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pjs/layout/generic/nsHTMLFrame.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 "nsHTMLParts.h"
#include "nsHTMLContainer.h"
#include "nsContainerFrame.h"
#include "nsIDocument.h"
#include "nsIReflowCommand.h"
#include "nsIPresContext.h"
#include "nsIStyleContext.h"
#include "nsViewsCID.h"
#include "nsIView.h"
#include "nsIViewManager.h"
#include "nsIContentDelegate.h"
#include "nsIWidget.h"
#include "nsHTMLIIDs.h"
#include "nsPageFrame.h"
#include "nsIRenderingContext.h"
#include "nsGUIEvent.h"
#include "nsDOMEvent.h"
#include "nsStyleConsts.h"
#include "nsIViewManager.h"
#include "nsHTMLAtoms.h"
#include "nsIEventStateManager.h"
#include "nsIDeviceContext.h"
class RootFrame : public nsContainerFrame {
public:
RootFrame(nsIContent* aContent);
NS_IMETHOD Init(nsIPresContext& aPresContext, nsIFrame* aChildList);
NS_IMETHOD Reflow(nsIPresContext& aPresContext,
nsReflowMetrics& aDesiredSize,
const nsReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD HandleEvent(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus);
};
// Pseudo frame created by the root frame
class RootContentFrame : public nsContainerFrame {
public:
RootContentFrame(nsIContent* aContent, nsIFrame* aParent);
NS_IMETHOD Reflow(nsIPresContext& aPresContext,
nsReflowMetrics& aDesiredSize,
const nsReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect);
NS_IMETHOD HandleEvent(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus);
protected:
void CreateFirstChild(nsIPresContext* aPresContext);
};
//----------------------------------------------------------------------
nsresult
NS_NewHTMLFrame(nsIContent* aContent, nsIFrame* aParentFrame,
nsIFrame*& aResult)
{
RootFrame* frame = new RootFrame(aContent);
if (nsnull == frame) {
return NS_ERROR_OUT_OF_MEMORY;
}
aResult = frame;
return NS_OK;
}
RootFrame::RootFrame(nsIContent* aContent)
: nsContainerFrame(aContent, nsnull)
{
}
NS_IMETHODIMP
RootFrame::Init(nsIPresContext& aPresContext, nsIFrame* aChildList)
{
// Construct the root content frame and set its style context
mFirstChild = new RootContentFrame(mContent, this);
mChildCount = 1;
nsIStyleContext* pseudoStyleContext =
aPresContext.ResolvePseudoStyleContextFor(nsHTMLAtoms::rootContentPseudo, this);
mFirstChild->SetStyleContext(&aPresContext, pseudoStyleContext);
NS_RELEASE(pseudoStyleContext);
// Set the geometric and content parent for each of the child frames
for (nsIFrame* frame = aChildList; nsnull != frame; frame->GetNextSibling(frame)) {
frame->SetGeometricParent(mFirstChild);
frame->SetContentParent(mFirstChild);
}
// Queue up the frames for the root content frame
return mFirstChild->Init(aPresContext, aChildList);
}
NS_IMETHODIMP
RootFrame::Reflow(nsIPresContext& aPresContext,
nsReflowMetrics& aDesiredSize,
const nsReflowState& aReflowState,
nsReflowStatus& aStatus)
{
NS_FRAME_TRACE_REFLOW_IN("RootFrame::Reflow");
#ifdef NS_DEBUG
PreReflowCheck();
#endif
aStatus = NS_FRAME_COMPLETE;
if (eReflowReason_Incremental == aReflowState.reason) {
// We don't expect the target of the reflow command to be the root frame
#ifdef NS_DEBUG
NS_ASSERTION(nsnull != aReflowState.reflowCommand, "no reflow command");
nsIFrame* target;
aReflowState.reflowCommand->GetTarget(target);
NS_ASSERTION(target != this, "root frame is reflow command target");
#endif
// Verify that the next frame in the reflow chain is our pseudo frame
nsIFrame* next;
aReflowState.reflowCommand->GetNext(next);
NS_ASSERTION(next == mFirstChild, "unexpected next reflow command frame");
// XXX CONSTRUCTION
#if 0
} else {
// Do we have any children?
if (nsnull == mFirstChild) {
// No. Create a pseudo frame
NS_ASSERTION(eReflowReason_Initial == aReflowState.reason, "unexpected reflow reason");
mFirstChild = new RootContentFrame(mContent, this);
mChildCount = 1;
nsIStyleContext* style = aPresContext.ResolvePseudoStyleContextFor(nsHTMLAtoms::rootContentPseudo, this);
mFirstChild->SetStyleContext(&aPresContext,style);
NS_RELEASE(style);
}
#endif
}
// Reflow our pseudo frame. It will choose whetever height its child frame
// wants
if (nsnull != mFirstChild) {
nsReflowMetrics desiredSize(nsnull);
nsReflowState kidReflowState(mFirstChild, aReflowState, aReflowState.maxSize);
mFirstChild->WillReflow(aPresContext);
aStatus = ReflowChild(mFirstChild, &aPresContext, desiredSize, kidReflowState);
// Place and size the child
nsRect rect(0, 0, desiredSize.width, desiredSize.height);
mFirstChild->SetRect(rect);
mFirstChild->DidReflow(aPresContext, NS_FRAME_REFLOW_FINISHED);
mLastContentOffset = ((RootContentFrame*)mFirstChild)->GetLastContentOffset();
}
// Return the max size as our desired size
aDesiredSize.width = aReflowState.maxSize.width;
aDesiredSize.height = aReflowState.maxSize.height;
aDesiredSize.ascent = aDesiredSize.height;
aDesiredSize.descent = 0;
#ifdef NS_DEBUG
PostReflowCheck(aStatus);
#endif
NS_FRAME_TRACE_REFLOW_OUT("RootFrame::Reflow", aStatus);
return NS_OK;
}
NS_IMETHODIMP
RootFrame::HandleEvent(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus)
{
mContent->HandleDOMEvent(aPresContext, (nsEvent*)aEvent, nsnull, DOM_EVENT_INIT, aEventStatus);
if (aEvent->message == NS_MOUSE_LEFT_BUTTON_UP ||
aEvent->message == NS_MOUSE_MIDDLE_BUTTON_UP ||
aEvent->message == NS_MOUSE_RIGHT_BUTTON_UP) {
nsFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
}
#if 0
if (aEventStatus != nsEventStatus_eConsumeNoDefault) {
switch (aEvent->message) {
case NS_MOUSE_MOVE:
case NS_MOUSE_ENTER:
{
nsIFrame* target = this;
PRInt32 cursor;
GetCursorAndContentAt(aPresContext, aEvent->point, &target, &mContent, cursor);
if (cursor == NS_STYLE_CURSOR_INHERIT) {
cursor = NS_STYLE_CURSOR_DEFAULT;
}
nsCursor c;
switch (cursor) {
default:
case NS_STYLE_CURSOR_DEFAULT:
c = eCursor_standard;
break;
case NS_STYLE_CURSOR_HAND:
c = eCursor_hyperlink;
break;
case NS_STYLE_CURSOR_IBEAM:
c = eCursor_select;
break;
}
nsIWidget* window;
target->GetWindow(window);
window->SetCursor(c);
NS_RELEASE(window);
}
break;
}
}
#endif
return NS_OK;
}
//----------------------------------------------------------------------
RootContentFrame::RootContentFrame(nsIContent* aContent, nsIFrame* aParent)
: nsContainerFrame(aContent, aParent)
{
// Create a view
nsIFrame* parent;
nsIView* view;
GetParentWithView(parent);
NS_ASSERTION(parent, "GetParentWithView failed");
nsIView* parView;
parent->GetView(parView);
NS_ASSERTION(parView, "no parent with view");
// Create a view
static NS_DEFINE_IID(kViewCID, NS_VIEW_CID);
static NS_DEFINE_IID(kIViewIID, NS_IVIEW_IID);
nsresult result = nsRepository::CreateInstance(kViewCID,
nsnull,
kIViewIID,
(void **)&view);
if (NS_OK == result) {
nsIView* rootView = parView;
nsIViewManager* viewManager;
rootView->GetViewManager(viewManager);
// Initialize the view
NS_ASSERTION(nsnull != viewManager, "null view manager");
view->Init(viewManager, mRect, rootView);
viewManager->InsertChild(rootView, view, 0);
NS_RELEASE(viewManager);
// Remember our view
SetView(view);
}
}
void
RootContentFrame::CreateFirstChild(nsIPresContext* aPresContext)
{
// Are we paginated?
if (aPresContext->IsPaginated()) {
// Yes. Create the first page frame
mFirstChild = new nsPageFrame(mContent, this);
mChildCount = 1;
mLastContentOffset = mFirstContentOffset;
} else {
// Create a frame for the body/frameset child
PRInt32 i, n;
mContent->ChildCount(n);
for (i = 0; i < n; i++) {
nsIContent* child;
mContent->ChildAt(i, child);
if (nsnull != child) {
nsIAtom* tag;
child->GetTag(tag);
if ((nsHTMLAtoms::body == tag) || (nsHTMLAtoms::frameset == tag)) {
// Create a frame
nsIContentDelegate* cd = child->GetDelegate(aPresContext);
if (nsnull != cd) {
nsIStyleContext* kidStyleContext =
aPresContext->ResolveStyleContextFor(child, this);
nsresult rv = cd->CreateFrame(aPresContext, child, this,
kidStyleContext, mFirstChild);
NS_RELEASE(kidStyleContext);
if (NS_OK == rv) {
mChildCount = 1;
mFirstContentOffset = i;
mLastContentOffset = i;
}
NS_RELEASE(cd);
}
}
NS_IF_RELEASE(tag);
NS_RELEASE(child);
}
}
}
}
// XXX Hack
#define PAGE_SPACING_TWIPS 100
NS_IMETHODIMP
RootContentFrame::Reflow(nsIPresContext& aPresContext,
nsReflowMetrics& aDesiredSize,
const nsReflowState& aReflowState,
nsReflowStatus& aStatus)
{
NS_FRAME_TRACE_REFLOW_IN("RootContentFrame::Reflow");
#ifdef NS_DEBUG
PreReflowCheck();
#endif
aStatus = NS_FRAME_COMPLETE;
// XXX Incremental reflow code doesn't handle page mode at all...
if (eReflowReason_Incremental == aReflowState.reason) {
// We don't expect the target of the reflow command to be the root
// content frame
#ifdef NS_DEBUG
nsIFrame* target;
aReflowState.reflowCommand->GetTarget(target);
NS_ASSERTION(target != this, "root content frame is reflow command target");
#endif
// Verify the next frame in the reflow chain is our child frame
nsIFrame* next;
aReflowState.reflowCommand->GetNext(next);
NS_ASSERTION(next == mFirstChild, "unexpected next reflow command frame");
nsSize maxSize(aReflowState.maxSize.width, NS_UNCONSTRAINEDSIZE);
nsReflowState kidReflowState(next, aReflowState, maxSize);
// Dispatch the reflow command to our child frame. Allow it to be as high
// as it wants
mFirstChild->WillReflow(aPresContext);
aStatus = ReflowChild(mFirstChild, &aPresContext, aDesiredSize, kidReflowState);
// Place and size the child. Make sure the child is at least as
// tall as our max size (the containing window)
if (aDesiredSize.height < aReflowState.maxSize.height) {
aDesiredSize.height = aReflowState.maxSize.height;
}
nsRect rect(0, 0, aDesiredSize.width, aDesiredSize.height);
mFirstChild->SetRect(rect);
} else {
nsReflowReason reflowReason = aReflowState.reason;
// XXX CONSTRUCTION
#if 0
// Do we have any children?
if (nsnull == mFirstChild) {
// No, create the first child frame
reflowReason = eReflowReason_Initial;
CreateFirstChild(&aPresContext);
}
#endif
// Resize our frames
if (nsnull != mFirstChild) {
if (aPresContext.IsPaginated()) {
nscoord y = PAGE_SPACING_TWIPS;
nsReflowMetrics kidSize(aDesiredSize.maxElementSize);
// Compute the size of each page and the x coordinate within
// ourselves that the pages will be placed at.
nsSize pageSize(aPresContext.GetPageWidth(),
aPresContext.GetPageHeight());
nsIDeviceContext *dx = aPresContext.GetDeviceContext();
float sbWidth, sbHeight;
dx->GetScrollBarDimensions(sbWidth, sbHeight);
PRInt32 extra = aReflowState.maxSize.width - PAGE_SPACING_TWIPS*2 -
pageSize.width - NSToCoordRound(sbWidth);
NS_RELEASE(dx);
// Note: nscoord is an unsigned type so don't combine these
// two statements or the extra will be promoted to unsigned
// and the >0 won't work!
nscoord x = PAGE_SPACING_TWIPS;
if (extra > 0) {
x += extra / 2;
}
// Tile the pages vertically
for (nsIFrame* kidFrame = mFirstChild; nsnull != kidFrame; ) {
// Reflow the page
nsReflowState kidReflowState(kidFrame, aReflowState, pageSize,
reflowReason);
nsReflowStatus status;
// Place and size the page. If the page is narrower than our
// max width then center it horizontally
kidFrame->WillReflow(aPresContext);
kidFrame->MoveTo(x, y);
status = ReflowChild(kidFrame, &aPresContext, kidSize,
kidReflowState);
kidFrame->SetRect(nsRect(x, y, kidSize.width, kidSize.height));
y += kidSize.height;
// Leave a slight gap between the pages
y += PAGE_SPACING_TWIPS;
// Is the page complete?
nsIFrame* kidNextInFlow;
kidFrame->GetNextInFlow(kidNextInFlow);
if (NS_FRAME_IS_COMPLETE(status)) {
NS_ASSERTION(nsnull == kidNextInFlow, "bad child flow list");
} else if (nsnull == kidNextInFlow) {
// The page isn't complete and it doesn't have a next-in-flow so
// create a continuing page
nsIStyleContext* kidSC;
kidFrame->GetStyleContext(&aPresContext, kidSC);
nsIFrame* continuingPage;
nsresult rv = kidFrame->CreateContinuingFrame(aPresContext, this,
kidSC, continuingPage);
NS_RELEASE(kidSC);
reflowReason = eReflowReason_Initial;
// Add it to our child list
#ifdef NS_DEBUG
nsIFrame* kidNextSibling;
kidFrame->GetNextSibling(kidNextSibling);
NS_ASSERTION(nsnull == kidNextSibling, "unexpected sibling");
#endif
kidFrame->SetNextSibling(continuingPage);
mChildCount++;
}
// Get the next page
kidFrame->GetNextSibling(kidFrame);
}
// Return our desired size
aDesiredSize.height = y;
if (aDesiredSize.height < aReflowState.maxSize.height) {
aDesiredSize.height = aReflowState.maxSize.height;
}
aDesiredSize.width = PAGE_SPACING_TWIPS*2 + pageSize.width;
if (aDesiredSize.width < aReflowState.maxSize.width) {
aDesiredSize.width = aReflowState.maxSize.width;
}
} else {
// Allow the frame to be as wide as our max width, and as high
// as it wants to be.
nsSize maxSize(aReflowState.maxSize.width, NS_UNCONSTRAINEDSIZE);
nsReflowState kidReflowState(mFirstChild, aReflowState, maxSize, reflowReason);
// Get the child's desired size. Our child's desired height is our
// desired size
mFirstChild->WillReflow(aPresContext);
aStatus = ReflowChild(mFirstChild, &aPresContext, aDesiredSize, kidReflowState);
NS_ASSERTION(NS_FRAME_IS_COMPLETE(aStatus), "bad status");
// Place and size the child. Make sure the child is at least as
// tall as our max size (the containing window)
if (aDesiredSize.height < aReflowState.maxSize.height) {
aDesiredSize.height = aReflowState.maxSize.height;
}
// Place and size the child
nsRect rect(0, 0, aDesiredSize.width, aDesiredSize.height);
mFirstChild->SetRect(rect);
// Do the necessary repainting
if (eReflowReason_Initial == reflowReason) {
// Repaint the visible area
Invalidate(nsRect(0, 0, aReflowState.maxSize.width, aReflowState.maxSize.height));
} else if (eReflowReason_Resize == aReflowState.reason) {
// Repaint the entire frame
Invalidate(nsRect(0, 0, aReflowState.maxSize.width, aDesiredSize.height));
}
}
}
else {
aDesiredSize.width = aReflowState.maxSize.width;
aDesiredSize.height = aReflowState.maxSize.height;
aDesiredSize.ascent = aDesiredSize.height;
aDesiredSize.descent = 0;
if (nsnull != aDesiredSize.maxElementSize) {
aDesiredSize.maxElementSize->width = 0;
aDesiredSize.maxElementSize->height = 0;
}
}
}
// We are always a pseudo-frame; make sure our content offset is
// properly pushed upwards
nsContainerFrame* parent = (nsContainerFrame*) mGeometricParent;
parent->PropagateContentOffsets(this, mFirstContentOffset,
mLastContentOffset, mLastContentIsComplete);
#ifdef NS_DEBUG
PostReflowCheck(aStatus);
#endif
NS_FRAME_TRACE_REFLOW_OUT("RootContentFrame::Reflow", aStatus);
return NS_OK;
}
NS_IMETHODIMP
RootContentFrame::Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect)
{
// If we're paginated then fill the dirty rect with white
if (aPresContext.IsPaginated()) {
// Cross hatching would be nicer...
aRenderingContext.SetColor(NS_RGB(255,255,255));
aRenderingContext.FillRect(aDirtyRect);
}
nsContainerFrame::Paint(aPresContext, aRenderingContext, aDirtyRect);
return NS_OK;
}
NS_IMETHODIMP
RootContentFrame::HandleEvent(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus)
{
#if 0
mContent->HandleDOMEvent(aPresContext, (nsEvent*)aEvent, nsnull, DOM_EVENT_INIT, aEventStatus);
#else
nsContainerFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
#endif
if (aEventStatus != nsEventStatus_eConsumeNoDefault) {
switch (aEvent->message) {
case NS_MOUSE_MOVE:
case NS_MOUSE_ENTER:
{
nsIFrame* target = this;
nsIContent* mTargetContent = mContent;
PRInt32 cursor;
GetCursorAndContentAt(aPresContext, aEvent->point, &target, &mTargetContent, cursor);
if (cursor == NS_STYLE_CURSOR_INHERIT) {
cursor = NS_STYLE_CURSOR_DEFAULT;
}
nsCursor c;
switch (cursor) {
default:
case NS_STYLE_CURSOR_DEFAULT:
c = eCursor_standard;
break;
case NS_STYLE_CURSOR_HAND:
c = eCursor_hyperlink;
break;
case NS_STYLE_CURSOR_IBEAM:
c = eCursor_select;
break;
}
nsIWidget* window;
target->GetWindow(window);
window->SetCursor(c);
NS_RELEASE(window);
//If the content object under the cursor has changed, fire a mouseover/out
nsIEventStateManager *mStateManager;
nsIContent *mLastContent;
if (NS_OK == aPresContext.GetEventStateManager(&mStateManager)) {
mStateManager->GetLastMouseOverContent(&mLastContent);
if (mLastContent != mTargetContent) {
if (nsnull != mLastContent) {
//fire mouseout
nsEventStatus mStatus = nsEventStatus_eIgnore;
nsMouseEvent mEvent;
mEvent.eventStructType = NS_MOUSE_EVENT;
mEvent.message = NS_MOUSE_EXIT;
mLastContent->HandleDOMEvent(aPresContext, &mEvent, nsnull, DOM_EVENT_INIT, mStatus);
}
//fire mouseover
nsEventStatus mStatus = nsEventStatus_eIgnore;
nsMouseEvent mEvent;
mEvent.eventStructType = NS_MOUSE_EVENT;
mEvent.message = NS_MOUSE_ENTER;
mTargetContent->HandleDOMEvent(aPresContext, &mEvent, nsnull, DOM_EVENT_INIT, mStatus);
mStateManager->SetLastMouseOverContent(mTargetContent);
}
NS_RELEASE(mStateManager);
NS_IF_RELEASE(mLastContent);
}
}
break;
case NS_MOUSE_EXIT:
//Don't know if this is actually hooked up.
{
//Fire of mouseout to the last content object.
nsIEventStateManager *mStateManager;
nsIContent *mLastContent;
if (NS_OK == aPresContext.GetEventStateManager(&mStateManager)) {
mStateManager->GetLastMouseOverContent(&mLastContent);
if (nsnull != mLastContent) {
//fire mouseout
nsEventStatus mStatus = nsEventStatus_eIgnore;
nsMouseEvent mEvent;
mEvent.eventStructType = NS_MOUSE_EVENT;
mEvent.message = NS_MOUSE_EXIT;
mLastContent->HandleDOMEvent(aPresContext, &mEvent, nsnull, DOM_EVENT_INIT, mStatus);
mStateManager->SetLastMouseOverContent(nsnull);
NS_RELEASE(mLastContent);
}
NS_RELEASE(mStateManager);
}
}
break;
case NS_MOUSE_LEFT_BUTTON_UP:
{
nsIEventStateManager *mStateManager;
if (NS_OK == aPresContext.GetEventStateManager(&mStateManager)) {
mStateManager->SetActiveLink(nsnull);
NS_RELEASE(mStateManager);
}
}
break;
}
}
return NS_OK;
}
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