538 lines
18 KiB
C++
538 lines
18 KiB
C++
// For license of this file, see <project-root-folder>/LICENSE.md.
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#include "gui/webviewers/qtextbrowser/textbrowserviewer.h"
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#include "3rd-party/boolinq/boolinq.h"
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#include "gui/dialogs/formmain.h"
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#include "gui/messagebox.h"
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#include "gui/webbrowser.h"
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#include "miscellaneous/application.h"
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#include "miscellaneous/externaltool.h"
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#include "miscellaneous/iconfactory.h"
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#include "network-web/adblock/adblockrequestinfo.h"
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#include "network-web/downloader.h"
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#include "network-web/networkfactory.h"
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#include "network-web/webfactory.h"
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#include <QContextMenuEvent>
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#include <QFileIconProvider>
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#include <QScrollBar>
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#include <QTimer>
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TextBrowserViewer::TextBrowserViewer(QWidget* parent)
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: QTextBrowser(parent), m_resourcesEnabled(false), m_resourceDownloader(new Downloader(this)),
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m_placeholderImage(qApp->icons()->miscPixmap("image-placeholder")),
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m_placeholderImageError(qApp->icons()->miscPixmap("image-placeholder-error")), m_downloader(new Downloader(this)),
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m_document(new TextBrowserDocument(this)) {
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setAutoFillBackground(true);
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setFrameShape(QFrame::Shape::NoFrame);
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setFrameShadow(QFrame::Shadow::Plain);
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setTabChangesFocus(true);
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setOpenLinks(false);
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viewport()->setAutoFillBackground(true);
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setResourcesEnabled(qApp->settings()->value(GROUP(Messages), SETTING(Messages::ShowResourcesInArticles)).toBool());
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setDocument(m_document.data());
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// Apply master CSS.
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QColor a_color = qApp->skins()->currentSkin().colorForModel(SkinEnums::PaletteColors::FgInteresting).value<QColor>();
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if (!a_color.isValid()) {
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a_color = qApp->palette().color(QPalette::ColorRole::Highlight);
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}
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m_document.data()->setDefaultStyleSheet(QSL("a { color: %1; }").arg(a_color.name()));
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connect(this, &TextBrowserViewer::reloadDocument, this, [this]() {
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const auto scr = verticalScrollBarPosition();
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setHtmlPrivate(html(), m_currentUrl);
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setVerticalScrollBarPosition(scr);
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});
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connect(m_resourceDownloader.data(), &Downloader::completed, this, &TextBrowserViewer::resourceDownloaded);
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connect(this, &QTextBrowser::anchorClicked, this, &TextBrowserViewer::onAnchorClicked);
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connect(this, QOverload<const QUrl&>::of(&QTextBrowser::highlighted), this, &TextBrowserViewer::linkMouseHighlighted);
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}
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QSize TextBrowserViewer::sizeHint() const {
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auto doc_size = document()->size().toSize();
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doc_size.setHeight(doc_size.height() + contentsMargins().top() + contentsMargins().bottom());
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return doc_size;
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}
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QVariant TextBrowserViewer::loadOneResource(int type, const QUrl& name) {
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if (type != QTextDocument::ResourceType::ImageResource) {
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return {};
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}
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auto resolved_name = m_currentUrl.isValid() ? m_currentUrl.resolved(name) : name;
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if (!m_resourcesEnabled || !m_loadedResources.contains(resolved_name)) {
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// Resources are not enabled.
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return m_placeholderImage;
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}
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// Resources are enabled and we already have the resource.
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QByteArray resource_data = m_loadedResources.value(resolved_name);
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if (resource_data.isEmpty()) {
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return m_placeholderImageError;
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}
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else {
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return QImage::fromData(m_loadedResources.value(resolved_name));
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}
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}
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PreparedHtml TextBrowserViewer::prepareHtmlForMessage(const QList<Message>& messages, RootItem* selected_item) const {
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PreparedHtml html;
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for (const Message& message : messages) {
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if (!message.m_url.isEmpty()) {
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html.m_html += QSL("<h2 align=\"center\"><a href=\"%2\">%1</a></h2>").arg(message.m_title, message.m_url);
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}
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else {
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html.m_html += QSL("<h2 align=\"center\">%1</h2>").arg(message.m_title);
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}
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html.m_html += QSL("<div>");
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for (const Enclosure& enc : message.m_enclosures) {
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html.m_html += QString("[%2] <a href=\"%1\">%1</a><br/>").arg(enc.m_url, enc.m_mimeType);
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}
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static QRegularExpression img_tag_rgx("\\<img[^\\>]*src\\s*=\\s*[\"\']([^\"\']*)[\"\'][^\\>]*\\>",
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QRegularExpression::PatternOption::CaseInsensitiveOption |
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QRegularExpression::PatternOption::InvertedGreedinessOption);
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QRegularExpressionMatchIterator i = img_tag_rgx.globalMatch(message.m_contents);
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QString pictures_html;
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while (i.hasNext()) {
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QRegularExpressionMatch match = i.next();
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auto captured_url = match.captured(1);
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pictures_html += QString("<br/>[%1] <a href=\"%2\">%2</a>").arg(tr("image"), captured_url);
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}
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QString cnts = message.m_contents;
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auto forced_img_size = qApp->settings()->value(GROUP(Messages), SETTING(Messages::MessageHeadImageHeight)).toInt();
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// Fixup all "img" tags.
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html.m_html += cnts.replace(img_tag_rgx,
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QSL("<a href=\"\\1\"><img height=\"%1\" src=\"\\1\" /></a>")
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.arg(forced_img_size <= 0 ? QString() : QString::number(forced_img_size)));
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html.m_html += pictures_html;
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}
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html.m_html += QSL("</div>");
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QString base_url;
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auto* feed = selected_item->getParentServiceRoot()
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->getItemFromSubTree([messages](const RootItem* it) {
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return it->kind() == RootItem::Kind::Feed && it->customId() == messages.at(0).m_feedId;
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})
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->toFeed();
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if (feed != nullptr) {
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QUrl url(NetworkFactory::sanitizeUrl(feed->source()));
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if (url.isValid()) {
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base_url = url.scheme() + QSL("://") + url.host();
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}
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}
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html.m_baseUrl = base_url;
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return html;
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}
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void TextBrowserViewer::bindToBrowser(WebBrowser* browser) {
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installEventFilter(browser);
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browser->m_actionBack = new QAction(this);
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browser->m_actionForward = new QAction(this);
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browser->m_actionReload = new QAction(this);
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browser->m_actionStop = new QAction(this);
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browser->m_actionBack->setEnabled(false);
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browser->m_actionForward->setEnabled(false);
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browser->m_actionReload->setEnabled(false);
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browser->m_actionStop->setEnabled(false);
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}
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void TextBrowserViewer::findText(const QString& text, bool backwards) {
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if (!text.isEmpty()) {
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bool found =
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QTextBrowser::find(text, backwards ? QTextDocument::FindFlag::FindBackward : QTextDocument::FindFlag(0));
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if (!found) {
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textCursor().clearSelection();
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moveCursor(QTextCursor::MoveOperation::Start);
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QTextBrowser::find(text, backwards ? QTextDocument::FindFlag::FindBackward : QTextDocument::FindFlag(0));
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}
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}
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else {
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textCursor().clearSelection();
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moveCursor(QTextCursor::MoveOperation::Start);
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}
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}
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BlockingResult TextBrowserViewer::blockedWithAdblock(const QUrl& url) {
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AdblockRequestInfo block_request(url);
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if (url.path().endsWith(QSL("css"))) {
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block_request.setResourceType(QSL("stylesheet"));
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}
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else {
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block_request.setResourceType(QSL("image"));
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}
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auto block_result = qApp->web()->adBlock()->block(block_request);
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if (block_result.m_blocked) {
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qWarningNN << LOGSEC_ADBLOCK << "Blocked request:" << QUOTE_W_SPACE_DOT(block_request.requestUrl().toString());
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return block_result;
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}
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else {
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return block_result;
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}
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}
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void TextBrowserViewer::setUrl(const QUrl& url) {
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emit loadingStarted();
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QString html_str;
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QUrl nonconst_url = url;
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bool is_error = false;
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auto block_result = blockedWithAdblock(url);
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if (block_result.m_blocked) {
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is_error = true;
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nonconst_url = QUrl::fromUserInput(QSL(INTERNAL_URL_ADBLOCKED));
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html_str = QSL("Blocked!!!<br/>%1").arg(url.toString());
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}
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else {
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QEventLoop loop;
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connect(m_downloader.data(), &Downloader::completed, &loop, &QEventLoop::quit);
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m_downloader->manipulateData(url.toString(), QNetworkAccessManager::Operation::GetOperation, {}, 5000);
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loop.exec();
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const auto net_error = m_downloader->lastOutputError();
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const QString content_type = m_downloader->lastContentType().toString();
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if (net_error != QNetworkReply::NetworkError::NoError) {
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is_error = true;
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html_str = QSL("Error!<br/>%1").arg(NetworkFactory::networkErrorText(net_error));
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}
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else {
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if (content_type.startsWith(QSL("image/"))) {
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html_str = QSL("<img src=\"%1\">").arg(nonconst_url.toString());
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}
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else {
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html_str = QString::fromUtf8(m_downloader->lastOutputData());
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}
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}
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}
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setHtml(html_str, nonconst_url);
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emit loadingFinished(!is_error);
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}
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QString TextBrowserViewer::html() const {
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return QTextBrowser::toHtml();
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}
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QUrl TextBrowserViewer::url() const {
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return m_currentUrl;
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}
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void TextBrowserViewer::clear() {
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setHtml({});
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}
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void TextBrowserViewer::loadMessages(const QList<Message>& messages, RootItem* root) {
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emit loadingStarted();
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m_root = root;
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auto html_messages = prepareHtmlForMessage(messages, root);
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setHtml(html_messages.m_html, html_messages.m_baseUrl);
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emit loadingFinished(true);
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}
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double TextBrowserViewer::verticalScrollBarPosition() const {
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return verticalScrollBar()->value();
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}
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void TextBrowserViewer::setVerticalScrollBarPosition(double pos) {
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verticalScrollBar()->setValue(int(pos));
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}
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void TextBrowserViewer::applyFont(const QFont& fon) {
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m_baseFont = fon;
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setFont(fon);
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setZoomFactor(zoomFactor());
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}
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qreal TextBrowserViewer::zoomFactor() const {
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return m_zoomFactor;
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}
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void TextBrowserViewer::setZoomFactor(qreal zoom_factor) {
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m_zoomFactor = zoom_factor;
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auto fon = font();
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fon.setPointSizeF(m_baseFont.pointSizeF() * zoom_factor);
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setFont(fon);
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}
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void TextBrowserViewer::contextMenuEvent(QContextMenuEvent* event) {
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event->accept();
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auto* menu = createStandardContextMenu(event->pos());
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if (menu == nullptr) {
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return;
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}
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if (m_actionEnableResources.isNull()) {
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m_actionEnableResources.reset(new QAction(qApp->icons()->fromTheme(QSL("viewimage"), QSL("image-x-generic")),
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tr("Enable external resources"),
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this));
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m_actionOpenExternalBrowser.reset(new QAction(qApp->icons()->fromTheme(QSL("document-open")),
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tr("Open in external browser"),
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this));
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m_actionDownloadLink.reset(new QAction(qApp->icons()->fromTheme(QSL("download")), tr("Download"), this));
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m_actionEnableResources.data()->setCheckable(true);
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m_actionEnableResources.data()->setChecked(resourcesEnabled());
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connect(m_actionOpenExternalBrowser.data(),
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&QAction::triggered,
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this,
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&TextBrowserViewer::openLinkInExternalBrowser);
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connect(m_actionDownloadLink.data(), &QAction::triggered, this, &TextBrowserViewer::downloadLink);
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connect(m_actionEnableResources.data(), &QAction::toggled, this, &TextBrowserViewer::enableResources);
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}
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menu->addAction(m_actionEnableResources.data());
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menu->addAction(m_actionOpenExternalBrowser.data());
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menu->addAction(m_actionDownloadLink.data());
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auto anchor = anchorAt(event->pos());
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m_lastContextMenuPos = event->pos();
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m_actionOpenExternalBrowser.data()->setEnabled(!anchor.isEmpty());
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m_actionDownloadLink.data()->setEnabled(!anchor.isEmpty());
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if (!anchor.isEmpty()) {
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QFileIconProvider icon_provider;
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QMenu* menu_ext_tools = new QMenu(tr("Open with external tool"), menu);
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auto tools = ExternalTool::toolsFromSettings();
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menu_ext_tools->setIcon(qApp->icons()->fromTheme(QSL("document-open")));
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for (const ExternalTool& tool : qAsConst(tools)) {
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QAction* act_tool = new QAction(QFileInfo(tool.executable()).fileName(), menu_ext_tools);
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act_tool->setIcon(icon_provider.icon(QFileInfo(tool.executable())));
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act_tool->setToolTip(tool.executable());
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act_tool->setData(QVariant::fromValue(tool));
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menu_ext_tools->addAction(act_tool);
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connect(act_tool, &QAction::triggered, this, [act_tool, anchor]() {
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act_tool->data().value<ExternalTool>().run(anchor);
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});
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}
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if (menu_ext_tools->actions().isEmpty()) {
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QAction* act_not_tools = new QAction("No external tools activated");
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act_not_tools->setEnabled(false);
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menu_ext_tools->addAction(act_not_tools);
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}
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menu->addMenu(menu_ext_tools);
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}
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connect(menu, &QMenu::aboutToHide, this, [menu] {
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menu->deleteLater();
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});
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menu->popup(event->globalPos());
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}
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void TextBrowserViewer::resizeEvent(QResizeEvent* event) {
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// Notify parents about changed geometry.
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updateGeometry();
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QTextBrowser::resizeEvent(event);
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}
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void TextBrowserViewer::wheelEvent(QWheelEvent* event) {
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// NOTE: Skip base class implemetation.
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QAbstractScrollArea::wheelEvent(event);
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updateMicroFocus();
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}
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void TextBrowserViewer::enableResources(bool enable) {
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qApp->settings()->setValue(GROUP(Messages), Messages::ShowResourcesInArticles, enable);
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setResourcesEnabled(enable);
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}
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void TextBrowserViewer::openLinkInExternalBrowser() {
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auto url = QUrl(anchorAt(m_lastContextMenuPos));
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if (url.isValid()) {
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const QUrl resolved_url = (m_currentUrl.isValid() && url.isRelative()) ? m_currentUrl.resolved(url) : url;
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qApp->web()->openUrlInExternalBrowser(resolved_url.toString());
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if (qApp->settings()
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->value(GROUP(Messages), SETTING(Messages::BringAppToFrontAfterMessageOpenedExternally))
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.toBool()) {
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QTimer::singleShot(1000, qApp, []() {
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qApp->mainForm()->display();
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});
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}
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}
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}
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void TextBrowserViewer::downloadLink() {
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auto url = QUrl(anchorAt(m_lastContextMenuPos));
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if (url.isValid()) {
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const QUrl resolved_url = (m_currentUrl.isValid() && url.isRelative()) ? m_currentUrl.resolved(url) : url;
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qApp->downloadManager()->download(resolved_url);
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}
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}
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void TextBrowserViewer::onAnchorClicked(const QUrl& url) {
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if (!url.isEmpty()) {
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const QUrl resolved_url = (m_currentUrl.isValid() && url.isRelative()) ? m_currentUrl.resolved(url) : url;
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bool open_externally_now =
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qApp->settings()->value(GROUP(Browser), SETTING(Browser::OpenLinksInExternalBrowserRightAway)).toBool();
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if (open_externally_now) {
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qApp->web()->openUrlInExternalBrowser(resolved_url.toString());
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}
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else {
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setUrl(resolved_url);
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}
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}
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}
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void TextBrowserViewer::setHtml(const QString& html, const QUrl& base_url) {
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if (m_resourcesEnabled) {
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static QRegularExpression img_tag_rgx("\\<img[^\\>]*src\\s*=\\s*[\"\']([^\"\']*)[\"\'][^\\>]*\\>",
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QRegularExpression::PatternOption::CaseInsensitiveOption |
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QRegularExpression::PatternOption::InvertedGreedinessOption);
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QRegularExpressionMatchIterator i = img_tag_rgx.globalMatch(html);
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QList<QUrl> found_resources;
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while (i.hasNext()) {
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QRegularExpressionMatch match = i.next();
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auto captured_url = base_url.isValid() ? base_url.resolved(QUrl(match.captured(1))) : QUrl(match.captured(1));
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if (!found_resources.contains(captured_url)) {
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found_resources.append(captured_url);
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}
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}
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auto really_needed_resources = boolinq::from(found_resources)
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.where([this](const QUrl& res) {
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return !m_loadedResources.contains(res);
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})
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.toStdList();
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m_neededResources = FROM_STD_LIST(QList<QUrl>, really_needed_resources);
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}
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else {
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m_neededResources = {};
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}
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setHtmlPrivate(html, base_url);
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if (!m_neededResources.isEmpty()) {
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QTimer::singleShot(20, this, &TextBrowserViewer::reloadHtmlDelayed);
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}
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setVerticalScrollBarPosition(0.0);
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// TODO: implement RTL for viewers somehow?
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/*
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auto to = document()->defaultTextOption();
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to.setTextDirection(Qt::LayoutDirection::RightToLeft);
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to.setAlignment(Qt::AlignmentFlag::AlignRight);
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document()->setDefaultTextOption(to);
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*/
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}
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void TextBrowserViewer::setHtmlPrivate(const QString& html, const QUrl& base_url) {
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m_currentUrl = base_url;
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QTextBrowser::setHtml(html);
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setZoomFactor(m_zoomFactor);
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emit pageTitleChanged(documentTitle());
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emit pageUrlChanged(base_url);
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}
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TextBrowserDocument::TextBrowserDocument(TextBrowserViewer* parent) : QTextDocument(parent) {
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m_viewer = parent;
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}
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QVariant TextBrowserDocument::loadResource(int type, const QUrl& name) {
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return m_viewer->loadOneResource(type, name);
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}
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void TextBrowserViewer::reloadHtmlDelayed() {
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if (!m_neededResources.isEmpty()) {
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downloadNextNeededResource();
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}
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}
|
|
|
|
void TextBrowserViewer::downloadNextNeededResource() {
|
|
if (m_neededResources.isEmpty()) {
|
|
// Everything is downloaded.
|
|
emit reloadDocument();
|
|
}
|
|
else {
|
|
QUrl res = m_neededResources.takeFirst();
|
|
|
|
m_resourceDownloader.data()->manipulateData(res.toString(),
|
|
QNetworkAccessManager::Operation::GetOperation,
|
|
{},
|
|
5000);
|
|
}
|
|
}
|
|
|
|
void TextBrowserViewer::resourceDownloaded(const QUrl& url, QNetworkReply::NetworkError status, QByteArray contents) {
|
|
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;
|
|
}
|