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tdelibs/khtml/khtmlview.h

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/* This file is part of the KDE project
Copyright (C) 1997 Martin Jones (mjones@kde.org)
(C) 1998 Waldo Bastian (bastian@kde.org)
(C) 1998, 1999 Torben Weis (weis@kde.org)
(C) 1999 Lars Knoll (knoll@kde.org)
(C) 1999 Antti Koivisto (koivisto@kde.org)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef KHTMLVIEW_H
#define KHTMLVIEW_H
// qt includes and classes
#include <tqscrollview.h>
#include <kdelibs_export.h>
class TQPainter;
class TQRect;
template< typename T > class TQValueVector;
namespace DOM {
class HTMLDocumentImpl;
class DocumentImpl;
class ElementImpl;
class HTMLElementImpl;
class HTMLTitleElementImpl;
class HTMLGenericFormElementImpl;
class HTMLFormElementImpl;
class HTMLAnchorElementImpl;
class HTMLInputElementImpl;
class Range;
class NodeImpl;
class CSSProperty;
}
namespace KJS {
class WindowFunc;
class ExternalFunc;
}
namespace khtml {
class RenderObject;
class RenderCanvas;
class RenderStyle;
class RenderLineEdit;
class RenderPartObject;
class RenderWidget;
class CSSStyleSelector;
class LineEditWidget;
class CaretBox;
void applyRule(DOM::CSSProperty *prop);
}
class KHTMLPart;
class KHTMLViewPrivate;
/**
* Renders and displays HTML in a TQScrollView.
*
* Suitable for use as an application's main view.
**/
class KHTML_EXPORT KHTMLView : public QScrollView
{
Q_OBJECT
friend class DOM::HTMLDocumentImpl;
friend class DOM::HTMLTitleElementImpl;
friend class DOM::HTMLGenericFormElementImpl;
friend class DOM::HTMLFormElementImpl;
friend class DOM::HTMLAnchorElementImpl;
friend class DOM::HTMLInputElementImpl;
friend class DOM::DocumentImpl;
friend class KHTMLPart;
friend class khtml::RenderCanvas;
friend class khtml::RenderObject;
friend class khtml::RenderLineEdit;
friend class khtml::RenderPartObject;
friend class khtml::RenderWidget;
friend class khtml::CSSStyleSelector;
friend class khtml::LineEditWidget;
friend class KJS::WindowFunc;
friend class KJS::ExternalFunc;
friend void khtml::applyRule(DOM::CSSProperty *prop);
public:
/**
* Constructs a KHTMLView.
*/
KHTMLView( KHTMLPart *part, TQWidget *parent, const char *name=0 );
virtual ~KHTMLView();
/**
* Returns a pointer to the KHTMLPart that is
* rendering the page.
**/
KHTMLPart *part() const { return m_part; }
int frameWidth() const { return _width; }
/**
* Sets a margin in x direction.
*/
void setMarginWidth(int x);
/**
* Returns the margin width.
*
* A return value of -1 means the default value will be used.
*/
int marginWidth() const { return _marginWidth; }
/*
* Sets a margin in y direction.
*/
void setMarginHeight(int y);
/**
* Returns the margin height.
*
* A return value of -1 means the default value will be used.
*/
int marginHeight() { return _marginHeight; }
/**
* Sets verticals scrollbar mode. Reimplemented for internal reasons.
*/
virtual void setVScrollBarMode ( ScrollBarMode mode );
/**
* Sets horizontal scrollbar mode. Reimplemented for internal reasons.
*/
virtual void setHScrollBarMode ( ScrollBarMode mode );
/**
* Prints the HTML document.
*/
void print();
/**
* Prints the HTML document.
* @param quick if true, fully automated printing, without print dialog
*/
void print( bool quick ); // KDE 4.0: merge with above
/**
* ensure the display is up to date
*/
void layout(); // KDE 4.0: make private
/**
* Display all accesskeys in small tooltips
*/
void displayAccessKeys();
signals:
/**
* This signal is used for internal layouting. Don't use it to check if rendering finished.
* Use @ref KHTMLPart completed() signal instead.
*/
void finishedLayout();
void cleared();
void zoomView( int );
void hideAccessKeys();
void repaintAccessKeys();
void findAheadActive( bool );
protected:
void clear();
virtual void resizeEvent ( TQResizeEvent * event );
virtual void showEvent ( TQShowEvent * );
virtual void hideEvent ( TQHideEvent *);
virtual bool focusNextPrevChild( bool next );
virtual void drawContents ( TQPainter * p, int clipx, int clipy, int clipw, int cliph );
virtual void drawContents( TQPainter* );
virtual void viewportMousePressEvent( TQMouseEvent * );
virtual void focusInEvent( TQFocusEvent * );
virtual void focusOutEvent( TQFocusEvent * );
virtual void viewportMouseDoubleClickEvent( TQMouseEvent * );
virtual void viewportMouseMoveEvent(TQMouseEvent *);
virtual void viewportMouseReleaseEvent(TQMouseEvent *);
virtual void viewportResizeEvent(TQResizeEvent*);
#ifndef QT_NO_WHEELEVENT
virtual void viewportWheelEvent(TQWheelEvent*);
#endif
virtual void dragEnterEvent( TQDragEnterEvent* );
virtual void dropEvent( TQDropEvent* );
virtual void closeEvent ( TQCloseEvent * );
virtual bool eventFilter(TQObject *, TQEvent *);
void keyPressEvent( TQKeyEvent *_ke );
void keyReleaseEvent ( TQKeyEvent *_ke );
void contentsContextMenuEvent ( TQContextMenuEvent *_ce );
void doAutoScroll();
void timerEvent ( TQTimerEvent * );
protected slots:
void slotPaletteChanged();
void slotScrollBarMoved();
private slots:
void tripleClickTimeout();
void findTimeout();
void accessKeysTimeout();
/**
* @internal
* @since 3.4
* used for autoscrolling with MMB
*/
void slotMouseScrollTimer();
private:
void scheduleRelayout(khtml::RenderObject* clippedObj=0);
void unscheduleRelayout();
void scheduleRepaint(int x, int y, int w, int h, bool asap=false);
void unscheduleRepaint();
bool needsFullRepaint() const;
void closeChildDialogs();
bool dialogsAllowed();
/**
* Paints the HTML document to a TQPainter.
* The document will be scaled to match the width of
* rc and clipped to fit in the height.
* yOff determines the vertical offset in the document to start with.
* more, if nonzero will be set to true if the documents extends
* beyond the rc or false if everything below yOff was painted.
**/
void paint(TQPainter *p, const TQRect &rc, int yOff = 0, bool *more = 0);
#if 0
/**
* Paints the HTML document to a TQPainter.
* The document will be scaled to match the width.
**/
void paint(TQPainter *p, int width);
#endif
/**
* Get/set the CSS Media Type.
*
* Media type is set to "screen" for on-screen rendering and "print"
* during printing. Other media types lack the proper support in the
* renderer and are not activated. The DOM tree and the parser itself,
* however, properly handle other media types. To make them actually work
* you only need to enable the media type in the view and if necessary
* add the media type dependent changes to the renderer.
*/
void setMediaType( const TQString &medium );
TQString mediaType() const;
bool pagedMode() const;
bool scrollTo(const TQRect &);
bool focusNextPrevNode(bool next);
bool handleAccessKey(const TQKeyEvent* ev);
bool focusNodeWithAccessKey(TQChar c, KHTMLView* caller = NULL);
TQMap< DOM::ElementImpl*, TQChar > buildFallbackAccessKeys() const;
void displayAccessKeys( KHTMLView* caller, KHTMLView* origview, TQValueVector< TQChar >& taken, bool use_fallbacks );
void useSlowRepaints();
void setIgnoreWheelEvents(bool e);
void init();
DOM::NodeImpl *nodeUnderMouse() const;
DOM::NodeImpl *nonSharedNodeUnderMouse() const;
void restoreScrollBar();
TQStringList formCompletionItems(const TQString &name) const;
void clearCompletionHistory(const TQString& name);
void addFormCompletionItem(const TQString &name, const TQString &value);
void addNonPasswordStorableSite( const TQString& host );
bool nonPasswordStorableSite( const TQString& host ) const;
bool dispatchMouseEvent(int eventId, DOM::NodeImpl *targetNode,
DOM::NodeImpl *targetNodeNonShared, bool cancelable,
int detail,TQMouseEvent *_mouse, bool setUnder,
int mouseEventType);
bool dispatchKeyEvent( TQKeyEvent *_ke );
bool dispatchKeyEventHelper( TQKeyEvent *_ke, bool generate_keypress );
void complete( bool pendingAction );
#ifndef KHTML_NO_TYPE_AHEAD_FIND
void findAhead(bool increase);
void updateFindAheadTimeout();
void startFindAhead( bool linksOnly );
#endif // KHTML_NO_TYPE_AHEAD_FIND
#ifndef KHTML_NO_CARET
// -- caret-related member functions (for caretMode as well as designMode)
/** initializes the caret if it hasn't been initialized yet.
*
* This method determines a suitable starting position, initializes
* the internal structures, and calculates the caret's coordinates ready
* for display.
*
* To "deinitialize" the caret, call caretOff
* @param keepSelection @p true to keep any active selection. It may have
* been extended if the caret position is changed.
*/
void initCaret(bool keepSelection = false);
/** returns whether the text under the caret will be overridden.
*/
bool caretOverrides() const;
/** ensures that the given element is properly focused.
*
* If not in caret mode or design mode, keyboard events are only regarded for
* focused nodes. Therefore, the function ensured that the focus will be
* properly set on unfocused nodes (or on a suitable ancestor).
* @param node node to focus
*/
void ensureNodeHasFocus(DOM::NodeImpl *node);
/** inquires the current caret position and stores it in the caret view
* context. Also resets the blink frequency timer. It will not display
* the caret on the canvas.
* @param hintBox caret box whose coordinates will be used if the
* caret position could not be determined otherwise.
*/
void recalcAndStoreCaretPos(khtml::CaretBox *hintBox = 0);
/** displays the caret and reinitializes the blink frequency timer.
*
* The caret will only be displayed on screen if the view has focus, or
* the caret display policy allows it. The same holds true for the blink
* frequency timer.
*/
void caretOn();
/** hides the caret and kills the blink frequency timer.
*
* These operations are executed unconditionally, regardless of the
* focus, and the caret display policy.
*/
void caretOff();
/** makes the caret visible, but does not influence the frequency timer.
* That means it probably won't get visible immediately.
*
* These operations are executed unconditionally, regardless of the
* focus, and the caret display policy.
* @param forceRepaint @p true to force an immediate repaint, otherwise
* do a scheduled repaint
*/
void showCaret(bool forceRepaint = false);
/** makes the caret invisible, but does not influence the frequency timer.
* The caret is immediately hidden.
*
* These operations are executed unconditionally, regardless of the
* focus, and the caret display policy.
*/
void hideCaret();
/** shifts the viewport to ensure that the caret is visible.
*
* Note: this will also work if the caret is hidden.
*/
void ensureCaretVisible();
/** folds the selection to the current caret position.
*
* Whatever selection has existed before will be removed by the invocation
* of this method. Updates are only done if an actual selection has
* been folded. After the call of this method, no selection will exist
* any more.
*
* No validity checking is done on the parameters. Note that the parameters
* refer to the old selection, the current caret may be way off.
* @param startNode starting node of selection
* @param startOffset offset within the start node.
* @param endNode ending node of selection
* @param endOffset offset within the end node.
* @return @p true if there had been a selection, and it was folded.
*/
bool foldSelectionToCaret(DOM::NodeImpl *startNode, long startOffset,
DOM::NodeImpl *endNode, long endOffset);
/** places the caret on the current position.
*
* The caret is switched off, the position recalculated with respect to
* the new position. The caret will only be redisplayed if it is on an
* editable node, in design mode, or in caret mode.
* @param hintBox caret box whose coordinates will be used if the
* caret position could not be determined otherwise.
* @return @p true if the caret has been displayed.
*/
bool placeCaret(khtml::CaretBox *hintBox = 0);
/** extends the selection up to the current caret position.
*
* When a selection exists, the function adds/removes pieces from the
* beginning/end of the selection up to the current caret position.
*
* The selection values are *not* normalized, i. e. the resulting end
* position may actually precede the starting position.
*
* No validity checking is done on the parameters. Note that the parameters
* refer to the old selection, the current caret may be way off.
* @param startNode starting node of selection
* @param startOffset offset within the start node.
* @param endNode ending node of selection
* @param endOffset offset within the end node.
* @return @p true when the current selection has been changed
*/
bool extendSelection(DOM::NodeImpl *startNode, long startOffset,
DOM::NodeImpl *endNode, long endOffset);
/** updates the selection from the last to the current caret position.
*
* No validity checking is done on the parameters. Note that the parameters
* refer to the old selection, the current caret may be way off.
* @param startNode starting node of selection
* @param startOffset offset within the start node.
* @param endNode ending node of selection
* @param endOffset offset within the end node.
*/
void updateSelection(DOM::NodeImpl *startNode, long startOffset,
DOM::NodeImpl *endNode, long endOffset);
/**
* Returns the current caret policy when the view is not focused.
* @return a KHTMLPart::CaretDisplay value
*/
int caretDisplayPolicyNonFocused() const;
/**
* Sets the caret display policy when the view is not focused.
* @param policy new display policy as
* defined by KHTMLPart::CaretDisplayPolicy
* @since 3.2
*/
void setCaretDisplayPolicyNonFocused(int policy);
// -- caret event handler
/**
* Evaluates key presses on editable nodes.
*/
void caretKeyPressEvent(TQKeyEvent *);
// -- caret navigation member functions
/** moves the caret to the given position and displays it.
*
* If the node resembles an invalid position, the function sets the caret to a
* nearby node that is valid.
*
* @param node node to be set to
* @param offset zero-based offset within this node
* @param clearSelection @p true if any selection should be cleared
* as well.
* @return @p true if a previously existing selection has been changed.
*/
bool moveCaretTo(DOM::NodeImpl *node, long offset, bool clearSelection);
/**
* Movement enumeration
* @li CaretByCharacter move caret character-wise
* @li CaretByWord move caret word-wise
*/
enum CaretMovement { CaretByCharacter, CaretByWord };
/** moves the caret.
*
* @param next @p true, move towards the following content, @p false,
* move towards the previous
* @param cmv CaretMovement operation
* @param n count the CaretMovement has to be carried out.
* For latin documents, a positive number means moving the caret
* these many characters to the right/downwards, a negative number
* to the left/upwards. For RTL documents, the opposite applies.
*/
void moveCaretBy(bool next, CaretMovement cmv, int n);
/** moves the caret by line.
*/
void moveCaretByLine(bool next, int n);
/** moves the caret to the given line boundary.
* @param end @p true if the caret is to be moved to the end of the line,
* otherwise to the beginning.
*/
void moveCaretToLineBoundary(bool end);
/** moves the caret to the given document boundary.
* @param end @p true if the caret is to be moved to the end of the
* document, otherwise to the beginning.
*/
void moveCaretToDocumentBoundary(bool end);
/** does the actual caret placement so that it becomes visible at
* the new position.
*
* This method is only suitable if the new caret position has already been
* determined.
* @param hintBox caret box whose coordinates will be used if the
* caret position could not be determined otherwise.
*/
void placeCaretOnChar(khtml::CaretBox *hintBox);
/** does the actual caret placement so that it becomes visible at
* the new position.
*
* Additionally, it calculates the new caret position from the given
* box and coordinates.
*
* @param caretBox caret box serving as a measurement point for offset.
* @param x x-coordinate relative to containing block. The offset will
* be approximated as closely as possible to this coordinate,
* but never less than caretBox->xPos() and greater than
* caretBox->xPos() + caretBox->width()
* @param absx absolute x-coordinate of containing block, needed for
* calculation of final caret position
* @param absy absolute y-coordinate of containing block, needed for
* calculation of final caret position
*/
void placeCaretOnLine(khtml::CaretBox *caretBox, int x, int absx, int absy);
/** moves the caret by a page length.
* @param next @p true, move down, @p false, move up.
*/
void moveCaretByPage(bool next);
/** moves the caret to the beginning of the previous word.
*/
void moveCaretPrevWord();
/** moves the caret to the beginning of the next word.
*/
void moveCaretNextWord();
/** moves the caret to the previous line.
*
* @param n number of lines to move caret
*/
void moveCaretPrevLine(int n = 1);
/** moves the caret to the following line.
*
* @param n number of lines to move caret
*/
void moveCaretNextLine(int n = 1);
/** moves the caret to the previous page
*/
void moveCaretPrevPage();
/** moves the caret to the next page
*/
void moveCaretNextPage();
/** moves the caret to the beginning of the current line.
*/
void moveCaretToLineBegin();
/** moves the caret to the end of the current line.
*/
void moveCaretToLineEnd();
#endif // KHTML_NO_CARET
// ------------------------------------- member variables ------------------------------------
private:
void setWidgetVisible(::khtml::RenderWidget*, bool visible);
int _width;
int _height;
int _marginWidth;
int _marginHeight;
KHTMLPart *m_part;
KHTMLViewPrivate *d;
TQString m_medium; // media type
};
#endif
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