michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /* derived class of nsBlockFrame used for xul:label elements */
michael@0: 
michael@0: #include "mozilla/EventStateManager.h"
michael@0: #include "nsXULLabelFrame.h"
michael@0: #include "nsHTMLParts.h"
michael@0: #include "nsNameSpaceManager.h"
michael@0: 
michael@0: using namespace mozilla;
michael@0: 
michael@0: nsIFrame*
michael@0: NS_NewXULLabelFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
michael@0: {
michael@0:   nsXULLabelFrame* it = new (aPresShell) nsXULLabelFrame(aContext);
michael@0:   
michael@0:   it->SetFlags(NS_BLOCK_FLOAT_MGR | NS_BLOCK_MARGIN_ROOT);
michael@0: 
michael@0:   return it;
michael@0: }
michael@0: 
michael@0: NS_IMPL_FRAMEARENA_HELPERS(nsXULLabelFrame)
michael@0: 
michael@0: // If you make changes to this function, check its counterparts 
michael@0: // in nsBoxFrame and nsTextBoxFrame
michael@0: nsresult
michael@0: nsXULLabelFrame::RegUnregAccessKey(bool aDoReg)
michael@0: {
michael@0:   // if we have no content, we can't do anything
michael@0:   if (!mContent)
michael@0:     return NS_ERROR_FAILURE;
michael@0: 
michael@0:   // To filter out <label>s without a control attribute.
michael@0:   // XXXjag a side-effect is that we filter out anonymous <label>s
michael@0:   // in e.g. <menu>, <menuitem>, <button>. These <label>s inherit
michael@0:   // |accesskey| and would otherwise register themselves, overwriting
michael@0:   // the content we really meant to be registered.
michael@0:   if (!mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::control))
michael@0:     return NS_OK;
michael@0: 
michael@0:   nsAutoString accessKey;
michael@0:   mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::accesskey, accessKey);
michael@0: 
michael@0:   if (accessKey.IsEmpty())
michael@0:     return NS_OK;
michael@0: 
michael@0:   // With a valid PresContext we can get the ESM 
michael@0:   // and register the access key
michael@0:   EventStateManager* esm = PresContext()->EventStateManager();
michael@0: 
michael@0:   uint32_t key = accessKey.First();
michael@0:   if (aDoReg)
michael@0:     esm->RegisterAccessKey(mContent, key);
michael@0:   else
michael@0:     esm->UnregisterAccessKey(mContent, key);
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: /////////////////////////////////////////////////////////////////////////////
michael@0: // nsIFrame
michael@0: 
michael@0: void
michael@0: nsXULLabelFrame::Init(nsIContent*      aContent,
michael@0:                       nsIFrame*        aParent,
michael@0:                       nsIFrame*        aPrevInFlow)
michael@0: {
michael@0:   nsBlockFrame::Init(aContent, aParent, aPrevInFlow);
michael@0: 
michael@0:   // register access key
michael@0:   RegUnregAccessKey(true);
michael@0: }
michael@0: 
michael@0: void
michael@0: nsXULLabelFrame::DestroyFrom(nsIFrame* aDestructRoot)
michael@0: {
michael@0:   // unregister access key
michael@0:   RegUnregAccessKey(false);
michael@0:   nsBlockFrame::DestroyFrom(aDestructRoot);
michael@0: } 
michael@0: 
michael@0: nsresult
michael@0: nsXULLabelFrame::AttributeChanged(int32_t aNameSpaceID,
michael@0:                                   nsIAtom* aAttribute,
michael@0:                                   int32_t aModType)
michael@0: {
michael@0:   nsresult rv = nsBlockFrame::AttributeChanged(aNameSpaceID, 
michael@0:                                                aAttribute, aModType);
michael@0: 
michael@0:   // If the accesskey changed, register for the new value
michael@0:   // The old value has been unregistered in nsXULElement::SetAttr
michael@0:   if (aAttribute == nsGkAtoms::accesskey || aAttribute == nsGkAtoms::control)
michael@0:     RegUnregAccessKey(true);
michael@0: 
michael@0:   return rv;
michael@0: }
michael@0: 
michael@0: nsIAtom*
michael@0: nsXULLabelFrame::GetType() const
michael@0: {
michael@0:   return nsGkAtoms::XULLabelFrame;
michael@0: }
michael@0: 
michael@0: /////////////////////////////////////////////////////////////////////////////
michael@0: // Diagnostics
michael@0: 
michael@0: #ifdef DEBUG_FRAME_DUMP
michael@0: nsresult
michael@0: nsXULLabelFrame::GetFrameName(nsAString& aResult) const
michael@0: {
michael@0:   return MakeFrameName(NS_LITERAL_STRING("XULLabel"), aResult);
michael@0: }
michael@0: #endif