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/****************************************************************************
**
** Copyright (C) 2016 Marc Reilly <marc.reilly+qtc@gmail.com>
** 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 "resourcepreviewhoverhandler.h"
#include <coreplugin/icore.h>
#include <utils/tooltip/tooltip.h>
#include <utils/fileutils.h>
#include <utils/qtcassert.h>
#include <utils/mimetypes/mimedatabase.h>
#include <projectexplorer/projecttree.h>
#include <projectexplorer/project.h>
#include <texteditor/texteditor.h>
#include <QPoint>
#include <QTextBlock>
using namespace Core;
using namespace TextEditor;
namespace CppEditor {
namespace Internal {
/*
* finds a quoted sub-string around the pos in the given string
*
* note: the returned string includes the quotes.
*/
static QString extractQuotedString(const QString &s, int pos)
{
if (s.length() < 2 || pos < 0 || pos >= s.length())
return QString();
const int firstQuote = s.lastIndexOf('"', pos);
if (firstQuote >= 0) {
int endQuote = s.indexOf('"', firstQuote + 1);
if (endQuote > firstQuote)
return s.mid(firstQuote, endQuote - firstQuote);
}
return QString();
}
static QString makeResourcePath(const QStringList &prefixList, const QString &file)
{
QTC_ASSERT(!prefixList.isEmpty(), return QString());
const QChar sep = '/';
auto prefix = prefixList.join(sep);
if (prefix == sep)
return prefix + file;
return prefix + sep + file;
}
/*
* tries to match a resource within a given .qrc file, including by alias
*
* note: resource name should not have any semi-colon in front of it
*/
static QString findResourceInFile(const QString &resName, const QString &filePathName)
{
Utils::FileReader reader;
if (!reader.fetch(filePathName))
return QString();
const QByteArray contents = reader.data();
QXmlStreamReader xmlr(contents);
QStringList prefixStack;
while (!xmlr.atEnd() && !xmlr.hasError()) {
const QXmlStreamReader::TokenType token = xmlr.readNext();
if (token == QXmlStreamReader::StartElement) {
if (xmlr.name() == "qresource") {
const QXmlStreamAttributes sa = xmlr.attributes();
const QString prefixName = sa.value("prefix").toString();
if (!prefixName.isEmpty())
prefixStack.push_back(prefixName);
} else if (xmlr.name() == "file") {
const QXmlStreamAttributes sa = xmlr.attributes();
const QString aliasName = sa.value("alias").toString();
const QString fileName = xmlr.readElementText();
if (!aliasName.isEmpty()) {
const QString fullAliasName = makeResourcePath(prefixStack, aliasName);
if (resName == fullAliasName)
return fileName;
}
const QString fullResName = makeResourcePath(prefixStack, fileName);
if (resName == fullResName)
return fileName;
}
} else if (token == QXmlStreamReader::EndElement) {
if (xmlr.name() == "qresource") {
if (!prefixStack.isEmpty())
prefixStack.pop_back();
}
}
}
return QString();
}
/*
* A more efficient way to do this would be to parse the relevant project files
* before hand, or cache them as we go - but this works well enough so far.
*/
static QString findResourceInProject(const QString &resName)
{
QString s = resName;
s.remove('"');
if (s.startsWith(":/"))
s.remove(0, 1);
else if (s.startsWith("qrc://"))
s.remove(0, 5);
else
return QString();
if (auto *project = ProjectExplorer::ProjectTree::currentProject()) {
const QStringList files = project->files(ProjectExplorer::Project::AllFiles);
for (const QString &file : files) {
if (!file.endsWith(".qrc"))
continue;
const QFileInfo fi(file);
if (!fi.isReadable())
continue;
const QString fileName = findResourceInFile(s, file);
if (fileName.isEmpty())
continue;
QString ret = fi.absolutePath();
if (!ret.endsWith('/'))
ret.append('/');
ret.append(fileName);
return ret;
}
}
return QString();
}
void ResourcePreviewHoverHandler::identifyMatch(TextEditorWidget *editorWidget, int pos)
{
if (editorWidget->extraSelectionTooltip(pos).isEmpty()) {
const QTextBlock tb = editorWidget->document()->findBlock(pos);
const int tbpos = pos - tb.position();
const QString tbtext = tb.text();
const QString resPath = extractQuotedString(tbtext, tbpos);
m_resPath = findResourceInProject(resPath);
setPriority(m_resPath.isEmpty() ? Priority_None : Priority_Diagnostic + 1);
}
}
void ResourcePreviewHoverHandler::operateTooltip(TextEditorWidget *editorWidget, const QPoint &point)
{
const QString tt = makeTooltip();
if (!tt.isEmpty())
Utils::ToolTip::show(point, tt, editorWidget);
else
Utils::ToolTip::hide();
}
QString ResourcePreviewHoverHandler::makeTooltip() const
{
if (m_resPath.isEmpty())
return QString();
QString ret;
const Utils::MimeType mimeType = Utils::mimeTypeForFile(m_resPath);
if (mimeType.isValid()) {
if (mimeType.name().startsWith("image", Qt::CaseInsensitive))
ret += QString("<img src=\"file:///%1\" /><br/>").arg(m_resPath);
ret += QString("<a href=\"file:///%1\">%2</a>")
.arg(m_resPath)
.arg(QDir::toNativeSeparators(m_resPath));
}
return ret;
}
} // namespace Internal
} // namespace CppEditor
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