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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/
#include "componenttextmodifier.h"
using namespace QmlDesigner;
ComponentTextModifier::ComponentTextModifier(TextModifier *originalModifier, int componentStartOffset, int componentEndOffset, int rootStartOffset) :
m_originalModifier(originalModifier),
m_componentStartOffset(componentStartOffset),
m_componentEndOffset(componentEndOffset),
m_rootStartOffset(rootStartOffset)
{
connect(m_originalModifier, &TextModifier::textChanged,
this, &ComponentTextModifier::handleOriginalTextChanged);
connect(m_originalModifier, &TextModifier::replaced, this, &TextModifier::replaced);
connect(m_originalModifier, &TextModifier::moved, this, &TextModifier::moved);
m_originalText = m_originalModifier->text();
}
ComponentTextModifier::~ComponentTextModifier() = default;
void ComponentTextModifier::replace(int offset, int length, const QString& replacement)
{
m_originalModifier->replace(offset, length, replacement);
}
void ComponentTextModifier::move(const MoveInfo &moveInfo)
{
m_originalModifier->move(moveInfo);
}
void ComponentTextModifier::indent(int offset, int length)
{
int componentStartLine = getLineInDocument(m_originalModifier->textDocument(), m_componentStartOffset);
int componentEndLine = getLineInDocument(m_originalModifier->textDocument(), m_componentEndOffset);
/* Do not indent lines that contain code of the component and the surrounding QML.
* example:
* delegate: Item { //startLine
* ...
* } // endLine
* Indenting such lines will change the offsets of the component.
*/
--componentStartLine;
--componentEndLine;
int startLine = getLineInDocument(m_originalModifier->textDocument(), offset);
int endLine = getLineInDocument(m_originalModifier->textDocument(), offset + length);
if (startLine < componentStartLine)
startLine = componentStartLine;
if (endLine > componentEndLine)
endLine = componentEndLine;
indentLines(startLine, endLine);
}
void ComponentTextModifier::indentLines(int startLine, int endLine)
{
m_originalModifier->indentLines(startLine, endLine);
}
TextEditor::TabSettings ComponentTextModifier::tabSettings() const
{
return m_originalModifier->tabSettings();
}
void ComponentTextModifier::startGroup()
{
m_originalModifier->startGroup();
m_startLength = m_originalModifier->text().length();
}
void ComponentTextModifier::flushGroup()
{
m_originalModifier->flushGroup();
int textLength = m_originalModifier->text().length();
m_componentEndOffset += (textLength - m_startLength);
m_startLength = textLength;
}
void ComponentTextModifier::commitGroup()
{
m_originalModifier->commitGroup();
m_originalText = m_originalModifier->text();
int textLength = m_originalText.length();
m_componentEndOffset += (textLength - m_startLength);
m_startLength = textLength;
}
QTextDocument *ComponentTextModifier::textDocument() const
{
return m_originalModifier->textDocument();
}
QString ComponentTextModifier::text() const
{
if (m_componentStartOffset == -1)
return {};
QString txt(m_originalModifier->text());
const int leader = m_componentStartOffset - m_rootStartOffset;
txt.replace(m_rootStartOffset, leader, QString(leader, QLatin1Char(' ')));
const int textLength = txt.size();
const int trailer = textLength - m_componentEndOffset;
txt.replace(m_componentEndOffset, trailer, QString(trailer, QLatin1Char(' ')));
return txt;
}
QTextCursor ComponentTextModifier::textCursor() const
{
return m_originalModifier->textCursor();
}
void ComponentTextModifier::deactivateChangeSignals()
{
m_originalModifier->deactivateChangeSignals();
}
void ComponentTextModifier::reactivateChangeSignals()
{
m_originalModifier->reactivateChangeSignals();
}
void ComponentTextModifier::handleOriginalTextChanged()
{
// Update offsets when original text changes, if necessary
const QString currentText = m_originalModifier->text();
const int oldLen = m_originalText.size();
const int newLen = currentText.size();
if (oldLen != newLen) {
int newSpace = 0;
int oldSpace = 0;
int newIdx = 0;
int nonWhiteSpaceChangeIdx = -1;
int newStartOffset = m_componentStartOffset;
// Adjust for removal/addition of whitespace in the document.
// Whitespace changes that happen when document is saved can be spread around throughout
// the entire document in multiple places.
// Check that non-whitespace portion of the text is the same and count the whitespace diff
for (int oldIdx = 0; oldIdx < oldLen; ++oldIdx) {
const QChar oldChar = m_originalText[oldIdx];
if (oldIdx == m_componentStartOffset)
newStartOffset += newSpace - oldSpace;
if (oldIdx == m_componentEndOffset) {
m_componentEndOffset += newSpace - oldSpace;
m_componentStartOffset = newStartOffset;
m_originalText = currentText;
break;
}
while (newIdx < newLen && currentText[newIdx].isSpace()) {
++newSpace;
++newIdx;
}
if (oldChar.isSpace()) {
++oldSpace;
continue;
}
if (currentText[newIdx] != oldChar) {
nonWhiteSpaceChangeIdx = oldIdx;
// A non-whitespace change is a result of manual text edit or undo/redo operation.
// Assumption is that separate whitespace changes and a non-whitespace change can't
// both happen simultaneously, so break out of whitespace check loop.
break;
} else {
++newIdx;
}
}
if (nonWhiteSpaceChangeIdx >= 0) {
// For non-whitespace change, we assume the whole change is either before the component
// or inside the component. If the change spans both, it's likely the change is
// invalid anyway, and we don't care about trying to keep offsets up to date.
int diff = newLen - oldLen;
if (nonWhiteSpaceChangeIdx < m_componentEndOffset)
m_componentEndOffset += diff;
if (nonWhiteSpaceChangeIdx < m_componentStartOffset)
m_componentStartOffset += diff;
m_originalText = currentText;
}
}
emit textChanged();
}
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