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af296e18b3
gecko-dev/layout/forms/nsListControlFrame.cpp
rods%netscape.com af296e18b3 Better fix for option elements with no content in them
1999-09-09 19:37:23 +00:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (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 Communicator client 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.
*/
#include "nsCOMPtr.h"
#include "nsListControlFrame.h"
#include "nsFormControlHelper.h"
#include "nsHTMLIIDs.h"
#include "nsHTMLAtoms.h"
#include "nsIHTMLContent.h"
#include "nsIFormControl.h"
#include "nsINameSpaceManager.h"
#include "nsIDeviceContext.h"
#include "nsIDOMHTMLCollection.h"
#include "nsIDOMHTMLSelectElement.h"
#include "nsIDOMHTMLOptionElement.h"
#include "nsIComboboxControlFrame.h"
#include "nsIViewManager.h"
#include "nsFormFrame.h"
#include "nsIScrollableView.h"
#include "nsIDOMHTMLOptGroupElement.h"
#include "nsWidgetsCID.h"
#include "nsIReflowCommand.h"
#include "nsIPresShell.h"
#include "nsHTMLParts.h"
#include "nsIDOMEventReceiver.h"
#include "nsIEventStateManager.h"
#include "nsIDOMUIEvent.h"
static NS_DEFINE_IID(kIDOMMouseListenerIID, NS_IDOMMOUSELISTENER_IID);
static NS_DEFINE_IID(kIDOMMouseMotionListenerIID, NS_IDOMMOUSEMOTIONLISTENER_IID);
static NS_DEFINE_IID(kIDOMKeyListenerIID, NS_IDOMKEYLISTENER_IID);
// Constants
const nscoord kMaxDropDownRows = 20; // This matches the setting for 4.x browsers
const PRInt32 kDefaultMultiselectHeight = 4; // This is compatible with 4.x browsers
const PRInt32 kNothingSelected = -1;
const PRInt32 kMaxZ = 0x7fffffff; //XXX: Shouldn't there be a define somewhere for MaxInt for PRInt32
const PRInt32 kNoSizeSpecified = -1;
//XXX: This is temporary. It simulates psuedo states by using a attribute selector on
// -moz-option-selected in the ua.css style sheet. This will not be needed when
//The event state manager is functional. KMM
const char * kMozSelected = "-moz-option-selected";
//---------------------------------------------------------
nsresult
NS_NewListControlFrame(nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsListControlFrame* it = new nsListControlFrame;
if (!it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aNewFrame = it;
return NS_OK;
}
//---------------------------------------------------------
nsListControlFrame::nsListControlFrame()
{
mHitFrame = nsnull;
mSelectedIndex = kNothingSelected;
mComboboxFrame = nsnull;
mFormFrame = nsnull;
mDisplayed = PR_FALSE;
mButtonDown = PR_FALSE;
mLastFrame = nsnull;
mMaxWidth = 0;
mMaxHeight = 0;
mPresContext = nsnull;
mEndExtendedIndex = kNothingSelected;
mStartExtendedIndex = kNothingSelected;
mIgnoreMouseUp = PR_FALSE;
mIsCapturingMouseEvents = PR_FALSE;
}
//---------------------------------------------------------
nsListControlFrame::~nsListControlFrame()
{
nsCOMPtr<nsIDOMEventReceiver> reciever(do_QueryInterface(mContent));
// we shouldn't have to unregister this listener because when
// our frame goes away all these content node go away as well
// because our frame is the only one who references them.
reciever->RemoveEventListenerByIID((nsIDOMMouseListener *)this, kIDOMMouseListenerIID);
reciever->RemoveEventListenerByIID((nsIDOMMouseMotionListener *)this, kIDOMMouseMotionListenerIID);
reciever->RemoveEventListenerByIID((nsIDOMKeyListener *)this, kIDOMKeyListenerIID);
mComboboxFrame = nsnull;
mFormFrame = nsnull;
NS_IF_RELEASE(mPresContext);
}
//---------------------------------------------------------
//NS_IMPL_ADDREF(nsListControlFrame)
//NS_IMPL_RELEASE(nsListControlFrame)
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(nsCOMTypeInfo<nsIFormControlFrame>::GetIID())) {
*aInstancePtr = (void*) ((nsIFormControlFrame*) this);
return NS_OK;
}
if (aIID.Equals(nsCOMTypeInfo<nsIListControlFrame>::GetIID())) {
*aInstancePtr = (void *)((nsIListControlFrame*)this);
return NS_OK;
}
if (aIID.Equals(nsCOMTypeInfo<nsISelectControlFrame>::GetIID())) {
*aInstancePtr = (void *)((nsISelectControlFrame*)this);
return NS_OK;
}
if (aIID.Equals(kIDOMMouseListenerIID)) {
*aInstancePtr = (void*)(nsIDOMMouseListener*) this;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kIDOMMouseMotionListenerIID)) {
*aInstancePtr = (void*)(nsIDOMMouseMotionListener*) this;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kIDOMKeyListenerIID)) {
*aInstancePtr = (void*)(nsIDOMKeyListener*) this;
NS_ADDREF_THIS();
return NS_OK;
}
return nsScrollFrame::QueryInterface(aIID, aInstancePtr);
}
//---------------------------------------------------------
// Reflow is overriden to constrain the listbox height to the number of rows and columns
// specified.
NS_IMETHODIMP
nsListControlFrame::Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
#ifdef DEBUG_rods
printf("nsListControlFrame::Reflow Reason: ");
switch (aReflowState.reason) {
case eReflowReason_Initial:printf("eReflowReason_Initial\n");break;
case eReflowReason_Incremental:printf("eReflowReason_Incremental\n");break;
case eReflowReason_Resize:printf("eReflowReason_Resize\n");break;
case eReflowReason_StyleChange:printf("eReflowReason_StyleChange\n");break;
}
#endif // DEBUG_rods
// Strategy: Let the inherited reflow happen as though the width and height of the
// ScrollFrame are big enough to allow the listbox to
// shrink to fit the longest option element line in the list.
// The desired width and height returned by the inherited reflow is returned,
// unless one of the following has been specified.
// 1. A css width has been specified.
// 2. The size has been specified.
// 3. The css height has been specified, but the number of rows has not.
// The size attribute overrides the height setting but the height setting
// should be honored if there isn't a size specified.
// Determine the desired width + height for the listbox +
/*printf("nsListControlFrame::Reflow Reason: ");
switch (aReflowState.reason) {
case eReflowReason_Initial:printf("eReflowReason_Initial\n");break;
case eReflowReason_Incremental:printf("eReflowReason_Incremental\n");break;
case eReflowReason_Resize:printf("eReflowReason_Resize\n");break;
case eReflowReason_StyleChange:printf("eReflowReason_StyleChange\n");break;
}*/
aDesiredSize.width = 0;
aDesiredSize.height = 0;
// Add the list frame as a child of the form
if (IsInDropDownMode() == PR_FALSE && !mFormFrame && (eReflowReason_Initial == aReflowState.reason)) {
nsFormFrame::AddFormControlFrame(aPresContext, *this);
}
//--Calculate a width just big enough for the scrollframe to shrink around the
//longest element in the list
nsHTMLReflowState secondPassState(aReflowState);
nsHTMLReflowState firstPassState(aReflowState);
//nsHTMLReflowState firstPassState(aPresContext, nsnull,
// this, aDesiredSize);
// Get the size of option elements inside the listbox
// Compute the width based on the longest line in the listbox.
firstPassState.mComputedWidth = NS_UNCONSTRAINEDSIZE;
firstPassState.mComputedHeight = NS_UNCONSTRAINEDSIZE;
firstPassState.availableWidth = NS_UNCONSTRAINEDSIZE;
firstPassState.availableHeight = NS_UNCONSTRAINEDSIZE;
nsSize scrolledAreaSize(0,0);
nsHTMLReflowMetrics scrolledAreaDesiredSize(&scrolledAreaSize);
if (eReflowReason_Incremental == firstPassState.reason) {
nsIFrame* targetFrame;
firstPassState.reflowCommand->GetTarget(targetFrame);
if (this == targetFrame) {
nsIReflowCommand::ReflowType type;
aReflowState.reflowCommand->GetType(type);
firstPassState.reason = eReflowReason_StyleChange;
firstPassState.reflowCommand = nsnull;
}
}
nsScrollFrame::Reflow(aPresContext,
scrolledAreaDesiredSize,
firstPassState,
aStatus);
// Compute the bounding box of the contents of the list using the area
// calculated by the first reflow as a starting point.
nscoord scrolledAreaWidth = scrolledAreaDesiredSize.maxElementSize->width;
nscoord scrolledAreaHeight = scrolledAreaDesiredSize.height;
mMaxWidth = scrolledAreaWidth;
mMaxHeight = scrolledAreaDesiredSize.maxElementSize->height;
// The first reflow produces a box with the scrollbar width and borders
// added in so we need to subtract them out.
// Retrieve the scrollbar's width and height
float sbWidth = 0.0;
float sbHeight = 0.0;;
nsCOMPtr<nsIDeviceContext> dc;
aPresContext.GetDeviceContext(getter_AddRefs(dc));
dc->GetScrollBarDimensions(sbWidth, sbHeight);
// Convert to nscoord's by rounding
nscoord scrollbarWidth = NSToCoordRound(sbWidth);
nscoord scrollbarHeight = NSToCoordRound(sbHeight);
// Subtract out the scrollbar width
scrolledAreaWidth -= scrollbarWidth;
// Subtract out the borders
nsMargin border;
if (!aReflowState.mStyleSpacing->GetBorder(border)) {
NS_NOTYETIMPLEMENTED("percentage border");
border.SizeTo(0, 0, 0, 0);
}
nsMargin padding;
if (!aReflowState.mStyleSpacing->GetPadding(padding)) {
NS_NOTYETIMPLEMENTED("percentage padding");
padding.SizeTo(0, 0, 0, 0);
}
mBorderOffsetY = border.top;
scrolledAreaWidth -= (border.left + border.right);
scrolledAreaHeight -= (border.top + border.bottom);
// Now the scrolledAreaWidth and scrolledAreaHeight are exactly
// wide and high enough to enclose their contents
PRBool isInDropDownMode = IsInDropDownMode();
nscoord visibleWidth = 0;
if (isInDropDownMode) {
// Calculate visible width for dropdown
if (NS_UNCONSTRAINEDSIZE == aReflowState.mComputedWidth) {
visibleWidth = scrolledAreaWidth;
} else {
visibleWidth = aReflowState.mComputedWidth - (border.left + border.right);
}
} else {
if (NS_UNCONSTRAINEDSIZE == aReflowState.mComputedWidth) {
visibleWidth = scrolledAreaWidth;
} else {
visibleWidth = aReflowState.mComputedWidth;
}
}
// Determine if a scrollbar will be needed, If so we need to add
// enough the width to allow for the scrollbar.
// The scrollbar will be needed under two conditions:
// (size * heightOfaRow) < scrolledAreaHeight or
// the height set through Style < scrolledAreaHeight.
// Calculate the height of a single row in the listbox or dropdown list
// Note: It is calculated based on what layout returns for the maxElement
// size, rather than trying to take the scrolledAreaHeight and dividing by the number
// of option elements. The reason is that their may be option groups in addition to
// option elements. Either of which may be visible or invisible.
PRInt32 heightOfARow = scrolledAreaDesiredSize.maxElementSize->height;
heightOfARow -= (border.top + border.bottom);
// Check to see if we have zero item and
// whether we have no width and height
// The following code measures the width and height
// of a bogus string so the list actually displays
PRInt32 length = 0;
GetNumberOfOptions(&length);
/*if (!isInDropDownMode && (0 == length || (0 == visibleWidth && 0 == heightOfARow))) {
nsCOMPtr<nsIPresShell> presShell;
nsresult rv = aPresContext.GetShell(getter_AddRefs(presShell));
if (NS_SUCCEEDED(rv) && presShell) {
nsCOMPtr<nsIRenderingContext> renderContext;
rv = presShell->CreateRenderingContext(this, getter_AddRefs(renderContext));
if (NS_SUCCEEDED(rv) && renderContext) {
nsSize size;
rv = presShell->CreateRenderingContext(this, getter_AddRefs(renderContext));
const nsStyleFont* fontStyle = (const nsStyleFont*)mStyleContext->GetStyleData(eStyleStruct_Font);
renderContext->SetFont(fontStyle->mFont);
nsFormControlHelper::GetTextSize(aPresContext, this, nsAutoString("XX"), size, renderContext);
visibleWidth = size.width;
heightOfARow = size.height;
}
}
}*/
nscoord visibleHeight = 0;
if (isInDropDownMode) {
// Compute the visible height of the drop-down list
// The dropdown list height is the smaller of it's height setting or the height
// of the smallest box that can drawn around it's contents.
visibleHeight = scrolledAreaHeight;
if (visibleHeight > (kMaxDropDownRows * heightOfARow)) {
visibleHeight = (kMaxDropDownRows * heightOfARow);
}
} else {
// Calculate the visible height of the listbox
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedHeight) {
visibleHeight = aReflowState.mComputedHeight;
} else {
PRInt32 numRows = 1;
GetSizeAttribute(&numRows);
if (numRows == kNoSizeSpecified) {
visibleHeight = aReflowState.mComputedHeight;
}
else {
visibleHeight = numRows * heightOfARow;
}
}
}
// There are no items in the list
// but we want to include space for the scrollbars
// So fake like we will need scrollbars also
if (!isInDropDownMode && 0 == length) {
scrolledAreaHeight = visibleHeight+1;
}
PRBool needsVerticalScrollbar = PR_FALSE;
if (visibleHeight < scrolledAreaHeight) {
needsVerticalScrollbar = PR_TRUE;
}
if (needsVerticalScrollbar && !isInDropDownMode) {
visibleWidth += scrollbarWidth;
mIsScrollbarVisible = PR_TRUE; // XXX temp code
} else {
mIsScrollbarVisible = PR_FALSE; // XXX temp code
}
// options that are null <option></option> end up with no height
// so we need to make sure the list box size is at some small minimum
// because we could have a select with a single <option></option>
// which means we size the select do to almost nothing.
// We also have to make sure we set the mMaxWidth & mMaxHeight
// because these are used to calculate the size of the select
// get the css size
//nsSize txtSize;
//nsFormControlHelper::GetTextSize(aPresContext, this,nsAutoString("."), txtSize, aReflowState.rendContext);
/*if (visibleWidth < scrollbarWidth) {
visibleWidth = scrollbarWidth;
mMaxWidth = scrollbarWidth;
}*/
if (visibleHeight < scrollbarHeight) {
visibleHeight = scrollbarHeight;
mMaxHeight = scrollbarHeight;
}
// Do a second reflow with the adjusted width and height settings
// This sets up all of the frames with the correct width and height.
secondPassState.mComputedWidth = visibleWidth;
secondPassState.mComputedHeight = visibleHeight;
secondPassState.reason = eReflowReason_Resize;
nsScrollFrame::Reflow(aPresContext, aDesiredSize, secondPassState, aStatus);
// Set the max element size to be the same as the desired element size.
if (nsnull != aDesiredSize.maxElementSize) {
aDesiredSize.maxElementSize->width = aDesiredSize.width;
aDesiredSize.maxElementSize->height = aDesiredSize.height;
}
aStatus = NS_FRAME_COMPLETE;
mDisplayed = PR_TRUE;
return NS_OK;
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::GetFormContent(nsIContent*& aContent) const
{
nsIContent* content;
nsresult rv;
rv = GetContent(&content);
aContent = content;
return rv;
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::GetFont(nsIPresContext* aPresContext,
nsFont& aFont)
{
nsFormControlHelper::GetFont(this, aPresContext, mStyleContext, aFont);
return NS_OK;
}
//---------------------------------------------------------
PRBool
nsListControlFrame::IsOptionElement(nsIContent* aContent)
{
PRBool result = PR_FALSE;
nsCOMPtr<nsIDOMHTMLOptionElement> optElem;
if (NS_SUCCEEDED(aContent->QueryInterface(nsCOMTypeInfo<nsIDOMHTMLOptionElement>::GetIID(),(void**) getter_AddRefs(optElem)))) {
if (optElem != nsnull) {
result = PR_TRUE;
}
}
return result;
}
//---------------------------------------------------------
PRBool
nsListControlFrame::IsOptionElementFrame(nsIFrame *aFrame)
{
nsIContent *content = nsnull;
aFrame->GetContent(&content);
PRBool result = PR_FALSE;
if (nsnull != content) {
result = IsOptionElement(content);
NS_RELEASE(content);
}
return(result);
}
//---------------------------------------------------------
// Go up the frame tree looking for the first ancestor that has content
// which is selectable
nsIFrame *
nsListControlFrame::GetSelectableFrame(nsIFrame *aFrame)
{
nsIFrame* selectedFrame = aFrame;
while ((nsnull != selectedFrame) &&
(PR_FALSE ==IsOptionElementFrame(selectedFrame))) {
selectedFrame->GetParent(&selectedFrame);
}
return(selectedFrame);
}
//---------------------------------------------------------
void
nsListControlFrame::ForceRedraw()
{
//XXX: Hack. This should not be needed. The problem is DisplaySelected
//and DisplayDeselected set and unset an attribute on generic HTML content
//which does not know that it should repaint as the result of the attribute
//being set. This should not be needed once the event state manager handles
//selection.
nsFormControlHelper::ForceDrawFrame(this);
}
//---------------------------------------------------------
// XXX: Here we introduce a new -moz-option-selected attribute so a attribute
// selecitor n the ua.css can change the style when the option is selected.
void
nsListControlFrame::DisplaySelected(nsIContent* aContent)
{
//XXX: This is temporary. It simulates psuedo states by using a attribute selector on
// -moz-option-selected in the ua.css style sheet. This will not be needed when
// The event state manager supports selected states. KMM
nsIAtom * selectedAtom = NS_NewAtom(kMozSelected);
if (PR_TRUE == mDisplayed) {
aContent->SetAttribute(kNameSpaceID_None, selectedAtom, "", PR_TRUE);
ForceRedraw();
} else {
aContent->SetAttribute(kNameSpaceID_None, selectedAtom, "", PR_FALSE);
}
NS_RELEASE(selectedAtom);
}
//---------------------------------------------------------
void
nsListControlFrame::DisplayDeselected(nsIContent* aContent)
{
//XXX: This is temporary. It simulates psuedo states by using a attribute selector on
// -moz-option-selected in the ua.css style sheet. This will not be needed when
// The event state manager is functional. KMM
nsIAtom * selectedAtom = NS_NewAtom(kMozSelected);
if (PR_TRUE == mDisplayed) {
aContent->UnsetAttribute(kNameSpaceID_None, selectedAtom, PR_TRUE);
ForceRedraw();
} else {
aContent->UnsetAttribute(kNameSpaceID_None, selectedAtom, PR_FALSE);
}
NS_RELEASE(selectedAtom);
}
//---------------------------------------------------------
// Starts at the passed in content object and walks up the
// parent heierarchy looking for the nsIDOMHTMLOptionElement
//---------------------------------------------------------
nsIContent *
nsListControlFrame::GetOptionFromContent(nsIContent *aContent)
{
nsIContent * content = aContent;
NS_ADDREF(content);
while (nsnull != content) {
if (IsOptionElement(content)) {
return content;
}
nsIContent * node = content;
node->GetParent(content); // this add refs
NS_RELEASE(node);
}
return nsnull;
}
//---------------------------------------------------------
// Finds the index of the hit frame's content in the list
// of option elements
//---------------------------------------------------------
PRInt32
nsListControlFrame::GetSelectedIndexFromContent(nsIContent *aContent)
{
// Search the list of option elements looking for a match
// between the hit frame's content and the content of an option element
// get the collection of option items
nsIDOMHTMLCollection* options = GetOptions(mContent);
if (nsnull != options) {
PRUint32 numOptions;
options->GetLength(&numOptions);
PRUint32 inx;
for (inx = 0; inx < numOptions; inx++) {
nsIContent* option = nsnull;
option = GetOptionAsContent(options, inx);
if (nsnull != option) {
if (option == aContent) {
NS_RELEASE(option);
NS_RELEASE(options);
return inx;
}
NS_RELEASE(option);
}
}
NS_RELEASE(options);
}
return kNothingSelected;
}
//---------------------------------------------------------
// Finds the index of the hit frame's content in the list
// of option elements
//---------------------------------------------------------
PRInt32
nsListControlFrame::GetSelectedIndexFromFrame(nsIFrame *aHitFrame)
{
PRInt32 indx = kNothingSelected;
// Get the content of the frame that was selected
nsIContent* selectedContent = nsnull;
NS_ASSERTION(aHitFrame, "No frame for html <select> element\n");
if (aHitFrame) {
aHitFrame->GetContent(&selectedContent);
indx = GetSelectedIndexFromContent(selectedContent);
NS_RELEASE(selectedContent);
}
return indx;
}
//---------------------------------------------------------
void
nsListControlFrame::ClearSelection()
{
PRInt32 length = 0;
GetNumberOfOptions(&length);
for (PRInt32 i = 0; i < length; i++) {
if (i != mSelectedIndex) {
SetContentSelected(i, PR_FALSE);
}
}
}
//---------------------------------------------------------
void
nsListControlFrame::ExtendedSelection(PRInt32 aStartIndex, PRInt32 aEndIndex, PRBool aDoInvert, PRBool aSetValue)
{
PRInt32 startInx;
PRInt32 endInx;
if (aStartIndex < aEndIndex) {
startInx = aStartIndex;
endInx = aEndIndex;
} else {
startInx = aEndIndex;
endInx = aStartIndex;
}
PRInt32 i = 0;
PRBool startInverting = PR_FALSE;
PRInt32 length = 0;
GetNumberOfOptions(&length);
for (i = 0; i < length; i++) {
if (i == startInx) {
startInverting = PR_TRUE;
}
if (startInverting && ((i != mStartExtendedIndex && aDoInvert) || !aDoInvert)) {
if (aDoInvert) {
SetContentSelected(i, !IsContentSelectedByIndex(i));
} else {
SetContentSelected(i, aSetValue);
}
}
if (i == endInx) {
startInverting = PR_FALSE;
}
}
}
//---------------------------------------------------------
void
nsListControlFrame::SingleSelection()
{
// Get Current selection
if (mSelectedIndex != kNothingSelected) {
if (mOldSelectedIndex != mSelectedIndex) {
// Deselect the previous selection if there is one
if (mOldSelectedIndex != kNothingSelected) {
SetContentSelected(mOldSelectedIndex, PR_FALSE);
}
// Display the new selection
SetContentSelected(mSelectedIndex, PR_TRUE);
} else {
// Selecting the currently selected item so do nothing.
}
}
}
//---------------------------------------------------------
void
nsListControlFrame::MultipleSelection(PRBool aIsShift, PRBool aIsControl)
{
if (kNothingSelected != mSelectedIndex) {
//if ((aIsShift) || (mButtonDown && (!aIsControl))) {
if (aIsShift) {
// Shift is held down
SetContentSelected(mSelectedIndex, PR_TRUE);
if (mEndExtendedIndex == kNothingSelected) {
mEndExtendedIndex = mSelectedIndex;
ExtendedSelection(mStartExtendedIndex, mEndExtendedIndex, PR_FALSE, PR_TRUE);
} else {
if (mStartExtendedIndex < mEndExtendedIndex) {
if (mSelectedIndex < mStartExtendedIndex) {
ExtendedSelection(mSelectedIndex+1, mEndExtendedIndex, PR_TRUE, PR_TRUE);
mEndExtendedIndex = mSelectedIndex;
} else if (mSelectedIndex > mEndExtendedIndex) {
ExtendedSelection(mEndExtendedIndex+1, mSelectedIndex, PR_FALSE, PR_TRUE);
mEndExtendedIndex = mSelectedIndex;
} else if (mSelectedIndex < mEndExtendedIndex) {
ExtendedSelection(mSelectedIndex+1, mEndExtendedIndex, PR_FALSE, PR_FALSE);
mEndExtendedIndex = mSelectedIndex;
}
} else if (mStartExtendedIndex > mEndExtendedIndex) {
if (mSelectedIndex > mStartExtendedIndex) {
ExtendedSelection(mEndExtendedIndex, mSelectedIndex-1, PR_TRUE, PR_TRUE);
mEndExtendedIndex = mSelectedIndex;
} else if (mSelectedIndex < mEndExtendedIndex) {
ExtendedSelection(mStartExtendedIndex, mEndExtendedIndex-1, PR_FALSE, PR_TRUE);
mEndExtendedIndex = mSelectedIndex;
} else if (mSelectedIndex > mEndExtendedIndex) {
ExtendedSelection(mEndExtendedIndex, mSelectedIndex-1, PR_FALSE, PR_FALSE);
mEndExtendedIndex = mSelectedIndex;
}
}
}
} else if (aIsControl) {
// Control is held down
if (IsContentSelectedByIndex(mSelectedIndex)) {
SetContentSelected(mSelectedIndex, PR_FALSE);
} else {
SetContentSelected(mSelectedIndex, PR_TRUE);
}
} else {
// Neither control nor shift is held down
SetContentSelected(mSelectedIndex, PR_TRUE);
mStartExtendedIndex = mSelectedIndex;
mEndExtendedIndex = kNothingSelected;
ClearSelection();
}
}
}
//---------------------------------------------------------
void
nsListControlFrame::HandleListSelection(nsIDOMEvent* aEvent)
{
PRBool multipleSelections = PR_FALSE;
GetMultiple(&multipleSelections);
if (multipleSelections) {
nsCOMPtr<nsIDOMUIEvent> uiEvent = do_QueryInterface(aEvent);
PRBool isShift;
PRBool isControl;
uiEvent->GetCtrlKey(&isControl);
uiEvent->GetShiftKey(&isShift);
MultipleSelection(isShift, isControl);
} else {
SingleSelection();
}
}
//---------------------------------------------------------
PRBool
nsListControlFrame::HasSameContent(nsIFrame* aFrame1, nsIFrame* aFrame2)
{
// Quick check, if the frames are equal they must have
// the same content
if (aFrame1 == aFrame2)
return PR_TRUE;
PRBool result = PR_FALSE;
nsIContent* content1 = nsnull;
nsIContent* content2 = nsnull;
aFrame1->GetContent(&content1);
aFrame2->GetContent(&content2);
if (aFrame1 == aFrame2) {
result = PR_TRUE;
}
NS_IF_RELEASE(content1);
NS_IF_RELEASE(content2);
return(result);
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::CaptureMouseEvents(PRBool aGrabMouseEvents)
{
// get its view
nsIView* view = nsnull;
GetView(&view);
nsCOMPtr<nsIViewManager> viewMan;
PRBool result;
if (view) {
view->GetViewManager(*getter_AddRefs(viewMan));
if (viewMan) {
if (aGrabMouseEvents) {
viewMan->GrabMouseEvents(view,result);
mIsCapturingMouseEvents = PR_TRUE;
} else {
viewMan->GrabMouseEvents(nsnull,result);
mIsCapturingMouseEvents = PR_FALSE;
}
// XXX this is temp code
if (!mIsScrollbarVisible) {
nsIWidget * widget;
view->GetWidget(widget);
if (nsnull != widget) {
widget->CaptureMouse(aGrabMouseEvents);
NS_RELEASE(widget);
}
}
}
}
return NS_OK;
}
//---------------------------------------------------------
nsIView*
nsListControlFrame::GetViewFor(nsIWidget* aWidget)
{
nsIView* view = nsnull;
void* clientData;
NS_PRECONDITION(nsnull != aWidget, "null widget ptr");
// The widget's client data points back to the owning view
if (aWidget && NS_SUCCEEDED(aWidget->GetClientData(clientData))) {
view = (nsIView*)clientData;
}
return view;
}
//---------------------------------------------------------
// Determine if a view is an ancestor of another view.
PRBool
nsListControlFrame::IsAncestor(nsIView* aAncestor, nsIView* aChild)
{
nsIView* view = aChild;
while (nsnull != view) {
if (view == aAncestor)
// Is an ancestor
return(PR_TRUE);
else {
view->GetParent(view);
}
}
// Not an ancestor
return(PR_FALSE);
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::HandleEvent(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus)
{
/*const char * desc[] = {"NS_MOUSE_MOVE",
"NS_MOUSE_LEFT_BUTTON_UP",
"NS_MOUSE_LEFT_BUTTON_DOWN",
"<NA>","<NA>","<NA>","<NA>","<NA>","<NA>","<NA>",
"NS_MOUSE_MIDDLE_BUTTON_UP",
"NS_MOUSE_MIDDLE_BUTTON_DOWN",
"<NA>","<NA>","<NA>","<NA>","<NA>","<NA>","<NA>","<NA>",
"NS_MOUSE_RIGHT_BUTTON_UP",
"NS_MOUSE_RIGHT_BUTTON_DOWN",
"NS_MOUSE_ENTER",
"NS_MOUSE_EXIT",
"NS_MOUSE_LEFT_DOUBLECLICK",
"NS_MOUSE_MIDDLE_DOUBLECLICK",
"NS_MOUSE_RIGHT_DOUBLECLICK",
"NS_MOUSE_LEFT_CLICK",
"NS_MOUSE_MIDDLE_CLICK",
"NS_MOUSE_RIGHT_CLICK"};
int inx = aEvent->message-NS_MOUSE_MESSAGE_START;
if (inx >= 0 && inx <= (NS_MOUSE_RIGHT_CLICK-NS_MOUSE_MESSAGE_START)) {
printf("Mouse in ListFrame %s [%d]\n", desc[inx], aEvent->message);
} else {
printf("Mouse in ListFrame <UNKNOWN> [%d]\n", aEvent->message);
}*/
if (nsEventStatus_eConsumeNoDefault == aEventStatus)
return NS_OK;
if (nsFormFrame::GetDisabled(this))
return NS_OK;
switch(aEvent->message) {
case NS_KEY_PRESS:
if (NS_KEY_EVENT == aEvent->eventStructType) {
nsKeyEvent* keyEvent = (nsKeyEvent*)aEvent;
printf("---> %d %c\n", keyEvent->keyCode, keyEvent->keyCode);
//if (NS_VK_SPACE == keyEvent->keyCode || NS_VK_RETURN == keyEvent->keyCode) {
// MouseClicked(&aPresContext);
//}
}
break;
default:
break;
}
return(nsScrollFrame::HandleEvent(aPresContext, aEvent, aEventStatus));
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::SetInitialChildList(nsIPresContext& aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList)
{
mContentFrame = aChildList;
return nsScrollFrame::SetInitialChildList(aPresContext, aListName, aChildList);
}
//---------------------------------------------------------
nsresult
nsListControlFrame::GetSizeAttribute(PRInt32 *aSize) {
nsresult rv = NS_OK;
nsIDOMHTMLSelectElement* selectElement;
rv = mContent->QueryInterface(nsCOMTypeInfo<nsIDOMHTMLSelectElement>::GetIID(),(void**) &selectElement);
if (mContent && NS_SUCCEEDED(rv)) {
rv = selectElement->GetSize(aSize);
NS_RELEASE(selectElement);
}
return rv;
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::Init(nsIPresContext& aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow)
{
mPresContext = &aPresContext;
NS_ADDREF(mPresContext);
nsresult result = nsScrollFrame::Init(aPresContext, aContent, aParent, aContext,
aPrevInFlow);
// Initialize the current selected and not selected state's for
// the listbox items from the content. This is done here because
// The selected content sets an attribute that must be on the content
// before the option element's frames are constructed so the frames will
// get the proper style based on attribute selectors which refer to the
// selected attribute.
if (!mIsInitializedFromContent) {
Reset();
}
// get the reciever interface from the browser button's content node
nsCOMPtr<nsIDOMEventReceiver> reciever(do_QueryInterface(mContent));
// we shouldn't have to unregister this listener because when
// our frame goes away all these content node go away as well
// because our frame is the only one who references them.
reciever->AddEventListenerByIID((nsIDOMMouseListener *)this, kIDOMMouseListenerIID);
reciever->AddEventListenerByIID((nsIDOMMouseMotionListener *)this, kIDOMMouseMotionListenerIID);
reciever->AddEventListenerByIID((nsIDOMKeyListener *)this, kIDOMKeyListenerIID);
return result;
}
//---------------------------------------------------------
nscoord
nsListControlFrame::GetVerticalInsidePadding(float aPixToTwip,
nscoord aInnerHeight) const
{
return NSIntPixelsToTwips(0, aPixToTwip);
}
//---------------------------------------------------------
nscoord
nsListControlFrame::GetHorizontalInsidePadding(nsIPresContext& aPresContext,
float aPixToTwip,
nscoord aInnerWidth,
nscoord aCharWidth) const
{
return GetVerticalInsidePadding(aPixToTwip, aInnerWidth);
}
//---------------------------------------------------------
// Returns whether the nsIDOMHTMLSelectElement supports
// mulitple selection
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::GetMultiple(PRBool* aMultiple, nsIDOMHTMLSelectElement* aSelect)
{
if (!aSelect) {
nsIDOMHTMLSelectElement* selectElement = nsnull;
nsresult result = mContent->QueryInterface(nsCOMTypeInfo<nsIDOMHTMLSelectElement>::GetIID(),
(void**)&selectElement);
if (NS_SUCCEEDED(result) && selectElement) {
result = selectElement->GetMultiple(aMultiple);
NS_RELEASE(selectElement);
}
return result;
} else {
return aSelect->GetMultiple(aMultiple);
}
}
//---------------------------------------------------------
// for a given piece of content it returns nsIDOMHTMLSelectElement object
// or null
//---------------------------------------------------------
nsIDOMHTMLSelectElement*
nsListControlFrame::GetSelect(nsIContent * aContent)
{
nsIDOMHTMLSelectElement* selectElement = nsnull;
nsresult result = aContent->QueryInterface(nsCOMTypeInfo<nsIDOMHTMLSelectElement>::GetIID(),
(void**)&selectElement);
if (NS_SUCCEEDED(result) && selectElement) {
return selectElement;
} else {
return nsnull;
}
}
//---------------------------------------------------------
// Returns the nsIContent object in the collection
// for a given index
//---------------------------------------------------------
nsIContent*
nsListControlFrame::GetOptionAsContent(nsIDOMHTMLCollection* aCollection, PRInt32 aIndex)
{
nsIContent * content = nsnull;
nsIDOMHTMLOptionElement* optionElement = GetOption(*aCollection, aIndex);
if (nsnull != optionElement) {
optionElement->QueryInterface(nsCOMTypeInfo<nsIContent>::GetIID(),(void**) &content);
NS_RELEASE(optionElement);
}
return content;
}
//---------------------------------------------------------
// for a given index it returns the nsIContent object
// from the select
//---------------------------------------------------------
nsIContent*
nsListControlFrame::GetOptionContent(PRInt32 aIndex)
{
nsIContent* content = nsnull;
nsIDOMHTMLCollection* options = GetOptions(mContent);
if (nsnull != options) {
content = GetOptionAsContent(options, aIndex);
NS_RELEASE(options);
}
return(content);
}
//---------------------------------------------------------
// This returns the collection for nsIDOMHTMLSelectElement or
// the nsIContent object is the select is null
//---------------------------------------------------------
nsIDOMHTMLCollection*
nsListControlFrame::GetOptions(nsIContent * aContent, nsIDOMHTMLSelectElement* aSelect)
{
nsIDOMHTMLCollection* options = nsnull;
if (!aSelect) {
nsIDOMHTMLSelectElement* selectElement = GetSelect(aContent);
if (selectElement) {
selectElement->GetOptions(&options);
NS_RELEASE(selectElement);
return options;
} else {
return nsnull;
}
} else {
aSelect->GetOptions(&options);
return options;
}
}
//---------------------------------------------------------
// Returns the nsIDOMHTMLOptionElement for a given index
// in the select's collection
//---------------------------------------------------------
nsIDOMHTMLOptionElement*
nsListControlFrame::GetOption(nsIDOMHTMLCollection& aCollection, PRInt32 aIndex)
{
nsIDOMNode* node = nsnull;
if (NS_SUCCEEDED(aCollection.Item(aIndex, &node))) {
if (nsnull != node) {
nsIDOMHTMLOptionElement* option = nsnull;
node->QueryInterface(nsCOMTypeInfo<nsIDOMHTMLOptionElement>::GetIID(), (void**)&option);
NS_RELEASE(node);
return option;
}
}
return nsnull;
}
//---------------------------------------------------------
// For a given index in the collection it sets the aValue
// parameter with the "value" ATTRIBUTE from the DOM element
// This method return PR_TRUE if successful
//---------------------------------------------------------
PRBool
nsListControlFrame::GetOptionValue(nsIDOMHTMLCollection& aCollection,
PRInt32 aIndex,
nsString& aValue)
{
PRBool status = PR_FALSE;
nsIDOMHTMLOptionElement* option = GetOption(aCollection, aIndex);
if (option) {
nsresult result = option->GetValue(aValue);
if (aValue.Length() > 0) {
status = PR_TRUE;
} else {
result = option->GetText(aValue);
if (aValue.Length() > 0) {
status = PR_TRUE;
}
}
NS_RELEASE(option);
}
return status;
}
//---------------------------------------------------------
// For a given piece of content, it determines whether the
// content (an option) is selected or not
// return PR_TRUE if it is, PR_FALSE if it is NOT
//---------------------------------------------------------
PRBool
nsListControlFrame::IsContentSelected(nsIContent* aContent)
{
nsString value;
nsIAtom * selectedAtom = NS_NewAtom(kMozSelected);
//nsIAtom * selectedAtom = NS_NewAtom("selected");
nsresult result = aContent->GetAttribute(kNameSpaceID_None, selectedAtom, value);
NS_RELEASE(selectedAtom);
return (NS_CONTENT_ATTR_NOT_THERE == result ? PR_FALSE : PR_TRUE);
}
//---------------------------------------------------------
// For a given index is return whether the content is selected
//---------------------------------------------------------
PRBool
nsListControlFrame::IsContentSelectedByIndex(PRInt32 aIndex)
{
nsIContent* content = GetOptionContent(aIndex);
NS_ASSERTION(nsnull != content, "Failed to retrieve option content");
PRBool result = IsContentSelected(content);
NS_RELEASE(content);
return result;
}
//---------------------------------------------------------
// gets the content (an option) by index and then set it as
// being selected or not selected
//---------------------------------------------------------
void
nsListControlFrame::SetContentSelected(PRInt32 aIndex, PRBool aSelected)
{
if (aIndex == kNothingSelected) {
return;
}
nsIContent* content = GetOptionContent(aIndex);
NS_ASSERTION(nsnull != content, "Failed to retrieve option content");
if (aSelected) {
DisplaySelected(content);
} else {
DisplayDeselected(content);
}
NS_IF_RELEASE(content);
}
//---------------------------------------------------------
// Deselects all the content items in the select
//---------------------------------------------------------
nsresult
nsListControlFrame::Deselect()
{
PRInt32 i;
PRInt32 max = 0;
GetNumberOfOptions(&max);
for (i=0;i<max;i++) {
SetContentSelected(i, PR_FALSE);
}
mSelectedIndex = kNothingSelected;
return NS_OK;
}
//---------------------------------------------------------
PRIntn
nsListControlFrame::GetSkipSides() const
{
// Don't skip any sides during border rendering
return 0;
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::GetType(PRInt32* aType) const
{
*aType = NS_FORM_SELECT;
return NS_OK;
}
//---------------------------------------------------------
void
nsListControlFrame::SetFormFrame(nsFormFrame* aFormFrame)
{
mFormFrame = aFormFrame;
}
//---------------------------------------------------------
PRBool
nsListControlFrame::IsSuccessful(nsIFormControlFrame* aSubmitter)
{
nsAutoString name;
return (NS_CONTENT_ATTR_HAS_VALUE == GetName(&name));
}
//---------------------------------------------------------
void
nsListControlFrame::MouseClicked(nsIPresContext* aPresContext)
{
}
//---------------------------------------------------------
PRInt32
nsListControlFrame::GetMaxNumValues()
{
PRBool multiple;
GetMultiple(&multiple);
if (multiple) {
PRUint32 length = 0;
nsIDOMHTMLCollection* options = GetOptions(mContent);
if (options) {
options->GetLength(&length);
}
return (PRInt32)length; // XXX fix return on GetMaxNumValues
} else {
return 1;
}
}
//---------------------------------------------------------
// Resets the select back to it's original default values;
// those values as determined by the original HTML
//---------------------------------------------------------
void
nsListControlFrame::Reset()
{
nsIDOMHTMLCollection* options = GetOptions(mContent);
if (!options) {
return;
}
PRUint32 numOptions;
options->GetLength(&numOptions);
Deselect();
PRUint32 i;
for (i = 0; i < numOptions; i++) {
nsIDOMHTMLOptionElement* option = GetOption(*options, i);
if (option) {
PRBool selected = PR_FALSE;
option->GetDefaultSelected(&selected);
if (selected) {
mSelectedIndex = i;
SetContentSelected(i, PR_TRUE);
}
NS_RELEASE(option);
}
}
NS_RELEASE(options);
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::GetName(nsString* aResult)
{
nsresult result = NS_FORM_NOTOK;
if (mContent) {
nsIHTMLContent* formControl = nsnull;
result = mContent->QueryInterface(nsCOMTypeInfo<nsIHTMLContent>::GetIID(),(void**)&formControl);
if (NS_SUCCEEDED(result) && formControl) {
nsHTMLValue value;
result = formControl->GetHTMLAttribute(nsHTMLAtoms::name, value);
if (NS_CONTENT_ATTR_HAS_VALUE == result) {
if (eHTMLUnit_String == value.GetUnit()) {
value.GetStringValue(*aResult);
}
}
NS_RELEASE(formControl);
}
}
return result;
}
//---------------------------------------------------------
PRInt32
nsListControlFrame::GetNumberOfSelections()
{
PRInt32 count = 0;
PRInt32 length = 0;
GetNumberOfOptions(&length);
PRInt32 i = 0;
for (i = 0; i < length; i++) {
if (IsContentSelectedByIndex(i)) {
count++;
}
}
return(count);
}
//---------------------------------------------------------
PRBool
nsListControlFrame::GetNamesValues(PRInt32 aMaxNumValues, PRInt32& aNumValues,
nsString* aValues, nsString* aNames)
{
aNumValues = 0;
nsAutoString name;
nsresult result = GetName(&name);
if ((aMaxNumValues <= 0) || (NS_CONTENT_ATTR_NOT_THERE == result)) {
return PR_FALSE;
}
nsIDOMHTMLCollection* options = GetOptions(mContent);
if (!options) {
return PR_FALSE;
}
PRBool status = PR_FALSE;
PRBool multiple;
GetMultiple(&multiple);
if (!multiple) {
if (mSelectedIndex >= 0) {
nsAutoString value;
GetOptionValue(*options, mSelectedIndex, value);
aNumValues = 1;
aNames[0] = name;
aValues[0] = value;
status = PR_TRUE;
}
}
else {
aNumValues = 0;
PRInt32 length = 0;
GetNumberOfOptions(&length);
for (int i = 0; i < length; i++) {
if (PR_TRUE == IsContentSelectedByIndex(i)) {
nsAutoString value;
GetOptionValue(*options, i, value);
aNames[aNumValues] = name;
aValues[aNumValues] = value;
aNumValues++;
}
}
status = PR_TRUE;
}
NS_RELEASE(options);
return status;
}
//---------------------------------------------------------
void
nsListControlFrame::SetFocus(PRBool aOn, PRBool aRepaint)
{
// XXX:TODO Make set focus work
}
//---------------------------------------------------------
void
nsListControlFrame::ScrollIntoView(nsIPresContext* aPresContext)
{
if (aPresContext) {
nsCOMPtr<nsIPresShell> presShell;
aPresContext->GetShell(getter_AddRefs(presShell));
presShell->ScrollFrameIntoView(this,
NS_PRESSHELL_SCROLL_ANYWHERE,NS_PRESSHELL_SCROLL_ANYWHERE);
}
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::SetComboboxFrame(nsIFrame* aComboboxFrame)
{
nsresult rv = NS_OK;
if (nsnull != aComboboxFrame) {
rv = aComboboxFrame->QueryInterface(nsCOMTypeInfo<nsIComboboxControlFrame>::GetIID(),(void**) &mComboboxFrame);
}
return rv;
}
//---------------------------------------------------------
// Gets the text of the currently selected item
// if the there are zero items then an empty string is returned
// if there is nothing selected, then the 0th item's text is returned
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::GetSelectedItem(nsString & aStr)
{
aStr = "";
nsresult rv = NS_ERROR_FAILURE;
nsIDOMHTMLCollection* options = GetOptions(mContent);
if (nsnull != options) {
PRUint32 numOptions;
options->GetLength(&numOptions);
if (numOptions == 0) {
rv = NS_OK;
} else {
PRInt32 selectedIndex = (mSelectedIndex == kNothingSelected ? 0 : mSelectedIndex);
nsIDOMHTMLOptionElement* optionElement = GetOption(*options, selectedIndex);
if (nsnull != optionElement) {
nsAutoString text;
if (NS_CONTENT_ATTR_HAS_VALUE == optionElement->GetText(text)) {
aStr = text;
rv = NS_OK;
}
NS_RELEASE(optionElement);
}
}
NS_RELEASE(options);
}
return rv;
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::GetSelectedIndex(PRInt32 * aIndex)
{
*aIndex = mSelectedIndex;
return NS_OK;
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::GetSelectedIndexFromDOM(PRInt32 * aIndex)
{
// figure out which item is selected by looking at which
// option are selected
*aIndex = kNothingSelected;
nsIDOMHTMLCollection* options = GetOptions(mContent);
if (options) {
PRUint32 numOptions;
options->GetLength(&numOptions);
PRUint32 inx;
for (inx = 0; inx < numOptions && (*aIndex == kNothingSelected); inx++) {
nsIContent* content = GetOptionAsContent(options, inx);
if (nsnull != content) {
if (IsContentSelected(content)) {
*aIndex = (PRInt32)inx;
}
NS_RELEASE(content);
}
}
NS_RELEASE(options);
}
return NS_ERROR_FAILURE;
}
//---------------------------------------------------------
PRBool
nsListControlFrame::IsInDropDownMode()
{
return((nsnull == mComboboxFrame) ? PR_FALSE : PR_TRUE);
}
//---------------------------------------------------------
nsresult
nsListControlFrame::RequiresWidget(PRBool& aRequiresWidget)
{
aRequiresWidget = PR_FALSE;
return NS_OK;
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::GetNumberOfOptions(PRInt32* aNumOptions)
{
nsIDOMHTMLCollection* options = GetOptions(mContent);
if (nsnull == options) {
*aNumOptions = 0;
} else {
PRUint32 length = 0;
options->GetLength(&length);
*aNumOptions = (PRInt32)length;
NS_RELEASE(options);
}
return NS_OK;
}
//---------------------------------------------------------
// Select the specified item in the listbox using control logic.
// If it a single selection listbox the previous selection will be
// de-selected.
void
nsListControlFrame::ToggleSelected(PRInt32 aIndex)
{
PRBool multiple;
GetMultiple(&multiple);
if (PR_TRUE == multiple) {
SetContentSelected(aIndex, PR_TRUE);
} else {
SetContentSelected(mSelectedIndex, PR_FALSE);
SetContentSelected(aIndex, PR_TRUE);
mSelectedIndex = aIndex;
}
}
//----------------------------------------------------------------------
// nsISelectControlFrame
//----------------------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::AddOption(PRInt32 aIndex)
{
PRInt32 numOptions;
GetNumberOfOptions(&numOptions);
PRInt32 selectedIndex;
GetSelectedIndexFromDOM(&selectedIndex); // comes from the DOM
if (1 == numOptions || mSelectedIndex == kNothingSelected || selectedIndex != mSelectedIndex) {
mSelectedIndex = selectedIndex;
if (nsnull != mComboboxFrame) {
mComboboxFrame->UpdateSelection(PR_FALSE, PR_TRUE, selectedIndex); // don't dispatch event
}
} else {
mSelectedIndex = selectedIndex;
}
return NS_OK;
}
NS_IMETHODIMP
nsListControlFrame::RemoveOption(PRInt32 aIndex)
{
PRInt32 numOptions;
GetNumberOfOptions(&numOptions);
PRInt32 selectedIndex;
GetSelectedIndexFromDOM(&selectedIndex); // comes from the DOM
if (aIndex == mSelectedIndex) {
ToggleSelected(selectedIndex); // sets mSelectedIndex
} else {
mSelectedIndex = selectedIndex;
}
if (nsnull != mComboboxFrame) {
mComboboxFrame->UpdateSelection(PR_FALSE, PR_TRUE, selectedIndex); // don't dispatch event
}
return NS_OK;
}
//---------------------------------------------------------
// Select the specified item in the listbox using control logic.
// If it a single selection listbox the previous selection will be
// de-selected.
NS_IMETHODIMP
nsListControlFrame::SetOptionSelected(PRInt32 aIndex, PRBool aValue)
{
PRBool multiple;
GetMultiple(&multiple);
if (PR_TRUE == multiple) {
SetContentSelected(aIndex, aValue);
} else {
if (aValue) {
SetContentSelected(mSelectedIndex, PR_FALSE);
SetContentSelected(aIndex, PR_TRUE);
mSelectedIndex = aIndex;
} else {
SetContentSelected(aIndex, PR_FALSE);
if (mSelectedIndex == aIndex) {
mSelectedIndex = -1;
}
}
}
return NS_OK;
}
//----------------------------------------------------------------------
// End nsISelectControlFrame
//----------------------------------------------------------------------
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::SetProperty(nsIAtom* aName, const nsString& aValue)
{
if (nsHTMLAtoms::selected == aName) {
return NS_ERROR_INVALID_ARG; // Selected is readonly according to spec.
} else if (nsHTMLAtoms::selectedindex == aName) {
PRInt32 error = 0;
PRInt32 selectedIndex = aValue.ToInteger(&error, 10); // Get index from aValue
if (error) {
return NS_ERROR_INVALID_ARG; // Couldn't convert to integer
} else {
// Select the specified item in the list box.
if (mSelectedIndex != selectedIndex) {
ToggleSelected(selectedIndex);// sets mSelectedIndex
if (nsnull != mComboboxFrame) {
mComboboxFrame->UpdateSelection(PR_FALSE, PR_TRUE, selectedIndex); // don't dispatch event
}
}
}
}
return NS_OK;
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::GetProperty(nsIAtom* aName, nsString& aValue)
{
// Get the selected value of option from local cache (optimization vs. widget)
if (nsHTMLAtoms::selected == aName) {
PRInt32 error = 0;
PRBool selected = PR_FALSE;
PRInt32 indx = aValue.ToInteger(&error, 10); // Get index from aValue
if (error == 0)
selected = IsContentSelectedByIndex(indx);
nsFormControlHelper::GetBoolString(selected, aValue);
// For selectedIndex, get the value from the widget
} else if (nsHTMLAtoms::selectedindex == aName) {
// figures out the first selected item from the content
PRInt32 selectedIndex;
GetSelectedIndexFromDOM(&selectedIndex);
aValue.Append(selectedIndex, 10);
//aValue.Append(mSelectedIndex, 10);
}
return NS_OK;
}
//---------------------------------------------------------
// Create a Borderless top level widget for drop-down lists.
nsresult
nsListControlFrame::CreateScrollingViewWidget(nsIView* aView, const nsStylePosition* aPosition)
{
if (IsInDropDownMode() == PR_TRUE) {
nsWidgetInitData widgetData;
aView->SetZIndex(kMaxZ);
widgetData.mWindowType = eWindowType_popup;
widgetData.mBorderStyle = eBorderStyle_default;
static NS_DEFINE_IID(kCChildCID, NS_CHILD_CID);
aView->CreateWidget(kCChildCID,
&widgetData,
nsnull);
return NS_OK;
} else {
return nsScrollFrame::CreateScrollingViewWidget(aView, aPosition);
}
}
//---------------------------------------------------------
void
nsListControlFrame::GetViewOffset(nsIViewManager* aManager, nsIView* aView,
nsPoint& aPoint)
{
aPoint.x = 0;
aPoint.y = 0;
nsIView *parent;
nsRect bounds;
parent = aView;
while (nsnull != parent) {
parent->GetBounds(bounds);
aPoint.x += bounds.x;
aPoint.y += bounds.y;
parent->GetParent(parent);
}
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::SyncViewWithFrame()
{
// Resync the view's position with the frame.
// The problem is the dropdown's view is attached directly under
// the root view. This means it's view needs to have it's coordinates calculated
// as if it were in it's normal position in the view hierarchy.
mComboboxFrame->AbsolutelyPositionDropDown();
nsPoint parentPos;
nsCOMPtr<nsIViewManager> viewManager;
//Get parent frame
nsIFrame* parent;
GetParentWithView(&parent);
NS_ASSERTION(parent, "GetParentWithView failed");
// Get parent view
nsIView* parentView = nsnull;
parent->GetView(&parentView);
parentView->GetViewManager(*getter_AddRefs(viewManager));
GetViewOffset(viewManager, parentView, parentPos);
nsIView* view = nsnull;
GetView(&view);
nsIView* containingView = nsnull;
nsPoint offset;
GetOffsetFromView(offset, &containingView);
//nsSize size;
//GetSize(size);
nscoord width;
nscoord height;
view->GetDimensions(&width, &height);
if (width != mRect.width || height != mRect.height) {
viewManager->ResizeView(view, mRect.width, mRect.height);
}
nscoord x;
nscoord y;
view->GetPosition(&x, &y);
nscoord newX = parentPos.x + offset.x;
nscoord newY = parentPos.y + offset.y;
//if (newX != x || newY != y) {
viewManager->MoveViewTo(view, newX, newY);
//}
nsViewVisibility visibility;
view->GetVisibility(visibility);
const nsStyleDisplay* disp;
GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) disp);
if (visibility != disp->mVisible) {
view->SetVisibility(NS_STYLE_VISIBILITY_HIDDEN == disp->mVisible ?nsViewVisibility_kHide:nsViewVisibility_kShow);
}
return NS_OK;
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::AboutToDropDown()
{
mSelectedIndexWhenPoppedDown = mSelectedIndex;
return NS_OK;
}
//---------------------------------------------------------
nsresult
nsListControlFrame::GetScrollingParentView(nsIFrame* aParent, nsIView** aParentView)
{
if (IsInDropDownMode() == PR_TRUE) {
// Use the parent frame to get the view manager
nsIView* parentView = nsnull;
nsresult rv = aParent->GetView(&parentView);
NS_ASSERTION(parentView, "GetView failed");
nsCOMPtr<nsIViewManager> viewManager;
parentView->GetViewManager(*getter_AddRefs(viewManager));
NS_ASSERTION(viewManager, "GetViewManager failed");
// Ask the view manager for the root view and
// use it as the parent for popup scrolling lists.
// Using the normal view as the parent causes the
// drop-down list to be clipped to a parent view.
// Using the root view as the parent
// prevents this from happening.
viewManager->GetRootView(*aParentView);
NS_ASSERTION(aParentView, "GetRootView failed");
return rv;
} else {
return nsScrollFrame::GetScrollingParentView(aParent, aParentView);
}
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::DidReflow(nsIPresContext& aPresContext,
nsDidReflowStatus aStatus)
{
if (PR_TRUE == IsInDropDownMode())
{
//SyncViewWithFrame();
mState &= ~NS_FRAME_SYNC_FRAME_AND_VIEW;
nsresult rv = nsScrollFrame::DidReflow(aPresContext, aStatus);
mState |= NS_FRAME_SYNC_FRAME_AND_VIEW;
SyncViewWithFrame();
return rv;
} else {
return nsScrollFrame::DidReflow(aPresContext, aStatus);
}
}
NS_IMETHODIMP nsListControlFrame::MoveTo(nscoord aX, nscoord aY)
{
if (PR_TRUE == IsInDropDownMode())
{
//SyncViewWithFrame();
mState &= ~NS_FRAME_SYNC_FRAME_AND_VIEW;
nsresult rv = nsScrollFrame::MoveTo(aX, aY);
mState |= NS_FRAME_SYNC_FRAME_AND_VIEW;
//SyncViewWithFrame();
return rv;
} else {
return nsScrollFrame::MoveTo(aX, aY);
}
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::GetMaximumSize(nsSize &aSize)
{
aSize.width = mMaxWidth;
aSize.height = mMaxHeight;
return NS_OK;
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::SetSuggestedSize(nscoord aWidth, nscoord aHeight)
{
return NS_OK;
}
//---------------------------------------------------------
NS_IMETHODIMP
nsListControlFrame::IsTargetOptionDisabled(PRBool &aIsDisabled)
{
nsresult rv = NS_ERROR_FAILURE;
aIsDisabled = PR_FALSE;
nsIEventStateManager *stateManager;
rv = mPresContext->GetEventStateManager(&stateManager);
if (NS_OK == rv) {
nsIContent * content;
rv = stateManager->GetEventTargetContent(&content);
if (NS_OK == rv && nsnull != content) {
if (IsOptionElement(content)) {
aIsDisabled = nsFormFrame::GetDisabled(this, content);
} else {
rv = NS_ERROR_FAILURE; // return error when it is not an option
}
NS_RELEASE(content);
}
NS_RELEASE(stateManager);
}
return rv;
}
//----------------------------------------------------------------------
// nsIDOMMouseListener
//----------------------------------------------------------------------
nsresult
nsListControlFrame::MouseUp(nsIDOMEvent* aMouseEvent)
{
if (nsFormFrame::GetDisabled(this)) {
return NS_OK;
}
// Check to see if the disabled option was clicked on
// NS_ERROR_FAILURE is returned is it isn't over an option
PRBool optionIsDisabled;
if (NS_OK == IsTargetOptionDisabled(optionIsDisabled)) {
if (optionIsDisabled) {
if (IsInDropDownMode() == PR_TRUE && mComboboxFrame) {
mSelectedIndex = mSelectedIndexWhenPoppedDown;
mComboboxFrame->ListWasSelected(mPresContext);
}
return NS_OK;
}
}
const nsStyleDisplay* disp = (const nsStyleDisplay*)mStyleContext->GetStyleData(eStyleStruct_Display);
if (!disp->mVisible) {
return NS_OK;
}
if (IsInDropDownMode() == PR_TRUE) {
if (NS_SUCCEEDED(GetIndexFromDOMEvent(aMouseEvent, mOldSelectedIndex, mSelectedIndex))) {
if (kNothingSelected != mSelectedIndex) {
SetContentSelected(mSelectedIndex, PR_TRUE);
}
if (mComboboxFrame) {
mComboboxFrame->ListWasSelected(mPresContext);
}
}
} else {
mButtonDown = PR_FALSE;
CaptureMouseEvents(PR_FALSE);
}
return NS_OK;
}
//----------------------------------------------------------------------
// Sets the mSelectedIndex and mOldSelectedIndex from figuring out what
// item was selected using content
// Returns NS_OK if it successfully found the selection
//----------------------------------------------------------------------
nsresult
nsListControlFrame::GetIndexFromDOMEvent(nsIDOMEvent* aMouseEvent,
PRInt32& aOldIndex,
PRInt32& aCurIndex)
{
nsresult rv = NS_ERROR_FAILURE;
nsIEventStateManager *stateManager;
if (NS_OK == mPresContext->GetEventStateManager(&stateManager)) {
nsIContent * content;
stateManager->GetEventTargetContent(&content);
///////////////////
{
nsCOMPtr<nsIDOMHTMLOptionElement> optElem;
if (NS_SUCCEEDED(content->QueryInterface(nsCOMTypeInfo<nsIDOMHTMLOptionElement>::GetIID(),(void**) getter_AddRefs(optElem)))) {
nsAutoString val;
optElem->GetValue(val);
#ifdef DEBUG_rods
printf("val [%s]\n", val.ToNewCString());
#endif
}
}
///////////////////
nsIContent * optionContent = GetOptionFromContent(content);
NS_RELEASE(content);
if (nsnull != optionContent) {
aOldIndex = aCurIndex;
aCurIndex = GetSelectedIndexFromContent(optionContent);
NS_RELEASE(optionContent);
rv = NS_OK;
}
NS_RELEASE(stateManager);
}
return rv;
}
//----------------------------------------------------------------------
nsresult
nsListControlFrame::MouseDown(nsIDOMEvent* aMouseEvent)
{
if (nsFormFrame::GetDisabled(this)) {
return NS_OK;
}
// Check to see if the disabled option was clicked on
// NS_ERROR_FAILURE is returned is it isn't over an option
PRBool optionIsDisabled;
if (NS_OK == IsTargetOptionDisabled(optionIsDisabled)) {
if (optionIsDisabled) {
if (IsInDropDownMode() == PR_TRUE) {
mSelectedIndex = mSelectedIndexWhenPoppedDown;
}
return NS_OK;
}
}
PRInt32 oldIndex;
PRInt32 curIndex = mSelectedIndex;
if (NS_SUCCEEDED(GetIndexFromDOMEvent(aMouseEvent, oldIndex, curIndex))) {
if (IsInDropDownMode() == PR_TRUE) {
// Do nothing
} else {
mSelectedIndex = curIndex;
mOldSelectedIndex = oldIndex;
// Handle Like List
mButtonDown = PR_TRUE;
CaptureMouseEvents(PR_TRUE);
HandleListSelection(aMouseEvent);
}
} else {
// NOTE: the combo box is responsible for dropping it down
if (mComboboxFrame) {
PRBool isDroppedDown;
mComboboxFrame->IsDroppedDown(&isDroppedDown);
mComboboxFrame->ShowDropDown(!isDroppedDown);
if (isDroppedDown) {
CaptureMouseEvents(PR_FALSE);
}
}
}
return NS_OK;
}
//----------------------------------------------------------------------
// nsIDOMMouseMotionListener
//----------------------------------------------------------------------
nsresult
nsListControlFrame::MouseMove(nsIDOMEvent* aMouseEvent)
{
if (IsInDropDownMode() == PR_TRUE) {
PRInt32 oldIndex;
PRInt32 curIndex = mSelectedIndex;
if (NS_SUCCEEDED(GetIndexFromDOMEvent(aMouseEvent, oldIndex, curIndex))) {
mSelectedIndex = curIndex;
mOldSelectedIndex = oldIndex;
if (kNothingSelected != mSelectedIndex) {
if (mOldSelectedIndex != mSelectedIndex) {
if (mOldSelectedIndex != kNothingSelected) {
SetContentSelected(mOldSelectedIndex, PR_FALSE);
}
SetContentSelected(mSelectedIndex, PR_TRUE);
}
}
}
}
return NS_OK;
}
//----------------------------------------------------------------------
// nsIDOMKeyListener
//----------------------------------------------------------------------
nsresult
nsListControlFrame::KeyDown(nsIDOMEvent* aKeyEvent)
{
nsCOMPtr<nsIDOMUIEvent> uiEvent = do_QueryInterface(aKeyEvent);
PRUint32 code;
uiEvent->GetCharCode(&code);
//printf("%c %d ", code, code);
uiEvent->GetKeyCode(&code);
//printf("%c %d\n", code, code);
nsresult rv = NS_ERROR_FAILURE;
nsIDOMHTMLCollection* options = GetOptions(mContent);
if (nsnull != options) {
PRUint32 numOptions;
options->GetLength(&numOptions);
if (numOptions == 0) {
rv = NS_OK;
} else {
PRInt32 selectedIndex = (mSelectedIndex == kNothingSelected ? 0 : mSelectedIndex+1);
PRInt32 inx;
for (inx = selectedIndex;inx<(PRInt32)numOptions;inx++) {
nsIDOMHTMLOptionElement* optionElement = GetOption(*options, inx);
if (nsnull != optionElement) {
nsAutoString text;
if (NS_CONTENT_ATTR_HAS_VALUE == optionElement->GetText(text)) {
//printf("%d == %d\n", text.CharAt(0), code);
char * buf = text.ToNewCString();
//printf("[%s] ", buf);
char c = buf[0];
delete [] buf;
if (c == (char)code) {
mOldSelectedIndex = mSelectedIndex;
mSelectedIndex = inx;
SingleSelection();
if (nsnull != mComboboxFrame) {
mComboboxFrame->UpdateSelection(PR_FALSE, PR_TRUE, mSelectedIndex); // don't dispatch event
}
break;
}
}
NS_RELEASE(optionElement);
}
}
}
NS_RELEASE(options);
}
return NS_OK;
}
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