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gecko-dev/layout/forms/nsImageControlFrame.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 "nsImageFrame.h"
#include "nsFormControlHelper.h"
#include "nsIFormControlFrame.h"
#include "nsIFormControl.h"
#include "nsHTMLParts.h"
#include "nsIRenderingContext.h"
#include "nsIPresContext.h"
#include "nsIPresShell.h"
#include "nsIStyleContext.h"
#include "nsLeafFrame.h"
#include "nsCSSRendering.h"
#include "nsHTMLIIDs.h"
#include "nsIViewManager.h"
#include "nsISupports.h"
#include "nsHTMLAtoms.h"
#include "nsIView.h"
#include "nsViewsCID.h"
#include "nsIDeviceContext.h"
#include "nsIFontMetrics.h"
#include "nsIImage.h"
#include "nsStyleUtil.h"
#include "nsDOMEvent.h"
#include "nsStyleConsts.h"
#include "nsIHTMLAttributes.h"
#include "nsGenericHTMLElement.h"
#include "nsFormFrame.h"
//Enumeration of possible mouse states used to detect mouse clicks
/*enum nsMouseState {
eMouseNone,
eMouseEnter,
eMouseExit,
eMouseDown,
eMouseUp
};
*/
static NS_DEFINE_IID(kIFormControlFrameIID, NS_IFORMCONTROLFRAME_IID);
static NS_DEFINE_IID(kViewCID, NS_VIEW_CID);
static NS_DEFINE_IID(kIViewIID, NS_IVIEW_IID);
#define nsImageControlFrameSuper nsImageFrame
class nsImageControlFrame : public nsImageControlFrameSuper,
public nsIFormControlFrame
{
public:
nsImageControlFrame();
NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
NS_IMETHOD Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD HandleEvent(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus);
NS_IMETHOD GetFrameName(nsString& aResult) const {
return MakeFrameName("ImageControl", aResult);
}
NS_IMETHOD GetCursor(nsIPresContext& aPresContext,
nsPoint& aPoint,
PRInt32& aCursor);
virtual void MouseClicked(nsIPresContext* aPresContext);
virtual void SetFormFrame(nsFormFrame* aFormFrame) { mFormFrame = aFormFrame; }
PRBool IsSuccessful(nsIFormControlFrame* aSubmitter);
virtual PRInt32 GetMaxNumValues();
virtual PRBool GetNamesValues(PRInt32 aMaxNumValues, PRInt32& aNumValues,
nsString* aValues, nsString* aNames);
NS_IMETHOD GetType(PRInt32* aType) const;
NS_IMETHOD GetName(nsString* aName);
virtual void Reset() {};
void SetFocus(PRBool aOn, PRBool aRepaint);
void ScrollIntoView(nsIPresContext* aPresContext);
NS_IMETHOD GetFont(nsIPresContext* aPresContext,
nsFont& aFont);
NS_IMETHOD GetFormContent(nsIContent*& aContent) const;
virtual nscoord GetVerticalInsidePadding(nsIPresContext& aPresContext,
float aPixToTwip,
nscoord aInnerHeight) const;
virtual nscoord GetHorizontalInsidePadding(nsIPresContext& aPresContext,
float aPixToTwip,
nscoord aInnerWidth,
nscoord aCharWidth) const;
virtual nsresult RequiresWidget(PRBool &aRequiresWidget);
// nsIFormControlFrame
NS_IMETHOD SetProperty(nsIAtom* aName, const nsString& aValue);
NS_IMETHOD GetProperty(nsIAtom* aName, nsString& aValue);
NS_IMETHOD SetSuggestedSize(nscoord aWidth, nscoord aHeight);
protected:
void GetTranslatedRect(nsRect& aRect); // XXX this implementation is a copy of nsHTMLButtonControlFrame
NS_IMETHOD_(nsrefcnt) AddRef(void);
NS_IMETHOD_(nsrefcnt) Release(void);
nsFormFrame* mFormFrame;
nsMouseState mLastMouseState;
nsPoint mLastClickPoint;
nsCursor mPreviousCursor;
nsRect mTranslatedRect;
PRBool mGotFocus;
};
nsImageControlFrame::nsImageControlFrame()
{
mLastMouseState = eMouseNone;
mLastClickPoint = nsPoint(0,0);
mPreviousCursor = eCursor_standard;
mTranslatedRect = nsRect(0,0,0,0);
mGotFocus = PR_FALSE;
mFormFrame = nsnull;
}
nsresult
NS_NewImageControlFrame(nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsImageControlFrame* it = new nsImageControlFrame;
if (!it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aNewFrame = it;
return NS_OK;
}
nsresult
nsImageControlFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
NS_PRECONDITION(0 != aInstancePtr, "null ptr");
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(kIFormControlFrameIID)) {
*aInstancePtr = (void*) ((nsIFormControlFrame*) this);
return NS_OK;
}
return nsImageControlFrameSuper::QueryInterface(aIID, aInstancePtr);
}
nsrefcnt nsImageControlFrame::AddRef(void)
{
NS_WARNING("not supported");
return 1;
}
nsrefcnt nsImageControlFrame::Release(void)
{
NS_WARNING("not supported");
return 1;
}
NS_METHOD
nsImageControlFrame::Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
if (!mFormFrame && (eReflowReason_Initial == aReflowState.reason)) {
// add ourself as an nsIFormControlFrame
nsFormFrame::AddFormControlFrame(aPresContext, *this);
// create our view, we need a view to grab the mouse
nsIView* view;
GetView(&view);
if (!view) {
nsresult result = nsComponentManager::CreateInstance(kViewCID, nsnull, kIViewIID, (void **)&view);
nsCOMPtr<nsIPresShell> presShell;
aPresContext.GetShell(getter_AddRefs(presShell));
nsCOMPtr<nsIViewManager> viewMan;
presShell->GetViewManager(getter_AddRefs(viewMan));
nsIFrame* parWithView;
nsIView *parView;
GetParentWithView(&parWithView);
parWithView->GetView(&parView);
// the view's size is not know yet, but its size will be kept in synch with our frame.
nsRect boundBox(0, 0, 500, 500);
result = view->Init(viewMan, boundBox, parView, nsnull);
view->SetContentTransparency(PR_TRUE);
viewMan->InsertChild(parView, view, 0);
SetView(view);
const nsStyleColor* color = (const nsStyleColor*) mStyleContext->GetStyleData(eStyleStruct_Color);
// set the opacity
viewMan->SetViewOpacity(view, color->mOpacity);
}
}
return nsImageControlFrameSuper::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus);
}
NS_METHOD
nsImageControlFrame::HandleEvent(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus)
{
if (nsFormFrame::GetDisabled(this)) { // XXX cache disabled
return NS_OK;
}
aEventStatus = nsEventStatus_eIgnore;
switch (aEvent->message) {
case NS_MOUSE_LEFT_BUTTON_DOWN:
{
// Store click point for GetNamesValues
float t2p;
aPresContext.GetTwipsToPixels(&t2p);
mLastClickPoint.x = NSTwipsToIntPixels(aEvent->point.x, t2p);
mLastClickPoint.y = NSTwipsToIntPixels(aEvent->point.y, t2p);
mLastMouseState = eMouseDown;
mGotFocus = PR_TRUE;
aEventStatus = nsEventStatus_eConsumeNoDefault;
return NS_OK;
break;
}
case NS_MOUSE_LEFT_BUTTON_UP:
{
if (eMouseDown == mLastMouseState) {
if (nsEventStatus_eConsumeNoDefault != aEventStatus) {
MouseClicked(&aPresContext);
}
}
mLastMouseState = eMouseUp;
aEventStatus = nsEventStatus_eConsumeNoDefault;
return NS_OK;
break;
}
}
return nsImageControlFrameSuper::HandleEvent(aPresContext, aEvent,
aEventStatus);
}
void
nsImageControlFrame::SetFocus(PRBool aOn, PRBool aRepaint)
{
mGotFocus = aOn;
/*if (aRepaint) {
nsRect rect(0, 0, mRect.width, mRect.height);
Invalidate(rect, PR_TRUE);
}*/
}
void
nsImageControlFrame::ScrollIntoView(nsIPresContext* aPresContext)
{
if (aPresContext) {
nsCOMPtr<nsIPresShell> presShell;
aPresContext->GetShell(getter_AddRefs(presShell));
presShell->ScrollFrameIntoView(this,
NS_PRESSHELL_SCROLL_ANYWHERE,NS_PRESSHELL_SCROLL_ANYWHERE);
}
}
void
nsImageControlFrame::GetTranslatedRect(nsRect& aRect)
{
nsIView* view;
nsPoint viewOffset(0,0);
GetOffsetFromView(viewOffset, &view);
while (nsnull != view) {
nsPoint tempOffset;
view->GetPosition(&tempOffset.x, &tempOffset.y);
viewOffset += tempOffset;
view->GetParent(view);
}
aRect = nsRect(viewOffset.x, viewOffset.y, mRect.width, mRect.height);
}
NS_IMETHODIMP
nsImageControlFrame::GetType(PRInt32* aType) const
{
*aType = NS_FORM_INPUT_IMAGE;
return NS_OK;
}
NS_IMETHODIMP
nsImageControlFrame::GetName(nsString* aResult)
{
if (nsnull == aResult) {
return NS_OK;
} else {
return nsFormFrame::GetName(this, *aResult);
}
}
PRBool
nsImageControlFrame::IsSuccessful(nsIFormControlFrame* aSubmitter)
{
return (this == (aSubmitter));
}
PRInt32
nsImageControlFrame::GetMaxNumValues()
{
return 2;
}
PRBool
nsImageControlFrame::GetNamesValues(PRInt32 aMaxNumValues, PRInt32& aNumValues,
nsString* aValues, nsString* aNames)
{
if (aMaxNumValues <= 0) {
return PR_FALSE;
}
char buf[20];
aNumValues = 2;
aValues[0].SetLength(0);
sprintf(&buf[0], "%d", mLastClickPoint.x);
aValues[0].Append(&buf[0]);
aValues[1].SetLength(0);
sprintf(&buf[0], "%d", mLastClickPoint.y);
aValues[1].Append(&buf[0]);
nsAutoString name;
nsresult result = GetName(&name);
if (NS_CONTENT_ATTR_HAS_VALUE == result) {
aNames[0] = name;
aNames[0].Append(".x");
aNames[1] = name;
aNames[1].Append(".y");
} else {
// If the Image Element has no name, simply return x and y
// to Nav and IE compatability.
aNames[0] = "x";
aNames[1] = "y";
}
return PR_TRUE;
}
NS_IMETHODIMP
nsImageControlFrame::GetCursor(nsIPresContext& aPresContext,
nsPoint& aPoint,
PRInt32& aCursor)
{
// Use style defined cursor if one is provided, otherwise when
// the cursor style is "auto" we use the pointer cursor.
const nsStyleColor* styleColor;
GetStyleData(eStyleStruct_Color, (const nsStyleStruct*&)styleColor);
NS_ASSERTION(styleColor,"null color style struct");
if (styleColor) {
aCursor = styleColor->mCursor;
if (NS_STYLE_CURSOR_AUTO == aCursor) {
aCursor = NS_STYLE_CURSOR_POINTER;
}
} else {
aCursor = NS_STYLE_CURSOR_POINTER;
}
return NS_OK;
}
void
nsImageControlFrame::MouseClicked(nsIPresContext* aPresContext)
{
PRInt32 type;
GetType(&type);
if ((nsnull != mFormFrame) && !nsFormFrame::GetDisabled(this)) {
nsIContent *formContent = nsnull;
mFormFrame->GetContent(&formContent);
nsEventStatus status;
nsEvent event;
event.eventStructType = NS_EVENT;
event.message = NS_FORM_SUBMIT;
if (nsnull != formContent) {
formContent->HandleDOMEvent(*aPresContext, &event, nsnull, NS_EVENT_FLAG_INIT, status);
NS_RELEASE(formContent);
}
if (nsEventStatus_eConsumeNoDefault != status) {
mFormFrame->OnSubmit(aPresContext, this);
}
}
}
NS_IMETHODIMP
nsImageControlFrame::GetFont(nsIPresContext* aPresContext,
nsFont& aFont)
{
nsFormControlHelper::GetFont(this, aPresContext, mStyleContext, aFont);
return NS_OK;
}
NS_IMETHODIMP
nsImageControlFrame::GetFormContent(nsIContent*& aContent) const
{
nsIContent* content;
nsresult rv;
rv = GetContent(&content);
aContent = content;
return rv;
}
nscoord
nsImageControlFrame::GetVerticalInsidePadding(nsIPresContext& aPresContext,
float aPixToTwip,
nscoord aInnerHeight) const
{
return 0;
}
nscoord
nsImageControlFrame::GetHorizontalInsidePadding(nsIPresContext& aPresContext,
float aPixToTwip,
nscoord aInnerWidth,
nscoord aCharWidth) const
{
return 0;
}
nsresult nsImageControlFrame::RequiresWidget(PRBool& aRequiresWidget)
{
aRequiresWidget = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP nsImageControlFrame::SetProperty(nsIAtom* aName, const nsString& aValue)
{
return NS_OK;
}
NS_IMETHODIMP nsImageControlFrame::GetProperty(nsIAtom* aName, nsString& aValue)
{
return NS_OK;
}
NS_IMETHODIMP nsImageControlFrame::SetSuggestedSize(nscoord aWidth, nscoord aHeight)
{
// mSuggestedWidth = aWidth;
// mSuggestedHeight = aHeight;
return NS_OK;
}
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