initial

.gitignore

+pdf
+*.o
+.*.swp
+*~

Makefile

+#############################################################################
+# Makefile for building: pdf
+# Generated by qmake (2.01a) (Qt 4.7.4) on: Di. Dez 20 21:22:22 2011
+# Project:  pdf.pro
+# Template: app
+# Command: /usr/bin/qmake -o Makefile pdf.pro
+#############################################################################
+
+####### Compiler, tools and options
+
+CC            = gcc
+CXX           = g++
+DEFINES       = -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED
+CFLAGS        = -m64 -pipe -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector --param=ssp-buffer-size=4 -D_FORTIFY_SOURCE=2 -fno-strict-aliasing -Wall -W -D_REENTRANT $(DEFINES)
+CXXFLAGS      = -m64 -pipe -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector --param=ssp-buffer-size=4 -D_FORTIFY_SOURCE=2 -fno-strict-aliasing -Wall -W -D_REENTRANT $(DEFINES)
+INCPATH       = -I/usr/share/qt/mkspecs/linux-g++-64 -I. -I/usr/include/QtCore -I/usr/include/QtGui -I/usr/include -I. -I.
+LINK          = g++
+LFLAGS        = -m64 -Wl,-O1,--sort-common,--as-needed,-z,relro,--hash-style=gnu -Wl,-O1
+LIBS          = $(SUBLIBS)  -L/usr/lib -lpoppler-qt4 -lQtGui -lQtCore -lpthread 
+AR            = ar cqs
+RANLIB        = 
+QMAKE         = /usr/bin/qmake
+TAR           = tar -cf
+COMPRESS      = gzip -9f
+COPY          = cp -f
+SED           = sed
+COPY_FILE     = $(COPY)
+COPY_DIR      = $(COPY) -r
+STRIP         = strip
+INSTALL_FILE  = install -m 644 -p
+INSTALL_DIR   = $(COPY_DIR)
+INSTALL_PROGRAM = install -m 755 -p
+DEL_FILE      = rm -f
+SYMLINK       = ln -f -s
+DEL_DIR       = rmdir
+MOVE          = mv -f
+CHK_DIR_EXISTS= test -d
+MKDIR         = mkdir -p
+
+####### Output directory
+
+OBJECTS_DIR   = ./
+
+####### Files
+
+SOURCES       = main.cpp \
+		pdfviewer.cpp \
+		resourcemanager.cpp moc_pdfviewer.cpp
+OBJECTS       = main.o \
+		pdfviewer.o \
+		resourcemanager.o \
+		moc_pdfviewer.o
+DIST          = /usr/share/qt/mkspecs/common/g++.conf \
+		/usr/share/qt/mkspecs/common/unix.conf \
+		/usr/share/qt/mkspecs/common/linux.conf \
+		/usr/share/qt/mkspecs/qconfig.pri \
+		/usr/share/qt/mkspecs/modules/qt_webkit_version.pri \
+		/usr/share/qt/mkspecs/features/qt_functions.prf \
+		/usr/share/qt/mkspecs/features/qt_config.prf \
+		/usr/share/qt/mkspecs/features/exclusive_builds.prf \
+		/usr/share/qt/mkspecs/features/default_pre.prf \
+		/usr/share/qt/mkspecs/features/release.prf \
+		/usr/share/qt/mkspecs/features/default_post.prf \
+		/usr/share/qt/mkspecs/features/warn_on.prf \
+		/usr/share/qt/mkspecs/features/qt.prf \
+		/usr/share/qt/mkspecs/features/unix/thread.prf \
+		/usr/share/qt/mkspecs/features/moc.prf \
+		/usr/share/qt/mkspecs/features/resources.prf \
+		/usr/share/qt/mkspecs/features/uic.prf \
+		/usr/share/qt/mkspecs/features/yacc.prf \
+		/usr/share/qt/mkspecs/features/lex.prf \
+		/usr/share/qt/mkspecs/features/include_source_dir.prf \
+		pdf.pro
+QMAKE_TARGET  = pdf
+DESTDIR       = 
+TARGET        = pdf
+
+first: all
+####### Implicit rules
+
+.SUFFIXES: .o .c .cpp .cc .cxx .C
+
+.cpp.o:
+	$(CXX) -c $(CXXFLAGS) $(INCPATH) -o "$@" "$<"
+
+.cc.o:
+	$(CXX) -c $(CXXFLAGS) $(INCPATH) -o "$@" "$<"
+
+.cxx.o:
+	$(CXX) -c $(CXXFLAGS) $(INCPATH) -o "$@" "$<"
+
+.C.o:
+	$(CXX) -c $(CXXFLAGS) $(INCPATH) -o "$@" "$<"
+
+.c.o:
+	$(CC) -c $(CFLAGS) $(INCPATH) -o "$@" "$<"
+
+####### Build rules
+
+all: Makefile $(TARGET)
+
+$(TARGET):  $(OBJECTS)  
+	$(LINK) $(LFLAGS) -o $(TARGET) $(OBJECTS) $(OBJCOMP) $(LIBS)
+
+Makefile: pdf.pro  /usr/share/qt/mkspecs/linux-g++-64/qmake.conf /usr/share/qt/mkspecs/common/g++.conf \
+		/usr/share/qt/mkspecs/common/unix.conf \
+		/usr/share/qt/mkspecs/common/linux.conf \
+		/usr/share/qt/mkspecs/qconfig.pri \
+		/usr/share/qt/mkspecs/modules/qt_webkit_version.pri \
+		/usr/share/qt/mkspecs/features/qt_functions.prf \
+		/usr/share/qt/mkspecs/features/qt_config.prf \
+		/usr/share/qt/mkspecs/features/exclusive_builds.prf \
+		/usr/share/qt/mkspecs/features/default_pre.prf \
+		/usr/share/qt/mkspecs/features/release.prf \
+		/usr/share/qt/mkspecs/features/default_post.prf \
+		/usr/share/qt/mkspecs/features/warn_on.prf \
+		/usr/share/qt/mkspecs/features/qt.prf \
+		/usr/share/qt/mkspecs/features/unix/thread.prf \
+		/usr/share/qt/mkspecs/features/moc.prf \
+		/usr/share/qt/mkspecs/features/resources.prf \
+		/usr/share/qt/mkspecs/features/uic.prf \
+		/usr/share/qt/mkspecs/features/yacc.prf \
+		/usr/share/qt/mkspecs/features/lex.prf \
+		/usr/share/qt/mkspecs/features/include_source_dir.prf \
+		/usr/lib/libQtGui.prl \
+		/usr/lib/libQtCore.prl
+	$(QMAKE) -o Makefile pdf.pro
+/usr/share/qt/mkspecs/common/g++.conf:
+/usr/share/qt/mkspecs/common/unix.conf:
+/usr/share/qt/mkspecs/common/linux.conf:
+/usr/share/qt/mkspecs/qconfig.pri:
+/usr/share/qt/mkspecs/modules/qt_webkit_version.pri:
+/usr/share/qt/mkspecs/features/qt_functions.prf:
+/usr/share/qt/mkspecs/features/qt_config.prf:
+/usr/share/qt/mkspecs/features/exclusive_builds.prf:
+/usr/share/qt/mkspecs/features/default_pre.prf:
+/usr/share/qt/mkspecs/features/release.prf:
+/usr/share/qt/mkspecs/features/default_post.prf:
+/usr/share/qt/mkspecs/features/warn_on.prf:
+/usr/share/qt/mkspecs/features/qt.prf:
+/usr/share/qt/mkspecs/features/unix/thread.prf:
+/usr/share/qt/mkspecs/features/moc.prf:
+/usr/share/qt/mkspecs/features/resources.prf:
+/usr/share/qt/mkspecs/features/uic.prf:
+/usr/share/qt/mkspecs/features/yacc.prf:
+/usr/share/qt/mkspecs/features/lex.prf:
+/usr/share/qt/mkspecs/features/include_source_dir.prf:
+/usr/lib/libQtGui.prl:
+/usr/lib/libQtCore.prl:
+qmake:  FORCE
+	@$(QMAKE) -o Makefile pdf.pro
+
+dist: 
+	@$(CHK_DIR_EXISTS) .tmp/pdf1.0.0 || $(MKDIR) .tmp/pdf1.0.0 
+	$(COPY_FILE) --parents $(SOURCES) $(DIST) .tmp/pdf1.0.0/ && $(COPY_FILE) --parents pdfviewer.h resourcemanager.h .tmp/pdf1.0.0/ && $(COPY_FILE) --parents main.cpp pdfviewer.cpp resourcemanager.cpp .tmp/pdf1.0.0/ && (cd `dirname .tmp/pdf1.0.0` && $(TAR) pdf1.0.0.tar pdf1.0.0 && $(COMPRESS) pdf1.0.0.tar) && $(MOVE) `dirname .tmp/pdf1.0.0`/pdf1.0.0.tar.gz . && $(DEL_FILE) -r .tmp/pdf1.0.0
+
+
+clean:compiler_clean 
+	-$(DEL_FILE) $(OBJECTS)
+	-$(DEL_FILE) *~ core *.core
+
+
+####### Sub-libraries
+
+distclean: clean
+	-$(DEL_FILE) $(TARGET) 
+	-$(DEL_FILE) Makefile
+
+
+check: first
+
+mocclean: compiler_moc_header_clean compiler_moc_source_clean
+
+mocables: compiler_moc_header_make_all compiler_moc_source_make_all
+
+compiler_moc_header_make_all: moc_pdfviewer.cpp
+compiler_moc_header_clean:
+	-$(DEL_FILE) moc_pdfviewer.cpp
+moc_pdfviewer.cpp: resourcemanager.h \
+		pdfviewer.h
+	/usr/bin/moc $(DEFINES) $(INCPATH) pdfviewer.h -o moc_pdfviewer.cpp
+
+compiler_rcc_make_all:
+compiler_rcc_clean:
+compiler_image_collection_make_all: qmake_image_collection.cpp
+compiler_image_collection_clean:
+	-$(DEL_FILE) qmake_image_collection.cpp
+compiler_moc_source_make_all:
+compiler_moc_source_clean:
+compiler_uic_make_all:
+compiler_uic_clean:
+compiler_yacc_decl_make_all:
+compiler_yacc_decl_clean:
+compiler_yacc_impl_make_all:
+compiler_yacc_impl_clean:
+compiler_lex_make_all:
+compiler_lex_clean:
+compiler_clean: compiler_moc_header_clean 
+
+####### Compile
+
+main.o: main.cpp resourcemanager.h \
+		pdfviewer.h
+	$(CXX) -c $(CXXFLAGS) $(INCPATH) -o main.o main.cpp
+
+pdfviewer.o: pdfviewer.cpp pdfviewer.h \
+		resourcemanager.h
+	$(CXX) -c $(CXXFLAGS) $(INCPATH) -o pdfviewer.o pdfviewer.cpp
+
+resourcemanager.o: resourcemanager.cpp resourcemanager.h
+	$(CXX) -c $(CXXFLAGS) $(INCPATH) -o resourcemanager.o resourcemanager.cpp
+
+moc_pdfviewer.o: moc_pdfviewer.cpp 
+	$(CXX) -c $(CXXFLAGS) $(INCPATH) -o moc_pdfviewer.o moc_pdfviewer.cpp
+
+####### Install
+
+install:   FORCE
+
+uninstall:   FORCE
+
+FORCE:
+

main.cpp

+#include <QApplication>
+#include <QImage>
+#include <QString>
+#include <iostream>
+
+#include "resourcemanager.h"
+#include "pdfviewer.h"
+
+int main(int argc, char *argv[]) {
+	using namespace std;
+	QApplication app(argc, argv);
+
+	if (argc != 2) {
+		cerr << "usage: " << argv[0] << " <path>" << endl;
+		return 1;
+	}
+
+	ResourceManager res(argv[1]);
+	if (res.isNull())
+		return 1;
+	PdfViewer pdf(&res);
+	pdf.show();
+
+	return app.exec();
+}
+

pdf.pro

+TEMPLATE = app
+TARGET = pdf
+DEPENDPATH += .
+INCLUDEPATH += .
+
+# Input
+HEADERS += pdfviewer.h resourcemanager.h
+SOURCES += main.cpp pdfviewer.cpp resourcemanager.cpp
+unix:LIBS += -lpoppler-qt4

pdfviewer.cpp

+#include "pdfviewer.h"
+
+PdfViewer::PdfViewer(ResourceManager *_res, QWidget *parent) :
+		QWidget(parent),
+		res(_res),
+		page(0),
+		scroll(0.0),
+		fit(false) {
+	setFocusPolicy(Qt::StrongFocus);
+}
+
+PdfViewer::~PdfViewer() {
+}
+
+void PdfViewer::paintEvent(QPaintEvent * /*event*/) {
+	using namespace std;
+	cout << "redraw" << endl;
+	QPainter painter(this);
+	for (int i = 0; i < 2; ++i) {
+		QImage *img = res->getPage(page + i, width());
+		if (img != NULL) {
+			pageHeight = img->height();
+			QRect target(0, 0, width(), height());
+			QRect source(0, scroll * pageHeight - (img->height() + 2) * i, width(), height());
+			painter.drawImage(target, *img, source);
+		} else {
+			cout << "null: " << page << " " << i << endl;
+		}
+	}
+}
+
+void PdfViewer::keyPressEvent(QKeyEvent *event) {
+	switch (event->key()) {
+		case Qt::Key_Q:
+		case Qt::Key_Escape:
+			QCoreApplication::exit(0);
+			break;
+		case Qt::Key_Space:
+		case Qt::Key_Down:
+			scroll = 0;
+			setPage(1, true);
+			break;
+		case Qt::Key_Backspace:
+		case Qt::Key_Up:
+			scroll = 0;
+			setPage(-1, true);
+			break;
+		case Qt::Key_J:
+			scrollPage(0, -50);
+			break;
+		case Qt::Key_K:
+			scrollPage(0, 50);
+			break;
+		case Qt::Key_G:
+			scroll = 0;
+			setPage(0);
+			break;
+		case Qt::Key_B:
+			scroll = 0;
+			setPage(res->numPages() - 1);
+			break;
+		case Qt::Key_1:
+			toggleFit();
+			break;
+		default:
+			QWidget::keyPressEvent(event);
+			break;
+	}
+}
+
+void PdfViewer::mousePressEvent(QMouseEvent *event) {
+	if (event->button() == Qt::LeftButton) {
+		mx = event->x();
+		my = event->y();
+	}
+}
+
+void PdfViewer::mouseMoveEvent(QMouseEvent *event) {
+	scrollPage(event->x() - mx, event->y() - my);
+	mx = event->x();
+	my = event->y();
+}
+
+void PdfViewer::resizeEvent(QResizeEvent * /*event*/) {
+	update();
+}
+
+void PdfViewer::setPage(int newPage, bool relative) {
+	if (relative) {
+		newPage += page;
+	}
+	if (newPage < 0) {
+		newPage = 0;
+		scroll = 0;
+	} else if (newPage >= res->numPages()) {
+		newPage = res->numPages() - 1;
+	}
+
+	if (page != newPage) {
+		QString str = "page ";
+		str.append(QString::number(page));
+		str.append("/");
+		str.append(QString::number(res->numPages()));
+		setWindowTitle(str);
+		page = newPage;
+		update();
+	}
+}
+
+void PdfViewer::toggleFit() {
+	fit = not fit;
+	update();
+}
+
+void PdfViewer::scrollPage(int dx, int dy) {
+	if (dy == 0)
+		return;
+
+	scroll -= (float) dy / pageHeight;
+	if (scroll < 0) {
+		scroll++;
+		setPage(-1, true);
+	} else if (scroll >= 1) {
+		scroll--;
+		setPage(1, true);
+	} else {
+		update();
+	}
+}

pdfviewer.h

+#ifndef PDFVIEWER_H
+#define PDFVIEWER_H
+
+#include <QWidget>
+#include <QImage>
+#include <QPainter>
+#include <QPaintEvent>
+#include <QString>
+#include <QKeyEvent>
+#include <QMouseEvent>
+#include <QCoreApplication>
+#include <QResizeEvent>
+#include <iostream>
+#include "resourcemanager.h"
+
+class PdfViewer : public QWidget {
+	Q_OBJECT
+
+public:
+	PdfViewer(ResourceManager *res, QWidget *parent = 0);
+	~PdfViewer();
+
+protected:
+	void paintEvent(QPaintEvent *event);
+	void keyPressEvent(QKeyEvent *event);
+	void mousePressEvent(QMouseEvent *event);
+	void mouseMoveEvent(QMouseEvent *event);
+	void resizeEvent(QResizeEvent *event);
+
+	void setPage(int newPage, bool relative = false);
+	void toggleFit();
+	void scrollPage(int dx, int dy);
+
+private:
+	ResourceManager *res;
+	int page;
+	int pageHeight;
+	float scroll;
+	bool fit;
+
+	int mx, my;
+
+};
+
+#endif
+

resourcemanager.cpp

+#include "resourcemanager.h"
+
+using namespace std;
+
+ResourceManager::ResourceManager(QString file) :
+		basePage(-1) {
+	doc = Poppler::Document::load(file);
+	doc->setRenderHint(Poppler::Document::Antialiasing, true);
+	doc->setRenderHint(Poppler::Document::TextAntialiasing, true);
+	doc->setRenderHint(Poppler::Document::TextHinting, true);
+	doc->setRenderHint(Poppler::Document::TextSlightHinting, true);
+	if (doc == NULL) {
+		cerr << "failed to open file" << endl;
+		return;
+	}
+	if (doc->isLocked()) {
+		cerr << "missing password" << endl;
+		delete doc;
+		doc = NULL;
+		return;
+	}
+}
+
+ResourceManager::~ResourceManager() {
+	delete doc;
+}
+
+bool ResourceManager::isNull() const {
+	return (doc == NULL);
+}
+
+QImage *ResourceManager::getPage(int newPage, int newWidth) {
+	if (width != newWidth) {
+		basePage = newPage;
+		width = newWidth;
+		image[1] = QImage();
+		return render(0) ? &image[0] : NULL;
+	}
+
+	if (basePage == -1) {
+		basePage = newPage;
+		width = newWidth;
+		return render(0) ? &image[0] : NULL;
+	}
+	switch (newPage - basePage) {
+		case -1:
+			basePage--;
+			image[1] = image[0];
+			return render(0) ? &image[0] : NULL;
+			break;
+		case 0:
+			return &image[0];
+			break;
+		case 1:
+			if (image[1].isNull()) {
+				return render(1) ? &image[1] : NULL;
+			} else {
+				return &image[1];
+			}
+			break;
+		case 2:
+			basePage++;
+			image[0] = image[1];
+			return render(1) ? &image[1] : NULL;
+			break;
+		default:
+			basePage = newPage;
+			image[1] = QImage();
+			return render(0) ? &image[0] : NULL;
+	}
+
+/*	if (page == newPage && width == newWidth) {
+		return &image[0];
+	}
+
+	return &image[0]; */
+}
+
+bool ResourceManager::render(int offset) {
+	using namespace std;
+	cout << "    rerendering page " << (basePage + offset) << endl;
+	Poppler::Page *p = doc->page(basePage + offset);
+	if (p== NULL) {
+		cerr << "failed to load page " << (basePage + offset) << endl;
+		return false;
+	}
+	float dpi = 72.0 * width / p->pageSizeF().width();
+	image[offset] = p->renderToImage(dpi, dpi);
+	if (image[offset].isNull()) {
+		cerr << "failed to render page " << (basePage + offset) << endl;
+		return false;
+	}
+	return true;
+}
+
+int ResourceManager::numPages() const {
+	return doc->numPages();
+}
+

resourcemanager.h

+#ifndef RESOURCEMANAGER_H
+#define RESOURCEMANAGER_H
+
+#include <poppler/qt4/poppler-qt4.h>
+#include <QString>
+#include <QImage>
+#include <iostream>
+
+class ResourceManager {
+
+public:
+	ResourceManager(QString file);
+	~ResourceManager();
+
+	bool isNull() const;
+	QImage *getPage(int newPage, int newWidth);
+	int numPages() const;
+
+private:
+	bool render(int offset);
+
+	Poppler::Document *doc;
+	int basePage;
+	QImage image[2];
+	int width;
+
+};
+
+#endif
+