зеркало из https://github.com/mozilla/gecko-dev.git
686 строки
22 KiB
C++
686 строки
22 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
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#include "nsGfxCheckboxControlFrame.h"
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#include "nsICheckButton.h"
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#include "nsHTMLAtoms.h"
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#include "nsHTMLParts.h"
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#include "nsFormFrame.h"
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#include "nsIFormControl.h"
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#include "nsIContent.h"
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#include "nsIComponentManager.h"
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#include "nsHTMLAtoms.h"
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#include "nsINameSpaceManager.h"
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#include "nsIPresState.h"
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#include "nsCSSRendering.h"
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#include "nsIAccessibilityService.h"
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#include "nsIServiceManager.h"
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#include "nsIDOMNode.h"
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//------------------------------------------------------------
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nsresult
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NS_NewGfxCheckboxControlFrame(nsIPresShell* aPresShell, 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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nsGfxCheckboxControlFrame* it = new (aPresShell) nsGfxCheckboxControlFrame;
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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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//------------------------------------------------------------
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// Initialize GFX-rendered state
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nsGfxCheckboxControlFrame::nsGfxCheckboxControlFrame()
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: mChecked(eOff),
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mCheckButtonFaceStyle(nsnull)
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{
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}
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nsGfxCheckboxControlFrame::~nsGfxCheckboxControlFrame()
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{
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NS_IF_RELEASE(mCheckButtonFaceStyle);
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}
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//----------------------------------------------------------------------
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// nsISupports
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//----------------------------------------------------------------------
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// Frames are not refcounted, no need to AddRef
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NS_IMETHODIMP
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nsGfxCheckboxControlFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
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{
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NS_ASSERTION(aInstancePtr, "QueryInterface requires a non-NULL destination!");
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if ( !aInstancePtr )
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return NS_ERROR_NULL_POINTER;
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if (aIID.Equals(NS_GET_IID(nsIStatefulFrame))) {
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*aInstancePtr = (void*)(nsIStatefulFrame*) this;
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return NS_OK;
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}
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if (aIID.Equals(NS_GET_IID(nsICheckboxControlFrame))) {
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*aInstancePtr = (void*) ((nsICheckboxControlFrame*) this);
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return NS_OK;
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}
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return nsFormControlFrame::QueryInterface(aIID, aInstancePtr);
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}
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NS_IMETHODIMP nsGfxCheckboxControlFrame::GetAccessible(nsIAccessible** aAccessible)
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{
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nsCOMPtr<nsIAccessibilityService> accService = do_GetService("@mozilla.org/accessibilityService;1");
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if (accService) {
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nsIAccessible* acc = nsnull;
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return accService->CreateHTMLCheckboxAccessible(NS_STATIC_CAST(nsIFrame*, this), aAccessible);
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}
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return NS_ERROR_FAILURE;
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}
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//--------------------------------------------------------------
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NS_IMETHODIMP
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nsGfxCheckboxControlFrame::SetCheckboxFaceStyleContext(nsIStyleContext *aCheckboxFaceStyleContext)
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{
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mCheckButtonFaceStyle = aCheckboxFaceStyleContext;
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NS_ADDREF(mCheckButtonFaceStyle);
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return NS_OK;
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}
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//------------------------------------------------------------
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//
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// Init
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//
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// We need to override this in order to see if we're a tristate checkbox.
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//
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NS_IMETHODIMP
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nsGfxCheckboxControlFrame::Init(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIFrame* aParent,
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nsIStyleContext* aContext,
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nsIFrame* aPrevInFlow)
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{
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nsFormControlFrame::Init ( aPresContext, aContent, aParent, aContext, aPrevInFlow );
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// figure out if we're a tristate at the start. This may change later on once
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// we've been running for a while, so more code is in AttributeChanged() to pick
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// that up. Regardless, we need this check when initializing.
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nsAutoString value;
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nsresult res = mContent->GetAttribute ( kNameSpaceID_None, GetTristateAtom(), value );
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if ( res == NS_CONTENT_ATTR_HAS_VALUE )
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mIsTristate = PR_TRUE;
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// give the attribute a default value so it's always present, if we're a tristate
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if ( IsTristateCheckbox() )
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mContent->SetAttribute ( kNameSpaceID_None, GetTristateValueAtom(), NS_ConvertASCIItoUCS2("0"), PR_FALSE );
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return NS_OK;
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}
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//--------------------------------------------------------------
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NS_IMETHODIMP
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nsGfxCheckboxControlFrame::GetAdditionalStyleContext(PRInt32 aIndex,
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nsIStyleContext** aStyleContext) const
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{
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NS_PRECONDITION(nsnull != aStyleContext, "null OUT parameter pointer");
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if (aIndex < 0) {
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return NS_ERROR_INVALID_ARG;
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}
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*aStyleContext = nsnull;
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switch (aIndex) {
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case NS_GFX_CHECKBOX_CONTROL_FRAME_FACE_CONTEXT_INDEX:
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*aStyleContext = mCheckButtonFaceStyle;
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NS_IF_ADDREF(*aStyleContext);
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break;
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default:
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return NS_ERROR_INVALID_ARG;
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}
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return NS_OK;
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}
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//--------------------------------------------------------------
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NS_IMETHODIMP
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nsGfxCheckboxControlFrame::SetAdditionalStyleContext(PRInt32 aIndex,
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nsIStyleContext* aStyleContext)
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{
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if (aIndex < 0) {
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return NS_ERROR_INVALID_ARG;
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}
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switch (aIndex) {
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case NS_GFX_CHECKBOX_CONTROL_FRAME_FACE_CONTEXT_INDEX:
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NS_IF_RELEASE(mCheckButtonFaceStyle);
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mCheckButtonFaceStyle = aStyleContext;
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NS_IF_ADDREF(aStyleContext);
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break;
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}
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return NS_OK;
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}
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//------------------------------------------------------------
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//
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// GetTristateAtom [static]
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//
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// Use a lazily instantiated static initialization scheme to create an atom that
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// represents the attribute set when this should be a tri-state checkbox.
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//
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// Does NOT addref!
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//
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nsIAtom*
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nsGfxCheckboxControlFrame :: GetTristateAtom ( )
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{
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return nsHTMLAtoms::moz_tristate;
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}
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//------------------------------------------------------------
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//
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// GetTristateValueAtom [static]
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//
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// Use a lazily instantiated static initialization scheme to create an atom that
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// represents the attribute that holds the value when the button is a tri-state (since
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// we can't use "checked").
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//
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// Does NOT addref!
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//
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nsIAtom*
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nsGfxCheckboxControlFrame :: GetTristateValueAtom ( )
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{
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return nsHTMLAtoms::moz_tristatevalue;
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}
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//------------------------------------------------------------
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//
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// AttributeChanged
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//
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// Override to check for the attribute that determines if we're a normal or a
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// tristate checkbox. If we notice a switch from one to the other, we need
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// to adjust the proper attributes in the content model accordingly.
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//
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// Also, since the value of a tri-state is kept in a separate attribute (we
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// can't use "checked" because it's a boolean), we have to notice it changing
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// here.
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//
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NS_IMETHODIMP
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nsGfxCheckboxControlFrame::AttributeChanged(nsIPresContext* aPresContext,
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nsIContent* aChild,
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PRInt32 aNameSpaceID,
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nsIAtom* aAttribute,
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PRInt32 aHint)
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{
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if ( aAttribute == GetTristateAtom() ) {
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nsAutoString value;
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nsresult res = mContent->GetAttribute ( kNameSpaceID_None, GetTristateAtom(), value );
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PRBool isNowTristate = (res == NS_CONTENT_ATTR_HAS_VALUE);
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if ( isNowTristate != mIsTristate )
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SwitchModesWithEmergencyBrake(aPresContext, isNowTristate);
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}
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else if ( aAttribute == GetTristateValueAtom() ) {
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// ignore this change if we're not a tri-state checkbox
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if ( IsTristateCheckbox() ) {
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nsAutoString value;
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nsresult res = mContent->GetAttribute ( kNameSpaceID_None, GetTristateValueAtom(), value );
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if ( res == NS_CONTENT_ATTR_HAS_VALUE )
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SetCheckboxControlFrameState(aPresContext, value);
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}
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}
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else
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return nsFormControlFrame::AttributeChanged(aPresContext, aChild, aNameSpaceID, aAttribute, aHint);
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return NS_OK;
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}
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//------------------------------------------------------------
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//
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// InitializeControl
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//
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// Set the default checked state of the checkbox.
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//
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void
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nsGfxCheckboxControlFrame::InitializeControl(nsIPresContext* aPresContext)
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{
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nsFormControlFrame::InitializeControl(aPresContext);
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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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SetCheckboxState (aPresContext, checked ? eOn : eOff );
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}
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}
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//------------------------------------------------------------
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void
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nsGfxCheckboxControlFrame::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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nsMargin borderPadding(0,0,0,0);
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CalcBorderPadding(borderPadding);
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nsRect checkRect(0,0, mRect.width, mRect.height);
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checkRect.Deflate(borderPadding);
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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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if ( IsTristateCheckbox() ) {
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// Get current checked state through content model.
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// XXX this won't work under printing. does that matter???
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CheckState checked = GetCheckboxState();
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switch ( checked ) {
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case eOn:
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nsFormControlHelper::PaintCheckMark(aRenderingContext, p2t, checkRect);
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break;
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case eMixed:
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PaintMixedMark(aRenderingContext, p2t, checkRect);
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break;
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// no special drawing otherwise
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default:
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break;
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} // case of value of checkbox
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} else {
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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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PRBool checked = PR_FALSE;
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GetCurrentCheckState(&checked);
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if ( checked ) {
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nsFormControlHelper::PaintCheckMark(aRenderingContext, p2t, checkRect);
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}
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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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//------------------------------------------------------------
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//
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// PaintMixedMark
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//
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// Like nsFormControlHelper::PaintCheckMark(), but paints the horizontal "mixed"
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// bar inside the box. Only used for tri-state checkboxes.
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//
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void
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nsGfxCheckboxControlFrame::PaintMixedMark ( nsIRenderingContext& aRenderingContext,
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float aPixelsToTwips, const nsRect& aRect)
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{
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const PRUint32 checkpoints = 4;
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const PRUint32 checksize = 6; //This is value is determined by added 2 units to the end
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//of the 7X& pixel rectangle below to provide some white space
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//around the checkmark when it is rendered.
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// Points come from the coordinates on a 7X7 pixels
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// box with 0,0 at the lower left.
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nscoord checkedPolygonDef[] = { 1,2, 5,2, 5,4, 1,4 };
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// Location of the center point of the checkmark
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const PRUint32 centerx = 3;
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const PRUint32 centery = 3;
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nsPoint checkedPolygon[checkpoints];
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PRUint32 defIndex = 0;
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PRUint32 polyIndex = 0;
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// Scale the checkmark based on the smallest dimension
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PRUint32 size = aRect.width / checksize;
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if (aRect.height < aRect.width)
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size = aRect.height / checksize;
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// Center and offset each point in the polygon definition.
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for (defIndex = 0; defIndex < (checkpoints * 2); defIndex++) {
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checkedPolygon[polyIndex].x = nscoord((((checkedPolygonDef[defIndex]) - centerx) * (size)) + (aRect.width / 2) + aRect.x);
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defIndex++;
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checkedPolygon[polyIndex].y = nscoord((((checkedPolygonDef[defIndex]) - centery) * (size)) + (aRect.height / 2) + aRect.y);
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polyIndex++;
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}
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aRenderingContext.FillPolygon(checkedPolygon, checkpoints);
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} // PaintMixedMark
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//------------------------------------------------------------
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NS_METHOD
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nsGfxCheckboxControlFrame::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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PRBool isVisible;
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if (NS_SUCCEEDED(IsVisibleForPainting(aPresContext, aRenderingContext, PR_TRUE, &isVisible)) && !isVisible) {
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return NS_OK;
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}
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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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PRBool doDefaultPainting = PR_TRUE;
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// Paint the checkmark
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if (nsnull != mCheckButtonFaceStyle && GetCheckboxState() == eOn) {
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const nsStyleBackground* myColor = (const nsStyleBackground*)
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mCheckButtonFaceStyle->GetStyleData(eStyleStruct_Background);
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if (myColor->mBackgroundImage.Length() > 0) {
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const nsStyleBorder* myBorder = (const nsStyleBorder*)
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mCheckButtonFaceStyle->GetStyleData(eStyleStruct_Border);
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const nsStylePosition* myPosition = (const nsStylePosition*)
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mCheckButtonFaceStyle->GetStyleData(eStyleStruct_Position);
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nscoord width = myPosition->mWidth.GetCoordValue();
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nscoord height = myPosition->mHeight.GetCoordValue();
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// Position the button centered within the radio control's rectangle.
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nscoord x = (mRect.width - width) / 2;
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nscoord y = (mRect.height - height) / 2;
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nsRect rect(x, y, width, height);
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nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
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aDirtyRect, rect, *myColor, *myBorder, 0, 0);
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nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
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aDirtyRect, rect, *myBorder, mCheckButtonFaceStyle, 0);
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doDefaultPainting = PR_FALSE;
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}
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}
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if (doDefaultPainting) {
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PaintCheckBox(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
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}
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}
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// Call to the base class to draw selection borders when appropriate
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return nsFrame::Paint(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
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}
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//------------------------------------------------------------
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nsGfxCheckboxControlFrame::CheckState
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nsGfxCheckboxControlFrame::GetCheckboxState ( )
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{
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return mChecked;
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}
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//------------------------------------------------------------
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void
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nsGfxCheckboxControlFrame::SetCheckboxState (nsIPresContext* aPresContext,
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nsGfxCheckboxControlFrame::CheckState aValue )
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{
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mChecked = aValue;
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nsFormControlHelper::ForceDrawFrame(aPresContext, this);
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}
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//------------------------------------------------------------
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void nsGfxCheckboxControlFrame::GetCheckboxControlFrameState(nsAWritableString& aValue)
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{
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CheckStateToString(GetCheckboxState(), aValue);
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}
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//------------------------------------------------------------
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void nsGfxCheckboxControlFrame::SetCheckboxControlFrameState(nsIPresContext* aPresContext,
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const nsAReadableString& aValue)
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{
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CheckState state = StringToCheckState(aValue);
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SetCheckboxState(aPresContext, state);
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}
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//------------------------------------------------------------
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NS_IMETHODIMP nsGfxCheckboxControlFrame::SetProperty(nsIPresContext* aPresContext,
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nsIAtom* aName,
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const nsAReadableString& aValue)
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{
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if (nsHTMLAtoms::checked == aName)
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SetCheckboxControlFrameState(aPresContext, aValue);
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else
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return nsFormControlFrame::SetProperty(aPresContext, aName, aValue);
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return NS_OK;
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}
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//------------------------------------------------------------
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NS_IMETHODIMP nsGfxCheckboxControlFrame::GetProperty(nsIAtom* aName, nsAWritableString& aValue)
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{
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if (nsHTMLAtoms::checked == aName)
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GetCheckboxControlFrameState(aValue);
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else
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return nsFormControlFrame::GetProperty(aName, aValue);
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return NS_OK;
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}
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//------------------------------------------------------------
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PRInt32
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nsGfxCheckboxControlFrame::GetMaxNumValues()
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{
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return 1;
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}
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//------------------------------------------------------------
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PRBool
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nsGfxCheckboxControlFrame::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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CheckState state = GetCheckboxState();
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nsAutoString value;
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nsresult valueResult = GetValue(&value);
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if (eOn != 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].AssignWithConversion("on");
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} else {
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aValues[0] = value;
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}
|
|
aNames[0] = name;
|
|
aNumValues = 1;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
//------------------------------------------------------------
|
|
void
|
|
nsGfxCheckboxControlFrame::Reset(nsIPresContext* aPresContext)
|
|
{
|
|
PRBool checked;
|
|
GetDefaultCheckState(&checked);
|
|
SetCheckboxState (aPresContext, checked ? eOn : eOff );
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------
|
|
//
|
|
// CheckStateToString
|
|
//
|
|
// Converts from a CheckState to a string
|
|
//
|
|
void
|
|
nsGfxCheckboxControlFrame::CheckStateToString ( CheckState inState, nsAWritableString& outStateAsString )
|
|
{
|
|
switch ( inState ) {
|
|
case eOn:
|
|
outStateAsString.Assign(NS_STRING_TRUE);
|
|
break;
|
|
|
|
case eOff:
|
|
outStateAsString.Assign(NS_STRING_FALSE);
|
|
break;
|
|
|
|
case eMixed:
|
|
outStateAsString.Assign(NS_LITERAL_STRING("2"));
|
|
break;
|
|
}
|
|
} // CheckStateToString
|
|
|
|
|
|
//------------------------------------------------------------
|
|
//
|
|
// StringToCheckState
|
|
//
|
|
// Converts from a string to a CheckState enum
|
|
//
|
|
nsGfxCheckboxControlFrame::CheckState
|
|
nsGfxCheckboxControlFrame::StringToCheckState ( const nsAReadableString & aStateAsString )
|
|
{
|
|
if ( aStateAsString.Equals(NS_STRING_TRUE) )
|
|
return eOn;
|
|
else if ( aStateAsString.Equals(NS_STRING_FALSE) )
|
|
return eOff;
|
|
|
|
// not true and not false means mixed
|
|
return eMixed;
|
|
|
|
} // StringToCheckState
|
|
|
|
|
|
//------------------------------------------------------------
|
|
//
|
|
// SwitchModesWithEmergencyBrake
|
|
//
|
|
// Since we use an attribute to decide if we're a tristate box or not, this can change
|
|
// at any time. Since we have to use separate attributes to store the values depending
|
|
// on the mode, we have to convert from one to the other.
|
|
//
|
|
void
|
|
nsGfxCheckboxControlFrame::SwitchModesWithEmergencyBrake ( nsIPresContext* aPresContext,
|
|
PRBool inIsNowTristate )
|
|
{
|
|
if ( inIsNowTristate ) {
|
|
// we were a normal checkbox, and now we're a tristate. That means that the
|
|
// state of the checkbox was in "checked" and needs to be copied over into
|
|
// our parallel attribute.
|
|
nsAutoString value;
|
|
CheckStateToString ( GetCheckboxState(), value );
|
|
mContent->SetAttribute ( kNameSpaceID_None, GetTristateValueAtom(), value, PR_FALSE );
|
|
}
|
|
else {
|
|
// we were a tri-state checkbox, and now we're a normal checkbox. The current
|
|
// state is already up to date (because it's always up to date). We just have
|
|
// to make sure it's not mixed. If it is, just set it to checked. Remove our
|
|
// parallel attribute so that we're nice and HTML4 compliant.
|
|
if ( GetCheckboxState() == eMixed )
|
|
SetCheckboxState(aPresContext, eOn);
|
|
mContent->UnsetAttribute ( kNameSpaceID_None, GetTristateValueAtom(), PR_FALSE );
|
|
}
|
|
|
|
// switch!
|
|
mIsTristate = inIsNowTristate;
|
|
|
|
} // SwitchModesWithEmergencyBrake
|
|
|
|
//----------------------------------------------------------------------
|
|
// nsIStatefulFrame
|
|
//----------------------------------------------------------------------
|
|
NS_IMETHODIMP nsGfxCheckboxControlFrame::SaveState(nsIPresContext* aPresContext,
|
|
nsIPresState** aState)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aState);
|
|
|
|
// Don't save state before we are initialized
|
|
if (!mDidInit) {
|
|
return NS_OK;
|
|
}
|
|
|
|
CheckState stateCheck = GetCheckboxState();
|
|
PRBool defaultStateBool = PR_FALSE;
|
|
nsresult res = GetDefaultCheckState(&defaultStateBool);
|
|
|
|
// Compare to default value, and only save if needed (Bug 62713)
|
|
// eOn/eOff comparisons used to handle 'mixed' state (alway save)
|
|
if (!(NS_CONTENT_ATTR_HAS_VALUE == res &&
|
|
((eOn == stateCheck && defaultStateBool) ||
|
|
(eOff == stateCheck && !defaultStateBool)))) {
|
|
|
|
// Get the value string
|
|
nsAutoString stateString;
|
|
CheckStateToString(stateCheck, stateString);
|
|
|
|
// Construct a pres state and store value in it.
|
|
res = NS_NewPresState(aState);
|
|
NS_ENSURE_SUCCESS(res, res);
|
|
res = (*aState)->SetStateProperty(NS_LITERAL_STRING("checked"), stateString);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
NS_IMETHODIMP nsGfxCheckboxControlFrame::RestoreState(nsIPresContext* aPresContext,
|
|
nsIPresState* aState)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aState);
|
|
|
|
if (!mDidInit) {
|
|
mPresContext = aPresContext;
|
|
InitializeControl(aPresContext);
|
|
mDidInit = PR_TRUE;
|
|
}
|
|
|
|
// Set the value to the stored state.
|
|
nsAutoString stateString;
|
|
nsresult res = aState->GetStateProperty(NS_LITERAL_STRING("checked"), stateString);
|
|
NS_ENSURE_SUCCESS(res, res);
|
|
|
|
SetCheckboxControlFrameState(aPresContext, stateString);
|
|
return NS_OK;
|
|
}
|
|
|
|
//------------------------------------------------------------
|
|
// Extra Debug Methods
|
|
//------------------------------------------------------------
|
|
#ifdef DEBUG_rodsXXX
|
|
NS_IMETHODIMP
|
|
nsGfxCheckboxControlFrame::Reflow(nsIPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
DO_GLOBAL_REFLOW_COUNT("nsGfxCheckboxControlFrame", aReflowState.reason);
|
|
nsresult rv = nsFormControlFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus);
|
|
|
|
COMPARE_QUIRK_SIZE("nsGfxCheckboxControlFrame", 13, 13)
|
|
return rv;
|
|
}
|
|
#endif
|