477 lines
14 KiB
C++
477 lines
14 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsICheckButton.h"
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#include "nsFormControlFrame.h"
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#include "nsFormControlHelper.h"
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#include "nsFormFrame.h"
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#include "nsIContent.h"
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#include "prtypes.h"
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#include "nsIFrame.h"
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#include "nsIAtom.h"
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#include "nsIPresContext.h"
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#include "nsIHTMLContent.h"
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#include "nsHTMLIIDs.h"
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#include "nsWidgetsCID.h"
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#include "nsIView.h"
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#include "nsHTMLAtoms.h"
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#include "nsIStyleContext.h"
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#include "nsStyleUtil.h"
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#include "nsIFormControl.h"
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#include "nsIDOMHTMLInputElement.h"
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#include "nsCSSRendering.h"
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#include "nsILookAndFeel.h"
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#include "nsIComponentManager.h"
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#define NS_DEFAULT_CHECKBOX_SIZE 12
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static NS_DEFINE_IID(kICheckButtonIID, NS_ICHECKBUTTON_IID);
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static NS_DEFINE_IID(kIDOMHTMLInputElementIID, NS_IDOMHTMLINPUTELEMENT_IID);
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static NS_DEFINE_IID(kLookAndFeelCID, NS_LOOKANDFEEL_CID);
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static NS_DEFINE_IID(kILookAndFeelIID, NS_ILOOKANDFEEL_IID);
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class nsCheckboxControlFrame : public nsFormControlFrame {
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public:
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nsCheckboxControlFrame();
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virtual void PostCreateWidget(nsIPresContext* aPresContext,
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nscoord& aWidth,
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nscoord& aHeight);
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NS_IMETHOD AttributeChanged(nsIPresContext* aPresContext,
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nsIContent* aChild,
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nsIAtom* aAttribute,
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PRInt32 aHint);
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NS_IMETHOD GetFrameName(nsString& aResult) const {
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return MakeFrameName("CheckboxControl", aResult);
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}
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virtual const nsIID& GetCID();
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virtual const nsIID& GetIID();
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virtual void MouseClicked(nsIPresContext* aPresContext);
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virtual PRInt32 GetMaxNumValues();
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virtual PRBool GetNamesValues(PRInt32 aMaxNumValues, PRInt32& aNumValues,
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nsString* aValues, nsString* aNames);
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virtual void Reset();
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// nsIFormControlFrame
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NS_IMETHOD SetProperty(nsIAtom* aName, const nsString& aValue);
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NS_IMETHOD GetProperty(nsIAtom* aName, nsString& aValue);
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// Utility methods for implementing SetProperty/GetProperty
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void SetCheckboxControlFrameState(const nsString& aValue);
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void GetCheckboxControlFrameState(nsString& aValue);
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// nsFormControlFrame overrides
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nsresult RequiresWidget(PRBool &aHasWidget);
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//
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// Methods used to GFX-render the checkbox
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//
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virtual void PaintCheckBox(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer);
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NS_IMETHOD Paint(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer);
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NS_IMETHOD HandleEvent(nsIPresContext& aPresContext,
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nsGUIEvent* aEvent,
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nsEventStatus& aEventStatus);
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//End of GFX-rendering methods
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protected:
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virtual nscoord GetCheckboxSize(float aPixToTwip) const;
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virtual void GetDesiredSize(nsIPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState,
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nsHTMLReflowMetrics& aDesiredLayoutSize,
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nsSize& aDesiredWidgetSize);
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//GFX-rendered state variables
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PRBool mMouseDownOnCheckbox;
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PRBool mChecked;
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};
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nsresult
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NS_NewCheckboxControlFrame(nsIFrame** aNewFrame)
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{
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NS_PRECONDITION(aNewFrame, "null OUT ptr");
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if (nsnull == aNewFrame) {
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return NS_ERROR_NULL_POINTER;
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}
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nsCheckboxControlFrame* it = new nsCheckboxControlFrame;
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if (!it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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*aNewFrame = it;
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return NS_OK;
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}
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nsCheckboxControlFrame::nsCheckboxControlFrame()
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{
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// Initialize GFX-rendered state
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mMouseDownOnCheckbox = PR_FALSE;
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mChecked = PR_FALSE;
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}
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const nsIID&
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nsCheckboxControlFrame::GetIID()
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{
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static NS_DEFINE_IID(kCheckboxIID, NS_ICHECKBUTTON_IID);
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return kCheckboxIID;
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}
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const nsIID&
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nsCheckboxControlFrame::GetCID()
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{
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static NS_DEFINE_IID(kCheckboxCID, NS_CHECKBUTTON_CID);
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return kCheckboxCID;
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}
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nscoord
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nsCheckboxControlFrame::GetCheckboxSize(float aPixToTwip) const
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{
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nsILookAndFeel * lookAndFeel;
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PRInt32 checkboxSize = 0;
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if (NS_OK == nsComponentManager::CreateInstance(kLookAndFeelCID, nsnull, kILookAndFeelIID, (void**)&lookAndFeel)) {
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lookAndFeel->GetMetric(nsILookAndFeel::eMetric_CheckboxSize, checkboxSize);
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NS_RELEASE(lookAndFeel);
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}
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if (checkboxSize == 0)
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checkboxSize = NS_DEFAULT_CHECKBOX_SIZE;
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return NSIntPixelsToTwips(checkboxSize, aPixToTwip);
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}
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void
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nsCheckboxControlFrame::GetDesiredSize(nsIPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState,
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nsHTMLReflowMetrics& aDesiredLayoutSize,
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nsSize& aDesiredWidgetSize)
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{
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float p2t;
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aPresContext->GetScaledPixelsToTwips(&p2t);
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nsWidgetRendering mode;
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aPresContext->GetWidgetRenderingMode(&mode);
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if (eWidgetRendering_Gfx == mode) {
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nsFormControlFrame::GetDesiredSize(aPresContext, aReflowState,
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aDesiredLayoutSize, aDesiredWidgetSize);
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} else {
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aDesiredWidgetSize.width = GetCheckboxSize(p2t);
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aDesiredWidgetSize.height = aDesiredWidgetSize.width;
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aDesiredLayoutSize.width = aDesiredWidgetSize.width;
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aDesiredLayoutSize.height = aDesiredWidgetSize.height;
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aDesiredLayoutSize.ascent = aDesiredLayoutSize.height;
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aDesiredLayoutSize.descent = 0;
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if (aDesiredLayoutSize.maxElementSize) {
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aDesiredLayoutSize.maxElementSize->width = aDesiredLayoutSize.width;
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aDesiredLayoutSize.maxElementSize->height = aDesiredLayoutSize.height;
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}
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}
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}
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void
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nsCheckboxControlFrame::PostCreateWidget(nsIPresContext* aPresContext, nscoord& aWidth, nscoord& aHeight)
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{
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// set the widget to the initial state
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PRBool checked = PR_FALSE;
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nsresult result = GetDefaultCheckState(&checked);
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if (NS_CONTENT_ATTR_HAS_VALUE == result) {
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if (PR_TRUE == checked)
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SetProperty(nsHTMLAtoms::checked, NS_STRING_TRUE);
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else
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SetProperty(nsHTMLAtoms::checked, NS_STRING_FALSE);
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}
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if (mWidget != nsnull) {
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SetColors(*aPresContext);
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mWidget->Enable(!nsFormFrame::GetDisabled(this));
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}
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}
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NS_IMETHODIMP
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nsCheckboxControlFrame::AttributeChanged(nsIPresContext* aPresContext,
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nsIContent* aChild,
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nsIAtom* aAttribute,
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PRInt32 aHint)
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{
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nsresult result = NS_OK;
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if (mWidget) {
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if (nsHTMLAtoms::checked == aAttribute) {
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nsICheckButton* button = nsnull;
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result = mWidget->QueryInterface(GetIID(), (void**)&button);
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if ((NS_SUCCEEDED(result)) && (nsnull != button)) {
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PRBool checkedAttr;
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GetCurrentCheckState(&checkedAttr);
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PRBool checkedPrevState;
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button->GetState(checkedPrevState);
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if (checkedAttr != checkedPrevState) {
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button->SetState(checkedAttr);
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}
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NS_RELEASE(button);
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}
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}
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// Allow the base class to handle common attributes supported
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// by all form elements...
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else {
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result = nsFormControlFrame::AttributeChanged(aPresContext, aChild, aAttribute, aHint);
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}
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}
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return result;
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}
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void
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nsCheckboxControlFrame::MouseClicked(nsIPresContext* aPresContext)
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{
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mMouseDownOnCheckbox = PR_FALSE;
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PRBool oldState;
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GetCurrentCheckState(&oldState);
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PRBool newState = oldState ? PR_FALSE : PR_TRUE;
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SetCurrentCheckState(newState);
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}
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PRInt32
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nsCheckboxControlFrame::GetMaxNumValues()
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{
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return 1;
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}
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PRBool
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nsCheckboxControlFrame::GetNamesValues(PRInt32 aMaxNumValues, PRInt32& aNumValues,
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nsString* aValues, nsString* aNames)
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{
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nsAutoString name;
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nsresult nameResult = GetName(&name);
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if ((aMaxNumValues <= 0) || (NS_CONTENT_ATTR_HAS_VALUE != nameResult)) {
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return PR_FALSE;
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}
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PRBool result = PR_TRUE;
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nsAutoString value;
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nsresult valueResult = GetValue(&value);
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nsICheckButton* checkBox = nsnull;
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if ((nsnull != mWidget) &&
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(NS_OK == mWidget->QueryInterface(kICheckButtonIID,(void**)&checkBox))) {
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PRBool state = PR_FALSE;
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checkBox->GetState(state);
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if (PR_TRUE != state) {
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result = PR_FALSE;
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} else {
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if (NS_CONTENT_ATTR_HAS_VALUE != valueResult) {
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aValues[0] = "on";
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} else {
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aValues[0] = value;
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}
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aNames[0] = name;
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aNumValues = 1;
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}
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NS_RELEASE(checkBox);
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}
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return result;
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}
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void
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nsCheckboxControlFrame::Reset()
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{
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PRBool checked;
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GetDefaultCheckState(&checked);
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SetCurrentCheckState(checked);
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}
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void
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nsCheckboxControlFrame::PaintCheckBox(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer)
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{
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aRenderingContext.PushState();
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float p2t;
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aPresContext.GetScaledPixelsToTwips(&p2t);
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PRBool checked = PR_FALSE;
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// Get current checked state through content model.
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// XXX: This is very inefficient, but it is necessary in the case of printing.
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// During printing the Paint is called but the actual state of the checkbox
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// is in a frame in presentation shell 0.
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/*XXXnsresult result = */GetCurrentCheckState(&checked);
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if (PR_TRUE == checked) {
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// Draw check mark
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const nsStyleColor* color = (const nsStyleColor*)
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mStyleContext->GetStyleData(eStyleStruct_Color);
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aRenderingContext.SetColor(color->mColor);
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nsFormControlHelper::PaintCheckMark(aRenderingContext,
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p2t, mRect.width, mRect.height);
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}
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PRBool clip;
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aRenderingContext.PopState(clip);
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}
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NS_METHOD
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nsCheckboxControlFrame::Paint(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer)
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{
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const nsStyleDisplay* disp = (const nsStyleDisplay*)
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mStyleContext->GetStyleData(eStyleStruct_Display);
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if (!disp->mVisible)
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return NS_OK;
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// Paint the background
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nsFormControlFrame::Paint(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
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if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer) {
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// Paint the checkmark
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PaintCheckBox(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
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}
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return NS_OK;
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}
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NS_METHOD nsCheckboxControlFrame::HandleEvent(nsIPresContext& aPresContext,
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nsGUIEvent* aEvent,
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nsEventStatus& aEventStatus)
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{
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if (nsEventStatus_eConsumeNoDefault == aEventStatus) {
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return NS_OK;
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}
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switch(aEvent->message) {
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case NS_KEY_PRESS:
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if (NS_KEY_EVENT == aEvent->eventStructType) {
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nsKeyEvent* keyEvent = (nsKeyEvent*)aEvent;
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if (NS_VK_SPACE == keyEvent->keyCode || NS_VK_RETURN == keyEvent->keyCode) {
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MouseClicked(&aPresContext);
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}
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}
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break;
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default:
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break;
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}
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if (nsnull == mWidget) {
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// Handle GFX rendered widget Mouse Down event
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PRInt32 type;
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GetType(&type);
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switch (aEvent->message) {
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case NS_MOUSE_LEFT_BUTTON_DOWN:
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mMouseDownOnCheckbox = PR_TRUE;
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//XXX: TODO render gray rectangle on mouse down
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break;
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case NS_MOUSE_EXIT:
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mMouseDownOnCheckbox = PR_FALSE;
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//XXX: TO DO clear gray rectangle on mouse up
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break;
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}
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}
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return(nsFormControlFrame::HandleEvent(aPresContext, aEvent, aEventStatus));
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}
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void nsCheckboxControlFrame::GetCheckboxControlFrameState(nsString& aValue)
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{
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if (nsnull != mWidget) {
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nsICheckButton* checkBox = nsnull;
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if (NS_OK == mWidget->QueryInterface(kICheckButtonIID,(void**)&checkBox)) {
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PRBool state = PR_FALSE;
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checkBox->GetState(state);
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nsFormControlHelper::GetBoolString(state, aValue);
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NS_RELEASE(checkBox);
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}
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}
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else {
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// Get the state for GFX-rendered widgets
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nsFormControlHelper::GetBoolString(mChecked, aValue);
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}
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}
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void nsCheckboxControlFrame::SetCheckboxControlFrameState(const nsString& aValue)
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{
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if (nsnull != mWidget) {
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nsICheckButton* checkBox = nsnull;
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if (NS_OK == mWidget->QueryInterface(kICheckButtonIID,(void**)&checkBox)) {
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PRBool state = nsFormControlHelper::GetBool(aValue);
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checkBox->SetState(state);
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NS_RELEASE(checkBox);
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}
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}
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else {
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// Set the state for GFX-rendered widgets
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mChecked = nsFormControlHelper::GetBool(aValue);
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nsFormControlHelper::ForceDrawFrame(this);
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}
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}
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NS_IMETHODIMP nsCheckboxControlFrame::SetProperty(nsIAtom* aName, const nsString& aValue)
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{
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if (nsHTMLAtoms::checked == aName) {
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SetCheckboxControlFrameState(aValue);
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}
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else {
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return nsFormControlFrame::SetProperty(aName, aValue);
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}
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return NS_OK;
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}
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NS_IMETHODIMP nsCheckboxControlFrame::GetProperty(nsIAtom* aName, nsString& aValue)
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{
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// Return the value of the property from the widget it is not null.
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// If is null, assume the widget is GFX-rendered and return a member variable instead.
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if (nsHTMLAtoms::checked == aName) {
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GetCheckboxControlFrameState(aValue);
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}
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else {
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return nsFormControlFrame::GetProperty(aName, aValue);
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}
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return NS_OK;
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}
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nsresult nsCheckboxControlFrame::RequiresWidget(PRBool& aRequiresWidget)
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{
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aRequiresWidget = PR_FALSE;
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return NS_OK;
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}
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