331 lines
9.0 KiB
C++
331 lines
9.0 KiB
C++
/*
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* Squawk messenger.
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* Copyright (C) 2019 Yury Gubich <blue@macaw.me>
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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 General Public License as published by
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* the Free Software Foundation, either version 3 of the License, 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 General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "preview.h"
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constexpr int margin = 6;
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constexpr int maxAttachmentHeight = 500;
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QFont Preview::font;
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QFontMetrics Preview::metrics(Preview::font);
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Preview::Preview(const QString& pPath, const QSize& pMaxSize, const QPoint& pos, bool pRight, QWidget* pParent):
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info(Shared::Global::getFileInfo(pPath)),
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path(pPath),
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maxSize(pMaxSize),
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actualSize(constrainAttachSize(info.size, maxSize)),
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cachedLabelSize(0, 0),
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position(pos),
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widget(0),
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label(0),
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parent(pParent),
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movie(0),
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fileReachable(true),
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actualPreview(false),
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right(pRight)
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{
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initializeElements();
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if (fileReachable) {
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positionElements();
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}
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}
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void Preview::initializeFont(const QFont& newFont)
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{
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font = newFont;
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font.setBold(true);
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metrics = QFontMetrics(font);
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}
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Preview::~Preview()
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{
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clean();
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}
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void Preview::clean()
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{
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if (fileReachable) {
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if (info.preview == Shared::Global::FileInfo::Preview::animation) {
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delete movie;
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}
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delete widget;
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if (!actualPreview) {
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delete label;
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} else {
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actualPreview = false;
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}
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} else {
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fileReachable = true;
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}
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}
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void Preview::actualize(const QString& newPath, const QSize& newSize, const QPoint& newPoint)
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{
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bool positionChanged = false;
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bool sizeChanged = false;
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bool maxSizeChanged = false;
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if (maxSize != newSize) {
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maxSize = newSize;
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maxSizeChanged = true;
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QSize ns = constrainAttachSize(info.size, maxSize);
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if (actualSize != ns) {
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sizeChanged = true;
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actualSize = ns;
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}
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}
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if (position != newPoint) {
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position = newPoint;
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positionChanged = true;
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}
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if (!setPath(newPath) && fileReachable) {
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if (sizeChanged) {
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applyNewSize();
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if (maxSizeChanged && !actualPreview) {
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applyNewMaxSize();
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}
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} else if (maxSizeChanged) {
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applyNewMaxSize();
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if (right) {
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positionChanged = true;
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}
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}
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if (positionChanged || !actualPreview) {
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positionElements();
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}
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}
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}
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void Preview::setSize(const QSize& newSize)
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{
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bool sizeChanged = false;
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bool maxSizeChanged = false;
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if (maxSize != newSize) {
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maxSize = newSize;
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maxSizeChanged = true;
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QSize ns = constrainAttachSize(info.size, maxSize);
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if (actualSize != ns) {
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sizeChanged = true;
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actualSize = ns;
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}
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}
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if (fileReachable) {
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if (sizeChanged) {
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applyNewSize();
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}
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if (maxSizeChanged || !actualPreview) {
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applyNewMaxSize();
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if (right) {
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positionElements();
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}
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}
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}
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}
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void Preview::applyNewSize()
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{
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switch (info.preview) {
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case Shared::Global::FileInfo::Preview::picture: {
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QImageReader img(path);
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if (!img.canRead()) {
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delete widget;
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fileReachable = false;
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} else {
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img.setScaledSize(actualSize);
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widget->resize(actualSize);
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widget->setPixmap(QPixmap::fromImage(img.read()));
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}
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}
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break;
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case Shared::Global::FileInfo::Preview::animation:{
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movie->setScaledSize(actualSize);
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widget->resize(actualSize);
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}
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break;
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default: {
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QIcon icon = QIcon::fromTheme(info.mime.iconName());
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if (icon.isNull()) {
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icon.addFile(QString::fromUtf8(":/images/fallback/dark/big/mail-attachment.svg"), QSize(), QIcon::Normal, QIcon::Off);
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}
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widget->setPixmap(icon.pixmap(actualSize));
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widget->resize(actualSize);
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}
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}
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}
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void Preview::applyNewMaxSize()
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{
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switch (info.preview) {
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case Shared::Global::FileInfo::Preview::picture:
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case Shared::Global::FileInfo::Preview::animation:
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break;
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default: {
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int labelWidth = maxSize.width() - actualSize.width() - margin;
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QString elidedName = metrics.elidedText(info.name, Qt::ElideMiddle, labelWidth);
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cachedLabelSize = metrics.boundingRect(elidedName).size();
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label->setText(elidedName);
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label->resize(cachedLabelSize);
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}
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}
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}
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QSize Preview::size() const
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{
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if (actualPreview) {
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return actualSize;
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} else {
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return QSize(actualSize.width() + margin + cachedLabelSize.width(), actualSize.height());
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}
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}
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bool Preview::isFileReachable() const
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{
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return fileReachable;
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}
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void Preview::setPosition(const QPoint& newPoint)
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{
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if (position != newPoint) {
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position = newPoint;
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if (fileReachable) {
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positionElements();
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}
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}
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}
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bool Preview::setPath(const QString& newPath)
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{
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if (path != newPath) {
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path = newPath;
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info = Shared::Global::getFileInfo(path);
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actualSize = constrainAttachSize(info.size, maxSize);
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clean();
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initializeElements();
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if (fileReachable) {
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positionElements();
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}
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return true;
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} else {
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return false;
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}
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}
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void Preview::initializeElements()
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{
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switch (info.preview) {
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case Shared::Global::FileInfo::Preview::picture: {
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QImageReader img(path);
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if (!img.canRead()) {
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fileReachable = false;
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} else {
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actualPreview = true;
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img.setScaledSize(actualSize);
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widget = new QLabel(parent);
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widget->setPixmap(QPixmap::fromImage(img.read()));
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widget->show();
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}
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}
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break;
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case Shared::Global::FileInfo::Preview::animation:{
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movie = new QMovie(path);
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QObject::connect(movie, &QMovie::error,
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std::bind(&Preview::handleQMovieError, this, std::placeholders::_1)
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);
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if (!movie->isValid()) {
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fileReachable = false;
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delete movie;
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} else {
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actualPreview = true;
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movie->setScaledSize(actualSize);
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widget = new QLabel(parent);
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widget->setMovie(movie);
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movie->start();
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widget->show();
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}
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}
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break;
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default: {
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QIcon icon = QIcon::fromTheme(info.mime.iconName());
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if (icon.isNull()) {
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icon.addFile(QString::fromUtf8(":/images/fallback/dark/big/mail-attachment.svg"), QSize(), QIcon::Normal, QIcon::Off);
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}
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widget = new QLabel(parent);
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widget->setPixmap(icon.pixmap(actualSize));
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widget->show();
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label = new QLabel(parent);
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label->setFont(font);
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int labelWidth = maxSize.width() - actualSize.width() - margin;
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QString elidedName = metrics.elidedText(info.name, Qt::ElideMiddle, labelWidth);
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cachedLabelSize = metrics.boundingRect(elidedName).size();
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label->setText(elidedName);
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label->show();
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}
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}
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}
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void Preview::positionElements()
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{
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int start = position.x();
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if (right) {
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start += maxSize.width() - size().width();
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}
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widget->move(start, position.y());
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if (!actualPreview) {
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int x = start + actualSize.width() + margin;
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int y = position.y() + (actualSize.height() - cachedLabelSize.height()) / 2;
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label->move(x, y);
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}
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}
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QSize Preview::calculateAttachSize(const QString& path, const QRect& bounds)
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{
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Shared::Global::FileInfo info = Shared::Global::getFileInfo(path);
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return constrainAttachSize(info.size, bounds.size());
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}
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QSize Preview::constrainAttachSize(QSize src, QSize bounds)
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{
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if (bounds.height() > maxAttachmentHeight) {
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bounds.setHeight(maxAttachmentHeight);
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}
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if (src.width() > bounds.width() || src.height() > bounds.height()) {
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src.scale(bounds, Qt::KeepAspectRatio);
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}
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return src;
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}
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void Preview::handleQMovieError(QImageReader::ImageReaderError error)
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{
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if (error == QImageReader::FileNotFoundError) {
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fileReachable = false;
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movie->deleteLater();
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widget->deleteLater();
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}
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}
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