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335 lines
10 KiB
C++
335 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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//
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// Eric Vaughan
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// Netscape Communications
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//
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// See documentation in associated header file
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//
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#include "nsScrollbarButtonFrame.h"
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#include "nsPresContext.h"
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#include "nsIContent.h"
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#include "nsCOMPtr.h"
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#include "nsUnitConversion.h"
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#include "nsINameSpaceManager.h"
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#include "nsGkAtoms.h"
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#include "nsSliderFrame.h"
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#include "nsIScrollbarFrame.h"
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#include "nsIScrollbarMediator.h"
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#include "nsRepeatService.h"
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#include "nsGUIEvent.h"
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#include "nsILookAndFeel.h"
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//
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// NS_NewToolbarFrame
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//
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// Creates a new Toolbar frame and returns it
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//
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nsIFrame*
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NS_NewScrollbarButtonFrame (nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsScrollbarButtonFrame(aPresShell, aContext);
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} // NS_NewScrollBarButtonFrame
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NS_IMETHODIMP
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nsScrollbarButtonFrame::QueryInterface(REFNSIID aIID, void** aInstancePtr)
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{
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NS_PRECONDITION(aInstancePtr, "null out param");
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if (aIID.Equals(NS_GET_IID(nsITimerCallback))) {
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*aInstancePtr = static_cast<nsITimerCallback*>(this);
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return NS_OK;
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}
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return nsButtonBoxFrame::QueryInterface(aIID, aInstancePtr);
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}
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NS_IMETHODIMP
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nsScrollbarButtonFrame::HandleEvent(nsPresContext* aPresContext,
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nsGUIEvent* aEvent,
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nsEventStatus* aEventStatus)
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{
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// XXX hack until handle release is actually called in nsframe.
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if (aEvent->message == NS_MOUSE_EXIT_SYNTH ||
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aEvent->message == NS_MOUSE_BUTTON_UP)
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HandleRelease(aPresContext, aEvent, aEventStatus);
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// if we didn't handle the press ourselves, pass it on to the superclass
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if (!HandleButtonPress(aPresContext, aEvent, aEventStatus))
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return nsButtonBoxFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
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return NS_OK;
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}
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PRBool
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nsScrollbarButtonFrame::HandleButtonPress(nsPresContext* aPresContext,
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nsGUIEvent* aEvent,
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nsEventStatus* aEventStatus)
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{
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// Get the desired action for the scrollbar button.
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nsILookAndFeel::nsMetricID tmpAction;
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if (aEvent->eventStructType == NS_MOUSE_EVENT &&
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aEvent->message == NS_MOUSE_BUTTON_DOWN) {
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PRUint16 button = static_cast<nsMouseEvent*>(aEvent)->button;
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if (button == nsMouseEvent::eLeftButton) {
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tmpAction = nsILookAndFeel::eMetric_ScrollButtonLeftMouseButtonAction;
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} else if (button == nsMouseEvent::eMiddleButton) {
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tmpAction = nsILookAndFeel::eMetric_ScrollButtonMiddleMouseButtonAction;
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} else if (button == nsMouseEvent::eRightButton) {
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tmpAction = nsILookAndFeel::eMetric_ScrollButtonRightMouseButtonAction;
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} else {
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return PR_FALSE;
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}
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} else {
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return PR_FALSE;
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}
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// Get the button action metric from the pres. shell.
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PRInt32 pressedButtonAction;
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if (NS_FAILED(aPresContext->LookAndFeel()->GetMetric(tmpAction,
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pressedButtonAction)))
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return PR_FALSE;
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// get the scrollbar control
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nsIFrame* scrollbar;
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GetParentWithTag(nsGkAtoms::scrollbar, this, scrollbar);
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if (scrollbar == nsnull)
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return PR_FALSE;
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// get the scrollbars content node
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nsIContent* content = scrollbar->GetContent();
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static nsIContent::AttrValuesArray strings[] = { &nsGkAtoms::increment,
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&nsGkAtoms::decrement,
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nsnull };
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PRInt32 index = mContent->FindAttrValueIn(kNameSpaceID_None,
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nsGkAtoms::type,
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strings, eCaseMatters);
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PRInt32 direction;
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if (index == 0)
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direction = 1;
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else if (index == 1)
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direction = -1;
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else
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return PR_FALSE;
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// Whether or not to repeat the click action.
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PRBool repeat = PR_TRUE;
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// Use smooth scrolling by default.
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PRBool smoothScroll = PR_TRUE;
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switch (pressedButtonAction) {
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case 0:
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mIncrement = direction * nsSliderFrame::GetIncrement(content);
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break;
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case 1:
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mIncrement = direction * nsSliderFrame::GetPageIncrement(content);
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break;
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case 2:
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if (direction == -1)
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mIncrement = -nsSliderFrame::GetCurrentPosition(content);
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else
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mIncrement = nsSliderFrame::GetMaxPosition(content) -
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nsSliderFrame::GetCurrentPosition(content);
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// Don't repeat or use smooth scrolling if scrolling to beginning or end
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// of a page.
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repeat = smoothScroll = PR_FALSE;
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break;
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case 3:
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default:
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// We were told to ignore this click, or someone assigned a non-standard
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// value to the button's action.
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return PR_FALSE;
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}
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// set this attribute so we can style it later
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nsWeakFrame weakFrame(this);
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mContent->SetAttr(kNameSpaceID_None, nsGkAtoms::active, NS_LITERAL_STRING("true"), PR_TRUE);
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if (weakFrame.IsAlive()) {
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DoButtonAction(smoothScroll);
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}
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if (repeat)
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nsRepeatService::GetInstance()->Start(this);
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return PR_TRUE;
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}
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NS_IMETHODIMP
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nsScrollbarButtonFrame::HandleRelease(nsPresContext* aPresContext,
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nsGUIEvent* aEvent,
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nsEventStatus* aEventStatus)
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{
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// we're not active anymore
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mContent->UnsetAttr(kNameSpaceID_None, nsGkAtoms::active, PR_TRUE);
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nsRepeatService::GetInstance()->Stop();
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return NS_OK;
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}
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NS_IMETHODIMP nsScrollbarButtonFrame::Notify(nsITimer *timer)
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{
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// Since this is only going to get called if we're scrolling a page length
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// or a line increment, we will always use smooth scrolling.
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DoButtonAction(PR_TRUE);
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return NS_OK;
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}
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void
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nsScrollbarButtonFrame::MouseClicked(nsPresContext* aPresContext, nsGUIEvent* aEvent)
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{
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nsButtonBoxFrame::MouseClicked(aPresContext, aEvent);
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//MouseClicked();
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}
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void
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nsScrollbarButtonFrame::DoButtonAction(PRBool aSmoothScroll)
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{
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// get the scrollbar control
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nsIFrame* scrollbar;
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GetParentWithTag(nsGkAtoms::scrollbar, this, scrollbar);
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if (scrollbar == nsnull)
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return;
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// get the scrollbars content node
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nsCOMPtr<nsIContent> content = scrollbar->GetContent();
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// get the current pos
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PRInt32 curpos = nsSliderFrame::GetCurrentPosition(content);
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PRInt32 oldpos = curpos;
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// get the max pos
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PRInt32 maxpos = nsSliderFrame::GetMaxPosition(content);
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// increment the given amount
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if (mIncrement)
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curpos += mIncrement;
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// make sure the current position is between the current and max positions
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if (curpos < 0)
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curpos = 0;
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else if (curpos > maxpos)
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curpos = maxpos;
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nsIScrollbarFrame* sb;
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CallQueryInterface(scrollbar, &sb);
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if (sb) {
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nsIScrollbarMediator* m = sb->GetScrollbarMediator();
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if (m) {
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m->ScrollbarButtonPressed(sb, oldpos, curpos);
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return;
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}
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}
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// set the current position of the slider.
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nsAutoString curposStr;
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curposStr.AppendInt(curpos);
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if (aSmoothScroll)
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content->SetAttr(kNameSpaceID_None, nsGkAtoms::smooth, NS_LITERAL_STRING("true"), PR_FALSE);
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content->SetAttr(kNameSpaceID_None, nsGkAtoms::curpos, curposStr, PR_TRUE);
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if (aSmoothScroll)
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content->UnsetAttr(kNameSpaceID_None, nsGkAtoms::smooth, PR_FALSE);
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}
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nsresult
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nsScrollbarButtonFrame::GetChildWithTag(nsPresContext* aPresContext,
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nsIAtom* atom, nsIFrame* start,
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nsIFrame*& result)
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{
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// recursively search our children
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nsIFrame* childFrame = start->GetFirstChild(nsnull);
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while (nsnull != childFrame)
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{
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// get the content node
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nsIContent* child = childFrame->GetContent();
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if (child) {
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// see if it is the child
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if (child->Tag() == atom)
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{
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result = childFrame;
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return NS_OK;
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}
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}
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// recursive search the child
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GetChildWithTag(aPresContext, atom, childFrame, result);
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if (result != nsnull)
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return NS_OK;
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childFrame = childFrame->GetNextSibling();
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}
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result = nsnull;
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return NS_OK;
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}
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nsresult
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nsScrollbarButtonFrame::GetParentWithTag(nsIAtom* toFind, nsIFrame* start,
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nsIFrame*& result)
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{
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while (start)
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{
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start = start->GetParent();
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if (start) {
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// get the content node
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nsIContent* child = start->GetContent();
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if (child && child->Tag() == toFind) {
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result = start;
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return NS_OK;
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}
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}
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}
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result = nsnull;
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return NS_OK;
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}
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void
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nsScrollbarButtonFrame::Destroy()
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{
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// Ensure our repeat service isn't going... it's possible that a scrollbar can disappear out
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// from under you while you're in the process of scrolling.
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nsRepeatService::GetInstance()->Stop();
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nsButtonBoxFrame::Destroy();
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}
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