFlags();
flags &= !QTextDocument::FindBackward;
find(flags);
}
void SearchTextLocator::findPrev()
{
QTextDocument::FindFlags flags = getFlags();
flags |= QTextDocument::FindBackward;
find(flags);
}
bool SearchTextLocator::replaceAndFind()
{
replaceCurrent();
return find();
}
void SearchTextLocator::replaceAll()
{
while (replaceAndFind())
continue;
}
void SearchTextLocator::cursorMoved()
{
emit replaceAvailable(false);
}
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