QtCollider/widgets/QcWebView.cpp

   1 /************************************************************************
   2 *
   3 * Copyright 2011 Jakob Leben (jakob.leben@gmail.com)
   4 *
   5 * This file is part of SuperCollider Qt GUI.
   6 *
   7 * This program is free software: you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation, either version 3 of the License, or
  10 * (at your option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 *
  20 ************************************************************************/
  21
  22 #include "QcWebView.h"
  23 #include "../QcWidgetFactory.h"
  24 #include <QWebPage>
  25 #include <QWebFrame>
  26 #include <QAction>
  27 #include <QShortcut>
  28 #include <QKeyEvent>
  29 #include <QApplication>
  30 #include <QStyle>
  31 #include <QClipboard>
  32
  33 static QcWidgetFactory<QtCollider::WebView> factory;
  34
  35 namespace QtCollider {
  36
  37 WebView::WebView( QWidget *parent ) :
  38   QWebView( parent ),
  39   _interpretSelection(false)
  40 {
  41   QtCollider::WebPage *page = new WebPage(this);
  42   page->setDelegateReload(true);
  43   setPage( page );
  44
  45   // Set the style's standard palette to avoid system's palette incoherencies
  46   // get in the way of rendering web pages
  47   setPalette( style()->standardPalette() );
  48
  49   QShortcut *scutCopy = new QShortcut( QKeySequence::Copy, this );
  50   scutCopy->setContext( Qt::WidgetWithChildrenShortcut );
  51   connect( scutCopy, SIGNAL(activated()),
  52            pageAction(QWebPage::Copy), SLOT(trigger()) );
  53
  54   connect( this, SIGNAL(linkClicked(QUrl)), this, SLOT(onLinkClicked(QUrl)) );
  55   connect( page->action(QWebPage::Reload), SIGNAL(triggered(bool)),
  56            this, SLOT(onPageReload()) );
  57
  58   connect( this, SIGNAL(interpret(QString)),
  59            qApp, SLOT(interpret(QString)),
  60            Qt::QueuedConnection );
  61 }
  62
  63 QString WebView::url() const
  64 {
  65   return QWebView::url().toString();
  66 }
  67
  68 void WebView::setUrl( const QString & str )
  69 {
  70   load( urlFromString(str) );
  71 }
  72
  73 QString WebView::html () const
  74 {
  75   return page()->mainFrame()->toHtml();
  76 }
  77
  78 void WebView::setHtml ( const QString &html, const QString &baseUrl )
  79 {
  80   QUrl url( baseUrl.isEmpty() ? QUrl() : urlFromString(baseUrl) );
  81   QWebView::setHtml( html, url );
  82 }
  83
  84 QString WebView::plainText () const
  85 {
  86   return page()->mainFrame()->toPlainText();
  87 }
  88
  89 QWebPage::LinkDelegationPolicy WebView::linkDelegationPolicy () const
  90 {
  91   return page()->linkDelegationPolicy();
  92 }
  93
  94 void WebView::setLinkDelegationPolicy ( QWebPage::LinkDelegationPolicy p )
  95 {
  96   page()->setLinkDelegationPolicy( p );
  97 }
  98
  99 bool WebView::delegateReload() const
 100 {
 101   WebPage *p = qobject_cast<QtCollider::WebPage*>(page());
 102   Q_ASSERT(p);
 103   return p->delegateReload();
 104 }
 105
 106 void WebView::setDelegateReload( bool flag )
 107 {
 108   WebPage *p = qobject_cast<QtCollider::WebPage*>(page());
 109   Q_ASSERT(p);
 110   p->setDelegateReload( flag );
 111 }
 112
 113 void WebView::setFontFamily( int generic, const QString & specific )
 114 {
 115   settings()->setFontFamily( (QWebSettings::FontFamily) generic, specific );
 116 }
 117
 118 void WebView::evaluateJavaScript ( const QString &script )
 119 {
 120   if( script.isEmpty() ) return;
 121   QWebFrame *frame = page()->currentFrame();
 122   if( frame ) frame->evaluateJavaScript( script );
 123 }
 124
 125 void WebView::findText( const QString &searchText, bool reversed )
 126 {
 127   QWebPage::FindFlags flags( QWebPage::FindWrapsAroundDocument );
 128   if( reversed ) flags |= QWebPage::FindBackward;
 129   QWebView::findText( searchText, flags );
 130 }
 131
 132 void WebView::onLinkClicked( const QUrl &url )
 133 {
 134   Q_EMIT( linkActivated( url.toString() ) );
 135 }
 136
 137 void WebView::onPageReload()
 138 {
 139   Q_EMIT( reloadTriggered( url() ) );
 140 }
 141
 142 void WebView::keyPressEvent( QKeyEvent *e )
 143 {
 144   if( _interpretSelection && e->modifiers() & (Qt::ControlModifier|Qt::ShiftModifier)
 145       && ( e->key() == Qt::Key_Return || e->key() == Qt::Key_Enter ) )
 146   {
 147     QString selection = selectedText();
 148     if( !selection.isEmpty() ) {
 149       Q_EMIT( interpret( selection ) );
 150       return;
 151     }
 152   }
 153
 154   QWebView::keyPressEvent( e );
 155 }
 156
 157
 158 void WebPage::triggerAction ( WebAction action, bool checked )
 159 {
 160   switch ( action ) {
 161     case QWebPage::Reload:
 162       if( _delegateReload ) return;
 163       break;
 164     case QWebPage::Copy:
 165       QApplication::clipboard()->setText( selectedText() );
 166       return;
 167     default: ;
 168   }
 169
 170   QWebPage::triggerAction( action, checked );
 171 }
 172
 173 } // namespace QtCollider