475 lines
13 KiB
C++
475 lines
13 KiB
C++
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/*
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* Copyright (C) 2015 Jolla Ltd.
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* Contact: Slava Monich <slava.monich@jolla.com>
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*
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* You may use this file under the terms of the BSD license as follows:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Nemo Mobile nor the names of its contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "BooksPageWidget.h"
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#include "BooksTextStyle.h"
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#include "BooksDefs.h"
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#include "HarbourDebug.h"
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#include <QPainter>
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// ==========================================================================
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// BooksPageWidget::Data
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// ==========================================================================
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class BooksPageWidget::Data {
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public:
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Data(shared_ptr<ZLTextModel> aModel, int aWidth, int aHeight) :
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iModel(aModel), iPaintContext(aWidth, aHeight) {}
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bool paint(QPainter* aPainter);
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public:
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shared_ptr<ZLView> iView;
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shared_ptr<ZLTextModel> iModel;
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BooksPaintContext iPaintContext;
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};
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bool BooksPageWidget::Data::paint(QPainter* aPainter)
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{
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if (!iView.isNull()) {
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iPaintContext.beginPaint(aPainter);
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iView->paint();
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iPaintContext.endPaint();
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return true;
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}
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return false;
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}
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// ==========================================================================
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// BooksPageWidget::ResetTask
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// ==========================================================================
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class BooksPageWidget::ResetTask : public BooksTask
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{
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public:
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ResetTask(shared_ptr<ZLTextModel> aModel,
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shared_ptr<ZLTextStyle> aTextStyle, int aWidth, int aHeight,
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const BooksMargins& aMargins, const BooksPos& aPosition);
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~ResetTask();
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void performTask();
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public:
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BooksPageWidget::Data* iData;
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shared_ptr<ZLTextStyle> iTextStyle;
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BooksMargins iMargins;
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BooksPos iPosition;
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};
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BooksPageWidget::ResetTask::ResetTask(shared_ptr<ZLTextModel> aModel,
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shared_ptr<ZLTextStyle> aTextStyle, int aWidth, int aHeight,
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const BooksMargins& aMargins, const BooksPos& aPosition) :
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iData(new BooksPageWidget::Data(aModel, aWidth, aHeight)),
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iTextStyle(aTextStyle),
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iMargins(aMargins),
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iPosition(aPosition)
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{
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}
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BooksPageWidget::ResetTask::~ResetTask()
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{
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delete iData;
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}
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void BooksPageWidget::ResetTask::performTask()
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{
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if (!isCanceled()) {
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BooksTextView* view = new BooksTextView(iData->iPaintContext,
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iTextStyle, iMargins);
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if (!isCanceled()) {
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view->setModel(iData->iModel);
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if (!isCanceled()) {
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view->gotoPosition(iPosition);
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if (!isCanceled()) {
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iData->iView = view;
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} else {
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delete view;
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}
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}
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}
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}
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}
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// ==========================================================================
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// BooksPageWidget::RenderTask
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// ==========================================================================
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class BooksPageWidget::RenderTask : public BooksTask {
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public:
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RenderTask(shared_ptr<BooksPageWidget::Data> aData, int aWidth, int aHeight) :
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iData(aData), iWidth(aWidth), iHeight(aHeight), iImage(NULL) {}
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void performTask();
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public:
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shared_ptr<BooksPageWidget::Data> iData;
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int iWidth;
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int iHeight;
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shared_ptr<QImage> iImage;
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};
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void BooksPageWidget::RenderTask::performTask()
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{
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if (!isCanceled() && !iData.isNull() && !iData->iView.isNull() &&
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iWidth > 0 && iHeight > 0) {
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iImage = new QImage(iWidth, iHeight, QImage::Format_RGB32);
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if (!isCanceled()) {
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QPainter painter(&*iImage);
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iData->paint(&painter);
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}
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}
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}
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// ==========================================================================
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// BooksPageWidget
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// ==========================================================================
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BooksPageWidget::BooksPageWidget(QQuickItem* aParent) :
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QQuickPaintedItem(aParent),
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iTaskQueue(BooksTaskQueue::instance()),
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iTextStyle(BooksTextStyle::defaults()),
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iResizeTimer(new QTimer(this)),
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iModel(NULL),
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iSettings(NULL),
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iResetTask(NULL),
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iRenderTask(NULL),
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iPaintRequest(false),
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iEmpty(false),
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iPage(-1)
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{
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setFlag(ItemHasContents, true);
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setFillColor(Qt::white);
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iResizeTimer->setSingleShot(true);
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iResizeTimer->setInterval(0);
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connect(iResizeTimer, SIGNAL(timeout()), SLOT(onResizeTimeout()));
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connect(this, SIGNAL(widthChanged()), SLOT(onWidthChanged()));
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connect(this, SIGNAL(heightChanged()), SLOT(onHeightChanged()));
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}
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BooksPageWidget::~BooksPageWidget()
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{
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HDEBUG("page" << iPage);
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if (iResetTask) iResetTask->release(this);
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if (iRenderTask) iRenderTask->release(this);
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}
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void BooksPageWidget::setModel(BooksBookModel* aModel)
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{
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if (iModel != aModel) {
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if (iModel) {
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iModel->disconnect(this);
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iModel = NULL;
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}
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iModel = aModel;
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if (iModel) {
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#if HARBOUR_DEBUG
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if (iPage >= 0) {
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HDEBUG(iModel->title() << iPage);
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} else {
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HDEBUG(iModel->title());
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}
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#endif // HARBOUR_DEBUG
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iPageMark = iModel->pageMark(iPage);
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connect(iModel, SIGNAL(bookModelChanged()),
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SLOT(onBookModelChanged()));
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connect(iModel, SIGNAL(destroyed()),
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SLOT(onBookModelDestroyed()));
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connect(iModel, SIGNAL(pageMarksChanged()),
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SLOT(onBookModelPageMarksChanged()));
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connect(iModel, SIGNAL(loadingChanged()),
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SLOT(onBookModelLoadingChanged()));
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} else {
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iPageMark.invalidate();
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}
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resetView();
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Q_EMIT modelChanged();
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}
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}
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void BooksPageWidget::setSettings(BooksSettings* aSettings)
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{
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if (iSettings != aSettings) {
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shared_ptr<ZLTextStyle> oldTextStyle(iTextStyle);
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if (iSettings) iSettings->disconnect(this);
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iSettings = aSettings;
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if (iSettings) {
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iTextStyle = iSettings->textStyle();
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connect(iSettings, SIGNAL(textStyleChanged()), SLOT(onTextStyleChanged()));
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} else {
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iTextStyle = BooksTextStyle::defaults();
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}
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if (!BooksTextStyle::equalLayout(oldTextStyle, iTextStyle)) {
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resetView();
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}
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Q_EMIT settingsChanged();
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}
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}
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void BooksPageWidget::onTextStyleChanged()
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{
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HDEBUG(iPage);
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iTextStyle = iSettings->textStyle();
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resetView();
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}
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void BooksPageWidget::onBookModelChanged()
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{
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HDEBUG(iModel->title());
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BooksLoadingSignalBlocker block(this);
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iPageMark = iModel->pageMark(iPage);
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resetView();
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}
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void BooksPageWidget::onBookModelDestroyed()
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{
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HDEBUG("model destroyed");
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HASSERT(iModel == sender());
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BooksLoadingSignalBlocker block(this);
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iModel = NULL;
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Q_EMIT modelChanged();
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resetView();
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}
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void BooksPageWidget::onBookModelPageMarksChanged()
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{
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const BooksPos pos = iModel->pageMark(iPage);
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if (iPageMark != pos) {
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BooksLoadingSignalBlocker block(this);
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iPageMark = pos;
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HDEBUG("page" << iPage);
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resetView();
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}
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}
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void BooksPageWidget::onBookModelLoadingChanged()
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{
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BooksLoadingSignalBlocker block(this);
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if (!iModel->loading()) {
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HDEBUG("page" << iPage);
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const BooksPos pos = iModel->pageMark(iPage);
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if (iPageMark != pos) {
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iPageMark = pos;
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resetView();
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}
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}
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}
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void BooksPageWidget::setPage(int aPage)
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{
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if (iPage != aPage) {
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BooksLoadingSignalBlocker block(this);
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iPage = aPage;
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HDEBUG(iPage);
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const BooksPos pos = iModel->pageMark(iPage);
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if (iPageMark != pos) {
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iPageMark = pos;
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resetView();
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}
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resetView();
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Q_EMIT pageChanged();
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}
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}
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void BooksPageWidget::setLeftMargin(int aMargin)
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{
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if (iMargins.iLeft != aMargin) {
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iMargins.iLeft = aMargin;
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HDEBUG(aMargin);
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resetView();
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Q_EMIT leftMarginChanged();
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}
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}
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void BooksPageWidget::setRightMargin(int aMargin)
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{
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if (iMargins.iRight != aMargin) {
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iMargins.iRight = aMargin;
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HDEBUG(aMargin);
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resetView();
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Q_EMIT rightMarginChanged();
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}
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}
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void BooksPageWidget::setTopMargin(int aMargin)
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{
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if (iMargins.iTop != aMargin) {
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iMargins.iTop = aMargin;
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HDEBUG(aMargin);
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resetView();
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Q_EMIT topMarginChanged();
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}
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}
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void BooksPageWidget::setBottomMargin(int aMargin)
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{
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if (iMargins.iBottom != aMargin) {
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iMargins.iBottom = aMargin;
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HDEBUG(aMargin);
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resetView();
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Q_EMIT bottomMarginChanged();
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}
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}
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void BooksPageWidget::paint(QPainter* aPainter)
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{
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if (!iImage.isNull()) {
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HDEBUG("page" << iPage);
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aPainter->drawImage(0, 0, *iImage);
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iEmpty = false;
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} else if (iPage >= 0 && iPageMark.valid()) {
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if (!iPaintRequest) {
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iPaintRequest = true;
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HDEBUG("page" << iPage << "(scheduled)");
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scheduleRepaint();
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} else {
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HDEBUG("page" << iPage << "(not yet ready)");
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}
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iEmpty = true;
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} else {
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HDEBUG("page" << iPage << "(empty)");
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iEmpty = true;
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}
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}
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bool BooksPageWidget::loading() const
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{
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return iPage >= 0 && iResetTask && iRenderTask;
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}
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void BooksPageWidget::resetView()
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{
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BooksLoadingSignalBlocker block(this);
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if (iResetTask) {
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iResetTask->release(this);
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iResetTask = NULL;
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}
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iData.reset();
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if (iPage >= 0 && iPageMark.valid() &&
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width() > 0 && height() > 0 && iModel) {
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shared_ptr<ZLTextModel> textModel = iModel->bookTextModel();
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if (!textModel.isNull()) {
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iResetTask = new ResetTask(textModel, iTextStyle,
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width(), height(), iMargins, iPageMark);
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iTaskQueue->submit(iResetTask, this, SLOT(onResetTaskDone()));
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cancelRepaint();
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}
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}
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if (!iResetTask && !iEmpty) {
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update();
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}
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}
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void BooksPageWidget::cancelRepaint()
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{
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BooksLoadingSignalBlocker block(this);
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if (iRenderTask) {
|
||
|
|
iRenderTask->release(this);
|
||
|
|
iRenderTask = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void BooksPageWidget::scheduleRepaint()
|
||
|
|
{
|
||
|
|
BooksLoadingSignalBlocker block(this);
|
||
|
|
cancelRepaint();
|
||
|
|
if (width() > 0 && height() > 0 && !iData.isNull()) {
|
||
|
|
iRenderTask = new RenderTask(iData, width(), height());
|
||
|
|
iTaskQueue->submit(iRenderTask, this, SLOT(onRenderTaskDone()));
|
||
|
|
} else {
|
||
|
|
update();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void BooksPageWidget::onResetTaskDone()
|
||
|
|
{
|
||
|
|
BooksLoadingSignalBlocker block(this);
|
||
|
|
HASSERT(sender() == iResetTask);
|
||
|
|
iData = iResetTask->iData;
|
||
|
|
iResetTask->iData = NULL;
|
||
|
|
iResetTask->release(this);
|
||
|
|
iResetTask = NULL;
|
||
|
|
if (iPaintRequest) {
|
||
|
|
scheduleRepaint();
|
||
|
|
} else {
|
||
|
|
update();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void BooksPageWidget::onRenderTaskDone()
|
||
|
|
{
|
||
|
|
BooksLoadingSignalBlocker block(this);
|
||
|
|
HASSERT(sender() == iRenderTask);
|
||
|
|
iImage = iRenderTask->iImage;
|
||
|
|
iRenderTask->release(this);
|
||
|
|
iRenderTask = NULL;
|
||
|
|
iPaintRequest = false;
|
||
|
|
update();
|
||
|
|
}
|
||
|
|
|
||
|
|
void BooksPageWidget::updateSize()
|
||
|
|
{
|
||
|
|
HDEBUG(QSize(width(), height()));
|
||
|
|
resetView();
|
||
|
|
}
|
||
|
|
|
||
|
|
void BooksPageWidget::onWidthChanged()
|
||
|
|
{
|
||
|
|
const int w = width();
|
||
|
|
HDEBUG(w);
|
||
|
|
// Width change will probably be followed by height change
|
||
|
|
iResizeTimer->start();
|
||
|
|
}
|
||
|
|
|
||
|
|
void BooksPageWidget::onHeightChanged()
|
||
|
|
{
|
||
|
|
const int h = height();
|
||
|
|
HDEBUG(h);
|
||
|
|
if (iResizeTimer->isActive()) {
|
||
|
|
// Height is usually changed after width, repaint right away
|
||
|
|
iResizeTimer->stop();
|
||
|
|
updateSize();
|
||
|
|
} else {
|
||
|
|
iResizeTimer->start();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void BooksPageWidget::onResizeTimeout()
|
||
|
|
{
|
||
|
|
// This can only happen if only width or height has changed. Normally,
|
||
|
|
// width change is followed by height change and view is reset from the
|
||
|
|
// setHeight() method
|
||
|
|
updateSize();
|
||
|
|
}
|