474 lines
13 KiB
C++
474 lines
13 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the 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 Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* Pierre Phaneuf <pp@ludusdesign.com>
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*/
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#include "nsCOMPtr.h"
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#include "nsHTMLParts.h"
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#include "nsIPresContext.h"
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#include "nsIStyleContext.h"
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#include "nsIReflowCommand.h"
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#include "nsIDeviceContext.h"
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#include "nsPageFrame.h"
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#include "nsViewsCID.h"
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#include "nsIView.h"
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#include "nsIViewManager.h"
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#include "nsHTMLContainerFrame.h"
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#include "nsHTMLIIDs.h"
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#include "nsCSSRendering.h"
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#include "nsIScrollableView.h"
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#include "nsWidgetsCID.h"
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#include "nsScrollPortFrame.h"
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#include "nsLayoutAtoms.h"
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#include "nsIBox.h"
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#include "nsBoxLayoutState.h"
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#include "nsIBoxToBlockAdaptor.h"
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/*
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static NS_DEFINE_IID(kWidgetCID, NS_CHILD_CID);
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static NS_DEFINE_IID(kScrollingViewCID, NS_SCROLLING_VIEW_CID);
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static NS_DEFINE_IID(kViewCID, NS_VIEW_CID);
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static NS_DEFINE_IID(kIViewIID, NS_IVIEW_IID);
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static NS_DEFINE_IID(kScrollViewIID, NS_ISCROLLABLEVIEW_IID);
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static NS_DEFINE_IID(kAreaFrameIID, NS_IAREAFRAME_IID);
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*/
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static NS_DEFINE_IID(kWidgetCID, NS_CHILD_CID);
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static NS_DEFINE_IID(kScrollPortViewCID, NS_SCROLL_PORT_VIEW_CID);
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static NS_DEFINE_IID(kViewCID, NS_VIEW_CID);
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static NS_DEFINE_IID(kIViewIID, NS_IVIEW_IID);
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static NS_DEFINE_IID(kScrollViewIID, NS_ISCROLLABLEVIEW_IID);
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//----------------------------------------------------------------------
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nsresult
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NS_NewScrollPortFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
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{
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NS_PRECONDITION(aNewFrame, "null OUT ptr");
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if (nsnull == aNewFrame) {
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return NS_ERROR_NULL_POINTER;
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}
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nsScrollPortFrame* it = new (aPresShell) nsScrollPortFrame (aPresShell);
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if (nsnull == it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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*aNewFrame = it;
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return NS_OK;
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}
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nsScrollPortFrame::nsScrollPortFrame(nsIPresShell* aShell):nsBoxFrame(aShell)
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{
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}
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NS_IMETHODIMP
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nsScrollPortFrame::Init(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIFrame* aParent,
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nsIStyleContext* aStyleContext,
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nsIFrame* aPrevInFlow)
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{
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nsresult rv = nsBoxFrame::Init(aPresContext, aContent,
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aParent, aStyleContext,
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aPrevInFlow);
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// Create the scrolling view
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CreateScrollingView(aPresContext);
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return rv;
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}
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NS_IMETHODIMP
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nsScrollPortFrame::SetInitialChildList(nsIPresContext* aPresContext,
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nsIAtom* aListName,
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nsIFrame* aChildList)
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{
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nsresult rv = nsBoxFrame::SetInitialChildList(aPresContext, aListName,
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aChildList);
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nsIFrame* frame = mFrames.FirstChild();
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// There must be one and only one child frame
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if (!frame) {
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return NS_ERROR_INVALID_ARG;
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} else if (mFrames.GetLength() > 1) {
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return NS_ERROR_UNEXPECTED;
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}
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#ifdef NS_DEBUG
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// Verify that the scrolled frame has a view
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nsIView* scrolledView;
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frame->GetView(aPresContext, &scrolledView);
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NS_ASSERTION(nsnull != scrolledView, "no view");
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#endif
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// We need to allow the view's position to be different than the
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// frame's position
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nsFrameState state;
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frame->GetFrameState(&state);
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state &= ~NS_FRAME_SYNC_FRAME_AND_VIEW;
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frame->SetFrameState(state);
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return rv;
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}
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NS_IMETHODIMP
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nsScrollPortFrame::AppendFrames(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aFrameList)
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{
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// Only one child frame allowed
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return NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsScrollPortFrame::InsertFrames(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aPrevFrame,
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nsIFrame* aFrameList)
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{
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// Only one child frame allowed
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return NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsScrollPortFrame::RemoveFrame(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aOldFrame)
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{
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// Scroll frame doesn't support incremental changes
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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nsresult
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nsScrollPortFrame::CreateScrollingViewWidget(nsIView* aView, const nsStylePosition* aPosition)
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{
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nsresult rv = NS_OK;
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// If it's fixed positioned, then create a widget
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if (NS_STYLE_POSITION_FIXED == aPosition->mPosition) {
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rv = aView->CreateWidget(kWidgetCID);
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}
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return(rv);
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}
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nsresult
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nsScrollPortFrame::GetScrollingParentView(nsIPresContext* aPresContext,
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nsIFrame* aParent,
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nsIView** aParentView)
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{
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nsresult rv = aParent->GetView(aPresContext, aParentView);
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NS_ASSERTION(aParentView, "GetParentWithView failed");
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return(rv);
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}
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nsresult
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nsScrollPortFrame::CreateScrollingView(nsIPresContext* aPresContext)
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{
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nsIView* view;
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//Get parent frame
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nsIFrame* parent;
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GetParentWithView(aPresContext, &parent);
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NS_ASSERTION(parent, "GetParentWithView failed");
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// Get parent view
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nsIView* parentView = nsnull;
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GetScrollingParentView(aPresContext, parent, &parentView);
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// Get the view manager
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nsIViewManager* viewManager;
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parentView->GetViewManager(viewManager);
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// Create the scrolling view
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nsresult rv = nsComponentManager::CreateInstance(kScrollPortViewCID,
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nsnull,
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kIViewIID,
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(void **)&view);
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if (NS_OK == rv) {
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const nsStylePosition* position = (const nsStylePosition*)
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mStyleContext->GetStyleData(eStyleStruct_Position);
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const nsStyleColor* color = (const nsStyleColor*)
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mStyleContext->GetStyleData(eStyleStruct_Color);
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const nsStyleSpacing* spacing = (const nsStyleSpacing*)
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mStyleContext->GetStyleData(eStyleStruct_Spacing);
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const nsStyleDisplay* display = (const nsStyleDisplay*)
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mStyleContext->GetStyleData(eStyleStruct_Display);
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// Get the z-index
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PRInt32 zIndex = 0;
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if (eStyleUnit_Integer == position->mZIndex.GetUnit()) {
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zIndex = position->mZIndex.GetIntValue();
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}
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// Initialize the scrolling view
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view->Init(viewManager, mRect, parentView, display->IsVisibleOrCollapsed() ?
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nsViewVisibility_kShow : nsViewVisibility_kHide);
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// Insert the view into the view hierarchy
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viewManager->InsertChild(parentView, view, zIndex);
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// Set the view's opacity
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viewManager->SetViewOpacity(view, color->mOpacity);
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// Because we only paint the border and we don't paint a background,
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// inform the view manager that we have transparent content
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viewManager->SetViewContentTransparency(view, PR_TRUE);
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// If it's fixed positioned, then create a widget too
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CreateScrollingViewWidget(view, position);
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// Get the nsIScrollableView interface
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nsIScrollableView* scrollingView;
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view->QueryInterface(kScrollViewIID, (void**)&scrollingView);
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scrollingView->SetScrollPreference(nsScrollPreference_kNeverScroll);
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// Have the scrolling view create its internal widgets
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scrollingView->CreateScrollControls();
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// Set the scrolling view's insets to whatever our border is
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nsMargin border;
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if (!spacing->GetBorder(border)) {
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NS_NOTYETIMPLEMENTED("percentage border");
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border.SizeTo(0, 0, 0, 0);
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}
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scrollingView->SetControlInsets(border);
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// Remember our view
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SetView(aPresContext, view);
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}
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NS_RELEASE(viewManager);
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return rv;
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}
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NS_IMETHODIMP
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nsScrollPortFrame::GetMargin(nsMargin& aMargin)
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{
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aMargin.SizeTo(0,0,0,0);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsScrollPortFrame::GetPadding(nsMargin& aMargin)
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{
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aMargin.SizeTo(0,0,0,0);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsScrollPortFrame::GetBorder(nsMargin& aMargin)
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{
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aMargin.SizeTo(0,0,0,0);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsScrollPortFrame::Layout(nsBoxLayoutState& aState)
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{
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nsRect clientRect(0,0,0,0);
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GetClientRect(clientRect);
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nsIBox* kid = nsnull;
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GetChildBox(&kid);
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nsRect childRect(clientRect);
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nsMargin margin(0,0,0,0);
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kid->GetMargin(margin);
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childRect.Deflate(margin);
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nsSize min(0,0);
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kid->GetMinSize(aState, min);
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/*
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// if our child is not html then get is min size
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// and make sure we don't squeeze it smaller than that.
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nsIBoxToBlockAdaptor* adaptor = nsnull;
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if (NS_FAILED(kid->QueryInterface(NS_GET_IID(nsIBoxToBlockAdaptor), (void**)&adaptor))) {
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if (min.height > childRect.height)
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childRect.height = min.height;
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}
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*/
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if (min.height > childRect.height)
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childRect.height = min.height;
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if (min.width > childRect.width)
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childRect.width = min.width;
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kid->SetBounds(aState, childRect);
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kid->Layout(aState);
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kid->GetBounds(childRect);
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clientRect.Inflate(margin);
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if (childRect.width < clientRect.width || childRect.height < childRect.height)
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{
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if (childRect.width < clientRect.width)
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childRect.width = clientRect.width;
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if (childRect.height < clientRect.height)
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childRect.height = clientRect.height;
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clientRect.Deflate(margin);
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kid->SetBounds(aState, childRect);
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}
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SyncLayout(aState);
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nsIPresContext* presContext = aState.GetPresContext();
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nsIScrollableView* scrollingView;
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nsIView* view;
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GetView(presContext, &view);
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if (NS_SUCCEEDED(view->QueryInterface(kScrollViewIID, (void**)&scrollingView))) {
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scrollingView->ComputeScrollOffsets(PR_TRUE);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsScrollPortFrame::GetPrefSize(nsBoxLayoutState& aBoxLayoutState, nsSize& aSize)
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{
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nsIBox* child = nsnull;
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GetChildBox(&child);
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nsresult rv = child->GetPrefSize(aBoxLayoutState, aSize);
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AddMargin(child, aSize);
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AddBorderAndPadding(aSize);
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AddInset(aSize);
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nsIBox::AddCSSPrefSize(aBoxLayoutState, this, aSize);
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return rv;
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}
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NS_IMETHODIMP
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nsScrollPortFrame::GetMinSize(nsBoxLayoutState& aBoxLayoutState, nsSize& aSize)
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{
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aSize.width = 0;
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aSize.height = 0;
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AddBorderAndPadding(aSize);
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AddInset(aSize);
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nsIBox::AddCSSMinSize(aBoxLayoutState, this, aSize);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsScrollPortFrame::GetMaxSize(nsBoxLayoutState& aBoxLayoutState, nsSize& aSize)
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{
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nsIBox* child = nsnull;
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GetChildBox(&child);
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nsresult rv = child->GetMaxSize(aBoxLayoutState, aSize);
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AddMargin(child, aSize);
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AddBorderAndPadding(aSize);
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AddInset(aSize);
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nsIBox::AddCSSMaxSize(aBoxLayoutState, this, aSize);
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return rv;
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}
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NS_IMETHODIMP
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nsScrollPortFrame::Paint(nsIPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer)
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{
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if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
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// Only paint the border and background if we're visible
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const nsStyleDisplay* display = (const nsStyleDisplay*)
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mStyleContext->GetStyleData(eStyleStruct_Display);
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if (display->IsVisibleOrCollapsed()) {
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// Paint our border only (no background)
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const nsStyleSpacing* spacing = (const nsStyleSpacing*)
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mStyleContext->GetStyleData(eStyleStruct_Spacing);
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nsRect rect(0, 0, mRect.width, mRect.height);
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nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
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aDirtyRect, rect, *spacing, mStyleContext, 0);
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}
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}
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// Paint our children
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nsresult rv = nsBoxFrame::Paint(aPresContext, aRenderingContext, aDirtyRect,
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aWhichLayer);
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return rv;
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}
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PRIntn
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nsScrollPortFrame::GetSkipSides() const
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{
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return 0;
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}
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nsresult
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nsScrollPortFrame::GetContentOf(nsIContent** aContent)
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{
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return GetContent(aContent);
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}
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NS_IMETHODIMP
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nsScrollPortFrame::GetFrameType(nsIAtom** aType) const
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{
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NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
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*aType = nsLayoutAtoms::scrollFrame;
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NS_ADDREF(*aType);
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return NS_OK;
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}
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#ifdef NS_DEBUG
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NS_IMETHODIMP
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nsScrollPortFrame::GetFrameName(nsString& aResult) const
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{
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return MakeFrameName("ScrollPort", aResult);
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}
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#endif
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NS_IMETHODIMP_(nsrefcnt)
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nsScrollPortFrame::AddRef(void)
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{
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return NS_OK;
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}
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NS_IMETHODIMP_(nsrefcnt)
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nsScrollPortFrame::Release(void)
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{
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return NS_OK;
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}
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NS_INTERFACE_MAP_BEGIN(nsScrollPortFrame)
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NS_INTERFACE_MAP_ENTRY(nsIBox)
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#ifdef NS_DEBUG
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NS_INTERFACE_MAP_ENTRY(nsIFrameDebug)
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#endif
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIBox)
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NS_INTERFACE_MAP_END_INHERITING(nsBoxFrame)
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