mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-13 18:27:35 +00:00
135 lines
3.5 KiB
C++
135 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* The contents of this file are subject to the Netscape Public
|
|
* License Version 1.1 (the "License"); you may not use this file
|
|
* except in compliance with the License. You may obtain a copy of
|
|
* the License at http://www.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS
|
|
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
|
|
* implied. See the License for the specific language governing
|
|
* rights and limitations under the License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is Netscape
|
|
* Communications Corporation. Portions created by Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All
|
|
* Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*/
|
|
|
|
|
|
#include "CKeyScrollAttachment.h"
|
|
|
|
|
|
CKeyScrollAttachment::CKeyScrollAttachment(LStream* inStream)
|
|
: LAttachment(inStream)
|
|
{
|
|
mViewToScroll = dynamic_cast<LView*>(GetOwnerHost());
|
|
ThrowIfNULL_(mViewToScroll);
|
|
|
|
Assert_(mMessage == msg_KeyPress);
|
|
}
|
|
|
|
|
|
void
|
|
CKeyScrollAttachment::ExecuteSelf(
|
|
MessageT /* inMessage */,
|
|
void *ioParam)
|
|
{
|
|
mExecuteHost = false; // We handle navigation keys
|
|
Int16 theKey = ((EventRecord*) ioParam)->message & charCodeMask;
|
|
|
|
switch (theKey)
|
|
{
|
|
case char_Home: // Scroll to top left
|
|
mViewToScroll->ScrollImageTo(0, 0, true);
|
|
break;
|
|
|
|
case char_End:
|
|
{ // Scroll to bottom right
|
|
SDimension16 frameSize;
|
|
SDimension32 imageSize;
|
|
mViewToScroll->GetFrameSize(frameSize);
|
|
mViewToScroll->GetImageSize(imageSize);
|
|
// Obviously we don't want to scroll a small image to the bottom of
|
|
// the frame...
|
|
SInt16 deltaV = imageSize.height - frameSize.height;
|
|
if (deltaV < 0)
|
|
deltaV = 0;
|
|
SInt16 deltaH = imageSize.width - frameSize.width;
|
|
if (deltaH < 0)
|
|
deltaH = 0;
|
|
if (deltaV || deltaH)
|
|
mViewToScroll->ScrollImageTo(deltaH, deltaV, true);
|
|
}
|
|
break;
|
|
|
|
case char_PageUp:
|
|
{ // Scroll up by height of Frame,
|
|
// but not past top of Image
|
|
SPoint32 frameLoc;
|
|
SPoint32 imageLoc;
|
|
mViewToScroll->GetFrameLocation(frameLoc);
|
|
mViewToScroll->GetImageLocation(imageLoc);
|
|
|
|
Int32 upMax = frameLoc.v - imageLoc.v;
|
|
if (upMax > 0)
|
|
{
|
|
SPoint32 scrollUnit;
|
|
SDimension16 frameSize;
|
|
mViewToScroll->GetScrollUnit(scrollUnit);
|
|
mViewToScroll->GetFrameSize(frameSize);
|
|
|
|
Int32 up = (frameSize.height - 1) / scrollUnit.v;
|
|
if (up <= 0)
|
|
up = 1;
|
|
|
|
up *= scrollUnit.v;
|
|
if (up > upMax)
|
|
up = upMax;
|
|
|
|
mViewToScroll->ScrollImageBy(0, -up, true);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case char_PageDown:
|
|
{ // Scroll down by height of Frame,
|
|
// but not past bottom of Image
|
|
SPoint32 frameLoc;
|
|
SPoint32 imageLoc;
|
|
SDimension16 frameSize;
|
|
SDimension32 imageSize;
|
|
mViewToScroll->GetFrameLocation(frameLoc);
|
|
mViewToScroll->GetImageLocation(imageLoc);
|
|
mViewToScroll->GetFrameSize(frameSize);
|
|
mViewToScroll->GetImageSize(imageSize);
|
|
|
|
Int32 downMax = imageSize.height - frameSize.height -
|
|
(frameLoc.v - imageLoc.v);
|
|
if (downMax > 0) {
|
|
SPoint32 scrollUnit;
|
|
mViewToScroll->GetScrollUnit(scrollUnit);
|
|
|
|
Int32 down = (frameSize.height - 1) / scrollUnit.v;
|
|
if (down <= 0) {
|
|
down = 1;
|
|
}
|
|
down *= scrollUnit.v;
|
|
if (down > downMax) {
|
|
down = downMax;
|
|
}
|
|
mViewToScroll->ScrollImageBy(0, down, true);
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
mExecuteHost = true; // Some other key, let host respond
|
|
break;
|
|
}
|
|
}
|