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Enable the <maction> tag -- pending issue: a dynamic action that reduces the number of lines of screen does not totally erase the last line on a half-full screen

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rbs%maths.uq.edu.au 2000-02-07 08:47:48 +00:00
parent d3f1ff5f73
commit d866cb1475
5 changed files with 596 additions and 0 deletions
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1
layout/mathml/base/src/Makefile.in
View File

@ -62,6 +62,7 @@ CPPSRCS = nsMathMLChar.cpp \
nsMathMLmstyleFrame.cpp \
nsMathMLmsqrtFrame.cpp \
nsMathMLmrootFrame.cpp \
nsMathMLmactionFrame.cpp \
$(NULL)
include $(topsrcdir)/config/config.mk

2
layout/mathml/base/src/makefile.win
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@ -51,6 +51,7 @@ CPPSRCS= nsMathMLChar.cpp \
nsMathMLmstyleFrame.cpp \
nsMathMLmsqrtFrame.cpp \
nsMathMLmrootFrame.cpp \
nsMathMLmactionFrame.cpp \
$(NULL)
CPP_OBJS= .\$(OBJDIR)\nsMathMLChar.obj \
@ -76,6 +77,7 @@ CPP_OBJS= .\$(OBJDIR)\nsMathMLChar.obj \
.\$(OBJDIR)\nsMathMLmstyleFrame.obj \
.\$(OBJDIR)\nsMathMLmsqrtFrame.obj \
.\$(OBJDIR)\nsMathMLmrootFrame.obj \
.\$(OBJDIR)\nsMathMLmactionFrame.obj \
$(NULL)
EXPORTS = \

1
layout/mathml/base/src/nsMathMLParts.h
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@ -47,5 +47,6 @@ extern nsresult NS_NewMathMLmstyleFrame ( nsIPresShell* aPresShell, nsIFrame** a
extern nsresult NS_NewMathMLmtdFrame ( nsIPresShell* aPresShell, nsIFrame** aNewFrame );
extern nsresult NS_NewMathMLmsqrtFrame( nsIPresShell* aPresShell, nsIFrame** aNewFrame );
extern nsresult NS_NewMathMLmrootFrame( nsIPresShell* aPresShell, nsIFrame** aNewFrame );
extern nsresult NS_NewMathMLmactionFrame( nsIPresShell* aPresShell, nsIFrame** aNewFrame );
#endif /* nsMathMLParts_h___ */

474
layout/mathml/base/src/nsMathMLmactionFrame.cpp Normal file
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@ -0,0 +1,474 @@
/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Mozilla MathML Project.
*
* The Initial Developer of the Original Code is The University Of
* Queensland. Portions created by The University Of Queensland are
* Copyright (C) 1999 The University Of Queensland. All Rights Reserved.
*
* Contributor(s):
* Roger B. Sidje <rbs@maths.uq.edu.au>
*/
#include "nsCOMPtr.h"
#include "nsHTMLParts.h"
#include "nsIHTMLContent.h"
#include "nsFrame.h"
#include "nsLineLayout.h"
#include "nsHTMLIIDs.h"
#include "nsIPresContext.h"
#include "nsHTMLAtoms.h"
#include "nsUnitConversion.h"
#include "nsIStyleContext.h"
#include "nsStyleConsts.h"
#include "nsINameSpaceManager.h"
#include "nsIRenderingContext.h"
#include "nsIFontMetrics.h"
#include "nsStyleUtil.h"
#include "nsCSSRendering.h"
#include "prprf.h" // For PR_snprintf()
#include "nsIWebShell.h"
#include "nsIBrowserWindow.h"
#include "nsIDocShellTreeItem.h"
#include "nsIDOMElement.h"
#include "nsIDOMEventReceiver.h"
#include "nsIDOMMouseListener.h"
#include "nsMathMLmactionFrame.h"
//
// <maction> -- bind actions to a subexpression - implementation
//
#define NS_MATHML_ACTION_TYPE_NONE 0
#define NS_MATHML_ACTION_TYPE_TOGGLE 1
#define NS_MATHML_ACTION_TYPE_STATUSLINE 2
#define NS_MATHML_ACTION_TYPE_TOOLTIP 3 // unsupported
#define NS_MATHML_ACTION_TYPE_RESTYLE 4
NS_INTERFACE_MAP_BEGIN(nsMathMLmactionFrame)
NS_INTERFACE_MAP_ENTRY(nsIDOMMouseListener)
NS_INTERFACE_MAP_END_INHERITING(nsMathMLContainerFrame)
NS_IMETHODIMP_(nsrefcnt)
nsMathMLmactionFrame::AddRef(void)
{
return NS_OK;
}
NS_IMETHODIMP_(nsrefcnt)
nsMathMLmactionFrame::Release(void)
{
return NS_OK;
}
nsresult
NS_NewMathMLmactionFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsMathMLmactionFrame* it = new (aPresShell) nsMathMLmactionFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aNewFrame = it;
return NS_OK;
}
nsMathMLmactionFrame::nsMathMLmactionFrame()
{
}
nsMathMLmactionFrame::~nsMathMLmactionFrame()
{
// unregister us as a mouse event listener ...
// printf("maction:%p unregistering as mouse event listener ...\n", this);
nsCOMPtr<nsIDOMEventReceiver> receiver(do_QueryInterface(mContent));
receiver->RemoveEventListenerByIID(this, NS_GET_IID(nsIDOMMouseListener));
}
NS_IMETHODIMP
nsMathMLmactionFrame::Init(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow)
{
nsresult rv = NS_OK;
nsAutoString value, prefix;
// Init our local attributes
mPresContext = aPresContext;
mChildCount = -1; // these will be updated in GetSelectedFrame()
mSelection = 0;
mSelectedFrame = nsnull;
mActionType = NS_MATHML_ACTION_TYPE_NONE;
if (NS_CONTENT_ATTR_HAS_VALUE == aContent->GetAttribute(kNameSpaceID_None,
nsMathMLAtoms::actiontype_, value)) {
if (value == "toggle")
mActionType = NS_MATHML_ACTION_TYPE_TOGGLE;
// XXX use goto to jump out of these if?
if (NS_MATHML_ACTION_TYPE_NONE == mActionType) {
prefix = "tooltip#"; // expected tooltip prefix (8ch)...
if (8 < value.Length() && 0 == value.Find(prefix))
mActionType = NS_MATHML_ACTION_TYPE_TOOLTIP;
}
if (NS_MATHML_ACTION_TYPE_NONE == mActionType) {
prefix = "statusline#"; // expected statusline prefix (11ch)...
if (11 < value.Length() && 0 == value.Find(prefix))
mActionType = NS_MATHML_ACTION_TYPE_STATUSLINE;
}
if (NS_MATHML_ACTION_TYPE_NONE == mActionType) {
prefix = "restyle#"; // expected restyle prefix (8ch)...
if (8 < value.Length() && 0 == value.Find(prefix)) {
mActionType = NS_MATHML_ACTION_TYPE_RESTYLE;
mRestyle = value;
// Here is the situation:
// When the attribute [actiontype="restyle#id"] is set, the Style System has
// given us the associated style. But we want to start with our default style.
// So... first, remove the attribute actiontype="restyle#id"
value = "";
PRBool notify = PR_FALSE; // don't trigger a reflow yet!
aContent->SetAttribute(kNameSpaceID_None, nsMathMLAtoms::actiontype_, value, notify);
// then, re-resolve our style
nsCOMPtr<nsIStyleContext> parentStyleContext;
aParent->GetStyleContext(getter_AddRefs(parentStyleContext));
nsIStyleContext* newStyleContext;
aPresContext->ResolveStyleContextFor(aContent, parentStyleContext,
PR_FALSE, &newStyleContext);
if (!newStyleContext)
mRestyle.Truncate();
else {
if (newStyleContext != aContext)
aContext = newStyleContext;
else {
NS_RELEASE(newStyleContext);
mRestyle.Truncate();
}
}
}
}
}
// Let the base class do the rest
return nsMathMLContainerFrame::Init(aPresContext, aContent, aParent, aContext, aPrevInFlow);
}
// return the frame whose number is given by the attribute selection="number"
nsIFrame*
nsMathMLmactionFrame::GetSelectedFrame()
{
nsresult rv = NS_OK;
nsAutoString value;
PRInt32 selection;
if (NS_CONTENT_ATTR_HAS_VALUE == mContent->GetAttribute(kNameSpaceID_None,
nsMathMLAtoms::selection_, value)) {
PRInt32 errorCode;
selection = value.ToInteger(&errorCode);
if (NS_FAILED(errorCode))
selection = 1;
}
else selection = 1; // default is first frame
if (-1 != mChildCount) { // we have been in this function before...
// cater for invalid user-supplied selection
if (selection > mChildCount || selection < 1)
selection = 1;
// quick return if it is identical with our cache
if (selection == mSelection)
return mSelectedFrame;
}
// get the selected child and cache new values...
PRInt32 count = 0;
nsIFrame* childFrame = mFrames.FirstChild();
while (childFrame) {
if (!IsOnlyWhitespace(childFrame)) {
if (!mSelectedFrame)
mSelectedFrame = childFrame; // default is first child
if (++count == selection)
mSelectedFrame = childFrame;
}
childFrame->GetNextSibling(&childFrame);
}
// cater for invalid user-supplied selection
if (selection > count || selection < 1)
selection = 1;
mChildCount = count;
mSelection = selection;
// if the selected child is an embellished operator,
// we become embellished as well
mEmbellishData.flags &= ~NS_MATHML_EMBELLISH_OPERATOR;
mEmbellishData.firstChild = nsnull;
mEmbellishData.core = nsnull;
mEmbellishData.direction = NS_STRETCH_DIRECTION_UNSUPPORTED;
if (mSelectedFrame) {
nsIMathMLFrame* aMathMLFrame = nsnull;
rv = mSelectedFrame->QueryInterface(nsIMathMLFrame::GetIID(), (void**)&aMathMLFrame);
if (NS_SUCCEEDED(rv) && aMathMLFrame) {
nsEmbellishData embellishData;
aMathMLFrame->GetEmbellishData(embellishData);
if (NS_MATHML_IS_EMBELLISH_OPERATOR(embellishData.flags) && embellishData.firstChild) {
mEmbellishData.flags |= NS_MATHML_EMBELLISH_OPERATOR;
mEmbellishData.firstChild = mSelectedFrame; // yes!
mEmbellishData.core = embellishData.core;
mEmbellishData.direction = embellishData.direction;
}
}
}
return mSelectedFrame;
}
NS_IMETHODIMP
nsMathMLmactionFrame::SetInitialChildList(nsIPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList)
{
nsresult rv = nsMathMLContainerFrame::SetInitialChildList(aPresContext, aListName, aChildList);
// This very first call to GetSelectedFrame() will cause us to be marked as an
// embellished operator if the selected child is an embellished operator,
GetSelectedFrame();
// register us as a mouse event listener ...
// printf("maction:%p registering as mouse event listener ...\n", this);
nsCOMPtr<nsIDOMEventReceiver> receiver(do_QueryInterface(mContent));
receiver->AddEventListenerByIID(this, NS_GET_IID(nsIDOMMouseListener));
return rv;
}
// Return the selected frame ...
NS_IMETHODIMP
nsMathMLmactionFrame::GetFrameForPoint(nsIPresContext* aPresContext,
const nsPoint& aPoint,
nsIFrame** aFrame)
{
nsIFrame* childFrame = GetSelectedFrame();
if (childFrame)
return childFrame->GetFrameForPoint(aPresContext, aPoint, aFrame);
else
*aFrame = this;
return NS_OK;
}
// Only paint the selected child...
NS_IMETHODIMP
nsMathMLmactionFrame::Paint(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer)
{
const nsStyleDisplay* disp =
(const nsStyleDisplay*)mStyleContext->GetStyleData(eStyleStruct_Display);
if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
if (disp->mVisible && mRect.width && mRect.height) {
// Paint our background and border
PRIntn skipSides = GetSkipSides();
const nsStyleColor* color = (const nsStyleColor*)
mStyleContext->GetStyleData(eStyleStruct_Color);
const nsStyleSpacing* spacing = (const nsStyleSpacing*)
mStyleContext->GetStyleData(eStyleStruct_Spacing);
nsRect rect(0, 0, mRect.width, mRect.height);
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *color, *spacing, 0, 0);
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *spacing, mStyleContext, skipSides);
nsCSSRendering::PaintOutline(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *spacing, mStyleContext, 0);
}
}
nsIFrame* childFrame = GetSelectedFrame();
if (childFrame)
PaintChild(aPresContext, aRenderingContext, aDirtyRect, childFrame, aWhichLayer);
return NS_OK;
}
// Only reflow the selected child ...
NS_IMETHODIMP
nsMathMLmactionFrame::ReflowChildren(PRInt32 aDirection,
nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
nsresult rv = NS_OK;
aStatus = NS_FRAME_COMPLETE;
nsIFrame* childFrame = GetSelectedFrame();
aDesiredSize.width = aDesiredSize.height = aDesiredSize.ascent = aDesiredSize.descent = 0;
if (childFrame) {
// ask the child to compute its bounding metrics
nsHTMLReflowMetrics childDesiredSize(aDesiredSize.maxElementSize,
aDesiredSize.mFlags | NS_REFLOW_CALC_BOUNDING_METRICS);
nsSize availSize(aReflowState.mComputedWidth, aReflowState.mComputedHeight);
nsHTMLReflowState childReflowState(aPresContext, aReflowState,
childFrame, availSize);
rv = ReflowChild(childFrame, aPresContext, childDesiredSize,
childReflowState, aStatus);
NS_ASSERTION(NS_FRAME_IS_COMPLETE(aStatus), "bad status");
if (NS_FAILED(rv)) return rv;
// origins are used as placeholders to store the child's ascent and descent.
childFrame->SetRect(aPresContext,
nsRect(childDesiredSize.descent, childDesiredSize.ascent,
childDesiredSize.width, childDesiredSize.height));
aDesiredSize.width = childDesiredSize.width;
aDesiredSize.ascent = childDesiredSize.ascent;
aDesiredSize.descent = childDesiredSize.descent;
aDesiredSize.height = childDesiredSize.height;
}
return NS_OK;
}
// Only place the selected child ...
NS_IMETHODIMP
nsMathMLmactionFrame::Place(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
PRBool aPlaceOrigin,
nsHTMLReflowMetrics& aDesiredSize)
{
aDesiredSize.width = aDesiredSize.height = aDesiredSize.ascent = aDesiredSize.descent = 0;
nsIFrame* childFrame = GetSelectedFrame();
if (childFrame) {
GetReflowAndBoundingMetricsFor(childFrame, aDesiredSize, mBoundingMetrics);
if (aPlaceOrigin) {
FinishReflowChild(childFrame, aPresContext, aDesiredSize, 0, 0, 0);
}
mReference.x = 0;
mReference.y = aDesiredSize.ascent - mBoundingMetrics.ascent;
}
return NS_OK;
}
// ################################################################
// Event handlers
// ################################################################
// helper to show a msg on the status bar
// curled from nsObjectFrame.cpp ...
nsresult
nsMathMLmactionFrame::ShowStatus(nsIPresContext* aPresContext,
nsString& aStatusMsg)
{
nsCOMPtr<nsISupports> cont;
nsresult rv = aPresContext->GetContainer(getter_AddRefs(cont));
if (NS_SUCCEEDED(rv) && cont) {
nsCOMPtr<nsIDocShellTreeItem> docShellItem(do_QueryInterface(cont));
if (docShellItem) {
nsCOMPtr<nsIDocShellTreeItem> root;
docShellItem->GetSameTypeRootTreeItem(getter_AddRefs(root));
nsCOMPtr<nsIWebShell> rootWebShell(do_QueryInterface(root));
if (rootWebShell) {
nsCOMPtr<nsIWebShellContainer> rootContainer;
rv = rootWebShell->GetContainer(*getter_AddRefs(rootContainer));
if (nsnull != rootContainer) {
nsCOMPtr<nsIBrowserWindow> browserWindow(do_QueryInterface(rootContainer));
if (browserWindow) {
if (rootContainer) {
rv = browserWindow->SetStatus(aStatusMsg.GetUnicode());
}
}
}
}
}
}
return rv;
}
nsresult
nsMathMLmactionFrame::MouseOver(nsIDOMEvent* aMouseEvent)
{
// see if we should display a status message
if (NS_MATHML_ACTION_TYPE_STATUSLINE == mActionType)
{
nsAutoString value;
if (NS_CONTENT_ATTR_HAS_VALUE == mContent->GetAttribute(kNameSpaceID_None,
nsMathMLAtoms::actiontype_, value))
{
nsAutoString statusline = "statusline#"; // expected statusline prefix (11ch)...
if (11 < value.Length() && 0 == value.Find(statusline)) {
value.Cut(0, 11);
ShowStatus(mPresContext, value);
}
}
}
return NS_OK;
}
nsresult
nsMathMLmactionFrame::MouseOut(nsIDOMEvent* aMouseEvent)
{
// see if we should remove the status message
if (NS_MATHML_ACTION_TYPE_STATUSLINE == mActionType)
{
nsAutoString value = "";
ShowStatus(mPresContext, value);
}
return NS_OK;
}
nsresult
nsMathMLmactionFrame::MouseClick(nsIDOMEvent* aMouseEvent)
{
nsAutoString value;
if (NS_MATHML_ACTION_TYPE_TOGGLE == mActionType)
{
if (mChildCount > 1) {
PRInt32 selection = (mSelection == mChildCount)? 1 : mSelection + 1;
char cbuf[10];
PR_snprintf(cbuf, sizeof(cbuf), "%d", selection);
value = cbuf;
PRBool notify = PR_FALSE; // don't yet notify the document
mContent->SetAttribute(kNameSpaceID_None, nsMathMLAtoms::selection_, value, notify);
// Now trigger a content-changed reflow...
ContentChanged(mPresContext, mContent, nsnull);
}
}
else if (NS_MATHML_ACTION_TYPE_RESTYLE == mActionType)
{
if (0 < mRestyle.Length()) {
nsCOMPtr<nsIDOMElement> node( do_QueryInterface(mContent) );
if (node.get()) {
if (NS_CONTENT_ATTR_HAS_VALUE == mContent->GetAttribute(kNameSpaceID_None,
nsMathMLAtoms::actiontype_, value))
node->RemoveAttribute("actiontype");
else
node->SetAttribute("actiontype", mRestyle);
}
}
}
return NS_OK;
}

118
layout/mathml/base/src/nsMathMLmactionFrame.h Normal file
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@ -0,0 +1,118 @@
/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Mozilla MathML Project.
*
* The Initial Developer of the Original Code is The University Of
* Queensland. Portions created by The University Of Queensland are
* Copyright (C) 1999 The University Of Queensland. All Rights Reserved.
*
* Contributor(s):
* Roger B. Sidje <rbs@maths.uq.edu.au>
*/
#ifndef nsMathMLmactionFrame_h___
#define nsMathMLmactionFrame_h___
#include "nsCOMPtr.h"
#include "nsMathMLContainerFrame.h"
//
// <maction> -- bind actions to a subexpression
//
//#define DEBUG_mouse 1
#if DEBUG_mouse
#define MOUSE(_msg) printf("maction:%p MOUSE: "#_msg" ...\n", this);
#else
#define MOUSE(_msg)
#endif
class nsMathMLmactionFrame : public nsMathMLContainerFrame,
public nsIDOMMouseListener {
public:
friend nsresult NS_NewMathMLmactionFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame);
NS_DECL_ISUPPORTS
NS_IMETHOD
Init(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow);
NS_IMETHOD
SetInitialChildList(nsIPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList);
NS_IMETHOD
GetFrameForPoint(nsIPresContext* aPresContext,
const nsPoint& aPoint,
nsIFrame** aFrame);
NS_IMETHOD
Paint(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer);
NS_IMETHOD
ReflowChildren(PRInt32 aDirection,
nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD
Place(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
PRBool aPlaceOrigin,
nsHTMLReflowMetrics& aDesiredSize);
// nsIDOMMouseListener methods
virtual nsresult MouseDown(nsIDOMEvent* aMouseEvent) { MOUSE(down) return NS_OK; }
virtual nsresult MouseUp(nsIDOMEvent* aMouseEvent) { MOUSE(up) return NS_OK; }
virtual nsresult MouseClick(nsIDOMEvent* aMouseEvent);// { MOUSE(click) return NS_OK; }
virtual nsresult MouseDblClick(nsIDOMEvent* aMouseEvent) { MOUSE(dblclik) return NS_OK; }
virtual nsresult MouseOver(nsIDOMEvent* aMouseEvent);// { MOUSE(over) return NS_OK; }
virtual nsresult MouseOut(nsIDOMEvent* aMouseEvent);// { MOUSE(out) return NS_OK; }
// nsIDOMEventListener methods
virtual nsresult HandleEvent(nsIDOMEvent* aEvent) { MOUSE(event); return NS_OK; }
protected:
nsMathMLmactionFrame();
virtual ~nsMathMLmactionFrame();
virtual PRIntn GetSkipSides() const { return 0; }
private:
nsIPresContext* mPresContext;
PRInt32 mActionType;
PRInt32 mChildCount;
PRInt32 mSelection;
nsIFrame* mSelectedFrame;
nsString mRestyle;
// helper to return the frame for the attribute selection="number"
nsIFrame*
GetSelectedFrame();
// helper to display a message on the status bar
static nsresult
ShowStatus(nsIPresContext* aPresContext,
nsString& aStatusMsg);
};
#endif /* nsMathMLmactionFrame_h___ */