745 lines
22 KiB
C++
745 lines
22 KiB
C++
/*
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* Copyright 2006-2007 Aaron Seigo <aseigo@kde.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "svg.h"
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#include <cmath>
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#include <QDir>
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#include <QDomDocument>
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#include <QMatrix>
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#include <QPainter>
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#include <QSharedData>
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#include <QStringBuilder>
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#include <QSvgRenderer>
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#include <kcolorscheme.h>
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#include <kconfiggroup.h>
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#include <kdebug.h>
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#include <kfilterdev.h>
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#include <kiconeffect.h>
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#include <kglobalsettings.h>
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#include <ksharedptr.h>
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#include "applet.h"
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#include "package.h"
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#include "theme.h"
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namespace Plasma
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{
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class SharedSvgRenderer : public QSvgRenderer, public QSharedData
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{
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public:
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typedef KSharedPtr<SharedSvgRenderer> Ptr;
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SharedSvgRenderer(QObject *parent = 0)
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: QSvgRenderer(parent)
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{}
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SharedSvgRenderer(const QString &filename, const QString &styleSheet, QObject *parent = 0);
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SharedSvgRenderer(const QByteArray &contents, const QString &styleSheet, QObject *parent = 0);
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~SharedSvgRenderer()
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{
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//kDebug() << "leaving this world for a better one.";
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}
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private:
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bool load(const QByteArray &contents, const QString &styleSheet);
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};
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SharedSvgRenderer::SharedSvgRenderer(const QString &filename, const QString &styleSheet, QObject *parent)
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: QSvgRenderer(parent)
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{
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QIODevice *file = KFilterDev::deviceForFile(filename, "application/x-gzip");
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if (!file->open(QIODevice::ReadOnly)) {
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delete file;
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return;
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}
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load(file->readAll(), styleSheet);
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delete file;
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}
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SharedSvgRenderer::SharedSvgRenderer(const QByteArray &contents, const QString &styleSheet, QObject *parent)
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: QSvgRenderer(parent)
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{
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load(contents, styleSheet);
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}
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bool SharedSvgRenderer::load(const QByteArray &contents, const QString &styleSheet)
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{
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if (styleSheet.isEmpty() || ! contents.contains("current-color-scheme")) {
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return QSvgRenderer::load(contents);
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}
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QDomDocument svg;
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if (!svg.setContent(contents)) {
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return false;
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}
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QDomNode defs = svg.elementsByTagName("defs").item(0);
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for (QDomElement style = defs.firstChildElement("style"); !style.isNull();
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style = style.nextSiblingElement("style")) {
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if (style.attribute("id") != "current-color-scheme") {
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continue;
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}
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QDomElement colorScheme = svg.createElement("style");
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colorScheme.setAttribute("type", "text/css");
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colorScheme.setAttribute("id", "current-color-scheme");
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defs.replaceChild(colorScheme, style);
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colorScheme.appendChild(svg.createCDATASection(styleSheet));
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break;
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}
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return QSvgRenderer::load(svg.toByteArray(-1));
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}
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#define QLSEP QLatin1Char('_')
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#define CACHE_ID_WITH_SIZE(size, id) QString::number(int(size.width())) % QString::number(int(size.height())) % QLSEP % id
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class SvgPrivate
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{
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public:
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SvgPrivate(Svg *svg)
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: q(svg),
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renderer(0),
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styleCrc(0),
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lastModified(0),
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multipleImages(false),
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themed(false),
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applyColors(false),
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usesColors(false),
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cacheRendering(true),
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themeFailed(false)
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{
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}
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~SvgPrivate()
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{
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eraseRenderer();
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}
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//This function is meant for the rects cache
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QString cacheId(const QString &elementId)
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{
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if (size.isValid() && size != naturalSize) {
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return CACHE_ID_WITH_SIZE(size, elementId);
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} else {
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return QLatin1Literal("Natural") % QLSEP % elementId;
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}
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}
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//This function is meant for the pixmap cache
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QString cachePath(const QString &path, const QSize &size)
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{
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return CACHE_ID_WITH_SIZE(size, path);
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}
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bool setImagePath(const QString &imagePath)
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{
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bool isThemed = !QDir::isAbsolutePath(imagePath);
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// lets check to see if we're already set to this file
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if (isThemed == themed &&
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((themed && themePath == imagePath) ||
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(!themed && path == imagePath))) {
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return false;
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}
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// if we don't have any path right now and are going to set one,
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// then lets not schedule a repaint because we are just initializing!
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bool updateNeeded = true; //!path.isEmpty() || !themePath.isEmpty();
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if (themed) {
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QObject::disconnect(actualTheme(), SIGNAL(themeChanged()),
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q, SLOT(themeChanged()));
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}
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themed = isThemed;
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path.clear();
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themePath.clear();
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localRectCache.clear();
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if (themed) {
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themePath = imagePath;
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themeFailed = false;
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QObject::connect(actualTheme(), SIGNAL(themeChanged()), q, SLOT(themeChanged()));
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} else if (QFile::exists(imagePath)) {
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path = imagePath;
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} else {
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kDebug() << "file '" << path << "' does not exist!";
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}
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// check if svg wants colorscheme applied
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QObject::disconnect(KGlobalSettings::self(), SIGNAL(kdisplayPaletteChanged()),
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q, SLOT(colorsChanged()));
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checkColorHints();
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if (usesColors && !actualTheme()->colorScheme()) {
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QObject::connect(KGlobalSettings::self(), SIGNAL(kdisplayPaletteChanged()),
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q, SLOT(colorsChanged()));
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}
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// also images with absolute path needs to have a natural size initialized,
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// even if looks a bit weird using Theme to store non-themed stuff
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if (themed || QFile::exists(imagePath)) {
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QRectF rect;
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bool found = actualTheme()->findInRectsCache(path, "_Natural", rect);
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if (!found) {
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createRenderer();
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naturalSize = renderer->defaultSize();
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//kDebug() << "natural size for" << path << "from renderer is" << naturalSize;
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actualTheme()->insertIntoRectsCache(path, "_Natural", QRectF(QPointF(0,0), naturalSize));
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} else {
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naturalSize = rect.size();
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//kDebug() << "natural size for" << path << "from cache is" << naturalSize;
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}
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}
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if (!themed) {
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QFile f(imagePath);
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QFileInfo info(f);
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lastModified = info.lastModified().toTime_t();
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}
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return updateNeeded;
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}
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Theme *actualTheme()
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{
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if (!theme) {
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theme = Plasma::Theme::defaultTheme();
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}
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return theme.data();
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}
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QPixmap findInCache(const QString &elementId, const QSizeF &s = QSizeF())
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{
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QSize size;
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QString actualElementId(CACHE_ID_WITH_SIZE(s, elementId));
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if (elementId.isEmpty() || !q->hasElement(actualElementId)) {
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actualElementId = elementId;
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}
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if (elementId.isEmpty() || (multipleImages && s.isValid())) {
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size = s.toSize();
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} else {
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size = elementRect(actualElementId).size().toSize();
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}
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if (size.isEmpty()) {
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return QPixmap();
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}
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QString id = cachePath(path, size);
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if (!actualElementId.isEmpty()) {
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id.append(actualElementId);
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}
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//kDebug() << "id is " << id;
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QPixmap p;
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if (cacheRendering) {
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if (actualTheme()->findInCache(id, p, lastModified)) {
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//kDebug() << "found cached version of " << id << p.size();
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return p;
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}
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}
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//kDebug() << "didn't find cached version of " << id << ", so re-rendering";
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//kDebug() << "size for " << actualElementId << " is " << s;
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// we have to re-render this puppy
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createRenderer();
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QRectF finalRect = makeUniform(renderer->boundsOnElement(actualElementId), QRect(QPoint(0,0), size));
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//don't alter the pixmap size or it won't match up properly to, e.g., FrameSvg elements
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//makeUniform should never change the size so much that it gains or loses a whole pixel
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p = QPixmap(size);
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p.fill(Qt::transparent);
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QPainter renderPainter(&p);
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if (actualElementId.isEmpty()) {
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renderer->render(&renderPainter, finalRect);
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} else {
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renderer->render(&renderPainter, actualElementId, finalRect);
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}
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renderPainter.end();
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// Apply current color scheme if the svg asks for it
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if (applyColors) {
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QImage itmp = p.toImage();
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KIconEffect::colorize(itmp, actualTheme()->color(Theme::BackgroundColor), 1.0);
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p = p.fromImage(itmp);
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}
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if (cacheRendering) {
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actualTheme()->insertIntoCache(id, p, QString::number((qint64)q, 16) % QLSEP % actualElementId);
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}
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return p;
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}
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void createRenderer()
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{
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if (renderer) {
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return;
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}
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//kDebug() << kBacktrace();
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if (themed && path.isEmpty() && !themeFailed) {
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Applet *applet = qobject_cast<Applet*>(q->parent());
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if (applet && applet->package()) {
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path = applet->package()->filePath("images", themePath + ".svg");
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if (path.isEmpty()) {
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path = applet->package()->filePath("images", themePath + ".svgz");
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}
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}
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if (path.isEmpty()) {
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path = actualTheme()->imagePath(themePath);
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themeFailed = path.isEmpty();
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if (themeFailed) {
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kWarning() << "No image path found for" << themePath;
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}
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}
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}
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//kDebug() << "********************************";
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//kDebug() << "FAIL! **************************";
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//kDebug() << path << "**";
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QByteArray styleSheet = actualTheme()->styleSheet("SVG").toUtf8();
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styleCrc = qChecksum(styleSheet, styleSheet.size());
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QHash<QString, SharedSvgRenderer::Ptr>::const_iterator it = s_renderers.constFind(styleCrc + path);
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if (it != s_renderers.constEnd()) {
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//kDebug() << "gots us an existing one!";
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renderer = it.value();
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} else {
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if (path.isEmpty()) {
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renderer = new SharedSvgRenderer();
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} else {
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renderer = new SharedSvgRenderer(path, actualTheme()->styleSheet("SVG"));
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}
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s_renderers[styleCrc + path] = renderer;
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}
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if (size == QSizeF()) {
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size = renderer->defaultSize();
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}
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}
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void eraseRenderer()
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{
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if (renderer && renderer.count() == 2) {
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// this and the cache reference it
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s_renderers.erase(s_renderers.find(styleCrc + path));
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if (theme) {
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theme.data()->releaseRectsCache(path);
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}
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}
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renderer = 0;
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styleCrc = 0;
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localRectCache.clear();
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}
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QRectF elementRect(const QString &elementId)
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{
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if (themed && path.isEmpty()) {
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if (themeFailed) {
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return QRectF();
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}
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path = actualTheme()->imagePath(themePath);
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themeFailed = path.isEmpty();
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if (themeFailed) {
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return QRectF();
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}
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}
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QString id = cacheId(elementId);
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if (localRectCache.contains(id)) {
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return localRectCache.value(id);
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}
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QRectF rect;
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bool found = actualTheme()->findInRectsCache(path, id, rect);
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if (found) {
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localRectCache.insert(id, rect);
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return rect;
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}
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return findAndCacheElementRect(elementId);
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}
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QRectF findAndCacheElementRect(const QString &elementId)
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{
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createRenderer();
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QRectF elementRect = renderer->elementExists(elementId) ?
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renderer->boundsOnElement(elementId) : QRectF();
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naturalSize = renderer->defaultSize();
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//kDebug() << "natural size for" << path << "is" << naturalSize;
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qreal dx = size.width() / naturalSize.width();
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qreal dy = size.height() / naturalSize.height();
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elementRect = QRectF(elementRect.x() * dx, elementRect.y() * dy,
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elementRect.width() * dx, elementRect.height() * dy);
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actualTheme()->insertIntoRectsCache(path, cacheId(elementId), elementRect);
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return elementRect;
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}
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QMatrix matrixForElement(const QString &elementId)
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{
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createRenderer();
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return renderer->matrixForElement(elementId);
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}
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void checkColorHints()
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{
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if (elementRect("hint-apply-color-scheme").isValid()) {
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applyColors = true;
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usesColors = true;
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} else if (elementRect("current-color-scheme").isValid()) {
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applyColors = false;
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usesColors = true;
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} else {
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applyColors = false;
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usesColors = false;
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}
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}
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//Folowing two are utility functions to snap rendered elements to the pixel grid
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//to and from are always 0 <= val <= 1
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qreal closestDistance(qreal to, qreal from)
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{
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qreal a = to - from;
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if (qFuzzyCompare(to, from))
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return 0;
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else if ( to > from ) {
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qreal b = to - from - 1;
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return (qAbs(a) > qAbs(b)) ? b : a;
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} else {
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qreal b = 1 + to - from;
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return (qAbs(a) > qAbs(b)) ? b : a;
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}
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}
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QRectF makeUniform(const QRectF &orig, const QRectF &dst)
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{
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if (qFuzzyIsNull(orig.x()) || qFuzzyIsNull(orig.y())) {
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return dst;
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}
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QRectF res(dst);
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qreal div_w = dst.width() / orig.width();
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qreal div_h = dst.height() / orig.height();
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qreal div_x = dst.x() / orig.x();
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qreal div_y = dst.y() / orig.y();
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//horizontal snap
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if (!qFuzzyIsNull(div_x) && !qFuzzyCompare(div_w, div_x)) {
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qreal rem_orig = orig.x() - (floor(orig.x()));
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qreal rem_dst = dst.x() - (floor(dst.x()));
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qreal offset = closestDistance(rem_dst, rem_orig);
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res.translate(offset + offset*div_w, 0);
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res.setWidth(res.width() + offset);
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}
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//vertical snap
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if (!qFuzzyIsNull(div_y) && !qFuzzyCompare(div_h, div_y)) {
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qreal rem_orig = orig.y() - (floor(orig.y()));
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qreal rem_dst = dst.y() - (floor(dst.y()));
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qreal offset = closestDistance(rem_dst, rem_orig);
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res.translate(0, offset + offset*div_h);
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res.setHeight(res.height() + offset);
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}
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//kDebug()<<"Aligning Rects, origin:"<<orig<<"destination:"<<dst<<"result:"<<res;
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return res;
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}
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//Slots
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void themeChanged()
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{
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// check if new theme svg wants colorscheme applied
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bool wasUsesColors = usesColors;
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checkColorHints();
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if (usesColors && actualTheme()->colorScheme()) {
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if (!wasUsesColors) {
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QObject::connect(KGlobalSettings::self(), SIGNAL(kdisplayPaletteChanged()),
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q, SLOT(colorsChanged()));
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}
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} else {
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QObject::disconnect(KGlobalSettings::self(), SIGNAL(kdisplayPaletteChanged()),
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q, SLOT(colorsChanged()));
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}
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if (!themed) {
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return;
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}
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QString currentPath = themePath;
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themePath.clear();
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eraseRenderer();
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setImagePath(currentPath);
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//kDebug() << themePath << ">>>>>>>>>>>>>>>>>> theme changed";
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emit q->repaintNeeded();
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}
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void colorsChanged()
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{
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if (!usesColors) {
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return;
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}
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eraseRenderer();
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//kDebug() << "repaint needed from colorsChanged";
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emit q->repaintNeeded();
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}
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static QHash<QString, SharedSvgRenderer::Ptr> s_renderers;
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Svg *q;
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QWeakPointer<Theme> theme;
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QHash<QString, QRectF> localRectCache;
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SharedSvgRenderer::Ptr renderer;
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QString themePath;
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QString path;
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QSizeF size;
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QSizeF naturalSize;
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QChar styleCrc;
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unsigned int lastModified;
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bool multipleImages : 1;
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bool themed : 1;
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bool applyColors : 1;
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bool usesColors : 1;
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bool cacheRendering : 1;
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bool themeFailed : 1;
|
|
};
|
|
|
|
QHash<QString, SharedSvgRenderer::Ptr> SvgPrivate::s_renderers;
|
|
|
|
Svg::Svg(QObject *parent)
|
|
: QObject(parent),
|
|
d(new SvgPrivate(this))
|
|
{
|
|
}
|
|
|
|
Svg::~Svg()
|
|
{
|
|
delete d;
|
|
}
|
|
|
|
QPixmap Svg::pixmap(const QString &elementID)
|
|
{
|
|
if (elementID.isNull() || d->multipleImages) {
|
|
return d->findInCache(elementID, size());
|
|
} else {
|
|
return d->findInCache(elementID);
|
|
}
|
|
}
|
|
|
|
void Svg::paint(QPainter *painter, const QPointF &point, const QString &elementID)
|
|
{
|
|
QPixmap pix((elementID.isNull() || d->multipleImages) ? d->findInCache(elementID, size()) :
|
|
d->findInCache(elementID));
|
|
|
|
if (pix.isNull()) {
|
|
return;
|
|
}
|
|
|
|
painter->drawPixmap(QRectF(point, pix.size()), pix, QRectF(QPointF(0, 0), pix.size()));
|
|
}
|
|
|
|
void Svg::paint(QPainter *painter, int x, int y, const QString &elementID)
|
|
{
|
|
paint(painter, QPointF(x, y), elementID);
|
|
}
|
|
|
|
void Svg::paint(QPainter *painter, const QRectF &rect, const QString &elementID)
|
|
{
|
|
QPixmap pix(d->findInCache(elementID, rect.size()));
|
|
painter->drawPixmap(QRectF(rect.topLeft(), pix.size()), pix, QRectF(QPointF(0, 0), pix.size()));
|
|
}
|
|
|
|
void Svg::paint(QPainter *painter, int x, int y, int width, int height, const QString &elementID)
|
|
{
|
|
QPixmap pix(d->findInCache(elementID, QSizeF(width, height)));
|
|
painter->drawPixmap(x, y, pix, 0, 0, pix.size().width(), pix.size().height());
|
|
}
|
|
|
|
QSize Svg::size() const
|
|
{
|
|
if (d->size.isEmpty()) {
|
|
d->size = d->naturalSize;
|
|
}
|
|
|
|
return d->size.toSize();
|
|
}
|
|
|
|
void Svg::resize(qreal width, qreal height)
|
|
{
|
|
resize(QSize(width, height));
|
|
}
|
|
|
|
void Svg::resize(const QSizeF &size)
|
|
{
|
|
if (qFuzzyCompare(size.width(), d->size.width()) &&
|
|
qFuzzyCompare(size.height(), d->size.height())) {
|
|
return;
|
|
}
|
|
|
|
d->size = size;
|
|
d->localRectCache.clear();
|
|
}
|
|
|
|
void Svg::resize()
|
|
{
|
|
if (qFuzzyCompare(d->naturalSize.width(), d->size.width()) &&
|
|
qFuzzyCompare(d->naturalSize.height(), d->size.height())) {
|
|
return;
|
|
}
|
|
|
|
d->size = d->naturalSize;
|
|
d->localRectCache.clear();
|
|
}
|
|
|
|
QSize Svg::elementSize(const QString &elementId) const
|
|
{
|
|
return d->elementRect(elementId).size().toSize();
|
|
}
|
|
|
|
QRectF Svg::elementRect(const QString &elementId) const
|
|
{
|
|
return d->elementRect(elementId);
|
|
}
|
|
|
|
bool Svg::hasElement(const QString &elementId) const
|
|
{
|
|
if (d->path.isNull() && d->themePath.isNull()) {
|
|
return false;
|
|
}
|
|
|
|
return d->elementRect(elementId).isValid();
|
|
}
|
|
|
|
QString Svg::elementAtPoint(const QPoint &point) const
|
|
{
|
|
Q_UNUSED(point)
|
|
|
|
return QString();
|
|
/*
|
|
FIXME: implement when Qt can support us!
|
|
d->createRenderer();
|
|
QSizeF naturalSize = d->renderer->defaultSize();
|
|
qreal dx = d->size.width() / naturalSize.width();
|
|
qreal dy = d->size.height() / naturalSize.height();
|
|
//kDebug() << point << "is really"
|
|
// << QPoint(point.x() *dx, naturalSize.height() - point.y() * dy);
|
|
|
|
return QString(); // d->renderer->elementAtPoint(QPoint(point.x() *dx, naturalSize.height() - point.y() * dy));
|
|
*/
|
|
}
|
|
|
|
bool Svg::isValid() const
|
|
{
|
|
if (d->path.isNull() && d->themePath.isNull()) {
|
|
return false;
|
|
}
|
|
|
|
d->createRenderer();
|
|
return d->renderer->isValid();
|
|
}
|
|
|
|
void Svg::setContainsMultipleImages(bool multiple)
|
|
{
|
|
d->multipleImages = multiple;
|
|
}
|
|
|
|
bool Svg::containsMultipleImages() const
|
|
{
|
|
return d->multipleImages;
|
|
}
|
|
|
|
void Svg::setImagePath(const QString &svgFilePath)
|
|
{
|
|
d->eraseRenderer();
|
|
d->setImagePath(svgFilePath);
|
|
//kDebug() << "repaintNeeded";
|
|
emit repaintNeeded();
|
|
}
|
|
|
|
QString Svg::imagePath() const
|
|
{
|
|
return d->themed ? d->themePath : d->path;
|
|
}
|
|
|
|
void Svg::setUsingRenderingCache(bool useCache)
|
|
{
|
|
d->cacheRendering = useCache;
|
|
}
|
|
|
|
bool Svg::isUsingRenderingCache() const
|
|
{
|
|
return d->cacheRendering;
|
|
}
|
|
|
|
void Svg::setTheme(Plasma::Theme *theme)
|
|
{
|
|
if (d->theme) {
|
|
disconnect(d->theme.data(), 0, this, 0);
|
|
}
|
|
|
|
d->theme = theme;
|
|
if (!imagePath().isEmpty()) {
|
|
QString path = imagePath();
|
|
d->themePath.clear();
|
|
setImagePath(path);
|
|
}
|
|
}
|
|
|
|
Theme *Svg::theme() const
|
|
{
|
|
return d->theme ? d->theme.data() : Theme::defaultTheme();
|
|
}
|
|
|
|
} // Plasma namespace
|
|
|
|
#include "svg.moc"
|
|
|