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/*********************************************************************************
NixNote - An open-source client for the Evernote service.
Copyright (C) 2013 Randy Baumgarte
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
***********************************************************************************/
#include "popplerviewer.h"
#include <QGridLayout>
#include <QHBoxLayout>
#include <QLabel>
#if QT_VERSION < 0x050000
#include <poppler-qt4.h>
#else
#include <poppler-qt5.h>
#endif
#include <QGraphicsPixmapItem>
#include <QImage>
#include <QPushButton>
#include "filters/filterengine.h"
#include <global.h>
extern Global global;
PopplerViewer::PopplerViewer(const QString &mimeType, const QString &reslid, QWidget *parent) :
QWidget(parent)
{
pageLabel = new QLabel(this);
this->mimeType = mimeType;
this->lid = reslid.toInt();
printImageFile = global.fileManager.getTmpDirPath() + QString::number(lid) +QString("-print.png");
QString file = global.fileManager.getDbaDirPath() + reslid +".pdf";
doc = Poppler::Document::load(file);
if (doc == NULL || doc->isLocked())
return;
currentPage = 0;
totalPages = doc->numPages();
FilterCriteria *criteria = global.filterCriteria[global.filterPosition];
searchHits.empty();
QList<QRectF> searchLocations;
if (criteria->isSearchStringSet() && criteria->getSearchString() != "") {
FilterEngine engine;
if (engine.resourceContains(lid, criteria->getSearchString(), &searchHits)) {
pageLabel->setStyleSheet("QLabel { background-color : yellow; }");
findNextPage(searchHits, &searchLocations);
}
}
image = new QImage(doc->page(currentPage)->renderToImage());
QPixmap finalPix = highlightImage();
scene = new QGraphicsScene();
view = new PopplerGraphicsView(scene);
view->filename = file;
item = new QGraphicsPixmapItem(finalPix);
finalPix.save(printImageFile); // This is in case we want to print a note. Otherwise it isn't used.
scene->addItem(item);
view->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Maximum);
QHBoxLayout *buttonLayout = new QHBoxLayout();
pageLabel->setText(tr("Page ") +QString::number(currentPage+1) + QString(tr(" of ") +QString::number(totalPages)));
pageLeft = new QPushButton();
pageRight = new QPushButton();
pageRight->setMaximumWidth(30);
pageLeft->setMaximumWidth(30);
pageLeft->setIcon(global.getIconResource(":leftArrowIcon"));
pageRight->setIcon(global.getIconResource(":rightArrowIcon"));
buttonLayout->addStretch(100);
buttonLayout->addWidget(pageLeft);
buttonLayout->addWidget(pageLabel);
buttonLayout->addWidget(pageRight);
buttonLayout->addStretch(100);
QVBoxLayout *layout = new QVBoxLayout(this);
layout->addLayout(buttonLayout);
layout->addWidget(view);
this->setLayout(layout);
connect(pageRight, SIGNAL(clicked()), this, SLOT(pageRightPressed()));
connect(pageLeft, SIGNAL(clicked()), this, SLOT(pageLeftPressed()));
if (totalPages == 1) {
pageRight->setEnabled(false);
}
if (currentPage == 1)
pageLeft->setEnabled(false);
}
void PopplerViewer::pageRightPressed() {
if (currentPage+1 < totalPages) {
currentPage++;
if (image != NULL)
delete image;
image = new QImage(doc->page(currentPage)->renderToImage());
image->save(printImageFile);
if (item != NULL)
delete item;
QPixmap finalPix = highlightImage();
item = new QGraphicsPixmapItem(finalPix);
scene->addItem(item);
if (currentPage+1 == totalPages)
pageRight->setEnabled(false);
if (currentPage>0)
pageLeft->setEnabled(true);
pageLabel->setText(tr("Page ") +QString::number(currentPage+1) + QString(tr(" of ") +QString::number(totalPages)));
}
}
void PopplerViewer::pageLeftPressed() {
if (currentPage>0) {
currentPage--;
if (image != NULL)
delete image;
image = new QImage(doc->page(currentPage)->renderToImage());
if (item != NULL)
delete item;
QPixmap finalPix = highlightImage();
item = new QGraphicsPixmapItem(finalPix);
scene->addItem(item);
if (currentPage==0)
pageLeft->setEnabled(false);
if (totalPages>1)
pageRight->setEnabled(true);
}
}
// Search for the next page containing text
void PopplerViewer::findNextPage(QStringList searchHits, QList<QRectF> *searchLocations) {
int page = currentPage;
bool found = false;
searchLocations->clear();
while (page < doc->numPages() && !found) {
for (int i=0; i<searchHits.size(); i++) {
QList<QRectF> results = doc->page(page)->search(searchHits[i], Poppler::Page::CaseInsensitive);
searchLocations->append(results);
if (results.size() > 0) {
currentPage = page;
return;
}
}
page++;
}
}
QPixmap PopplerViewer::highlightImage() {
// Highlight any search terms
QPixmap overlayPix(image->size());
overlayPix.fill(Qt::transparent);
QPainter p2(&overlayPix);
p2.setBackgroundMode(Qt::TransparentMode);
p2.setRenderHint(QPainter::Antialiasing,true);
QColor yellow(Qt::yellow);
p2.setBrush(yellow);
QList<QRectF> searchLocations;
for (int i=0; i<searchHits.size(); i++) {
searchLocations.append(doc->page(currentPage)->search(searchHits[i], Poppler::Page::CaseInsensitive));
}
for (int i=0; i<searchLocations.size(); i++) {
QRectF highlightRect = searchLocations[i];
p2.drawRect(highlightRect.x(), highlightRect.y(), highlightRect.width(), highlightRect.height());
}
if (searchLocations.size() > 0)
pageLabel->setStyleSheet("QLabel { background-color : yellow; }");
else
pageLabel->setStyleSheet("");
// Create the actual overlay. We do this in two steps to avoid
// constantly painting the same area
QPixmap finalPix(image->size());
finalPix.fill(Qt::transparent);
QPainter p3(&finalPix);
p3.setBackgroundMode(Qt::TransparentMode);
p3.setRenderHint(QPainter::Antialiasing,true);
p3.drawPixmap(0,0,QPixmap::fromImage(*image));
p3.setOpacity(0.4);
p3.drawPixmap(0,0,overlayPix);
p3.end();
return finalPix;
}
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