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qvido/htmlarea.cpp

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/***************************************************************************
* Copyright (C) 2010 by Mirko Lindner *
* mirko@sharism.cc *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
// #include <iostream>
#include <QtGui>
#include <QMessageBox>
#include <QTextBrowser>
#include <string>
#include <sstream>
// #include <vector>
#include "qmain.h"
#include <zim/file.h>
#include <zim/search.h>
#include <zim/fileimpl.h>
#include <cxxtools/log.h>
log_define("qvido.htmlarea");
bool UserEventFilter::eventFilter(QObject *obj, QEvent *event)
{
if (event->type() == QEvent::KeyPress) {
QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
log_debug("Ate key press " << keyEvent->key());
return true;
} else {
// standard event processing
return QObject::eventFilter(obj, event);
}
}
///////////////////////////////////////////
// Functions related to htmlarea
void HtmlArea::linking( const QUrl &txt ){
QString str = txt.toString();
// // check if url is an internal anchor if yes jump if not end request and query zimlib
if (str.startsWith("#") == 1){
this->scrollToAnchor(str);
}else{
log_debug(str.toUtf8().data());
this->setSource(this->source());
this->setNewContent(1, str);
}
}
void HtmlArea::setNewContent( int method, QString str = "" ){
qobject_cast<QMain *>(this->parentWidget())->setEnabled(false);
QString current = this->toHtml();
this->setText("<html><body><br/><br/><br/><br/><p>Loading ... </p></body></html>");
qApp->processEvents();
zim::Article article;
if (method == 0){
article = this->getRandomArticle();
}else if( method == 1){
article = this->getArticleFromUrl(str);
}else if( method == 2){
// first search
zim::Search::Results result = this->searchArticleFromTitle(str);
// if result = 1 display article
if (result.size() == 1){
log_debug("result size 1");
//create ZIM file accessor
zim::File file = this->get_file();
article = file.getArticle(result[0].getArticle().getIndex());
}
// if result > 1 display options return at end
else if (result.size() > 1){
log_debug("more than one result");
QString res;
for (unsigned i = 0; i < result.size(); ++i)
{
res.append("<li><a href='" + QString::fromUtf8(result[i].getArticle().getUrl().c_str()) + "'>" + QString::fromUtf8(result[i].getArticle().getTitle().c_str()) + "</a></li>");
}
this->setText(res);
qApp->processEvents();
qobject_cast<QMain *>(this->parentWidget())->setEnabled(true);
return;
}
}
//check if article is valid, if display if not show error
if (article.good()){
log_debug("article is good");
this->url = QString::fromUtf8(article.getUrl().c_str());
log_debug("Url set");
//TODO build history, set Title
//TODO certain zimfiles break here
// example full german file breaks here with article "Trockenrasierer"
std::string content = "<a name=\"top\"></a>";
content.append(article.getPage());
this->setText(QString::fromUtf8(content.c_str()));
log_debug("Text set");
// log_debug("index: " << article.getIndex());
// log_debug("enabled: " << this->isEnabled());
qApp->processEvents();
qobject_cast<QMain *>(this->parentWidget())->setEnabled(true);
log_debug("string: " << str.toUtf8().data());
}else{
this->setText(current);
//construct error text
QString errText = "The article you requested (";
errText.append(str);
errText.append(") could not be found.");
log_debug("string: " << str.toUtf8().data());
qApp->processEvents();
qobject_cast<QMain *>(this->parentWidget())->setEnabled(true);
//construct and display error box
QMessageBox::information(qobject_cast<QMain *>(this->parentWidget()), "Error",
errText,
QMessageBox::Close);
}
}
// // slots
// // TODO ...is there any way to connect setNewContent to Actions directly using default values?
void HtmlArea::getRandom(){
log_debug("getRandom called");
if(this->isEnabled()){
this->setNewContent( 0 );
}
}
void HtmlArea::searchArticle(QString term){
log_debug("searchArticle called");
if(this->isEnabled()){
this->setNewContent( 2 , term);
}
}
void HtmlArea::goToTop(){
this->scrollToAnchor("#top");
}
//
////////////////////////////////////////////
////////////////////////////////////////////
// Debug functions
void HtmlArea::sourceChange( const QUrl &txt ){
QString str = txt.toString();
log_debug("source: " << str.toStdString());
}
//
////////////////////////////////////////////
//reimplimentations
QVariant HtmlArea::loadResource(int type, const QUrl &name)
{
QVariant qv;
// check if requested resource is an image
if (type == 2){
zim::Article article;
article = getArticleFromUrl(name.toString());
if(article.good()){
QString mtype(article.getMimeType().c_str());
QByteArray data = QByteArray::fromRawData(article.getData().data(), article.getData().size());
QImage img;
mtype.remove("image/");
img.loadFromData(data, mtype.toUpper().toLatin1());
// log_debug("index: " << article.getIndex() << " height: " << article.getData().size() << " mtype: " << std::string(mtype.toUpper().toLatin1()));
qv = img;
}
}
return qv;
}
////////////////////////////////////////////
// Zimlib functions
const zim::File& HtmlArea::get_file()
{
static zim::File zimFile;
if (!zimFile.good())
{
zimFile = zim::File(qobject_cast<QMain *>(this->parentWidget())->fileLocation);
log_debug("number of articles: " << zimFile.getCountArticles());
}
return zimFile;
}
//get random article
zim::Article HtmlArea::getRandomArticle(){
//get file
zim::File file = this->get_file();
//create empty article
zim::Article article;
// log_debug("before random loop");
do
{
// generate random number
unsigned int seed = static_cast<unsigned int>(time(0));
zim::size_type idx = static_cast<zim::size_type>(static_cast<double>(file.getCountArticles()) * rand_r(&seed) / RAND_MAX);
//retrieve article
article = file.getArticle(idx);
// article = file.getArticle(151);
log_debug("idx: " << idx);
//loop in case article is redirect
// log_debug("before redirect loop");
do
{
article = article.getRedirectArticle();
log_debug("random url: " << article.getUrl());
}while(article.isRedirect());
}while(article.getUrl() == this->url.toStdString());
// log_debug("after random loop");
return article;
}
zim::Article HtmlArea::getArticleFromUrl(QString url)
{
// TODO unescape url
//create ZIM file accessor
zim::File file = this->get_file();
//create empty article
zim::Article article;
// remove '+' signs
QString term = url.replace( '+', ' ');
//set default namespace
char ns = 'A';
//check for different namespace
if (term.contains("/"))
{
if(term.startsWith("/")){
term.remove(0,1);
}
int index = term.indexOf("/");
if ( index == 1)
{
ns = term[0].toLatin1();
term.remove(0, 2);
}
//TODO what was this for?
/*
else
{
term.erase(1);
ns = term[0];
found2 = term.find("/");
term.erase(0, term.indexOf("/"));
}*/
}
// // // try to retrieve article
try
{
article = file.getArticle(ns, term.toUtf8().data());
// QString mtype(article.getMimeType().c_str());
// if(mtype.contains("image/") == false){
// log_debug("term :" << term.toStdString());
// }
return article;
}
catch (const std::exception& e)
{
std::cerr << e.what() << std::endl;
}
}
zim::Search::Results HtmlArea::searchArticleFromTitle(QString phrase)
{
char ns;
ns = 'A';
zim::File file = get_file();
zim::Article article;
zim::Search::Results result;
zim::Search search(file);
search.setSearchLimit(25);
char *terms = phrase.toUtf8().data();
search.find(result, ns, terms);
log_debug("term :" << phrase.toUtf8().data());
return result;
}
///////////////////////////////////
// functions related to navigation
void HtmlArea::keyPressEvent(QKeyEvent *e){
log_debug("key pressed");
switch (e->key()) {
case Qt::Key_Right:
{
// QPoint pos = qobject_cast<QMain *>(this->parentWidget())->cursor().pos();
// qobject_cast<QMain *>(this->parentWidget())->cursor().setPos(pos.x() + 5, pos.y());
// QPoint pos2 = qobject_cast<QMain *>(this->parentWidget())->cursor().pos();
// log_debug("y: " << pos2.y() << " x: " << pos2.x());
QPoint pos = qApp->overrideCursor()->pos();
qApp->overrideCursor()->setPos(pos.x() + 5, pos.y());
}
return;
case Qt::Key_Left:
{
QPoint pos = qApp->overrideCursor()->pos();
qApp->overrideCursor()->setPos(pos.x() - 5, pos.y());
}
return;
case Qt::Key_Down:
{
QPoint pos = qApp->overrideCursor()->pos();
qApp->overrideCursor()->setPos(pos.x(), pos.y() + 5);
}
return;
case Qt::Key_Up:
{
QPoint pos = qApp->overrideCursor()->pos();
qApp->overrideCursor()->setPos(pos.x(), pos.y() - 5);
}
return;
}
QTextBrowser::keyPressEvent(e);
}
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