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pjs/layout/generic/nsFrame.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "nsCOMPtr.h"
#include "nsFrame.h"
#include "nsFrameList.h"
#include "nsLineLayout.h"
#include "nsIContent.h"
#include "nsIAtom.h"
#include "nsString.h"
#include "nsIStyleContext.h"
#include "nsIView.h"
#include "nsIViewManager.h"
#include "nsIPresContext.h"
#include "nsCRT.h"
#include "nsGUIEvent.h"
#include "nsDOMEvent.h"
#include "nsStyleConsts.h"
#include "nsIPresShell.h"
#include "prlog.h"
#include "prprf.h"
#include <stdarg.h>
#include "nsIPtr.h"
#include "nsISizeOfHandler.h"
#include "nsIDOMText.h"
#include "nsDocument.h"
#include "nsIDeviceContext.h"
#include "nsHTMLIIDs.h"
#include "nsIEventStateManager.h"
#include "nsIDOMSelection.h"
#include "nsIFrameSelection.h"
#include "nsHTMLParts.h"
#include "nsLayoutAtoms.h"
#include "nsFrameTraversal.h"
#include "nsCOMPtr.h"
#include "nsStyleChangeList.h"
#define NORMAL_DRAG_HANDLING 1 // remove this to simulate a start-drag event.
#if !NORMAL_DRAG_HANDLING
#include "nsWidgetsCID.h"
#include "nsIDragService.h"
#include "nsIDragSession.h"
#include "nsITransferable.h"
#include "nsISupportsArray.h"
#include "nsIServiceManager.h"
// Define Class IDs -- i hate having to do this
static NS_DEFINE_IID(kCDragServiceCID, NS_DRAGSERVICE_CID);
static NS_DEFINE_IID(kCTransferableCID, NS_TRANSFERABLE_CID);
#endif
// Some Misc #defines
#define SELECTION_DEBUG 0
#define FORCE_SELECTION_UPDATE 1
#define CALC_DEBUG 0
#include "nsICaret.h"
#include "nsILineIterator.h"
// [HACK] Foward Declarations
void ForceDrawFrame(nsFrame * aFrame);
//non Hack prototypes
static void GetLastLeaf(nsIFrame **aFrame);
#if 0
static void GetFirstLeaf(nsIFrame **aFrame);
static void RefreshContentFrames(nsIPresContext& aPresContext, nsIContent * aStartContent, nsIContent * aEndContent);
#endif
//----------------------------------------------------------------------
static PRBool gShowFrameBorders = PR_FALSE;
NS_LAYOUT void nsIFrame::ShowFrameBorders(PRBool aEnable)
{
gShowFrameBorders = aEnable;
}
NS_LAYOUT PRBool nsIFrame::GetShowFrameBorders()
{
return gShowFrameBorders;
}
/**
* Note: the log module is created during library initialization which
* means that you cannot perform logging before then.
*/
static PRLogModuleInfo* gLogModule;
#ifdef NS_DEBUG
static PRLogModuleInfo* gFrameVerifyTreeLogModuleInfo;
#endif
static PRBool gFrameVerifyTreeEnable = PRBool(0x55);
NS_LAYOUT PRBool
nsIFrame::GetVerifyTreeEnable()
{
#ifdef NS_DEBUG
if (gFrameVerifyTreeEnable == PRBool(0x55)) {
if (nsnull == gFrameVerifyTreeLogModuleInfo) {
gFrameVerifyTreeLogModuleInfo = PR_NewLogModule("frameverifytree");
gFrameVerifyTreeEnable = 0 != gFrameVerifyTreeLogModuleInfo->level;
printf("Note: frameverifytree is %sabled\n",
gFrameVerifyTreeEnable ? "en" : "dis");
}
}
#endif
return gFrameVerifyTreeEnable;
}
NS_LAYOUT void
nsIFrame::SetVerifyTreeEnable(PRBool aEnabled)
{
gFrameVerifyTreeEnable = aEnabled;
}
NS_LAYOUT PRLogModuleInfo*
nsIFrame::GetLogModuleInfo()
{
if (nsnull == gLogModule) {
gLogModule = PR_NewLogModule("frame");
}
return gLogModule;
}
//----------------------------------------------------------------------
static NS_DEFINE_IID(kIFrameIID, NS_IFRAME_IID);
static NS_DEFINE_IID(kIFrameSelection, NS_IFRAMESELECTION_IID);
nsresult
NS_NewEmptyFrame(nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsFrame* it = new nsFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aNewFrame = it;
return NS_OK;
}
NS_IMPL_ZEROING_OPERATOR_NEW(nsFrame)
nsFrame::nsFrame()
{
mState = NS_FRAME_FIRST_REFLOW | NS_FRAME_SYNC_FRAME_AND_VIEW | NS_FRAME_IS_DIRTY;
}
nsFrame::~nsFrame()
{
NS_IF_RELEASE(mContent);
NS_IF_RELEASE(mStyleContext);
if (nsnull != mView) {
// Break association between view and frame
mView->Destroy();
mView = nsnull;
}
}
/////////////////////////////////////////////////////////////////////////////
// nsISupports
nsresult nsFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
static NS_DEFINE_IID(kClassIID, kIFrameIID);
if (aIID.Equals(kIHTMLReflowIID)) {
*aInstancePtr = (void*)(nsIHTMLReflow*)this;
return NS_OK;
} else if (aIID.Equals(kClassIID) || aIID.Equals(kISupportsIID)) {
*aInstancePtr = (void*)this;
return NS_OK;
}
return NS_NOINTERFACE;
}
nsrefcnt nsFrame::AddRef(void)
{
NS_WARNING("not supported for frames");
return 1;
}
nsrefcnt nsFrame::Release(void)
{
NS_WARNING("not supported for frames");
return 1;
}
/////////////////////////////////////////////////////////////////////////////
// nsIFrame
NS_IMETHODIMP
nsFrame::Init(nsIPresContext& aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow)
{
mContent = aContent;
NS_IF_ADDREF(mContent);
mParent = aParent;
return SetStyleContext(&aPresContext, aContext);
}
NS_IMETHODIMP nsFrame::SetInitialChildList(nsIPresContext& aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList)
{
// XXX This shouldn't be getting called at all, but currently is for backwards
// compatility reasons...
#if 0
NS_ERROR("not a container");
return NS_ERROR_UNEXPECTED;
#else
NS_ASSERTION(nsnull == aChildList, "not a container");
return NS_OK;
#endif
}
NS_IMETHODIMP
nsFrame::AppendFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aFrameList)
{
NS_PRECONDITION(PR_FALSE, "not a container");
return NS_ERROR_UNEXPECTED;
}
NS_IMETHODIMP
nsFrame::InsertFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList)
{
NS_PRECONDITION(PR_FALSE, "not a container");
return NS_ERROR_UNEXPECTED;
}
NS_IMETHODIMP
nsFrame::RemoveFrame(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame)
{
NS_PRECONDITION(PR_FALSE, "not a container");
return NS_ERROR_UNEXPECTED;
}
NS_IMETHODIMP
nsFrame::ReplaceFrame(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame,
nsIFrame* aNewFrame)
{
NS_PRECONDITION(PR_FALSE, "not a container");
return NS_ERROR_UNEXPECTED;
}
NS_IMETHODIMP
nsFrame::Destroy(nsIPresContext& aPresContext)
{
nsCOMPtr<nsIPresShell> shell;
aPresContext.GetShell(getter_AddRefs(shell));
// XXX Rather than always doing this it would be better if it was part of
// a frame observer mechanism and the pres shell could register as an
// observer of the frame while the reflow command is pending...
if (shell) {
shell->NotifyDestroyingFrame(this);
}
if ((mState & NS_FRAME_EXTERNAL_REFERENCE) ||
(mState & NS_FRAME_SELECTED_CONTENT)) {
if (shell) {
shell->ClearFrameRefs(this);
}
}
//XXX Why is this done in nsFrame instead of some frame class
// that actually loads images?
aPresContext.StopAllLoadImagesFor(this);
//Set to prevent event dispatch during destruct
if (nsnull != mView) {
mView->SetClientData(nsnull);
}
delete this;
return NS_OK;
}
NS_IMETHODIMP
nsFrame::GetContent(nsIContent** aContent) const
{
NS_PRECONDITION(nsnull != aContent, "null OUT parameter pointer");
NS_IF_ADDREF(mContent);
*aContent = mContent;
return NS_OK;
}
NS_IMETHODIMP
nsFrame::GetOffsets(PRInt32 &aStart, PRInt32 &aEnd) const
{
aStart = 0;
aEnd = 0;
return NS_OK;
}
NS_IMETHODIMP
nsFrame::GetStyleContext(nsIStyleContext** aStyleContext) const
{
NS_PRECONDITION(nsnull != aStyleContext, "null OUT parameter pointer");
NS_ASSERTION(nsnull != mStyleContext, "frame should always have style context");
NS_IF_ADDREF(mStyleContext);
*aStyleContext = mStyleContext;
return NS_OK;
}
NS_IMETHODIMP nsFrame::SetStyleContext(nsIPresContext* aPresContext,nsIStyleContext* aContext)
{
// NS_PRECONDITION(0 == (mState & NS_FRAME_IN_REFLOW), "Shouldn't set style context during reflow");
NS_PRECONDITION(nsnull != aContext, "null ptr");
if (aContext != mStyleContext) {
NS_IF_RELEASE(mStyleContext);
if (nsnull != aContext) {
mStyleContext = aContext;
NS_ADDREF(aContext);
DidSetStyleContext(aPresContext);
}
}
return NS_OK;
}
// Subclass hook for style post processing
NS_IMETHODIMP nsFrame::DidSetStyleContext(nsIPresContext* aPresContext)
{
return NS_OK;
}
NS_IMETHODIMP nsFrame::GetStyleData(nsStyleStructID aSID, const nsStyleStruct*& aStyleStruct) const
{
NS_ASSERTION(mStyleContext!=nsnull,"null style context");
if (mStyleContext) {
aStyleStruct = mStyleContext->GetStyleData(aSID);
} else {
aStyleStruct = nsnull;
}
return NS_OK;
}
NS_IMETHODIMP
nsFrame::GetAdditionalStyleContext(PRInt32 aIndex,
nsIStyleContext** aStyleContext) const
{
NS_PRECONDITION(aIndex >= 0, "invalid index number");
NS_ASSERTION(aStyleContext, "null ptr");
if (! aStyleContext) {
return NS_ERROR_NULL_POINTER;
}
*aStyleContext = nsnull;
return ((aIndex < 0) ? NS_ERROR_INVALID_ARG : NS_OK);
}
NS_IMETHODIMP
nsFrame::SetAdditionalStyleContext(PRInt32 aIndex,
nsIStyleContext* aStyleContext)
{
NS_PRECONDITION(aIndex >= 0, "invalid index number");
return ((aIndex < 0) ? NS_ERROR_INVALID_ARG : NS_OK);
}
void nsFrame::CaptureStyleChangeFor(nsIFrame* aFrame,
nsIStyleContext* aOldContext,
nsIStyleContext* aNewContext,
PRInt32 aParentChange,
nsStyleChangeList* aChangeList,
PRInt32* aLocalChange)
{
if (aChangeList && aLocalChange) { // does caller really want change data?
PRInt32 change = NS_STYLE_HINT_NONE;
if (aOldContext) {
aNewContext->CalcStyleDifference(aOldContext, change);
}
else {
nsIStyleContext* parent = aNewContext->GetParent();
if (parent) {
aNewContext->CalcStyleDifference(parent, change);
NS_RELEASE(parent);
}
}
if (aParentChange < change) { // found larger change, record it
aChangeList->AppendChange(aFrame, change);
*aLocalChange = change;
}
else {
*aLocalChange = aParentChange;
}
}
}
NS_IMETHODIMP nsFrame::ReResolveStyleContext(nsIPresContext* aPresContext,
nsIStyleContext* aParentContext,
PRInt32 aParentChange,
nsStyleChangeList* aChangeList,
PRInt32* aLocalChange)
{
// XXX TURN THIS ON NS_PRECONDITION(0 == (mState & NS_FRAME_IN_REFLOW), "Shouldn't set style context during reflow");
NS_ASSERTION(nsnull != mStyleContext, "null style context");
nsresult result = NS_COMFALSE;
if (nsnull != mStyleContext) {
nsIAtom* pseudoTag = nsnull;
mStyleContext->GetPseudoType(pseudoTag);
nsIStyleContext* newContext;
if (nsnull != pseudoTag) {
result = aPresContext->ResolvePseudoStyleContextFor(mContent, pseudoTag,
aParentContext,
PR_FALSE, &newContext);
}
else {
result = aPresContext->ResolveStyleContextFor(mContent, aParentContext,
PR_FALSE, &newContext);
}
NS_ASSERTION(nsnull != newContext, "failed to get new style context");
if (nsnull != newContext) {
if (newContext != mStyleContext) {
nsIStyleContext* oldContext = mStyleContext;
mStyleContext = newContext;
result = DidSetStyleContext(aPresContext);
CaptureStyleChangeFor(this, oldContext, newContext,
aParentChange, aChangeList, aLocalChange);
NS_RELEASE(oldContext);
}
else {
NS_RELEASE(newContext);
result = NS_COMFALSE;
}
}
}
return result;
}
// Geometric parent member functions
NS_IMETHODIMP nsFrame::GetParent(nsIFrame** aParent) const
{
NS_PRECONDITION(nsnull != aParent, "null OUT parameter pointer");
*aParent = mParent;
return NS_OK;
}
NS_IMETHODIMP nsFrame::SetParent(const nsIFrame* aParent)
{
mParent = (nsIFrame*)aParent;
return NS_OK;
}
// Bounding rect member functions
NS_IMETHODIMP nsFrame::GetRect(nsRect& aRect) const
{
aRect = mRect;
return NS_OK;
}
NS_IMETHODIMP nsFrame::GetOrigin(nsPoint& aPoint) const
{
aPoint.x = mRect.x;
aPoint.y = mRect.y;
return NS_OK;
}
NS_IMETHODIMP nsFrame::GetSize(nsSize& aSize) const
{
aSize.width = mRect.width;
aSize.height = mRect.height;
return NS_OK;
}
NS_IMETHODIMP nsFrame::SetRect(const nsRect& aRect)
{
MoveTo(aRect.x, aRect.y);
SizeTo(aRect.width, aRect.height);
return NS_OK;
}
NS_IMETHODIMP nsFrame::MoveTo(nscoord aX, nscoord aY)
{
mRect.x = aX;
mRect.y = aY;
if (nsnull != mView) {
// If we should keep the view position and size in sync with the frame
// then position the view. Don't do this if we're in the middle of reflow.
// Instead wait until the DidReflow() notification
if (NS_FRAME_SYNC_FRAME_AND_VIEW == (mState & (NS_FRAME_IN_REFLOW |
NS_FRAME_SYNC_FRAME_AND_VIEW))) {
// Position view relative to its parent, not relative to our
// parent frame (our parent frame may not have a view).
nsIView* parentWithView;
nsPoint origin;
GetOffsetFromView(origin, &parentWithView);
nsIViewManager *vm;
mView->GetViewManager(vm);
vm->MoveViewTo(mView, origin.x, origin.y);
NS_RELEASE(vm);
}
}
return NS_OK;
}
NS_IMETHODIMP nsFrame::SizeTo(nscoord aWidth, nscoord aHeight)
{
mRect.width = aWidth;
mRect.height = aHeight;
// Let the view know
if (nsnull != mView) {
// If we should keep the view position and size in sync with the frame
// then resize the view. Don't do this if we're in the middle of reflow.
// Instead wait until the DidReflow() notification
if (NS_FRAME_SYNC_FRAME_AND_VIEW == (mState & (NS_FRAME_IN_REFLOW |
NS_FRAME_SYNC_FRAME_AND_VIEW))) {
// Resize the view to be the same size as the frame
nsIViewManager *vm;
mView->GetViewManager(vm);
vm->ResizeView(mView, aWidth, aHeight);
NS_RELEASE(vm);
}
}
return NS_OK;
}
// Child frame enumeration
NS_IMETHODIMP
nsFrame::GetAdditionalChildListName(PRInt32 aIndex, nsIAtom** aListName) const
{
NS_PRECONDITION(nsnull != aListName, "null OUT parameter pointer");
NS_PRECONDITION(aIndex >= 0, "invalid index number");
*aListName = nsnull;
return aIndex < 0 ? NS_ERROR_INVALID_ARG : NS_OK;
}
NS_IMETHODIMP nsFrame::FirstChild(nsIAtom* aListName, nsIFrame** aFirstChild) const
{
*aFirstChild = nsnull;
return nsnull == aListName ? NS_OK : NS_ERROR_INVALID_ARG;
}
PRBool
nsFrame::DisplaySelection(nsIPresContext& aPresContext, PRBool isOkToTurnOn)
{
PRBool result = PR_FALSE;
nsCOMPtr<nsIPresShell> shell;
nsresult rv = aPresContext.GetShell(getter_AddRefs(shell));
if (NS_SUCCEEDED(rv) && shell) {
nsCOMPtr<nsIDocument> doc;
rv = shell->GetDocument(getter_AddRefs(doc));
if (NS_SUCCEEDED(rv) && doc) {
result = doc->GetDisplaySelection();
if (isOkToTurnOn && !result) {
doc->SetDisplaySelection(PR_TRUE);
result = PR_TRUE;
}
}
}
return result;
}
void
nsFrame::SetClipRect(nsIRenderingContext& aRenderingContext)
{
PRBool clipState;
const nsStyleDisplay* display;
GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) display);
// Start with the auto version of the clip rect. Then overlay on top
// of it specific offsets.
nscoord top = 0;
nscoord right = mRect.width;
nscoord bottom = mRect.height;
nscoord left = 0;
if (0 == (NS_STYLE_CLIP_TOP_AUTO & display->mClipFlags)) {
top += display->mClip.top;
}
if (0 == (NS_STYLE_CLIP_RIGHT_AUTO & display->mClipFlags)) {
right -= display->mClip.right;
}
if (0 == (NS_STYLE_CLIP_BOTTOM_AUTO & display->mClipFlags)) {
bottom -= display->mClip.bottom;
}
if (0 == (NS_STYLE_CLIP_LEFT_AUTO & display->mClipFlags)) {
left += display->mClip.left;
}
// Set updated clip-rect into the rendering context
nsRect clipRect(left, top, right - left, bottom - top);
aRenderingContext.SetClipRect(clipRect, nsClipCombine_kIntersect, clipState);
}
NS_IMETHODIMP
nsFrame::Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer)
{
//if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer) {
/** GetDocument
*/
nsCOMPtr<nsIDocument> doc;
nsresult result;
nsCOMPtr<nsIPresShell> shell;
result = aPresContext.GetShell(getter_AddRefs(shell));
if (NS_FAILED(result))
return result;
PRBool displaySelection;
//result = shell->GetDisplayNonTextSelection(&displaySelection);
//if (NS_FAILED(result))
//return result;
displaySelection = PR_TRUE;
if (!displaySelection)
return NS_OK;
if (mContent) {
result = mContent->GetDocument(*getter_AddRefs(doc));
}
if (!doc || NS_FAILED(result)) {
if (NS_SUCCEEDED(result) && shell) {
result = shell->GetDocument(getter_AddRefs(doc));
}
}
displaySelection = doc->GetDisplaySelection();
nsFrameState frameState;
PRBool isSelected;
GetFrameState(&frameState);
isSelected = (frameState & NS_FRAME_SELECTED_CONTENT) == NS_FRAME_SELECTED_CONTENT;
// PRInt32 selectionStartOffset = 0;//frame coordinates
// PRInt32 selectionEndOffset = 0;//frame coordinates
if (!displaySelection || !isSelected)
return NS_OK;
nsCOMPtr<nsIDOMSelection> selection;
nsCOMPtr<nsIFrameSelection> frameSelection;
nsCOMPtr<nsIContent> newContent;
result = mContent->GetParent(*getter_AddRefs(newContent));
SelectionDetails *details;
PRInt32 offset;
if (NS_SUCCEEDED(result) && newContent){
result = newContent->IndexOf(mContent, offset);
if (NS_FAILED(result))
{
return result;
}
}
if (NS_SUCCEEDED(result) && shell){
result = shell->GetFrameSelection(getter_AddRefs(frameSelection));
if (NS_SUCCEEDED(result) && frameSelection){
result = frameSelection->LookUpSelection(newContent, offset,
1, &details);// last param notused
}
}
//}
if (details)
{
nsRect rect;
GetRect(rect);
rect.width-=2;
rect.height-=2;
rect.x++;
rect.y++;
aRenderingContext.SetColor(NS_RGB(0,0,255));
nsRect drawrect(1, 1, rect.width, rect.height);
aRenderingContext.DrawRect(drawrect );
SelectionDetails *deletingDetails = details;
while((deletingDetails = details->mNext) != nsnull) {
delete details;
details = deletingDetails;
}
delete details;
//aRenderingContext.DrawLine(rect.x, rect.y, rect.XMost(), rect.YMost());
//aRenderingContext.DrawLine(rect.x, rect.YMost(), rect.XMost(), rect.y);
}
return NS_OK;
}
/**
*
*/
NS_IMETHODIMP
nsFrame::HandleEvent(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus)
{
if (nsEventStatus_eConsumeNoDefault == aEventStatus) {
return NS_OK;
}
/*i have no idea why this is here keeping incase..
if (DisplaySelection(aPresContext) == PR_FALSE) {
if (aEvent->message != NS_MOUSE_LEFT_BUTTON_DOWN) {
return NS_OK;
}
}
*/
if (aEvent->message == NS_MOUSE_MOVE) {
nsCOMPtr<nsIPresShell> shell;
nsresult rv = aPresContext.GetShell(getter_AddRefs(shell));
if (NS_SUCCEEDED(rv)){
nsCOMPtr<nsIFrameSelection> frameselection;
if (NS_SUCCEEDED(shell->GetFrameSelection(getter_AddRefs(frameselection))) && frameselection){
PRBool mouseDown = PR_FALSE;
if (NS_SUCCEEDED(frameselection->GetMouseDownState(&mouseDown)) && mouseDown) {
#if NORMAL_DRAG_HANDLING
HandleDrag(aPresContext, aEvent, aEventStatus);
#else
nsIDragService* dragService;
nsresult rv = nsServiceManager::GetService(kCDragServiceCID,
nsIDragService::GetIID(),
(nsISupports **)&dragService);
if (NS_OK == rv) {
nsCOMPtr<nsITransferable> trans;
rv = nsComponentManager::CreateInstance(kCTransferableCID, nsnull,
nsITransferable::GetIID(), getter_AddRefs(trans));
nsCOMPtr<nsITransferable> trans2;
rv = nsComponentManager::CreateInstance(kCTransferableCID, nsnull,
nsITransferable::GetIID(), getter_AddRefs(trans2));
if ( trans && trans2 ) {
nsString textPlainFlavor ( "text/plain" );
trans->AddDataFlavor(&textPlainFlavor);
nsString dragText = "Drag Text";
PRUint32 len = 9;
trans->SetTransferData(&textPlainFlavor, dragText.ToNewCString(), len); // transferable consumes the data
trans2->AddDataFlavor(&textPlainFlavor);
nsString dragText2 = "More Drag Text";
len = 14;
trans2->SetTransferData(&textPlainFlavor, dragText2.ToNewCString(), len); // transferable consumes the data
nsCOMPtr<nsISupportsArray> items;
NS_NewISupportsArray(getter_AddRefs(items));
if ( items ) {
items->AppendElement(trans);
items->AppendElement(trans2);
dragService->InvokeDragSession(items, nsnull, nsIDragService::DRAGDROP_ACTION_COPY | nsIDragService::DRAGDROP_ACTION_MOVE);
}
}
nsServiceManager::ReleaseService(kCDragServiceCID, dragService);
}
//---------------------------------------------------
#endif
}
}
}
}
else if (aEvent->message == NS_MOUSE_LEFT_BUTTON_DOWN) {
HandlePress(aPresContext, aEvent, aEventStatus);
}
else if (aEvent->message == NS_MOUSE_LEFT_DOUBLECLICK) {
HandleMultiplePress(aPresContext, aEvent, aEventStatus);
}
return NS_OK;
}
/**
* Handles the Mouse Press Event for the frame
*/
NS_IMETHODIMP
nsFrame::HandlePress(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus)
{
if (!DisplaySelection(aPresContext)) {
return NS_OK;
}
nsMouseEvent *me = (nsMouseEvent *)aEvent;
if (me->clickCount >2 )
return nsFrame::HandleMultiplePress(aPresContext,aEvent,aEventStatus);
nsCOMPtr<nsIPresShell> shell;
nsresult rv = aPresContext.GetShell(getter_AddRefs(shell));
if (NS_SUCCEEDED(rv) && shell) {
nsInputEvent *inputEvent = (nsInputEvent *)aEvent;
PRInt32 startPos = 0;
// PRUint32 contentOffset = 0;
PRInt32 contentOffsetEnd = 0;
nsCOMPtr<nsIContent> newContent;
if (NS_SUCCEEDED(GetPosition(aPresContext, aEvent->point.x, getter_AddRefs(newContent),
startPos, contentOffsetEnd))){
nsCOMPtr<nsIFrameSelection> frameselection;
if (NS_SUCCEEDED(shell->GetFrameSelection(getter_AddRefs(frameselection))) && frameselection){
frameselection->SetMouseDownState(PR_TRUE);//not important if it fails here
frameselection->HandleClick(newContent, startPos , contentOffsetEnd , inputEvent->isShift, inputEvent->isControl);
}
//no release
}
}
return NS_OK;
}
/**
* Handles the Multiple Mouse Press Event for the frame
*/
NS_IMETHODIMP
nsFrame::HandleMultiplePress(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus)
{
if (!DisplaySelection(aPresContext)) {
return NS_OK;
}
nsMouseEvent *me = (nsMouseEvent *)aEvent;
if (me->clickCount <3 )
return NS_OK;
nsCOMPtr<nsIPresShell> shell;
nsresult rv = aPresContext.GetShell(getter_AddRefs(shell));
if (NS_SUCCEEDED(rv) && shell) {
nsCOMPtr<nsIRenderingContext> acx;
nsCOMPtr<nsIFocusTracker> tracker;
tracker = do_QueryInterface(shell, &rv);
if (NS_FAILED(rv) || !tracker)
return rv;
rv = shell->CreateRenderingContext(this, getter_AddRefs(acx));
if (NS_SUCCEEDED(rv)){
PRInt32 startPos = 0;
PRInt32 contentOffsetEnd = 0;
nsCOMPtr<nsIContent> newContent;
if (NS_SUCCEEDED(GetPosition(aPresContext, aEvent->point.x,
getter_AddRefs(newContent), startPos, contentOffsetEnd))){
//find which word needs to be selected! use peek offset one way then the other
nsCOMPtr<nsIContent> startContent;
nsCOMPtr<nsIDOMNode> startNode;
nsCOMPtr<nsIContent> endContent;
nsCOMPtr<nsIDOMNode> endNode;
//peeks{}
nsPeekOffsetStruct startpos;
startpos.SetData(tracker,
0,
eSelectBeginLine,
eDirPrevious,
startPos,
PR_FALSE,
PR_TRUE);
rv = PeekOffset(&startpos);
if (NS_FAILED(rv))
return rv;
nsPeekOffsetStruct endpos;
endpos.SetData(tracker,
0,
eSelectEndLine,
eDirNext,
startPos,
PR_FALSE,
PR_FALSE);
rv = PeekOffset(&endpos);
if (NS_FAILED(rv))
return rv;
endNode = do_QueryInterface(endpos.mResultContent,&rv);
if (NS_FAILED(rv))
return rv;
startNode = do_QueryInterface(startpos.mResultContent,&rv);
if (NS_FAILED(rv))
return rv;
nsCOMPtr<nsIDOMSelection> selection;
if (NS_SUCCEEDED(shell->GetSelection(SELECTION_NORMAL, getter_AddRefs(selection)))){
rv = selection->Collapse(startNode,startpos.mContentOffset);
if (NS_FAILED(rv))
return rv;
rv = selection->Extend(endNode,endpos.mContentOffset);
if (NS_FAILED(rv))
return rv;
}
//no release
}
}
}
return NS_OK;
}
NS_IMETHODIMP nsFrame::HandleDrag(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus)
{
if (!DisplaySelection(aPresContext)) {
return NS_OK;
}
// printf("handledrag %x\n",this);
nsCOMPtr<nsIPresShell> shell;
nsresult rv = aPresContext.GetShell(getter_AddRefs(shell));
if (NS_SUCCEEDED(rv) && shell) {
PRInt32 startPos = 0;
PRInt32 contentOffsetEnd = 0;
nsCOMPtr<nsIContent> newContent;
if (NS_SUCCEEDED(GetPosition(aPresContext, aEvent->point.x, getter_AddRefs(newContent),
startPos, contentOffsetEnd))){
nsCOMPtr<nsIFrameSelection> frameselection;
if (NS_SUCCEEDED(shell->GetFrameSelection(getter_AddRefs(frameselection))) && frameselection){
frameselection->HandleClick(newContent, startPos, contentOffsetEnd , PR_TRUE, PR_FALSE); //TRUE IS THE DIFFERENCE for continue selection
}
//no release
}
}
return NS_OK;
}
NS_IMETHODIMP nsFrame::HandleRelease(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus)
{
return NS_OK;
}
//--------------------------------------------------------------------------
//-- GetPosition
//--------------------------------------------------------------------------
NS_IMETHODIMP nsFrame::GetPosition(nsIPresContext& aCX,
nscoord aXCoord,
nsIContent ** aNewContent,
PRInt32& aContentOffset,
PRInt32& aContentOffsetEnd)
{
//default getposition will return parent as newcontent
//also aActualContentOffset will be 0
// aOffset and aOffsetEnd will be 1 value apart
// aNewFrame is not used nor is aEvent, aRendContent, nor aPresContext
if (!aNewContent || !mContent)
return NS_ERROR_NULL_POINTER;
nsresult result;
//traverse through children and look for the best one to give this to
//if it fails the getposition call, make it yourself// also only look at primary list
nsIFrame *kid;
nsIFrame *closestFrame = nsnull;
nsresult rv = FirstChild(nsnull, &kid);
if (NS_SUCCEEDED(rv) && nsnull != kid) {
PRInt32 closestDistance = 999999; //some HUGE number that will always fail first comparison
while (nsnull != kid) {
nsRect rect;
kid->GetRect(rect);
nsPoint offsetPoint; //used for offset of result frame
nsIView * view; //used for call of get offset from view
kid->GetOffsetFromView(offsetPoint, &view);
rect.x = offsetPoint.x;
rect.y = offsetPoint.y;
if (rect.x <= aXCoord && (rect.x+rect.width) >= aXCoord)
{
closestFrame = kid;
break;
}
PRInt32 distance = PR_MIN(abs(rect.x - aXCoord),abs((rect.x + rect.width) - aXCoord));
if (distance < closestDistance)
{
closestDistance = distance;
closestFrame = kid;
}
else if (distance > closestDistance)
break;//done
kid->GetNextSibling(&kid);
}
if (closestFrame)
return closestFrame->GetPosition(aCX,aXCoord,aNewContent,aContentOffset,aContentOffsetEnd);
}
result = mContent->GetParent(*aNewContent);
if (*aNewContent){
result = (*aNewContent)->IndexOf(mContent, aContentOffset);
if (NS_FAILED(result))
{
return result;
}
aContentOffsetEnd = aContentOffset +1;
}
return result;
}
NS_IMETHODIMP
nsFrame::GetCursor(nsIPresContext& aPresContext,
nsPoint& aPoint,
PRInt32& aCursor)
{
const nsStyleColor* styleColor;
GetStyleData(eStyleStruct_Color, (const nsStyleStruct*&)styleColor);
aCursor = styleColor->mCursor;
if ((NS_STYLE_CURSOR_AUTO == aCursor) && (nsnull != mParent)) {
mParent->GetCursor(aPresContext, aPoint, aCursor);
}
return NS_OK;
}
NS_IMETHODIMP
nsFrame::GetFrameForPoint(const nsPoint& aPoint, nsIFrame** aFrame)
{
*aFrame = this;
return NS_OK;
}
// Resize and incremental reflow
NS_IMETHODIMP
nsFrame::GetFrameState(nsFrameState* aResult)
{
NS_PRECONDITION(nsnull != aResult, "null OUT parameter pointer");
*aResult = mState;
return NS_OK;
}
NS_IMETHODIMP
nsFrame::SetFrameState(nsFrameState aNewState)
{
mState = aNewState;
return NS_OK;
}
// nsIHTMLReflow member functions
NS_IMETHODIMP
nsFrame::WillReflow(nsIPresContext& aPresContext)
{
NS_FRAME_TRACE_MSG(NS_FRAME_TRACE_CALLS,
("WillReflow: oldState=%x", mState));
mState |= NS_FRAME_IN_REFLOW;
return NS_OK;
}
NS_IMETHODIMP
nsFrame::DidReflow(nsIPresContext& aPresContext,
nsDidReflowStatus aStatus)
{
NS_FRAME_TRACE_MSG(NS_FRAME_TRACE_CALLS,
("nsFrame::DidReflow: aStatus=%d", aStatus));
if (NS_FRAME_REFLOW_FINISHED == aStatus) {
mState &= ~(NS_FRAME_IN_REFLOW | NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY);
// Size and position the view if requested
if ((nsnull != mView) && (NS_FRAME_SYNC_FRAME_AND_VIEW & mState)) {
// Position and size view relative to its parent, not relative to our
// parent frame (our parent frame may not have a view).
nsIView* parentWithView;
nsPoint origin;
GetOffsetFromView(origin, &parentWithView);
nsIViewManager *vm;
mView->GetViewManager(vm);
vm->ResizeView(mView, mRect.width, mRect.height);
vm->MoveViewTo(mView, origin.x, origin.y);
// Clip applies to block-level and replaced elements with overflow
// set to other than 'visible'
const nsStyleDisplay* display =
(const nsStyleDisplay*)mStyleContext->GetStyleData(eStyleStruct_Display);
if (display->IsBlockLevel()) {
if (display->mOverflow == NS_STYLE_OVERFLOW_HIDDEN) {
nscoord left, top, right, bottom;
// Start with the 'auto' values and then factor in user
// specified values
left = top = 0;
right = mRect.width;
bottom = mRect.height;
if (0 == (NS_STYLE_CLIP_TOP_AUTO & display->mClipFlags)) {
top += display->mClip.top;
}
if (0 == (NS_STYLE_CLIP_RIGHT_AUTO & display->mClipFlags)) {
right -= display->mClip.right;
}
if (0 == (NS_STYLE_CLIP_BOTTOM_AUTO & display->mClipFlags)) {
bottom -= display->mClip.bottom;
}
if (0 == (NS_STYLE_CLIP_LEFT_AUTO & display->mClipFlags)) {
left += display->mClip.left;
}
mView->SetClip(left, top, right, bottom);
} else {
// Make sure no clip is set
mView->SetClip(0, 0, 0, 0);
}
}
NS_RELEASE(vm);
}
}
return NS_OK;
}
NS_IMETHODIMP
nsFrame::Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
aDesiredSize.width = 0;
aDesiredSize.height = 0;
aDesiredSize.ascent = 0;
aDesiredSize.descent = 0;
if (nsnull != aDesiredSize.maxElementSize) {
aDesiredSize.maxElementSize->width = 0;
aDesiredSize.maxElementSize->height = 0;
}
aStatus = NS_FRAME_COMPLETE;
return NS_OK;
}
NS_IMETHODIMP
nsFrame::FindTextRuns(nsLineLayout& aLineLayout)
{
aLineLayout.EndTextRun();
return NS_OK;
}
NS_IMETHODIMP
nsFrame::AdjustFrameSize(nscoord aExtraSpace, nscoord& aUsedSpace)
{
aUsedSpace = 0;
return NS_OK;
}
NS_IMETHODIMP
nsFrame::TrimTrailingWhiteSpace(nsIPresContext* aPresContext,
nsIRenderingContext& aRC,
nscoord& aDeltaWidth)
{
aDeltaWidth = 0;
return NS_OK;
}
NS_IMETHODIMP
nsFrame::ContentChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
nsISupports* aSubContent)
{
nsCOMPtr<nsIPresShell> shell;
nsresult rv = aPresContext->GetShell(getter_AddRefs(shell));
if (NS_SUCCEEDED(rv) && shell) {
nsIReflowCommand* reflowCmd;
rv = NS_NewHTMLReflowCommand(&reflowCmd, this,
nsIReflowCommand::ContentChanged);
if (NS_SUCCEEDED(rv)) {
shell->AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
}
return rv;
}
NS_IMETHODIMP
nsFrame::AttributeChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
nsIAtom* aAttribute,
PRInt32 aHint)
{
return NS_OK;
}
NS_IMETHODIMP
nsFrame::ContentStateChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
PRInt32 aHint)
{
return NS_OK;
}
// Flow member functions
NS_IMETHODIMP nsFrame::IsSplittable(nsSplittableType& aIsSplittable) const
{
aIsSplittable = NS_FRAME_NOT_SPLITTABLE;
return NS_OK;
}
NS_IMETHODIMP nsFrame::GetPrevInFlow(nsIFrame** aPrevInFlow) const
{
*aPrevInFlow = nsnull;
return NS_OK;
}
NS_IMETHODIMP nsFrame::SetPrevInFlow(nsIFrame*)
{
NS_ERROR("not splittable");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP nsFrame::GetNextInFlow(nsIFrame** aNextInFlow) const
{
*aNextInFlow = nsnull;
return NS_OK;
}
NS_IMETHODIMP nsFrame::SetNextInFlow(nsIFrame*)
{
NS_ERROR("not splittable");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP nsFrame::AppendToFlow(nsIFrame* aAfterFrame)
{
NS_ERROR("not splittable");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP nsFrame::PrependToFlow(nsIFrame* aBeforeFrame)
{
NS_ERROR("not splittable");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP nsFrame::RemoveFromFlow()
{
NS_ERROR("not splittable");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP nsFrame::BreakFromPrevFlow()
{
NS_ERROR("not splittable");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP nsFrame::BreakFromNextFlow()
{
NS_ERROR("not splittable");
return NS_ERROR_NOT_IMPLEMENTED;
}
// Associated view object
NS_IMETHODIMP nsFrame::GetView(nsIView** aView) const
{
NS_PRECONDITION(nsnull != aView, "null OUT parameter pointer");
*aView = mView;
return NS_OK;
}
NS_IMETHODIMP nsFrame::SetView(nsIView* aView)
{
nsresult rv;
if (nsnull != aView) {
mView = aView;
aView->SetClientData(this);
rv = NS_OK;
}
else
rv = NS_OK;
return rv;
}
// Find the first geometric parent that has a view
NS_IMETHODIMP nsFrame::GetParentWithView(nsIFrame** aParent) const
{
NS_PRECONDITION(nsnull != aParent, "null OUT parameter pointer");
nsIFrame* parent;
for (parent = mParent; nsnull != parent; parent->GetParent(&parent)) {
nsIView* parView;
parent->GetView(&parView);
if (nsnull != parView) {
break;
}
}
*aParent = parent;
return NS_OK;
}
// Returns the offset from this frame to the closest geometric parent that
// has a view. Also returns the containing view or null in case of error
NS_IMETHODIMP nsFrame::GetOffsetFromView(nsPoint& aOffset, nsIView** aView) const
{
NS_PRECONDITION(nsnull != aView, "null OUT parameter pointer");
nsIFrame* frame = (nsIFrame*)this;
*aView = nsnull;
aOffset.MoveTo(0, 0);
do {
nsPoint origin;
frame->GetOrigin(origin);
aOffset += origin;
frame->GetParent(&frame);
if (nsnull != frame) {
frame->GetView(aView);
}
} while ((nsnull != frame) && (nsnull == *aView));
return NS_OK;
}
NS_IMETHODIMP nsFrame::GetWindow(nsIWidget** aWindow) const
{
NS_PRECONDITION(nsnull != aWindow, "null OUT parameter pointer");
nsIFrame* frame;
nsIWidget* window = nsnull;
for (frame = (nsIFrame*)this; nsnull != frame; frame->GetParentWithView(&frame)) {
nsIView* view;
frame->GetView(&view);
if (nsnull != view) {
view->GetWidget(window);
if (nsnull != window) {
break;
}
}
}
NS_POSTCONDITION(nsnull != window, "no window in frame tree");
*aWindow = window;
return NS_OK;
}
NS_IMETHODIMP
nsFrame::GetFrameType(nsIAtom** aType) const
{
NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
*aType = nsnull;
return NS_OK;
}
void
nsFrame::Invalidate(const nsRect& aDamageRect,
PRBool aImmediate) const
{
nsIViewManager* viewManager = nsnull;
nsRect damageRect(aDamageRect);
// Checks to see if the damaged rect should be infalted
// to include the outline
const nsStyleSpacing* spacing;
GetStyleData(eStyleStruct_Spacing, (const nsStyleStruct*&)spacing);
nscoord width;
spacing->GetOutlineWidth(width);
if (width > 0) {
damageRect.Inflate(width, width);
}
PRUint32 flags = aImmediate ? NS_VMREFRESH_IMMEDIATE : NS_VMREFRESH_NO_SYNC;
if (nsnull != mView) {
mView->GetViewManager(viewManager);
viewManager->UpdateView(mView, damageRect, flags);
} else {
nsRect rect(damageRect);
nsPoint offset;
nsIView* view;
GetOffsetFromView(offset, &view);
NS_ASSERTION(nsnull != view, "no view");
rect += offset;
view->GetViewManager(viewManager);
viewManager->UpdateView(view, rect, flags);
}
NS_IF_RELEASE(viewManager);
}
#define MAX_REFLOW_DEPTH 500
PRBool
nsFrame::IsFrameTreeTooDeep(const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aMetrics)
{
if (aReflowState.mReflowDepth > MAX_REFLOW_DEPTH) {
mState |= NS_FRAME_IS_UNFLOWABLE;
mState &= ~NS_FRAME_OUTSIDE_CHILDREN;
aMetrics.width = 0;
aMetrics.height = 0;
aMetrics.ascent = 0;
aMetrics.descent = 0;
aMetrics.mCarriedOutBottomMargin = 0;
aMetrics.mCombinedArea.x = 0;
aMetrics.mCombinedArea.y = 0;
aMetrics.mCombinedArea.width = 0;
aMetrics.mCombinedArea.height = 0;
if (aMetrics.maxElementSize) {
aMetrics.maxElementSize->width = 0;
aMetrics.maxElementSize->height = 0;
}
return PR_TRUE;
}
mState &= ~NS_FRAME_IS_UNFLOWABLE;
return PR_FALSE;
}
// Style sizing methods
NS_IMETHODIMP nsFrame::IsPercentageBase(PRBool& aBase) const
{
const nsStylePosition* position;
GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)position);
if (position->mPosition != NS_STYLE_POSITION_NORMAL) {
aBase = PR_TRUE;
}
else {
const nsStyleDisplay* display;
GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&)display);
if ((display->mDisplay == NS_STYLE_DISPLAY_BLOCK) ||
(display->mDisplay == NS_STYLE_DISPLAY_LIST_ITEM) ||
(display->mDisplay == NS_STYLE_DISPLAY_TABLE_CELL)) {
aBase = PR_TRUE;
}
else {
aBase = PR_FALSE;
}
}
return NS_OK;
}
// Sibling pointer used to link together frames
NS_IMETHODIMP nsFrame::GetNextSibling(nsIFrame** aNextSibling) const
{
NS_PRECONDITION(nsnull != aNextSibling, "null OUT parameter pointer");
*aNextSibling = mNextSibling;
return NS_OK;
}
NS_IMETHODIMP nsFrame::SetNextSibling(nsIFrame* aNextSibling)
{
NS_ASSERTION(aNextSibling != this, "attempt to create circular frame list");
mNextSibling = aNextSibling;
return NS_OK;
}
NS_IMETHODIMP nsFrame::Scrolled(nsIView *aView)
{
return NS_OK;
}
PRInt32 nsFrame::ContentIndexInContainer(const nsIFrame* aFrame)
{
nsIContent* content;
PRInt32 result = -1;
aFrame->GetContent(&content);
if (nsnull != content) {
nsIContent* parentContent;
content->GetParent(parentContent);
if (nsnull != parentContent) {
parentContent->IndexOf(content, result);
NS_RELEASE(parentContent);
}
NS_RELEASE(content);
}
return result;
}
// Debugging
NS_IMETHODIMP
nsFrame::List(FILE* out, PRInt32 aIndent) const
{
IndentBy(out, aIndent);
ListTag(out);
if (nsnull != mView) {
fprintf(out, " [view=%p]", mView);
}
fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
if (0 != mState) {
fprintf(out, " [state=%08x]", mState);
}
fputs("\n", out);
return NS_OK;
}
NS_IMETHODIMP
nsFrame::GetFrameName(nsString& aResult) const
{
return MakeFrameName("Frame", aResult);
}
nsresult
nsFrame::MakeFrameName(const char* aType, nsString& aResult) const
{
aResult = aType;
if (nsnull != mContent) {
nsIAtom* tag;
mContent->GetTag(tag);
if ((tag != nsnull) && (tag != nsLayoutAtoms::textTagName)) {
aResult.Append("(");
nsAutoString buf;
tag->ToString(buf);
aResult.Append(buf);
NS_RELEASE(tag);
aResult.Append(")");
}
}
char buf[40];
PR_snprintf(buf, sizeof(buf), "(%d)", ContentIndexInContainer(this));
aResult.Append(buf);
return NS_OK;
}
void
nsFrame::XMLQuote(nsString& aString)
{
PRInt32 i, len = aString.Length();
for (i = 0; i < len; i++) {
PRUnichar ch = aString.CharAt(i);
if (ch == '<') {
nsAutoString tmp("&lt;");
aString.Cut(i, 1);
aString.Insert(tmp, i);
len += 3;
i += 3;
}
else if (ch == '>') {
nsAutoString tmp("&gt;");
aString.Cut(i, 1);
aString.Insert(tmp, i);
len += 3;
i += 3;
}
else if (ch == '\"') {
nsAutoString tmp("&quot;");
aString.Cut(i, 1);
aString.Insert(tmp, i);
len += 5;
i += 5;
}
}
}
PRBool
nsFrame::ParentDisablesSelection() const
{
PRBool selected;
if (NS_FAILED(GetSelected(&selected)))
return PR_FALSE;
if (selected)
return PR_FALSE; //if this frame is selected and no one has overridden the selection from "higher up"
//then no one below us will be disabled by this frame.
nsIFrame* target;
GetParent(&target);
if (target)
return ((nsFrame *)target)->ParentDisablesSelection();
return PR_FALSE; //default this does not happen
}
NS_IMETHODIMP
nsFrame::DumpRegressionData(FILE* out, PRInt32 aIndent)
{
IndentBy(out, aIndent);
fprintf(out, "<frame va=\"%ld\" type=\"", PRUptrdiff(this));
nsAutoString name;
GetFrameName(name);
XMLQuote(name);
fputs(name, out);
fprintf(out, "\" state=\"%d\" parent=\"%ld\">\n",
mState, PRUptrdiff(mParent));
aIndent++;
DumpBaseRegressionData(out, aIndent);
aIndent--;
IndentBy(out, aIndent);
fprintf(out, "</frame>\n");
return NS_OK;
}
void
nsFrame::DumpBaseRegressionData(FILE* out, PRInt32 aIndent)
{
if (nsnull != mNextSibling) {
IndentBy(out, aIndent);
fprintf(out, "<next-sibling va=\"%ld\"/>\n", PRUptrdiff(mNextSibling));
}
if (nsnull != mView) {
IndentBy(out, aIndent);
fprintf(out, "<view va=\"%ld\">\n", PRUptrdiff(mView));
aIndent++;
// XXX add in code to dump out view state too...
aIndent--;
IndentBy(out, aIndent);
fprintf(out, "</view>\n");
}
IndentBy(out, aIndent);
fprintf(out, "<bbox x=\"%d\" y=\"%d\" w=\"%d\" h=\"%d\"/>\n",
mRect.x, mRect.y, mRect.width, mRect.height);
// Now dump all of the children on all of the child lists
nsIFrame* kid;
nsIAtom* list = nsnull;
PRInt32 listIndex = 0;
do {
nsresult rv = FirstChild(list, &kid);
if (NS_SUCCEEDED(rv) && (nsnull != kid)) {
IndentBy(out, aIndent);
if (nsnull != list) {
nsAutoString listName;
list->ToString(listName);
fprintf(out, "<child-list name=\"");
XMLQuote(listName);
fputs(listName, out);
fprintf(out, "\">\n");
}
else {
fprintf(out, "<child-list>\n");
}
aIndent++;
while (nsnull != kid) {
kid->DumpRegressionData(out, aIndent);
kid->GetNextSibling(&kid);
}
aIndent--;
IndentBy(out, aIndent);
fprintf(out, "</child-list>\n");
}
NS_IF_RELEASE(list);
GetAdditionalChildListName(listIndex++, &list);
} while (nsnull != list);
}
NS_IMETHODIMP
nsFrame::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const
{
if (!aResult) {
return NS_ERROR_NULL_POINTER;
}
#ifdef DEBUG
*aResult = sizeof(*this);
#else
*aResult = 0;
#endif
return NS_OK;
}
NS_IMETHODIMP
nsFrame::VerifyTree() const
{
NS_ASSERTION(0 == (mState & NS_FRAME_IN_REFLOW), "frame is in reflow");
return NS_OK;
}
/*this method may.. invalidate if the state was changed or if aForceRedraw is PR_TRUE
it will not update immediately.*/
NS_IMETHODIMP
nsFrame::SetSelected(nsIDOMRange *aRange,PRBool aSelected, nsSpread aSpread)
{
if (aSelected && ParentDisablesSelection())
return NS_OK;
if (eSpreadDown == aSpread){
nsIFrame* kid;
nsresult rv = FirstChild(nsnull, &kid);
if (NS_SUCCEEDED(rv)) {
while (nsnull != kid) {
kid->SetSelected(nsnull,aSelected,aSpread);
kid->GetNextSibling(&kid);
}
}
}
nsFrameState frameState;
GetFrameState(&frameState);
PRBool isSelected = ((frameState & NS_FRAME_SELECTED_CONTENT) == NS_FRAME_SELECTED_CONTENT);
if (aSelected == isSelected) //allready set thanks
{
return NS_OK;
}
if ( aSelected ){
frameState |= NS_FRAME_SELECTED_CONTENT;
}
else
frameState &= ~NS_FRAME_SELECTED_CONTENT;
SetFrameState(frameState);
nsRect frameRect;
GetRect(frameRect);
nsRect rect(0, 0, frameRect.width, frameRect.height);
Invalidate(rect, PR_FALSE);
return NS_OK;
}
NS_IMETHODIMP
nsFrame::GetSelected(PRBool *aSelected) const
{
if (!aSelected )
return NS_ERROR_NULL_POINTER;
*aSelected = (PRBool)(mState & NS_FRAME_SELECTED_CONTENT);
return NS_OK;
}
NS_IMETHODIMP
nsFrame::GetPointFromOffset(nsIPresContext* inPresContext, nsIRenderingContext* inRendContext, PRInt32 inOffset, nsPoint* outPoint)
{
NS_PRECONDITION(outPoint != nsnull, "Null parameter");
nsPoint bottomLeft(0, 0);
*outPoint = bottomLeft;
return NS_OK;
}
NS_IMETHODIMP
nsFrame::GetChildFrameContainingOffset(PRInt32 inContentOffset, PRBool inHint, PRInt32* outFrameContentOffset, nsIFrame **outChildFrame)
{
NS_PRECONDITION(outChildFrame && outFrameContentOffset, "Null parameter");
*outFrameContentOffset = (PRInt32)inHint;
*outChildFrame = this;
return NS_OK;
}
nsresult
nsFrame::GetNextPrevLineFromeBlockFrame(nsIFocusTracker *aTracker,
nsDirection aDirection,
nsIFrame *aBlockFrame,
PRInt32 aLineStart,
nscoord aDesiredX,
nsIContent **aResultContent,
PRInt32 *aContentOffset,
PRInt8 aOutSideLimit,
nsIFrame **aResultFrame
)
{
//magic numbers aLineStart will be -1 for end of block 0 will be start of block
if (!aBlockFrame)
return NS_ERROR_NULL_POINTER;
if (aResultFrame) {
*aResultFrame = nsnull;
}
if (aResultContent) {
*aResultContent = nsnull;
}
nsresult result;
nsCOMPtr<nsILineIterator> it;
result = aBlockFrame->QueryInterface(nsILineIterator::GetIID(),getter_AddRefs(it));
if (NS_FAILED(result) || !it)
return result;
PRInt32 searchingLine = aLineStart;
PRInt32 countLines;
result = it->GetNumLines(&countLines);
if (aOutSideLimit > 0) //start at end
searchingLine = countLines;
else if (aOutSideLimit <0)//start at begining
searchingLine = -1;//"next" will be 0
else
if ((aDirection == eDirPrevious && searchingLine == 0) ||
(aDirection == eDirNext && searchingLine >= (countLines -1) )){
//we need to jump to new block frame.
return NS_ERROR_FAILURE;
}
PRInt32 lineFrameCount;
nsIFrame *resultFrame = nsnull;
nsIFrame *farStoppingFrame = nsnull; //we keep searching until we find a "this" frame then we go to next line
nsIFrame *nearStoppingFrame = nsnull; //if we are backing up from edge, stop here
nsIFrame *firstFrame;
nsIFrame *lastFrame;
nsRect nonUsedRect;
PRBool isBeforeFirstFrame, isAfterLastFrame;
PRBool found = PR_FALSE;
while (!found)
{
if (aDirection == eDirPrevious)
searchingLine --;
else
searchingLine ++;
if ((aDirection == eDirPrevious && searchingLine < 0) ||
(aDirection == eDirNext && searchingLine >= countLines ))
{
//we need to jump to new block frame.
return NS_ERROR_FAILURE;
}
result = it->GetLine(searchingLine, &firstFrame, &lineFrameCount,nonUsedRect);
if (!lineFrameCount)
continue;
if (NS_SUCCEEDED(result)){
lastFrame = firstFrame;
for (;lineFrameCount > 1;lineFrameCount --){
result = lastFrame->GetNextSibling(&lastFrame);
if (NS_FAILED(result)){
NS_ASSERTION(0,"should not be reached nsFrame\n");
continue;
}
}
GetLastLeaf(&lastFrame);
if (aDirection == eDirNext){
nearStoppingFrame = firstFrame;
farStoppingFrame = lastFrame;
}
else{
nearStoppingFrame = lastFrame;
farStoppingFrame = firstFrame;
}
nsPoint offset;
nsIView * view; //used for call of get offset from view
aBlockFrame->GetOffsetFromView(offset,&view);
nscoord newDesiredX = aDesiredX - offset.x;//get desired x into blockframe coordinates!
result = it->FindFrameAt(searchingLine, newDesiredX, &resultFrame, &isBeforeFirstFrame, &isAfterLastFrame);
}
if (NS_SUCCEEDED(result) && resultFrame)
{
nsCOMPtr<nsILineIterator> newIt;
//check to see if this is ANOTHER blockframe inside the other one if so then call into its lines
result = resultFrame->QueryInterface(nsILineIterator::GetIID(),getter_AddRefs(newIt));
if (NS_SUCCEEDED(result) && newIt)
{
*aResultFrame = resultFrame;
return NS_OK;
}
//resultFrame is not a block frame
nsCOMPtr<nsIBidirectionalEnumerator> frameTraversal;
result = NS_NewFrameTraversal(getter_AddRefs(frameTraversal),LEAF,resultFrame);
if (NS_FAILED(result))
return result;
nsISupports *isupports = nsnull;
nsIFrame *storeOldResultFrame = resultFrame;
while ( !found ){
nsCOMPtr<nsIPresContext> context;
result = aTracker->GetPresContext(getter_AddRefs(context));
result = resultFrame->GetPosition(*(context.get()),aDesiredX,
aResultContent,*aContentOffset, *aContentOffset);
if (NS_SUCCEEDED(result))
found = PR_TRUE;
else {
if (aDirection == eDirPrevious && (resultFrame == farStoppingFrame))
break;
if (aDirection == eDirNext && (resultFrame == nearStoppingFrame))
break;
//always try previous on THAT line if that fails go the other way
result = frameTraversal->Prev();
if (NS_FAILED(result))
break;
result = frameTraversal->CurrentItem(&isupports);
if (NS_FAILED(result) || !isupports)
return result;
//we must CAST here to an nsIFrame. nsIFrame doesnt really follow the rules
resultFrame = (nsIFrame *)isupports;
}
}
if (!found){
resultFrame = storeOldResultFrame;
result = NS_NewFrameTraversal(getter_AddRefs(frameTraversal),LEAF,resultFrame);
}
while ( !found ){
nsCOMPtr<nsIPresContext> context;
result = aTracker->GetPresContext(getter_AddRefs(context));
result = resultFrame->GetPosition(*(context.get()),aDesiredX,
aResultContent,*aContentOffset, *aContentOffset);
if (NS_SUCCEEDED(result))
found = PR_TRUE;
else {
if (aDirection == eDirPrevious && (resultFrame == nearStoppingFrame))
break;
if (aDirection == eDirNext && (resultFrame == farStoppingFrame))
break;
//previous didnt work now we try "next"
result = frameTraversal->Next();
if (NS_FAILED(result))
break;
result = frameTraversal->CurrentItem(&isupports);
if (NS_FAILED(result) || !isupports)
return result;
//we must CAST here to an nsIFrame. nsIFrame doesnt really follow the rules
resultFrame = (nsIFrame *)isupports;
}
}
*aResultFrame = resultFrame;
}
else {
//we need to jump to new block frame.
nsPeekOffsetStruct pos;
pos.SetData(aTracker, aDesiredX, eSelectLine, aDirection, 0, PR_FALSE,PR_TRUE);
if (aDirection == eDirPrevious)
pos.mStartOffset=-1;//start from end
return aBlockFrame->PeekOffset(&pos);
}
}
return NS_OK;
}
NS_IMETHODIMP
nsFrame::PeekOffset(nsPeekOffsetStruct *aPos)
{
if (!aPos || !aPos->mTracker )
return NS_ERROR_NULL_POINTER;
nsresult result = NS_ERROR_FAILURE;
switch (aPos->mAmount){
case eSelectLine :
{
nsCOMPtr<nsILineIterator> it;
nsIFrame *blockFrame = this;
nsIFrame *thisBlock = this;
PRInt32 thisLine;
while (NS_FAILED(result)){
thisBlock = blockFrame;
result = blockFrame->GetParent(&blockFrame);
if (NS_FAILED(result) || !blockFrame) //if at line 0 then nothing to do
return result;
result = blockFrame->QueryInterface(nsILineIterator::GetIID(),getter_AddRefs(it));
while (NS_FAILED(result) && blockFrame)
{
thisBlock = blockFrame;
result = blockFrame->GetParent(&blockFrame);
if (NS_SUCCEEDED(result) && blockFrame){
result = blockFrame->QueryInterface(nsILineIterator::GetIID(),getter_AddRefs(it));
}
}
//this block is now one child down from blockframe
if (NS_FAILED(result) || !it || !blockFrame || !thisBlock)
return result;
result = it->FindLineContaining(thisBlock, &thisLine);
if (NS_FAILED(result) || thisLine <0)
return result;
int edgeCase = 0;//no edge case. this should look at thisLine
PRBool doneLooping = PR_FALSE;//tells us when no more block frames hit.
//this part will find a frame or a block frame. if its a block frame
//it will "drill down" to find a viable frame or it will return an error.
do {
result = GetNextPrevLineFromeBlockFrame(aPos->mTracker,
aPos->mDirection,
blockFrame,
thisLine,
aPos->mDesiredX,
getter_AddRefs(aPos->mResultContent),
&(aPos->mContentOffset),
edgeCase, //start from thisLine
&(aPos->mResultFrame)
);
doneLooping = PR_TRUE; //do not continue with while loop
if (NS_SUCCEEDED(result) && aPos->mResultFrame){
result = aPos->mResultFrame->QueryInterface(nsILineIterator::GetIID(),getter_AddRefs(it));
if (NS_SUCCEEDED(result) && it)//we have struck another block element!
{
doneLooping = PR_FALSE;
if (aPos->mDirection == eDirPrevious)
edgeCase = 1;//far edge, search from end backwards
else
edgeCase = -1;//near edge search from beginning onwards
thisLine=0;//this line means nothing now.
//everything else means something so keep looking "inside" the block
blockFrame = aPos->mResultFrame;
}
else
result = NS_OK;//THIS is to mean that everything is ok to the containing while loop
}
}while(!doneLooping);
}
break;
}
case eSelectBeginLine:
case eSelectEndLine:
{
nsCOMPtr<nsILineIterator> it;
nsIFrame *blockFrame = this;
nsIFrame *thisBlock = this;
PRInt32 thisLine;
result = blockFrame->GetParent(&blockFrame);
if (NS_FAILED(result) || !blockFrame) //if at line 0 then nothing to do
return result;
result = blockFrame->QueryInterface(nsILineIterator::GetIID(),getter_AddRefs(it));
while (NS_FAILED(result) && blockFrame)
{
thisBlock = blockFrame;
result = blockFrame->GetParent(&blockFrame);
if (NS_SUCCEEDED(result) && blockFrame){
result = blockFrame->QueryInterface(nsILineIterator::GetIID(),getter_AddRefs(it));
}
}
//this block is now one child down from blockframe
if (NS_FAILED(result) || !it || !blockFrame || !thisBlock)
return result;
result = it->FindLineContaining(thisBlock, &thisLine);
if (NS_FAILED(result) || thisLine < 0 )
return result;
nsCOMPtr<nsIPresContext> context;
result = aPos->mTracker->GetPresContext(getter_AddRefs(context));
if (NS_FAILED(result) || !context)
return result;
PRInt32 lineFrameCount;
nsIFrame *firstFrame;
nsRect usedRect;
result = it->GetLine(thisLine, &firstFrame, &lineFrameCount,usedRect);
if (eSelectBeginLine == aPos->mAmount)
{
if (firstFrame)
{
result = firstFrame->GetPosition(*(context.get()),0,
getter_AddRefs(aPos->mResultContent),aPos->mContentOffset, aPos->mContentOffset);
}
}
else
{
if (firstFrame)
{
PRBool found = PR_FALSE;
while(!found)
{
nsIFrame *nextFrame = firstFrame;;
for (PRInt32 i=1;i<lineFrameCount;i++)//allready have 1st frame
nextFrame->GetNextSibling(&nextFrame);
nsPoint offsetPoint; //used for offset of result frame
nsIView * view; //used for call of get offset from view
nextFrame->GetOffsetFromView(offsetPoint, &view);
usedRect.x = offsetPoint.x;
usedRect.y = offsetPoint.y;
result = nextFrame->GetPosition(*(context.get()),2*usedRect.width,//2* just to be sure we are off the edge
getter_AddRefs(aPos->mResultContent),aPos->mContentOffset, aPos->mContentOffset);
if (NS_SUCCEEDED(result))
found = PR_TRUE;
else
{
lineFrameCount--;
if (lineFrameCount == 0)
break;//just fail out
}
}
}
}
}break;
default:
{
//this will use the nsFrameTraversal as the default peek method.
//this should change to use geometry and also look to ALL the child lists
nsCOMPtr<nsIBidirectionalEnumerator> frameTraversal;
result = NS_NewFrameTraversal(getter_AddRefs(frameTraversal),LEAF,this);
if (NS_FAILED(result))
return result;
nsISupports *isupports = nsnull;
if (aPos->mDirection == eDirNext)
result = frameTraversal->Next();
else
result = frameTraversal->Prev();
if (NS_FAILED(result))
return result;
result = frameTraversal->CurrentItem(&isupports);
if (NS_FAILED(result))
return result;
if (!isupports)
return NS_ERROR_NULL_POINTER;
//we must CAST here to an nsIFrame. nsIFrame doesnt really follow the rules
//for speed reasons
nsIFrame *newFrame = (nsIFrame *)isupports;
if (aPos->mDirection == eDirNext)
aPos->mStartOffset = 0;
else
aPos->mStartOffset = -1;
return newFrame->PeekOffset(aPos);
}
}
return result;
}
//-----------------------------------------------------------------------------------
/********************************************************
* Refreshes each content's frame
*********************************************************/
static void RefreshAllContentFrames(nsIFrame * aFrame, nsIContent * aContent)
{
nsIContent* frameContent;
aFrame->GetContent(&frameContent);
if (frameContent == aContent) {
ForceDrawFrame((nsFrame *)aFrame);
}
NS_IF_RELEASE(frameContent);
aFrame->FirstChild(nsnull, &aFrame);
while (aFrame) {
RefreshAllContentFrames(aFrame, aContent);
aFrame->GetNextSibling(&aFrame);
}
}
/********************************************************
* Refreshes each content's frame
*********************************************************/
/**
*
*/
void ForceDrawFrame(nsFrame * aFrame)//, PRBool)
{
if (aFrame == nsnull) {
return;
}
nsRect rect;
nsIView * view;
nsPoint pnt;
aFrame->GetOffsetFromView(pnt, &view);
aFrame->GetRect(rect);
rect.x = pnt.x;
rect.y = pnt.y;
if (view != nsnull) {
nsIViewManager * viewMgr;
view->GetViewManager(viewMgr);
if (viewMgr != nsnull) {
viewMgr->UpdateView(view, rect, 0);
NS_RELEASE(viewMgr);
}
//viewMgr->UpdateView(view, rect, NS_VMREFRESH_DOUBLE_BUFFER | NS_VMREFRESH_IMMEDIATE);
}
}
static void
GetLastLeaf(nsIFrame **aFrame)
{
if (!aFrame || !*aFrame)
return;
nsIFrame *child = *aFrame;
nsresult result;
nsIFrame *lookahead = nsnull;
while (1){
result = child->FirstChild(nsnull, &lookahead);
if (NS_FAILED(result) || !lookahead)
return;//nothing to do
child = lookahead;
while (NS_SUCCEEDED(child->GetNextSibling(&lookahead)) && lookahead)
child = lookahead;
*aFrame = child;
}
*aFrame = child;
}
#ifdef NS_DEBUG
static void
GetTagName(nsFrame* aFrame, nsIContent* aContent, PRIntn aResultSize,
char* aResult)
{
char namebuf[40];
namebuf[0] = 0;
if (nsnull != aContent) {
nsIAtom* tag;
aContent->GetTag(tag);
if (nsnull != tag) {
nsAutoString tmp;
tag->ToString(tmp);
tmp.ToCString(namebuf, sizeof(namebuf));
NS_RELEASE(tag);
}
}
PR_snprintf(aResult, aResultSize, "%s@%p", namebuf, aFrame);
}
void
nsFrame::Trace(const char* aMethod, PRBool aEnter)
{
if (NS_FRAME_LOG_TEST(gLogModule, NS_FRAME_TRACE_CALLS)) {
char tagbuf[40];
GetTagName(this, mContent, sizeof(tagbuf), tagbuf);
PR_LogPrint("%s: %s %s", tagbuf, aEnter ? "enter" : "exit", aMethod);
}
}
void
nsFrame::Trace(const char* aMethod, PRBool aEnter, nsReflowStatus aStatus)
{
if (NS_FRAME_LOG_TEST(gLogModule, NS_FRAME_TRACE_CALLS)) {
char tagbuf[40];
GetTagName(this, mContent, sizeof(tagbuf), tagbuf);
PR_LogPrint("%s: %s %s, status=%scomplete%s",
tagbuf, aEnter ? "enter" : "exit", aMethod,
NS_FRAME_IS_NOT_COMPLETE(aStatus) ? "not" : "",
(NS_FRAME_REFLOW_NEXTINFLOW & aStatus) ? "+reflow" : "");
}
}
void
nsFrame::TraceMsg(const char* aFormatString, ...)
{
if (NS_FRAME_LOG_TEST(gLogModule, NS_FRAME_TRACE_CALLS)) {
// Format arguments into a buffer
char argbuf[200];
va_list ap;
va_start(ap, aFormatString);
PR_vsnprintf(argbuf, sizeof(argbuf), aFormatString, ap);
va_end(ap);
char tagbuf[40];
GetTagName(this, mContent, sizeof(tagbuf), tagbuf);
PR_LogPrint("%s: %s", tagbuf, argbuf);
}
}
void
nsFrame::VerifyDirtyBitSet(nsIFrame* aFrameList)
{
for (nsIFrame*f = aFrameList; f; f->GetNextSibling(&f)) {
nsFrameState frameState;
f->GetFrameState(&frameState);
NS_ASSERTION(frameState & NS_FRAME_IS_DIRTY, "dirty bit not set");
}
}
#endif
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