mirror of
https://github.com/RetroShare/RetroShare.git
synced 2025-05-02 06:06:10 -04:00
FeedReader plugin:
- added new classes for XML/HTML parse and modify - added basic error handling - added new GUI for a preview and a tree to show the structure of the page (will be continued) git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-gxs-b1@5412 b45a01b8-16f6-495d-af2f-9b41ad6348cc
This commit is contained in:
thunder2
parent
acaefada65
commit
f51af0d4de
24 changed files with 1959 additions and 509 deletions
427
plugins/FeedReader/gui/PreviewFeedDialog.cpp
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427
plugins/FeedReader/gui/PreviewFeedDialog.cpp
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/****************************************************************
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* RetroShare GUI is distributed under the following license:
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*
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* Copyright (C) 2012 by Thunder
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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****************************************************************/
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#include <QPainter>
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#include "PreviewFeedDialog.h"
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#include "ui_PreviewFeedDialog.h"
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#include "FeedReaderNotify.h"
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#include "FeedReaderStringDefs.h"
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#include "util/HandleRichText.h"
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#include "interface/rsFeedReader.h"
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#include "retroshare/rsiface.h"
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#include "util/HTMLWrapper.h"
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#include <algorithm>
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// not yet functional
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//PreviewItemDelegate::PreviewItemDelegate(QTreeWidget *parent) : QItemDelegate(parent)
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//{
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// connect(parent->header(), SIGNAL(sectionResized(int,int,int)), SLOT(sectionResized(int,int,int)));
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//}
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//void PreviewItemDelegate::sectionResized(int logicalIndex, int /*oldSize*/, int /*newSize*/)
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//{
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// QHeaderView *header = dynamic_cast<QHeaderView*>(sender());
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// if (header) {
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// QTreeWidget *treeWidget = dynamic_cast<QTreeWidget*>(header->parent());
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// if (treeWidget) {
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// QModelIndex index = treeWidget->model()->index(0, logicalIndex, QModelIndex());
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// emit sizeHintChanged(index);
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// }
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// }
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//}
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//void PreviewItemDelegate::drawDisplay(QPainter *painter, const QStyleOptionViewItem &option, const QRect &rect, const QString &text) const
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//{
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// QPen pen(painter->pen());
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// QFont font(painter->font());
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// QPalette::ColorGroup colorgroup(option.state & QStyle::State_Enabled ? QPalette::Normal : QPalette::Disabled);
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// QTextOption textOption;
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// textOption.setWrapMode(QTextOption::WrapAnywhere);
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// textOption.setAlignment(option.displayAlignment);
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// QRect textRect = rect.adjusted(5, 0, -5, 0); // remove width padding
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// textRect.setTop(qMin(rect.top(), option.rect.top()));
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// textRect.setHeight(qMax(rect.height(), option.rect.height()));
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// if (option.state & QStyle::State_Selected) {
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// painter->fillRect(rect, option.palette.brush(colorgroup, QPalette::Highlight));
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// painter->setPen(option.palette.color(colorgroup, QPalette::HighlightedText));
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// } else {
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// painter->setPen(option.palette.color(colorgroup, QPalette::Text));
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// }
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// if (option.state & QStyle::State_Editing) {
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// painter->save();
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// painter->setPen(option.palette.color(colorgroup, QPalette::Text));
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// painter->drawRect(rect.adjusted( 0, 0, -1, -1));
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// painter->restore();
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// }
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// painter->setFont(option.font);
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// painter->drawText(textRect, text, textOption);
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// // reset painter
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// painter->setFont(font);
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// painter->setPen(pen);
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//}
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//void PreviewItemDelegate::drawFocus(QPainter *painter, const QStyleOptionViewItem &option, const QRect &rect) const
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//{
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// if (option.state & QStyle::State_HasFocus) {
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// QRect textRect(rect);
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// textRect.setTop(qMin(rect.top(), option.rect.top()));
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// textRect.setHeight(qMax(rect.height(), option.rect.height()));
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// QStyleOptionFocusRect optionFocusRect;
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// optionFocusRect.QStyleOption::operator=(option);
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// optionFocusRect.rect = textRect;
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// optionFocusRect.state |= QStyle::State_KeyboardFocusChange;
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// QPalette::ColorGroup colorgroup = (option.state & QStyle::State_Enabled) ? QPalette::Normal : QPalette::Disabled;
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// optionFocusRect.backgroundColor = option.palette.color(colorgroup, (option.state & QStyle::State_Selected) ? QPalette::Highlight : QPalette::Background);
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// QApplication::style()->drawPrimitive(QStyle::PE_FrameFocusRect, &optionFocusRect, painter);
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// }
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//}
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//QSize PreviewItemDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
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//{
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//// static bool inSizeHint = false;
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//// if (inSizeHint) {
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//// return QSize();
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//// }
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//// inSizeHint = true;
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// //d->viewport->width()
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// QSize size = QItemDelegate::sizeHint(option, index);
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// size.setHeight(50);
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//// QTreeWidget *treeWidget = dynamic_cast<QTreeWidget*>(parent());
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//// if (treeWidget) {
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//// size.setWidth(treeWidget->header()->sectionSize(index.column()));
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//// QString text = index.data(Qt::DisplayRole).toString();
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//// QRect displayRect = textRectangle(NULL, QRect(0, 0, size.width(), size.height()), option.font, text);
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//// QRect displayRect = treeWidget->visualRect(index);
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//// int width = treeWidget->columnWidth(index.column());
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//// int height = option.fontMetrics.boundingRect(QRect(0, 0, size.width(), 0), Qt::TextWrapAnywhere | Qt::TextLongestVariant, text).height();
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//// if (height > size.height()) {
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//// size.setHeight(height);
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//// }
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//// }
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//// inSizeHint = false;
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// return size;
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//}
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PreviewFeedDialog::PreviewFeedDialog(RsFeedReader *feedReader, FeedReaderNotify *notify, const FeedInfo &feedInfo, QWidget *parent) :
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QDialog(parent), mFeedReader(feedReader), mNotify(notify), ui(new Ui::PreviewFeedDialog)
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{
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ui->setupUi(this);
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ui->feedNameLabel->clear();
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ui->feedInfoLabel->clear();
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/* connect signals */
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connect(ui->previousPushButton, SIGNAL(clicked()), this, SLOT(previousMsg()));
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connect(ui->nextPushButton, SIGNAL(clicked()), this, SLOT(nextMsg()));
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connect(ui->documentButton, SIGNAL(toggled(bool)), this, SLOT(showDocumentFrame(bool)));
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connect(mNotify, SIGNAL(notifyFeedChanged(QString,int)), this, SLOT(feedChanged(QString,int)));
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connect(mNotify, SIGNAL(notifyMsgChanged(QString,QString,int)), this, SLOT(msgChanged(QString,QString,int)));
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// ui->documentTreeWidget->setItemDelegate(new PreviewItemDelegate(ui->documentTreeWidget));
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showDocumentFrame(false);
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if (!mFeedReader->addPreviewFeed(feedInfo, mFeedId)) {
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setInfo(tr("Cannot create preview"));
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}
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updateMsgCount();
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}
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PreviewFeedDialog::~PreviewFeedDialog()
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{
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disconnect(mNotify);
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disconnect(mNotify);
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if (!mFeedId.empty()) {
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mFeedReader->removeFeed(mFeedId);
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}
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delete ui;
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}
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void PreviewFeedDialog::feedChanged(const QString &feedId, int type)
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{
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if (feedId.isEmpty()) {
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return;
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}
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if (feedId.toStdString() != mFeedId) {
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return;
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}
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if (type == NOTIFY_TYPE_DEL) {
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/* feed deleted */
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mFeedId.clear();
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return;
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}
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if (type == NOTIFY_TYPE_ADD || type == NOTIFY_TYPE_MOD) {
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FeedInfo feedInfo;
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if (!mFeedReader->getFeedInfo(mFeedId, feedInfo)) {
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return;
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}
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fillFeedInfo(feedInfo);
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}
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}
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void PreviewFeedDialog::msgChanged(const QString &feedId, const QString &msgId, int type)
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{
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if (feedId.isEmpty() || msgId.isEmpty()) {
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return;
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}
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if (feedId.toStdString() != mFeedId) {
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return;
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}
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switch (type) {
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case NOTIFY_TYPE_ADD:
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if (mMsgId.empty()) {
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mMsgId = msgId.toStdString();
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updateMsg();
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}
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break;
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case NOTIFY_TYPE_MOD:
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if (mMsgId == msgId.toStdString()) {
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updateMsg();
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}
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break;
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case NOTIFY_TYPE_DEL:
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if (mMsgId == msgId.toStdString()) {
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std::list<std::string>::iterator it = std::find(mMsgIds.begin(), mMsgIds.end(), mMsgId);
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if (it != mMsgIds.end()) {
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++it;
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if (it != mMsgIds.end()) {
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mMsgId = *it;
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} else {
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--it;
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if (it != mMsgIds.begin()) {
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--it;
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mMsgId = *it;
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} else {
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mMsgId.clear();
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}
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}
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updateMsg();
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}
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}
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break;
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}
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/* calculate message count */
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mMsgIds.clear();
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mFeedReader->getFeedMsgIdList(mFeedId, mMsgIds);
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updateMsgCount();
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}
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void PreviewFeedDialog::showDocumentFrame(bool show)
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{
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ui->documentFrame->setVisible(show);
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ui->documentButton->setChecked(show);
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if (show) {
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ui->documentButton->setToolTip(tr("Hide tree"));
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ui->documentButton->setIcon(QIcon(":images/hide_toolbox_frame.png"));
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fillDocumentTree();
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} else {
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ui->documentButton->setToolTip(tr("Show tree"));
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ui->documentButton->setIcon(QIcon(":images/show_toolbox_frame.png"));
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}
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}
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int PreviewFeedDialog::getMsgPos()
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{
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int pos = -1;
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std::list<std::string>::iterator it;
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for (it = mMsgIds.begin(); it != mMsgIds.end(); ++it) {
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++pos;
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if (*it == mMsgId) {
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break;
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}
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}
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return pos;
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}
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void PreviewFeedDialog::setInfo(const QString &info)
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{
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ui->feedInfoLabel->setText(info);
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ui->infoLabel->setVisible(!info.isEmpty());
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ui->feedInfoLabel->setVisible(!info.isEmpty());
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}
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void PreviewFeedDialog::fillFeedInfo(const FeedInfo &feedInfo)
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{
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QString name = feedInfo.name.empty() ? tr("No name") : QString::fromUtf8(feedInfo.name.c_str());
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QString workState = FeedReaderStringDefs::workState(feedInfo.workstate);
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if (!workState.isEmpty()) {
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name += QString(" (%1)").arg(workState);
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}
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ui->feedNameLabel->setText(name);
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setInfo(FeedReaderStringDefs::errorString(feedInfo));
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}
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void PreviewFeedDialog::previousMsg()
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{
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std::list<std::string>::iterator it = std::find(mMsgIds.begin(), mMsgIds.end(), mMsgId);
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if (it != mMsgIds.end()) {
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if (it != mMsgIds.begin()) {
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--it;
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mMsgId = *it;
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updateMsg();
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updateMsgCount();
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}
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}
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}
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void PreviewFeedDialog::nextMsg()
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{
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std::list<std::string>::iterator it = std::find(mMsgIds.begin(), mMsgIds.end(), mMsgId);
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if (it != mMsgIds.end()) {
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++it;
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if (it != mMsgIds.end()) {
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mMsgId = *it;
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updateMsg();
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updateMsgCount();
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}
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}
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}
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void PreviewFeedDialog::updateMsgCount()
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{
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int pos = getMsgPos();
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ui->messageCountLabel->setText(QString("%1/%2").arg(pos + 1).arg(mMsgIds.size()));
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ui->previousPushButton->setEnabled(pos > 0);
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ui->nextPushButton->setEnabled(pos + 1 < (int) mMsgIds.size());
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}
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void PreviewFeedDialog::updateMsg()
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{
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FeedMsgInfo msgInfo;
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if (mMsgId.empty() || !mFeedReader->getMsgInfo(mFeedId, mMsgId, msgInfo)) {
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ui->msgTitle->clear();
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ui->msgText->clear();
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mDescription.clear();
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return;
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}
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mDescription = msgInfo.description;
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QString msgTxt = RsHtml().formatText(ui->msgText->document(), QString::fromUtf8(mDescription.c_str()), RSHTML_FORMATTEXT_EMBED_LINKS);
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ui->msgText->setHtml(msgTxt);
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ui->msgTitle->setText(QString::fromUtf8(msgInfo.title.c_str()));
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ui->documentTreeWidget->clear();
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fillDocumentTree();
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}
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static void examineChildElements(QTreeWidget *treeWidget, HTMLWrapper &html, xmlNodePtr node, QTreeWidgetItem *parentItem)
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{
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QTreeWidgetItem *item = new QTreeWidgetItem;
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QString text;
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if (node->type == XML_ELEMENT_NODE) {
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text = QString("<%1 ").arg(QString::fromUtf8(html.nodeName(node).c_str()));
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for (xmlAttrPtr attr = node->properties; attr; attr = attr->next) {
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QString value = QString::fromUtf8(html.getAttr(node, attr).c_str());
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if (value.length() > 100) {
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value = value.left(100) + "...";
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}
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text += QString("%1=\"%2\" ").arg(QString::fromUtf8(html.attrName(attr).c_str()), value);
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}
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text = text.trimmed() + ">";
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} else {
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std::string content;
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if (html.getContent(node, content)) {
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text = QString::fromUtf8(content.c_str());
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} else {
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text = QApplication::translate("PreviewFeedDialog", "Error getting content");
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}
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}
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item->setText(0, text);
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parentItem->addChild(item);
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// QLabel *label = new QLabel(text);
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// label->setTextFormat(Qt::PlainText);
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// label->setWordWrap(true);
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// treeWidget->setItemWidget(item, 0, label);
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item->setExpanded(true);
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for (xmlNodePtr child = node->children; child; child = child->next) {
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examineChildElements(treeWidget, html, child, item);
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}
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}
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void PreviewFeedDialog::fillDocumentTree()
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{
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if (!ui->documentTreeWidget->isVisible()) {
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return;
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}
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if (ui->documentTreeWidget->topLevelItemCount() > 0) {
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return;
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}
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if (mDescription.empty()) {
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return;
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}
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HTMLWrapper html;
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if (!html.readHTML(mDescription.c_str(), "")) {
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QTreeWidgetItem *item = new QTreeWidgetItem;
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item->setText(0, tr("Error parsing document"));
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ui->documentTreeWidget->addTopLevelItem(item);
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return;
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}
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xmlNodePtr root = html.getRootElement();
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if (!root) {
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return;
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}
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examineChildElements(ui->documentTreeWidget, html, root, ui->documentTreeWidget->invisibleRootItem());
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}
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