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318 lines
12 KiB
C++
318 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsView_h___
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#define nsView_h___
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#include "nsIView.h"
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#include "nsIWidget.h"
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#include "nsRegion.h"
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#include "nsRect.h"
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#include "nsCRT.h"
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#include "nsIFactory.h"
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#include "nsIViewObserver.h"
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#include "nsEvent.h"
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#include <stdio.h>
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//mmptemp
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class nsIRegion;
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class nsIRenderingContext;
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class nsIViewManager;
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class nsViewManager;
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class nsZPlaceholderView;
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// View flags private to the view module
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// indicates that the view is or contains a placeholder view
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#define NS_VIEW_FLAG_CONTAINS_PLACEHOLDER 0x0100
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// Flag to determine whether the view will check if events can be handled
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// by its children or just handle the events itself
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#define NS_VIEW_FLAG_DONT_CHECK_CHILDREN 0x0200
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// indicates that the view should not be bitblt'd when moved
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// or scrolled and instead must be repainted
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#define NS_VIEW_FLAG_DONT_BITBLT 0x0400
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// set if this view is clipping its normal descendants
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// to its bounds. When this flag is set, child views
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// bounds need not be inside this view's bounds.
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#define NS_VIEW_FLAG_CLIP_CHILDREN_TO_BOUNDS 0x0800
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// set if this view is clipping its descendants (including
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// placeholders) to its bounds
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#define NS_VIEW_FLAG_CLIP_PLACEHOLDERS_TO_BOUNDS 0x1000
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// set if this view has positioned its widget at least once
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#define NS_VIEW_FLAG_HAS_POSITIONED_WIDGET 0x2000
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class nsView : public nsIView_MOZILLA_1_8_BRANCH
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{
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public:
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nsView(nsViewManager* aViewManager = nsnull,
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nsViewVisibility aVisibility = nsViewVisibility_kShow);
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NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
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NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
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/**
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* Called to indicate that the specified rect of the view
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* needs to be drawn via the rendering context. The rect
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* is specified in view coordinates.
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* @param rc rendering context to paint into
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* @param rect damage area
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* @param aPaintFlags see nsIView.h for flag definitions
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* @return PR_TRUE if the entire clip region has been eliminated, else PR_FALSE
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*/
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NS_IMETHOD Paint(nsIRenderingContext& rc, const nsRect& rect,
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PRUint32 aPaintFlags, PRBool &aResult);
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/**
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* Called to indicate that the specified region of the view
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* needs to be drawn via the rendering context. The region
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* is specified in view coordinates.
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* @param rc rendering context to paint into
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* @param region damage area
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* @param aPaintFlags see nsIView.h for flag definitions
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* @return PR_TRUE if the entire clip region has been eliminated, else PR_FALSE
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*/
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NS_IMETHOD Paint(nsIRenderingContext& rc, const nsIRegion& region,
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PRUint32 aPaintFlags, PRBool &aResult);
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/**
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* Called to indicate that the position of the view has been changed.
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* The specified coordinates are in the parent view's coordinate space.
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* @param x new x position
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* @param y new y position
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*/
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virtual void SetPosition(nscoord aX, nscoord aY);
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/**
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* Called to indicate that the dimensions of the view have been changed.
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* The x and y coordinates may be < 0, indicating that the view extends above
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* or to the left of its origin position.
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*/
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virtual void SetDimensions(const nsRect &aRect, PRBool aPaint = PR_TRUE,
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PRBool aResizeWidget = PR_TRUE);
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void GetDimensions(nsRect &aRect) const { aRect = mDimBounds; aRect.x -= mPosX; aRect.y -= mPosY; }
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void GetDimensions(nsSize &aSize) const { aSize.width = mDimBounds.width; aSize.height = mDimBounds.height; }
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/**
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* This checks whether the view is a placeholder for some view that has
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* been reparented to a different geometric parent.
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*/
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virtual PRBool IsZPlaceholderView() const { return PR_FALSE; }
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/**
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* Called to set the clip of the children of this view.
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* The clip is relative to the origin of the view.
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* All of the children of this view will be clipped using
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* the specified rectangle
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*/
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void SetClipChildrenToRect(const nsRect* aRect) {
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if (!aRect) {
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delete mClipRect;
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mClipRect = nsnull;
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} else {
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if (mClipRect) {
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*mClipRect = *aRect;
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} else {
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mClipRect = new nsRect(*aRect);
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}
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}
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}
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void SetClipChildrenToBounds(PRBool aDoClip) {
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mVFlags = (mVFlags & ~NS_VIEW_FLAG_CLIP_CHILDREN_TO_BOUNDS)
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| (aDoClip ? NS_VIEW_FLAG_CLIP_CHILDREN_TO_BOUNDS : 0);
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}
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void SetClipPlaceholdersToBounds(PRBool aDoClip) {
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mVFlags = (mVFlags & ~NS_VIEW_FLAG_CLIP_PLACEHOLDERS_TO_BOUNDS)
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| (aDoClip ? NS_VIEW_FLAG_CLIP_PLACEHOLDERS_TO_BOUNDS : 0);
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}
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/**
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* Called to get the dimensions and position of the clip for the children of this view.
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*/
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const nsRect* GetClipChildrenToRect() const
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{ return mClipRect; }
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PRBool GetClipChildrenToBounds(PRBool aPlaceholders) const
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{ return (mVFlags & (aPlaceholders ? NS_VIEW_FLAG_CLIP_PLACEHOLDERS_TO_BOUNDS : NS_VIEW_FLAG_CLIP_CHILDREN_TO_BOUNDS)) != 0; }
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/**
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* Called to indicate that the visibility of a view has been
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* changed.
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* @param visibility new visibility state
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*/
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NS_IMETHOD SetVisibility(nsViewVisibility visibility);
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/**
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* Called to indicate that the z-index of a view has been changed.
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* The z-index is relative to all siblings of the view.
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* @param aAuto Indicate that the z-index of a view is "auto". An "auto" z-index
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* means that the view does not define a new stacking context,
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* which means that the z-indicies of the view's children are
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* relative to the view's siblings.
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* @param zindex new z depth
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*/
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void SetZIndex(PRBool aAuto, PRInt32 aZIndex, PRBool aTopMost);
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/**
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* Set/Get whether the view "floats" above all other views,
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* which tells the compositor not to consider higher views in
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* the view hierarchy that would geometrically intersect with
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* this view. This is a hack, but it fixes some problems with
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* views that need to be drawn in front of all other views.
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* @result PR_TRUE if the view floats, PR_FALSE otherwise.
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*/
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NS_IMETHOD SetFloating(PRBool aFloatingView);
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/**
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* Note: This didn't exist in 4.0. Called to set the opacity of a view.
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* A value of 0.0 means completely transparent. A value of 1.0 means
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* completely opaque.
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* @param opacity new opacity value
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*/
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NS_IMETHOD SetOpacity(float opacity);
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/**
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* Used set the transparency status of the content in a view. see
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* HasTransparency().
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* @param aTransparent PR_TRUE if there are transparent areas, PR_FALSE otherwise.
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*/
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NS_IMETHOD SetContentTransparency(PRBool aTransparent);
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/**
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* Set the widget associated with this view.
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* @param aWidget widget to associate with view. It is an error
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* to associate a widget with more than one view. To disassociate
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* a widget from a view, use nsnull. If there are no more references
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* to the widget that may have been associated with the view, it will
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* be destroyed.
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* @return error status
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*/
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NS_IMETHOD SetWidget(nsIWidget *aWidget);
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/**
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* @return the view's dimensions after clipping by ancestors is applied
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* (the rect is relative to the view's origin)
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* @param aStopAtView do not consider clipping imposed by views above this view
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* on the ancestor chain
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*/
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nsRect GetClippedRect(nsIView* aStopAtView = nsnull);
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// Helper function to get the view that's associated with a widget
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static nsView* GetViewFor(nsIWidget* aWidget) {
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return NS_STATIC_CAST(nsView*, nsIView::GetViewFor(aWidget));
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}
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// Helper function to get mouse grabbing off this view (by moving it to the
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// parent, if we can)
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void DropMouseGrabbing();
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public:
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// NOT in nsIView, so only available in view module
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nsZPlaceholderView* GetZParent() const { return mZParent; }
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// These are also present in nsIView, but these versions return nsView and nsViewManager
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// instead of nsIView and nsIViewManager.
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nsView* GetFirstChild() const { return mFirstChild; }
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nsView* GetNextSibling() const { return mNextSibling; }
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nsView* GetParent() const { return mParent; }
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nsViewManager* GetViewManager() const { return mViewManager; }
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// These are superceded by a better interface in nsIView
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PRInt32 GetZIndex() const { return mZIndex; }
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PRBool GetZIndexIsAuto() const { return (mVFlags & NS_VIEW_FLAG_AUTO_ZINDEX) != 0; }
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// This is a better interface than GetDimensions(nsRect&) above
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nsRect GetDimensions() const { nsRect r = mDimBounds; r.MoveBy(-mPosX, -mPosY); return r; }
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// These are defined exactly the same in nsIView, but for now they have to be redeclared
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// here because of stupid C++ method hiding rules
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PRBool HasNonEmptyDirtyRegion() {
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return mDirtyRegion && !mDirtyRegion->IsEmpty();
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}
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nsRegion* GetDirtyRegion() {
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if (!mDirtyRegion) {
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mDirtyRegion = new nsRegion();
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NS_ASSERTION(mDirtyRegion, "Out of memory!");
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}
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return mDirtyRegion;
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}
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void InsertChild(nsView *aChild, nsView *aSibling);
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void RemoveChild(nsView *aChild);
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void SetParent(nsView *aParent) { mParent = aParent; }
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void SetZParent(nsZPlaceholderView *aZParent) { mZParent = aZParent; }
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void SetNextSibling(nsView *aSibling) { mNextSibling = aSibling; }
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PRUint32 GetViewFlags() const { return mVFlags; }
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void SetViewFlags(PRUint32 aFlags) { mVFlags = aFlags; }
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void SetTopMost(PRBool aTopMost) { aTopMost ? mVFlags |= NS_VIEW_FLAG_TOPMOST : mVFlags &= ~NS_VIEW_FLAG_TOPMOST; }
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PRBool IsTopMost() { return((mVFlags & NS_VIEW_FLAG_TOPMOST) != 0); }
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// Don't use this method when you want to adjust an nsPoint.
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// Just write "pt += view->GetPosition();"
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// When everything's converted to nsPoint, this can go away.
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void ConvertToParentCoords(nscoord* aX, nscoord* aY) const { *aX += mPosX; *aY += mPosY; }
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// Don't use this method when you want to adjust an nsPoint.
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// Just write "pt -= view->GetPosition();"
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// When everything's converted to nsPoint, this can go away.
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void ConvertFromParentCoords(nscoord* aX, nscoord* aY) const { *aX -= mPosX; *aY -= mPosY; }
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void ResetWidgetBounds(PRBool aRecurse, PRBool aMoveOnly, PRBool aInvalidateChangedSize);
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void SetPositionIgnoringChildWidgets(nscoord aX, nscoord aY);
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nsresult LoadWidget(const nsCID &aClassIID);
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// Update the cached RootViewManager for all view manager descendents,
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// If the hierarchy is being removed, aViewManagerParent points to the view
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// manager for the hierarchy's old parent, and will have its mouse grab
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// released if it points to any view in this view hierarchy.
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void InvalidateHierarchy(nsViewManager *aViewManagerParent);
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virtual ~nsView();
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protected:
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// Do the actual work of ResetWidgetBounds, unconditionally. Don't
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// call this method if we have no widget.
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void DoResetWidgetBounds(PRBool aMoveOnly, PRBool aInvalidateChangedSize);
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nsZPlaceholderView* mZParent;
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// mClipRect is relative to the view's origin.
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nsRect* mClipRect;
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nsRegion* mDirtyRegion;
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PRPackedBool mChildRemoved;
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};
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#endif
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