519 lines
16 KiB
C++
519 lines
16 KiB
C++
// For license of this file, see <project-root-folder>/LICENSE.md.
|
|
|
|
#include "gui/webviewers/qtextbrowser/textbrowserviewer.h"
|
|
|
|
#include "3rd-party/boolinq/boolinq.h"
|
|
#include "definitions/globals.h"
|
|
#include "gui/dialogs/formmain.h"
|
|
#include "gui/webbrowser.h"
|
|
#include "miscellaneous/application.h"
|
|
#include "miscellaneous/externaltool.h"
|
|
#include "miscellaneous/iconfactory.h"
|
|
#include "miscellaneous/settings.h"
|
|
#include "network-web/adblock/adblockrequestinfo.h"
|
|
#include "network-web/downloader.h"
|
|
#include "network-web/networkfactory.h"
|
|
#include "network-web/webfactory.h"
|
|
|
|
#include <QContextMenuEvent>
|
|
#include <QFileIconProvider>
|
|
#include <QScrollBar>
|
|
#include <QTimer>
|
|
|
|
TextBrowserViewer::TextBrowserViewer(QWidget* parent)
|
|
: QTextBrowser(parent), m_resourcesEnabled(false), m_resourceDownloader(new Downloader(this)), m_loadedResources({}),
|
|
m_placeholderImage(qApp->icons()->miscPixmap(QSL("image-placeholder"))),
|
|
m_placeholderImageError(qApp->icons()->miscPixmap(QSL("image-placeholder-error"))),
|
|
m_downloader(new Downloader(this)), m_document(new TextBrowserDocument(this)) {
|
|
setAutoFillBackground(false);
|
|
setFrameShape(QFrame::Shape::NoFrame);
|
|
setFrameShadow(QFrame::Shadow::Plain);
|
|
setTabChangesFocus(true);
|
|
setOpenLinks(false);
|
|
setWordWrapMode(QTextOption::WrapMode::WordWrap);
|
|
|
|
viewport()->setAutoFillBackground(false);
|
|
|
|
setResourcesEnabled(qApp->settings()->value(GROUP(Messages), SETTING(Messages::ShowResourcesInArticles)).toBool());
|
|
setDocument(m_document.data());
|
|
|
|
connect(this, &TextBrowserViewer::reloadDocument, this, [this]() {
|
|
const auto scr = verticalScrollBarPosition();
|
|
setHtmlPrivate(html(), m_currentUrl);
|
|
setVerticalScrollBarPosition(scr);
|
|
});
|
|
|
|
connect(m_resourceDownloader.data(), &Downloader::completed, this, &TextBrowserViewer::resourceDownloaded);
|
|
connect(this, &QTextBrowser::anchorClicked, this, &TextBrowserViewer::onAnchorClicked);
|
|
connect(this, QOverload<const QUrl&>::of(&QTextBrowser::highlighted), this, &TextBrowserViewer::linkMouseHighlighted);
|
|
}
|
|
|
|
QSize TextBrowserViewer::sizeHint() const {
|
|
auto doc_size = document()->size().toSize();
|
|
|
|
doc_size.setHeight(doc_size.height() + contentsMargins().top() + contentsMargins().bottom());
|
|
return doc_size;
|
|
}
|
|
|
|
QVariant TextBrowserViewer::loadOneResource(int type, const QUrl& name) {
|
|
if (type != QTextDocument::ResourceType::ImageResource) {
|
|
return {};
|
|
}
|
|
|
|
auto resolved_name = (m_currentUrl.isValid() && name.isRelative()) ? m_currentUrl.resolved(name) : name;
|
|
|
|
if (!m_resourcesEnabled || !m_loadedResources.contains(resolved_name)) {
|
|
// Resources are not enabled.
|
|
return m_placeholderImage;
|
|
}
|
|
|
|
// Resources are enabled and we already have the resource.
|
|
QByteArray resource_data = m_loadedResources.value(resolved_name);
|
|
QImage img;
|
|
|
|
if (resource_data.isEmpty()) {
|
|
img = m_placeholderImageError.toImage();
|
|
}
|
|
else {
|
|
img = QImage::fromData(m_loadedResources.value(resolved_name));
|
|
}
|
|
|
|
int acceptable_width = int(width() * 0.9);
|
|
|
|
if (img.width() > acceptable_width) {
|
|
qWarningNN << LOGSEC_GUI << "Picture" << QUOTE_W_SPACE(name)
|
|
<< "is too wide, down-scaling to prevent horizontal scrollbars.";
|
|
|
|
img = img.scaledToWidth(acceptable_width);
|
|
}
|
|
|
|
return img;
|
|
}
|
|
|
|
void TextBrowserViewer::bindToBrowser(WebBrowser* browser) {
|
|
installEventFilter(browser);
|
|
|
|
browser->m_actionBack = nullptr;
|
|
browser->m_actionForward = nullptr;
|
|
browser->m_actionReload = nullptr;
|
|
browser->m_actionStop = nullptr;
|
|
}
|
|
|
|
void TextBrowserViewer::findText(const QString& text, bool backwards) {
|
|
if (!text.isEmpty()) {
|
|
bool found =
|
|
QTextBrowser::find(text, backwards ? QTextDocument::FindFlag::FindBackward : QTextDocument::FindFlag(0));
|
|
|
|
if (!found) {
|
|
textCursor().clearSelection();
|
|
moveCursor(QTextCursor::MoveOperation::Start);
|
|
|
|
QTextBrowser::find(text, backwards ? QTextDocument::FindFlag::FindBackward : QTextDocument::FindFlag(0));
|
|
}
|
|
}
|
|
else {
|
|
textCursor().clearSelection();
|
|
moveCursor(QTextCursor::MoveOperation::Start);
|
|
}
|
|
}
|
|
|
|
BlockingResult TextBrowserViewer::blockedWithAdblock(const QUrl& url) {
|
|
AdblockRequestInfo block_request(url);
|
|
|
|
if (url.path().endsWith(QSL("css"))) {
|
|
block_request.setResourceType(QSL("stylesheet"));
|
|
}
|
|
else {
|
|
block_request.setResourceType(QSL("image"));
|
|
}
|
|
|
|
auto block_result = qApp->web()->adBlock()->block(block_request);
|
|
|
|
if (block_result.m_blocked) {
|
|
qWarningNN << LOGSEC_ADBLOCK << "Blocked request:" << QUOTE_W_SPACE_DOT(block_request.requestUrl().toString());
|
|
return block_result;
|
|
}
|
|
else {
|
|
return block_result;
|
|
}
|
|
}
|
|
|
|
void TextBrowserViewer::setUrl(const QUrl& url) {
|
|
emit loadingStarted();
|
|
|
|
QString html_str;
|
|
QUrl nonconst_url = url;
|
|
bool is_error = false;
|
|
auto block_result = blockedWithAdblock(url);
|
|
|
|
if (block_result.m_blocked) {
|
|
is_error = true;
|
|
nonconst_url = QUrl::fromUserInput(QSL(INTERNAL_URL_ADBLOCKED));
|
|
|
|
html_str = QSL("Blocked!!!<br/>%1").arg(url.toString());
|
|
}
|
|
else {
|
|
QEventLoop loop;
|
|
|
|
connect(m_downloader.data(), &Downloader::completed, &loop, &QEventLoop::quit);
|
|
m_downloader->manipulateData(url.toString(), QNetworkAccessManager::Operation::GetOperation, {}, 5000);
|
|
|
|
loop.exec();
|
|
|
|
const auto net_error = m_downloader->lastOutputError();
|
|
const QString content_type = m_downloader->lastContentType().toString();
|
|
|
|
if (net_error != QNetworkReply::NetworkError::NoError) {
|
|
is_error = true;
|
|
html_str = QSL("Error!<br/>%1").arg(NetworkFactory::networkErrorText(net_error));
|
|
}
|
|
else {
|
|
if (content_type.startsWith(QSL("image/"))) {
|
|
html_str = QSL("<img src=\"%1\">").arg(nonconst_url.toString());
|
|
}
|
|
else {
|
|
html_str = QString::fromUtf8(m_downloader->lastOutputData());
|
|
}
|
|
}
|
|
}
|
|
|
|
setHtml(html_str, nonconst_url);
|
|
|
|
emit loadingFinished(!is_error);
|
|
}
|
|
|
|
QString TextBrowserViewer::html() const {
|
|
return m_currentHtml;
|
|
}
|
|
|
|
QUrl TextBrowserViewer::url() const {
|
|
return m_currentUrl;
|
|
}
|
|
|
|
void TextBrowserViewer::clear() {
|
|
setHtml({});
|
|
}
|
|
|
|
void TextBrowserViewer::loadMessages(const QList<Message>& messages, RootItem* root) {
|
|
emit loadingStarted();
|
|
m_root = root;
|
|
|
|
auto html_messages = qApp->skins()->generateHtmlOfArticles(messages, root);
|
|
|
|
static QRegularExpression exp_replace_wide_stuff(QSL("width=\"([^\"]+)\""));
|
|
|
|
// html_messages.m_html = html_messages.m_html.replace(exp_replace_wide_stuff, QSL("width=\"%1\"").arg(width() *
|
|
// 0.9));
|
|
|
|
// Replace too wide pictures.
|
|
QRegularExpressionMatch exp_match;
|
|
qsizetype match_offset = 0;
|
|
int acceptable_width = int(width() * 0.9);
|
|
|
|
while ((exp_match = exp_replace_wide_stuff.match(html_messages.m_html, match_offset)).hasMatch()) {
|
|
int found_width = exp_match.captured(1).toInt();
|
|
|
|
if (found_width > acceptable_width) {
|
|
qWarningNN << LOGSEC_GUI << "Element" << QUOTE_W_SPACE(exp_match.captured())
|
|
<< "is too wide, setting smaller value to prevent horizontal scrollbars.";
|
|
|
|
html_messages.m_html = html_messages.m_html.replace(exp_match.capturedStart(1),
|
|
exp_match.capturedLength(1),
|
|
QString::number(acceptable_width));
|
|
}
|
|
|
|
match_offset = exp_match.capturedEnd();
|
|
}
|
|
|
|
// Remove other characters which cannot be displayed properly.
|
|
static QRegularExpression exp_symbols("[0-9A-F]{3};");
|
|
|
|
html_messages.m_html = html_messages.m_html.replace(exp_symbols, QString());
|
|
|
|
#if !defined(NDEBUG)
|
|
// IOFactory::writeFile("aaa.html", html_messages.m_html.toUtf8());
|
|
#endif
|
|
|
|
setHtml(html_messages.m_html, html_messages.m_baseUrl);
|
|
|
|
QTextOption op;
|
|
op.setTextDirection(messages.at(0).m_isRtl ? Qt::LayoutDirection::RightToLeft : Qt::LayoutDirection::LeftToRight);
|
|
document()->setDefaultTextOption(op);
|
|
|
|
emit loadingFinished(true);
|
|
}
|
|
|
|
double TextBrowserViewer::verticalScrollBarPosition() const {
|
|
return verticalScrollBar()->value();
|
|
}
|
|
|
|
void TextBrowserViewer::setVerticalScrollBarPosition(double pos) {
|
|
verticalScrollBar()->setValue(int(pos));
|
|
}
|
|
|
|
void TextBrowserViewer::applyFont(const QFont& fon) {
|
|
m_baseFont = fon;
|
|
setFont(fon);
|
|
setZoomFactor(zoomFactor());
|
|
}
|
|
|
|
qreal TextBrowserViewer::zoomFactor() const {
|
|
return m_zoomFactor;
|
|
}
|
|
|
|
void TextBrowserViewer::setZoomFactor(qreal zoom_factor) {
|
|
m_zoomFactor = zoom_factor;
|
|
|
|
auto fon = font();
|
|
|
|
fon.setPointSizeF(m_baseFont.pointSizeF() * zoom_factor);
|
|
|
|
setFont(fon);
|
|
}
|
|
|
|
void TextBrowserViewer::contextMenuEvent(QContextMenuEvent* event) {
|
|
event->accept();
|
|
|
|
auto* menu = createStandardContextMenu(event->pos());
|
|
|
|
if (menu == nullptr) {
|
|
return;
|
|
}
|
|
|
|
/*
|
|
connect(menu, &QMenu::aboutToHide, this, [menu] {
|
|
menu->deleteLater();
|
|
});*/
|
|
|
|
if (m_actionEnableResources.isNull()) {
|
|
m_actionEnableResources.reset(new QAction(qApp->icons()->fromTheme(QSL("viewimage"), QSL("image-x-generic")),
|
|
tr("Enable external resources"),
|
|
this));
|
|
m_actionDownloadLink.reset(new QAction(qApp->icons()->fromTheme(QSL("download")), tr("Download"), this));
|
|
|
|
m_actionEnableResources.data()->setCheckable(true);
|
|
m_actionEnableResources.data()->setChecked(resourcesEnabled());
|
|
|
|
connect(m_actionDownloadLink.data(), &QAction::triggered, this, &TextBrowserViewer::downloadLink);
|
|
connect(m_actionEnableResources.data(), &QAction::toggled, this, &TextBrowserViewer::enableResources);
|
|
}
|
|
|
|
menu->addAction(m_actionEnableResources.data());
|
|
menu->addAction(m_actionDownloadLink.data());
|
|
|
|
auto anchor = anchorAt(event->pos());
|
|
|
|
m_lastContextMenuPos = event->pos();
|
|
m_actionDownloadLink.data()->setEnabled(!anchor.isEmpty());
|
|
|
|
processContextMenu(menu, event);
|
|
|
|
menu->popup(event->globalPos());
|
|
}
|
|
|
|
void TextBrowserViewer::resizeEvent(QResizeEvent* event) {
|
|
// Notify parents about changed geometry.
|
|
updateGeometry();
|
|
QTextBrowser::resizeEvent(event);
|
|
}
|
|
|
|
void TextBrowserViewer::wheelEvent(QWheelEvent* event) {
|
|
// NOTE: Skip base class implemetation.
|
|
QAbstractScrollArea::wheelEvent(event);
|
|
updateMicroFocus();
|
|
}
|
|
|
|
void TextBrowserViewer::enableResources(bool enable) {
|
|
qApp->settings()->setValue(GROUP(Messages), Messages::ShowResourcesInArticles, enable);
|
|
setResourcesEnabled(enable);
|
|
}
|
|
|
|
void TextBrowserViewer::downloadLink() {
|
|
auto url = QUrl(anchorAt(m_lastContextMenuPos));
|
|
|
|
if (url.isValid()) {
|
|
const QUrl resolved_url = (m_currentUrl.isValid() && url.isRelative()) ? m_currentUrl.resolved(url) : url;
|
|
|
|
qApp->downloadManager()->download(resolved_url);
|
|
}
|
|
}
|
|
|
|
void TextBrowserViewer::onAnchorClicked(const QUrl& url) {
|
|
if (!url.isEmpty()) {
|
|
const QUrl resolved_url = (m_currentUrl.isValid() && url.isRelative()) ? m_currentUrl.resolved(url) : url;
|
|
const bool ctrl_pressed =
|
|
Globals::hasFlag(QGuiApplication::keyboardModifiers(), Qt::KeyboardModifier::ControlModifier);
|
|
|
|
if (ctrl_pressed) {
|
|
// Open in new tab.
|
|
qApp->mainForm()->tabWidget()->addLinkedBrowser(resolved_url);
|
|
}
|
|
else {
|
|
bool open_externally_now =
|
|
qApp->settings()->value(GROUP(Browser), SETTING(Browser::OpenLinksInExternalBrowserRightAway)).toBool();
|
|
|
|
if (open_externally_now) {
|
|
qApp->web()->openUrlInExternalBrowser(resolved_url.toString());
|
|
|
|
if (qApp->settings()
|
|
->value(GROUP(Messages), SETTING(Messages::BringAppToFrontAfterMessageOpenedExternally))
|
|
.toBool()) {
|
|
QTimer::singleShot(1000, qApp, []() {
|
|
qApp->mainForm()->display();
|
|
});
|
|
}
|
|
}
|
|
else {
|
|
setUrl(resolved_url);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void TextBrowserViewer::setHtml(const QString& html, const QUrl& base_url) {
|
|
if (m_resourcesEnabled) {
|
|
static QRegularExpression img_tag_rgx("\\<img[^\\>]*src\\s*=\\s*[\"\']([^\"\']*)[\"\'][^\\>]*\\>",
|
|
QRegularExpression::PatternOption::CaseInsensitiveOption |
|
|
QRegularExpression::PatternOption::InvertedGreedinessOption);
|
|
QRegularExpressionMatchIterator i = img_tag_rgx.globalMatch(html);
|
|
QList<QUrl> found_resources;
|
|
|
|
while (i.hasNext()) {
|
|
QRegularExpressionMatch match = i.next();
|
|
auto captured_url = QUrl(match.captured(1));
|
|
auto resolved_captured_url =
|
|
(base_url.isValid() && captured_url.isRelative()) ? base_url.resolved(captured_url) : captured_url;
|
|
|
|
if (!found_resources.contains(resolved_captured_url)) {
|
|
found_resources.append(resolved_captured_url);
|
|
}
|
|
}
|
|
|
|
auto really_needed_resources = boolinq::from(found_resources)
|
|
.where([this](const QUrl& res) {
|
|
return !m_loadedResources.contains(res);
|
|
})
|
|
.toStdList();
|
|
|
|
m_neededResources = FROM_STD_LIST(QList<QUrl>, really_needed_resources);
|
|
}
|
|
else {
|
|
m_neededResources = {};
|
|
}
|
|
|
|
setHtmlPrivate(html, base_url);
|
|
|
|
/*
|
|
QTextCursor cr(m_document.data());
|
|
|
|
cr.movePosition(QTextCursor::MoveOperation::Start);
|
|
|
|
// this can be used instead of regexps, just browse document and collect resource addresses directly
|
|
while (!cr.atEnd()) {
|
|
if (!cr.movePosition(QTextCursor::MoveOperation::NextBlock)) {
|
|
break;
|
|
}
|
|
|
|
QTextBlock::iterator it;
|
|
for (it = cr.block().begin(); !(it.atEnd()); ++it) {
|
|
QTextFragment currentFragment = it.fragment();
|
|
if (currentFragment.isValid()) {
|
|
auto aa = currentFragment.charFormat().anchorHref();
|
|
|
|
if (!aa.isEmpty()) {
|
|
auto xx = 5;
|
|
}
|
|
else if (currentFragment.charFormat().isImageFormat()) {
|
|
aa = currentFragment.charFormat().toImageFormat().name();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
*/
|
|
|
|
if (!m_neededResources.isEmpty()) {
|
|
QTimer::singleShot(20, this, &TextBrowserViewer::reloadHtmlDelayed);
|
|
}
|
|
|
|
setVerticalScrollBarPosition(0.0);
|
|
}
|
|
|
|
void TextBrowserViewer::setReadabledHtml(const QString& html, const QUrl& base_url) {
|
|
setHtml(html, base_url);
|
|
}
|
|
|
|
void TextBrowserViewer::setHtmlPrivate(const QString& html, const QUrl& base_url) {
|
|
m_currentUrl = base_url;
|
|
m_currentHtml = html;
|
|
|
|
QTextBrowser::setHtml(html);
|
|
setZoomFactor(m_zoomFactor);
|
|
|
|
emit pageTitleChanged(documentTitle());
|
|
emit pageUrlChanged(base_url);
|
|
}
|
|
|
|
TextBrowserDocument::TextBrowserDocument(TextBrowserViewer* parent) : QTextDocument(parent) {
|
|
m_viewer = parent;
|
|
}
|
|
|
|
QVariant TextBrowserDocument::loadResource(int type, const QUrl& name) {
|
|
return m_viewer->loadOneResource(type, name);
|
|
}
|
|
|
|
void TextBrowserViewer::reloadHtmlDelayed() {
|
|
if (!m_neededResources.isEmpty()) {
|
|
downloadNextNeededResource();
|
|
}
|
|
}
|
|
|
|
void TextBrowserViewer::downloadNextNeededResource() {
|
|
if (m_neededResources.isEmpty()) {
|
|
// Everything is downloaded.
|
|
emit reloadDocument();
|
|
}
|
|
else {
|
|
QUrl res = m_neededResources.takeFirst();
|
|
|
|
m_resourceDownloader.data()->manipulateData(qApp->web()->unescapeHtml(res.toString()),
|
|
QNetworkAccessManager::Operation::GetOperation,
|
|
{},
|
|
5000);
|
|
}
|
|
}
|
|
|
|
void TextBrowserViewer::resourceDownloaded(const QUrl& url,
|
|
QNetworkReply::NetworkError status,
|
|
int http_code,
|
|
QByteArray contents) {
|
|
Q_UNUSED(http_code)
|
|
|
|
if (status == QNetworkReply::NetworkError::NoError) {
|
|
m_loadedResources.insert(url, contents);
|
|
}
|
|
else {
|
|
m_loadedResources.insert(url, {});
|
|
}
|
|
|
|
downloadNextNeededResource();
|
|
}
|
|
|
|
bool TextBrowserViewer::resourcesEnabled() const {
|
|
return m_resourcesEnabled;
|
|
}
|
|
|
|
void TextBrowserViewer::setResourcesEnabled(bool enabled) {
|
|
m_resourcesEnabled = enabled;
|
|
}
|
|
|
|
ContextMenuData TextBrowserViewer::provideContextMenuData(QContextMenuEvent* event) const {
|
|
ContextMenuData c;
|
|
|
|
QString anchor = anchorAt(event->pos());
|
|
|
|
if (!anchor.isEmpty()) {
|
|
c.m_linkUrl = anchor;
|
|
}
|
|
|
|
return c;
|
|
}
|