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pjs/layout/forms/nsComboboxControlFrame.cpp

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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 1.1 (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 "nsCOMPtr.h"
#include "nsComboboxControlFrame.h"
#include "nsFormFrame.h"
#include "nsFormControlFrame.h"
#include "nsIHTMLContent.h"
#include "nsHTMLIIDs.h"
#include "nsHTMLAtoms.h"
#include "nsHTMLParts.h"
#include "nsIFormControl.h"
#include "nsINameSpaceManager.h"
#include "nsLayoutAtoms.h"
#include "nsIDOMElement.h"
#include "nsListControlFrame.h"
#include "nsIListControlFrame.h"
#include "nsIDOMHTMLCollection.h"
#include "nsIDOMHTMLSelectElement.h"
#include "nsIDOMHTMLOptionElement.h"
#include "nsIPresShell.h"
#include "nsISupportsArray.h"
#include "nsIDeviceContext.h"
#include "nsIView.h"
#include "nsIScrollableView.h"
#include "nsIEventStateManager.h"
#include "nsIDOMNode.h"
#include "nsIPrivateDOMEvent.h"
#include "nsIStatefulFrame.h"
#include "nsISupportsArray.h"
#include "nsISelectControlFrame.h"
#include "nsISupportsPrimitives.h"
#include "nsIComponentManager.h"
static NS_DEFINE_IID(kIFormControlFrameIID, NS_IFORMCONTROLFRAME_IID);
static NS_DEFINE_IID(kIComboboxControlFrameIID, NS_ICOMBOBOXCONTROLFRAME_IID);
static NS_DEFINE_IID(kIListControlFrameIID, NS_ILISTCONTROLFRAME_IID);
static NS_DEFINE_IID(kIDOMMouseListenerIID, NS_IDOMMOUSELISTENER_IID);
static NS_DEFINE_IID(kIFrameIID, NS_IFRAME_IID);
static NS_DEFINE_IID(kIAnonymousContentCreatorIID, NS_IANONYMOUS_CONTENT_CREATOR_IID);
static NS_DEFINE_IID(kIDOMNodeIID, NS_IDOMNODE_IID);
static NS_DEFINE_IID(kIPrivateDOMEventIID, NS_IPRIVATEDOMEVENT_IID);
// Drop down list event management.
// The combo box uses the following strategy for managing the
// drop-down list.
// If the combo box or it's arrow button is clicked on the drop-down list is displayed
// If mouse exit's the combo box with the drop-down list displayed the drop-down list
// is asked to capture events
// The drop-down list will capture all events including mouse down and up and will always
// return with ListWasSelected method call regardless of whether an item in the list was
// actually selected.
// The ListWasSelected code will turn off mouse-capture for the drop-down list.
// The drop-down list does not explicitly set capture when it is in the drop-down mode.
//XXX: This is temporary. It simulates psuedo states by using a attribute selector on
const char * kMozDropdownActive = "-moz-dropdown-active";
nsresult
NS_NewComboboxControlFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame, PRUint32 aFlags)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsComboboxControlFrame* it = new (aPresShell) nsComboboxControlFrame;
if (!it) {
return NS_ERROR_OUT_OF_MEMORY;
}
it->SetFlags(aFlags);
*aNewFrame = it;
return NS_OK;
}
nsComboboxControlFrame::nsComboboxControlFrame()
: nsAreaFrame()
{
mPresContext = nsnull;
mFormFrame = nsnull;
mListControlFrame = nsnull;
mTextStr = "";
mDisplayContent = nsnull;
mButtonContent = nsnull;
mDroppedDown = PR_FALSE;
mDisplayFrame = nsnull;
mButtonFrame = nsnull;
mDropdownFrame = nsnull;
mIgnoreFocus = PR_FALSE;
mSelectedIndex = -1;
mCacheSize.width = -1;
mCacheSize.height = -1;
mCachedMaxElementSize.width = -1;
mCachedMaxElementSize.height = -1;
//Shrink the area around it's contents
//SetFlags(NS_BLOCK_SHRINK_WRAP);
}
//--------------------------------------------------------------
nsComboboxControlFrame::~nsComboboxControlFrame()
{
if (mFormFrame) {
mFormFrame->RemoveFormControlFrame(*this);
mFormFrame = nsnull;
}
NS_IF_RELEASE(mPresContext);
NS_IF_RELEASE(mDisplayContent);
NS_IF_RELEASE(mButtonContent);
}
//--------------------------------------------------------------
// Frames are not refcounted, no need to AddRef
NS_IMETHODIMP
nsComboboxControlFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
NS_PRECONDITION(0 != aInstancePtr, "null ptr");
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(kIComboboxControlFrameIID)) {
*aInstancePtr = (void*) ((nsIComboboxControlFrame*) this);
return NS_OK;
} else if (aIID.Equals(kIFormControlFrameIID)) {
*aInstancePtr = (void*) ((nsIFormControlFrame*) this);
return NS_OK;
} else if (aIID.Equals(kIAnonymousContentCreatorIID)) {
*aInstancePtr = (void*)(nsIAnonymousContentCreator*) this;
return NS_OK;
} else if (aIID.Equals(NS_GET_IID(nsISelectControlFrame))) {
*aInstancePtr = (void *)(nsISelectControlFrame*)this;
return NS_OK;
} else if (aIID.Equals(NS_GET_IID(nsIStatefulFrame))) {
*aInstancePtr = (void *)(nsIStatefulFrame*)this;
return NS_OK;
} else if (aIID.Equals(nsCOMTypeInfo<nsIRollupListener>::GetIID())) {
*aInstancePtr = (void*)(nsIRollupListener*)this;
return NS_OK;
}
return nsAreaFrame::QueryInterface(aIID, aInstancePtr);
}
NS_IMETHODIMP
nsComboboxControlFrame::Init(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow)
{
// Need to hold on the pres context because it is used later in methods
// which don't have it passed in.
mPresContext = aPresContext;
NS_ADDREF(mPresContext);
return nsAreaFrame::Init(aPresContext, aContent, aParent, aContext, aPrevInFlow);
}
//--------------------------------------------------------------
PRBool
nsComboboxControlFrame::IsSuccessful(nsIFormControlFrame* aSubmitter)
{
nsAutoString name;
return (NS_CONTENT_ATTR_HAS_VALUE == GetName(&name));
}
// If nothing is selected, and we have options, select item 0
// This is a UI decision that goes against the HTML 4 spec.
// See bugzilla bug 15841 for justification of this deviation.
NS_IMETHODIMP
nsComboboxControlFrame::MakeSureSomethingIsSelected(nsIPresContext* aPresContext)
{
nsIFormControlFrame* fcFrame = nsnull;
nsIFrame* dropdownFrame = GetDropdownFrame();
nsresult rv = dropdownFrame->QueryInterface(kIFormControlFrameIID, (void**)&fcFrame);
if (NS_SUCCEEDED(rv) && fcFrame) {
// If nothing selected, and there are options, default selection to item 0
rv = mListControlFrame->GetSelectedIndex(&mSelectedIndex);
if (NS_SUCCEEDED(rv) && (mSelectedIndex < 0)) {
// Find out if there are any options in the list to select
PRInt32 length = 0;
mListControlFrame->GetNumberOfOptions(&length);
if (length > 0) {
// Set listbox selection to first item in the list box
rv = fcFrame->SetProperty(aPresContext, nsHTMLAtoms::selectedindex, "0");
mSelectedIndex = 0;
}
UpdateSelection(PR_FALSE, PR_TRUE, mSelectedIndex); // Needed to reflow when removing last option
}
// Don't NS_RELEASE fcFrame here as it isn't addRef'd in the QI (???)
}
return rv;
}
// Initialize the text string in the combobox using either the current
// selection in the list box or the first item item in the list box.
void
nsComboboxControlFrame::InitTextStr(nsIPresContext* aPresContext, PRBool aUpdate)
{
MakeSureSomethingIsSelected(aPresContext);
// Update the selected text string
mListControlFrame->GetSelectedItem(mTextStr);
// Update the display by setting the value attribute
mDisplayContent->SetAttribute(kNameSpaceID_None, nsHTMLAtoms::value, mTextStr, aUpdate);
//nsIFrame* buttonFrame = GetDisplayFrame(aPresContext);
//nsFormControlHelper::ForceDrawFrame(buttonFrame);
}
//--------------------------------------------------------------
// Reset the combo box back to it original state.
void
nsComboboxControlFrame::Reset(nsIPresContext* aPresContext)
{
// Reset the dropdown list to its original state
nsIFormControlFrame* fcFrame = nsnull;
nsIFrame* dropdownFrame = GetDropdownFrame();
nsresult result = dropdownFrame->QueryInterface(kIFormControlFrameIID, (void**)&fcFrame);
if ((NS_OK == result) && (nsnull != fcFrame)) {
fcFrame->Reset(aPresContext);
}
// Update the combobox using the text string returned from the dropdown list
InitTextStr(aPresContext, PR_TRUE);
}
void
nsComboboxControlFrame::PostCreateWidget(nsIPresContext* aPresContext,
nscoord& aWidth,
nscoord& aHeight)
{
Reset(aPresContext);
}
//--------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::GetType(PRInt32* aType) const
{
*aType = NS_FORM_SELECT;
return NS_OK;
}
//--------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::GetFormContent(nsIContent*& aContent) const
{
nsIContent* content;
nsresult rv;
rv = GetContent(&content);
aContent = content;
return rv;
}
//--------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::GetFont(nsIPresContext* aPresContext,
nsFont& aFont)
{
nsFormControlHelper::GetFont(this, aPresContext, mStyleContext, aFont);
return NS_OK;
}
//--------------------------------------------------------------
nscoord
nsComboboxControlFrame::GetVerticalBorderWidth(float aPixToTwip) const
{
return 0;
}
//--------------------------------------------------------------
nscoord
nsComboboxControlFrame::GetHorizontalBorderWidth(float aPixToTwip) const
{
return 0;
}
//--------------------------------------------------------------
nscoord
nsComboboxControlFrame::GetVerticalInsidePadding(nsIPresContext* aPresContext,
float aPixToTwip,
nscoord aInnerHeight) const
{
return 0;
}
//--------------------------------------------------------------
nscoord
nsComboboxControlFrame::GetHorizontalInsidePadding(nsIPresContext* aPresContext,
float aPixToTwip,
nscoord aInnerWidth,
nscoord aCharWidth) const
{
return 0;
}
void
nsComboboxControlFrame::SetFocus(PRBool aOn, PRBool aRepaint)
{
//XXX: TODO Implement focus for combobox.
}
void
nsComboboxControlFrame::ScrollIntoView(nsIPresContext* aPresContext)
{
if (aPresContext) {
nsCOMPtr<nsIPresShell> presShell;
aPresContext->GetShell(getter_AddRefs(presShell));
presShell->ScrollFrameIntoView(this,
NS_PRESSHELL_SCROLL_ANYWHERE,NS_PRESSHELL_SCROLL_ANYWHERE);
}
}
void
nsComboboxControlFrame::ShowPopup(PRBool aShowPopup)
{
//XXX: This is temporary. It simulates a psuedo dropdown states by using a attribute selector
// This will not be need if the event state supports active states for use with the dropdown list
// Currently, the event state manager will reset the active state to the content which has focus
// which causes the active state to be removed from the event state manager immediately after it
// it the select is set to the active state.
nsCOMPtr<nsIAtom> activeAtom ( dont_QueryInterface(NS_NewAtom(kMozDropdownActive)));
if (PR_TRUE == aShowPopup) {
mContent->SetAttribute(kNameSpaceID_None, activeAtom, "", PR_TRUE);
} else {
mContent->UnsetAttribute(kNameSpaceID_None, activeAtom, PR_TRUE);
}
}
// Show the dropdown list
void
nsComboboxControlFrame::ShowList(nsIPresContext* aPresContext, PRBool aShowList)
{
nsIWidget * widget = nsnull;
// Get parent view
nsIFrame * listFrame;
if (NS_OK == mListControlFrame->QueryInterface(kIFrameIID, (void **)&listFrame)) {
nsIView * view = nsnull;
listFrame->GetView(aPresContext, &view);
NS_ASSERTION(view != nsnull, "nsComboboxControlFrame view is null");
if (view) {
view->GetWidget(widget);
}
if (nsnull != widget) {
widget->CaptureRollupEvents((nsIRollupListener *)this, !mDroppedDown, PR_TRUE);
NS_RELEASE(widget);
}
}
if (PR_TRUE == aShowList) {
ShowPopup(PR_TRUE);
mDroppedDown = PR_TRUE;
// The listcontrol frame will call back to the nsComboboxControlFrame's ListWasSelected
// which will stop the capture.
mListControlFrame->AboutToDropDown();
mListControlFrame->CaptureMouseEvents(aPresContext, PR_TRUE);
} else {
ShowPopup(PR_FALSE);
mDroppedDown = PR_FALSE;
}
}
//-------------------------------------------------------------
// this is in response to the MouseClick from the containing browse button
// XXX: TODO still need to get filters from accept attribute
void
nsComboboxControlFrame::MouseClicked(nsIPresContext* aPresContext)
{
//ToggleList(aPresContext);
}
nsresult
nsComboboxControlFrame::ReflowComboChildFrame(nsIFrame* aFrame,
nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus,
nscoord aAvailableWidth,
nscoord aAvailableHeight)
{
// Constrain the child's width and height to aAvailableWidth and aAvailableHeight
nsSize availSize(aAvailableWidth, aAvailableHeight);
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, aFrame,
availSize);
kidReflowState.mComputedWidth = aAvailableWidth;
kidReflowState.mComputedHeight = aAvailableHeight;
// Reflow child
nsRect rect;
aFrame->GetRect(rect);
nsresult rv = ReflowChild(aFrame, aPresContext, aDesiredSize, kidReflowState,
rect.x, rect.y, 0, aStatus);
// Set the child's width and height to it's desired size
FinishReflowChild(aFrame, aPresContext, aDesiredSize, rect.x, rect.y, 0);
return rv;
}
// Suggest a size for the child frame.
// Only frames which implement the nsIFormControlFrame interface and
// honor the SetSuggestedSize method will be placed and sized correctly.
void
nsComboboxControlFrame::SetChildFrameSize(nsIFrame* aFrame, nscoord aWidth, nscoord aHeight)
{
nsIFormControlFrame* fcFrame = nsnull;
nsresult result = aFrame->QueryInterface(kIFormControlFrameIID, (void**)&fcFrame);
if (NS_SUCCEEDED(result) && (nsnull != fcFrame)) {
fcFrame->SetSuggestedSize(aWidth, aHeight);
}
}
nsresult
nsComboboxControlFrame::GetPrimaryComboFrame(nsIPresContext* aPresContext, nsIContent* aContent, nsIFrame** aFrame)
{
nsresult rv = NS_OK;
// Get the primary frame from the presentation shell.
nsCOMPtr<nsIPresShell> presShell;
rv = aPresContext->GetShell(getter_AddRefs(presShell));
if (NS_SUCCEEDED(rv) && presShell) {
presShell->GetPrimaryFrameFor(aContent, aFrame);
}
return rv;
}
nsIFrame*
nsComboboxControlFrame::GetButtonFrame(nsIPresContext* aPresContext)
{
if (mButtonFrame == nsnull) {
NS_ASSERTION(mButtonContent != nsnull, "nsComboboxControlFrame mButtonContent is null");
GetPrimaryComboFrame(aPresContext, mButtonContent, &mButtonFrame);
}
return mButtonFrame;
}
nsIFrame*
nsComboboxControlFrame::GetDisplayFrame(nsIPresContext* aPresContext)
{
if (mDisplayFrame == nsnull) {
NS_ASSERTION(mDisplayContent != nsnull, "nsComboboxControlFrame mDisplayContent is null");
GetPrimaryComboFrame(aPresContext, mDisplayContent, &mDisplayFrame);
}
return mDisplayFrame;
}
nsIFrame*
nsComboboxControlFrame::GetDropdownFrame()
{
return mDropdownFrame;
}
nsresult
nsComboboxControlFrame::GetScreenHeight(nsIPresContext* aPresContext,
nscoord& aHeight)
{
aHeight = 0;
nsIDeviceContext* context;
aPresContext->GetDeviceContext( &context );
if ( nsnull != context )
{
PRInt32 height;
PRInt32 width;
context->GetDeviceSurfaceDimensions(width, height);
float devUnits;
context->GetDevUnitsToAppUnits(devUnits);
aHeight = NSToIntRound(float( height) / devUnits );
NS_RELEASE( context );
return NS_OK;
}
return NS_ERROR_FAILURE;
}
int counter = 0;
nsresult
nsComboboxControlFrame::PositionDropdown(nsIPresContext* aPresContext,
nscoord aHeight,
nsRect aAbsoluteTwipsRect,
nsRect aAbsolutePixelRect)
{
// Position the dropdown list. It is positioned below the display frame if there is enough
// room on the screen to display the entire list. Otherwise it is placed above the display
// frame.
// Note: As first glance, it appears that you could simply get the absolute bounding box for the
// dropdown list by first getting it's view, then getting the view's nsIWidget, then asking the nsIWidget
// for it's AbsoluteBounds. The problem with this approach, is that the dropdown lists y location can
// change based on whether the dropdown is placed below or above the display frame.
// The approach, taken here is to get use the absolute position of the display frame and use it's location
// to determine if the dropdown will go offscreen.
// Use the height calculated for the area frame so it includes both
// the display and button heights.
nsresult rv = NS_OK;
nsIFrame* dropdownFrame = GetDropdownFrame();
nscoord dropdownYOffset = aHeight;
// XXX: Enable this code to debug popping up above the display frame, rather than below it
nsRect dropdownRect;
dropdownFrame->GetRect(dropdownRect);
nscoord screenHeightInPixels = 0;
if (NS_SUCCEEDED(GetScreenHeight(aPresContext, screenHeightInPixels))) {
// Get the height of the dropdown list in pixels.
float t2p;
aPresContext->GetTwipsToPixels(&t2p);
nscoord absoluteDropDownHeight = NSTwipsToIntPixels(dropdownRect.height, t2p);
// Check to see if the drop-down list will go offscreen
if (NS_SUCCEEDED(rv) && ((aAbsolutePixelRect.y + aAbsolutePixelRect.height + absoluteDropDownHeight) > screenHeightInPixels)) {
// move the dropdown list up
dropdownYOffset = - (dropdownRect.height);
}
}
dropdownRect.x = 0;
dropdownRect.y = dropdownYOffset;
nsRect currentRect;
dropdownFrame->GetRect(currentRect);
//if (currentRect != dropdownRect) {
dropdownFrame->SetRect(aPresContext, dropdownRect);
#ifdef DEBUG_rodsXXXXXX
printf("%d Position Dropdown at: %d %d %d %d\n", counter++, dropdownRect.x, dropdownRect.y, dropdownRect.width, dropdownRect.height);
#endif
//}
return rv;
}
// Calculate a frame's position in screen coordinates
nsresult
nsComboboxControlFrame::GetAbsoluteFramePosition(nsIPresContext* aPresContext,
nsIFrame *aFrame,
nsRect& aAbsoluteTwipsRect,
nsRect& aAbsolutePixelRect)
{
//XXX: This code needs to take the view's offset into account when calculating
//the absolute coordinate of the frame.
nsresult rv = NS_OK;
aFrame->GetRect(aAbsoluteTwipsRect);
// zero these out,
// because the GetOffsetFromView figures them out
aAbsoluteTwipsRect.x = 0;
aAbsoluteTwipsRect.y = 0;
// Get conversions between twips and pixels
float t2p;
float p2t;
aPresContext->GetTwipsToPixels(&t2p);
aPresContext->GetPixelsToTwips(&p2t);
// Add in frame's offset from it it's containing view
nsIView *containingView = nsnull;
nsPoint offset;
rv = aFrame->GetOffsetFromView(aPresContext, offset, &containingView);
if (NS_SUCCEEDED(rv) && (nsnull != containingView)) {
aAbsoluteTwipsRect.x += offset.x;
aAbsoluteTwipsRect.y += offset.y;
nsPoint viewOffset;
containingView->GetPosition(&viewOffset.x, &viewOffset.y);
nsIView * parent;
containingView->GetParent(parent);
while (nsnull != parent) {
nsPoint po;
parent->GetPosition(&po.x, &po.y);
viewOffset.x += po.x;
viewOffset.y += po.y;
nsIScrollableView * scrollView;
if (NS_OK == containingView->QueryInterface(nsIScrollableView::GetIID(), (void **)&scrollView)) {
nscoord x;
nscoord y;
scrollView->GetScrollPosition(x, y);
viewOffset.x -= x;
viewOffset.y -= y;
}
nsIWidget * widget;
parent->GetWidget(widget);
if (nsnull != widget) {
// Add in the absolute offset of the widget.
nsRect absBounds;
nsRect lc;
widget->WidgetToScreen(lc, absBounds);
// Convert widget coordinates to twips
aAbsoluteTwipsRect.x += NSIntPixelsToTwips(absBounds.x, p2t);
aAbsoluteTwipsRect.y += NSIntPixelsToTwips(absBounds.y, p2t);
NS_RELEASE(widget);
break;
}
parent->GetParent(parent);
}
aAbsoluteTwipsRect.x += viewOffset.x;
aAbsoluteTwipsRect.y += viewOffset.y;
}
// convert to pixel coordinates
if (NS_SUCCEEDED(rv)) {
aAbsolutePixelRect.x = NSTwipsToIntPixels(aAbsoluteTwipsRect.x, t2p);
aAbsolutePixelRect.y = NSTwipsToIntPixels(aAbsoluteTwipsRect.y, t2p);
aAbsolutePixelRect.width = NSTwipsToIntPixels(aAbsoluteTwipsRect.width, t2p);
aAbsolutePixelRect.height = NSTwipsToIntPixels(aAbsoluteTwipsRect.height, t2p);
}
return rv;
}
#ifdef DEBUG_rodsXXX
static int myCounter = 0;
#endif
NS_IMETHODIMP
nsComboboxControlFrame::Reflow(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
#ifdef DEBUG_rodsXXX
printf("****** nsComboboxControlFrame::Reflow %d Reason: ", myCounter++);
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
// XXX Temporary Fix for too many resize reflows
#ifdef OPTIMIZE_RESIZE_RELOW
if (aReflowState.reason == eReflowReason_Resize) {
if (NS_UNCONSTRAINEDSIZE == aReflowState.mComputedWidth &&
NS_UNCONSTRAINEDSIZE == aReflowState.mComputedHeight) {
if (mCacheSize.width > -1 && mCacheSize.height > -1) {
aDesiredSize.width = mCacheSize.width;
aDesiredSize.height = mCacheSize.height;
if (aDesiredSize.maxElementSize != nsnull) {
aDesiredSize.maxElementSize->width = mCachedMaxElementSize.width;
aDesiredSize.maxElementSize->height = mCachedMaxElementSize.height;
}
aDesiredSize.ascent = aDesiredSize.height;
aDesiredSize.descent = 0;
aStatus = NS_FRAME_COMPLETE;
return NS_OK;
}
} else {
if (mCacheSize.width == aReflowState.mComputedWidth &&
mCacheSize.height == aReflowState.mComputedHeight) {
if (aDesiredSize.maxElementSize != nsnull) {
aDesiredSize.maxElementSize->width = mCachedMaxElementSize.width;
aDesiredSize.maxElementSize->height = mCachedMaxElementSize.height;
}
aDesiredSize.ascent = aDesiredSize.height;
aDesiredSize.descent = 0;
aStatus = NS_FRAME_COMPLETE;
return NS_OK;
}
}
}
#endif
nsresult rv = NS_OK;
nsIFrame* buttonFrame = GetButtonFrame(aPresContext);
nsIFrame* displayFrame = GetDisplayFrame(aPresContext);
nsIFrame* dropdownFrame = GetDropdownFrame();
// Don't try to do any special sizing and positioning unless all of the frames
// have been created.
if ((nsnull == displayFrame) ||
(nsnull == buttonFrame) ||
(nsnull == dropdownFrame))
{
// Since combobox frames are missing just do a normal area frame reflow
return nsAreaFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus);
}
// size of each part of the combo box
nsRect displayRect;
nsRect buttonRect;
nsRect dropdownRect;
if (!mFormFrame && (eReflowReason_Initial == aReflowState.reason)) {
nsFormFrame::AddFormControlFrame(aPresContext, *NS_STATIC_CAST(nsIFrame*,this));
}
const nsStyleSpacing* spacing;
GetStyleData(eStyleStruct_Spacing, (const nsStyleStruct *&)spacing);
nsMargin borderPadding;
borderPadding.SizeTo(0, 0, 0, 0);
spacing->CalcBorderPaddingFor(this, borderPadding);
// Get the current sizes of the combo box child frames
displayFrame->GetRect(displayRect);
buttonFrame->GetRect(buttonRect);
dropdownFrame->GetRect(dropdownRect);
nsHTMLReflowState firstPassState(aReflowState);
// Only reflow the display and button if they are the target of
// the incremental reflow, unless they change size. If they do
// then everything needs to be reflowed.
if (eReflowReason_Incremental == firstPassState.reason) {
nsIFrame* targetFrame;
firstPassState.reflowCommand->GetTarget(targetFrame);
if ((targetFrame == buttonFrame) || (targetFrame == displayFrame)) {
nsRect oldDisplayRect = displayRect;
nsRect oldButtonRect = buttonRect;
rv = nsAreaFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus);
// nsAreaFrame::Reflow adds in the border and padding so we need to remove it
if (NS_UNCONSTRAINEDSIZE != firstPassState.mComputedWidth) {
aDesiredSize.width -= borderPadding.left + borderPadding.right;
}
displayFrame->GetRect(displayRect);
buttonFrame->GetRect(buttonRect);
if ((oldDisplayRect == displayRect) && (oldButtonRect == buttonRect)) {
// Reposition the popup.
//nsRect absoluteTwips;
//nsRect absolutePixels;
//GetAbsoluteFramePosition(aPresContext, displayFrame, absoluteTwips, absolutePixels);
//PositionDropdown(aPresContext, displayRect.height, absoluteTwips, absolutePixels);
aStatus = NS_FRAME_COMPLETE;
return rv;
}
}
nsIReflowCommand::ReflowType type;
aReflowState.reflowCommand->GetType(type);
firstPassState.reason = eReflowReason_StyleChange;
firstPassState.reflowCommand = nsnull;
}
//Set the desired size for the button and display frame
if (NS_UNCONSTRAINEDSIZE == firstPassState.mComputedWidth) {
// A width has not been specified for the select so size the display area to
// match the width of the longest item in the drop-down list. The dropdown
// list has already been reflowed and sized to shrink around its contents above.
// Reflow the dropdown shrink-wrapped.
PRBool saveMES = aDesiredSize.maxElementSize != nsnull;
nsSize * maxElementSize = nsnull;
if (saveMES) {
maxElementSize = new nsSize();
//maxElementSize = new nsSize(*aDesiredSize.maxElementSize);
}
nsHTMLReflowMetrics dropdownDesiredSize(maxElementSize);
ReflowComboChildFrame(dropdownFrame, aPresContext, dropdownDesiredSize, firstPassState, aStatus, NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
nsSize size;
PRInt32 length = 0;
mListControlFrame->GetNumberOfOptions(&length);
dropdownFrame->GetRect(dropdownRect);
// Get maximum size and height of a option in the dropdown
mListControlFrame->GetMaximumSize(size);
// Set width of display to match width of the drop down
SetChildFrameSize(displayFrame, dropdownRect.width, size.height);
// the default size of the of scrollbar
// that will be the default width of the dropdown button
// the height will be the height of the text
nsCOMPtr<nsIDeviceContext> dx;
aPresContext->GetDeviceContext(getter_AddRefs(dx));
if (dx) {
float sbWidth;
float sbHeight;
dx->GetScrollBarDimensions(sbWidth, sbHeight);
size.width = (nscoord)sbWidth;
}
// Size the button
SetChildFrameSize(buttonFrame, size.width, size.height);
// Reflow display + button
nsAreaFrame::Reflow(aPresContext, aDesiredSize, firstPassState, aStatus);
displayFrame->GetRect(displayRect);
buttonFrame->GetRect(buttonRect);
buttonRect.y = displayRect.y;
buttonRect.height = displayRect.height;
buttonFrame->SetRect(aPresContext, buttonRect);
// Reflow the dropdown list to match the width of the display + button
ReflowComboChildFrame(dropdownFrame, aPresContext, dropdownDesiredSize, firstPassState, aStatus, aDesiredSize.width, NS_UNCONSTRAINEDSIZE);
dropdownFrame->GetRect(dropdownRect);
if (maxElementSize) {
delete maxElementSize;
}
} else {
// A width has been specified for the select.
// Make the display frame's width + button frame width = the width specified.
nsHTMLReflowMetrics dropdownDesiredSize(aDesiredSize);
ReflowComboChildFrame(dropdownFrame, aPresContext, dropdownDesiredSize, firstPassState, aStatus, NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
// Get unconstrained size of the dropdown list.
nsSize size;
mListControlFrame->GetMaximumSize(size);
// Size the button to be the same height as the displayFrame
SetChildFrameSize(buttonFrame, size.height, size.height);
// Compute display width
// Since the button's width is the same as its height
// we subtract size.height (the width)
nscoord displayWidth = firstPassState.mComputedWidth - size.height;
// nsAreaFrame::Reflow adds in the border and padding so we need to remove it
displayWidth -= borderPadding.left + borderPadding.right;
// Set the displayFrame to match the displayWidth computed above
SetChildFrameSize(displayFrame, displayWidth, size.height);
// Reflow again with the width of the display frame set.
nsAreaFrame::Reflow(aPresContext, aDesiredSize, firstPassState, aStatus);
// nsAreaFrame::Reflow adds in the border and padding so we need to remove it
// XXX rods - this hould not be subtracted in
//aDesiredSize.width -= borderPadding.left + borderPadding.right;
// Reflow the dropdown list to match the width of the display + button
ReflowComboChildFrame(dropdownFrame, aPresContext, dropdownDesiredSize, firstPassState, aStatus, aDesiredSize.width, NS_UNCONSTRAINEDSIZE);
}
nsRect absoluteTwips;
nsRect absolutePixels;
GetAbsoluteFramePosition(aPresContext, this, absoluteTwips, absolutePixels);
PositionDropdown(aPresContext, aDesiredSize.height, absoluteTwips, absolutePixels);
aStatus = NS_FRAME_COMPLETE;
#if 0
COMPARE_QUIRK_SIZE("nsComboboxControlFrame", 56, 22)
#endif
// XXX Temporary Fix for too many resize reflows
#ifdef OPTIMIZE_RESIZE_RELOW
mCacheSize.width = aDesiredSize.width;
mCacheSize.height = aDesiredSize.height;
if (aDesiredSize.maxElementSize != nsnull) {
mCachedMaxElementSize.width = aDesiredSize.maxElementSize->width;
mCachedMaxElementSize.height = aDesiredSize.maxElementSize->height;
}
#endif
return rv;
}
//--------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::GetName(nsString* aResult)
{
nsresult result = NS_FORM_NOTOK;
if (mContent) {
nsIHTMLContent* formControl = nsnull;
result = mContent->QueryInterface(kIHTMLContentIID, (void**)&formControl);
if ((NS_OK == 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
nsComboboxControlFrame::GetMaxNumValues()
{
return 1;
}
/*XXX-REMOVE
PRBool
nsComboboxControlFrame::GetNamesValues(PRInt32 aMaxNumValues, PRInt32& aNumValues,
nsString* aValues, nsString* aNames)
{
nsAutoString name;
nsresult result = GetName(&name);
if ((aMaxNumValues <= 0) || (NS_CONTENT_ATTR_HAS_VALUE != result)) {
return PR_FALSE;
}
// use our name and the text widgets value
aNames[0] = name;
aValues[0] = mTextStr;
aNumValues = 1;
nsresult status = PR_TRUE;
return status;
}
*/
PRBool
nsComboboxControlFrame::GetNamesValues(PRInt32 aMaxNumValues, PRInt32& aNumValues,
nsString* aValues, nsString* aNames)
{
nsIFormControlFrame* fcFrame = nsnull;
nsIFrame* dropdownFrame = GetDropdownFrame();
nsresult result = dropdownFrame->QueryInterface(kIFormControlFrameIID, (void**)&fcFrame);
if ((NS_SUCCEEDED(result)) && (nsnull != fcFrame)) {
return fcFrame->GetNamesValues(aMaxNumValues, aNumValues, aValues, aNames);
}
return PR_FALSE;
}
NS_IMETHODIMP
nsComboboxControlFrame::GetFrameForPoint(nsIPresContext* aPresContext,
const nsPoint& aPoint,
nsIFrame** aFrame)
{
if (nsFormFrame::GetDisabled(this)) {
*aFrame = this;
return NS_OK;
} else {
return nsHTMLContainerFrame::GetFrameForPoint(aPresContext, aPoint, aFrame);
}
return NS_OK;
}
//--------------------------------------------------------------
#ifdef NS_DEBUG
NS_IMETHODIMP
nsComboboxControlFrame::GetFrameName(nsString& aResult) const
{
return MakeFrameName("ComboboxControl", aResult);
}
#endif
//----------------------------------------------------------------------
// nsIComboboxControlFrame
//----------------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::ShowDropDown(PRBool aDoDropDown)
{
if (nsFormFrame::GetDisabled(this)) {
return NS_OK;
}
if (!mDroppedDown && aDoDropDown) {
// XXX Temporary for Bug 19416
nsIFrame* dropdownFrame = GetDropdownFrame();
nsIView * lstView;
dropdownFrame->GetView(mPresContext, &lstView);
if (lstView) {
lstView->IgnoreSetPosition(PR_FALSE);
}
if (mListControlFrame) {
mListControlFrame->SyncViewWithFrame(mPresContext);
}
// XXX Temporary for Bug 19416
if (lstView) {
lstView->IgnoreSetPosition(PR_TRUE);
}
ToggleList(mPresContext);
return NS_OK;
} else if (mDroppedDown && !aDoDropDown) {
ToggleList(mPresContext);
return NS_OK;
}
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsComboboxControlFrame::SetDropDown(nsIFrame* aDropDownFrame)
{
mDropdownFrame = aDropDownFrame;
if (NS_OK != mDropdownFrame->QueryInterface(kIListControlFrameIID, (void**)&mListControlFrame)) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHODIMP
nsComboboxControlFrame::GetDropDown(nsIFrame** aDropDownFrame)
{
if (nsnull == aDropDownFrame) {
return NS_ERROR_FAILURE;
}
*aDropDownFrame = mDropdownFrame;
return NS_OK;
}
NS_IMETHODIMP
nsComboboxControlFrame::ListWasSelected(nsIPresContext* aPresContext)
{
if (aPresContext == nsnull) {
aPresContext = mPresContext;
}
ShowList(aPresContext, PR_FALSE);
mListControlFrame->CaptureMouseEvents(aPresContext, PR_FALSE);
PRInt32 indx;
mListControlFrame->GetSelectedIndex(&indx);
UpdateSelection(PR_TRUE, PR_FALSE, indx);
return NS_OK;
}
// Toggle dropdown list.
NS_IMETHODIMP
nsComboboxControlFrame::ToggleList(nsIPresContext* aPresContext)
{
ShowList(aPresContext, (PR_FALSE == mDroppedDown));
return NS_OK;
}
NS_IMETHODIMP
nsComboboxControlFrame::UpdateSelection(PRBool aDoDispatchEvent, PRBool aForceUpdate, PRInt32 aNewIndex)
{
if (mListControlFrame) {
// Check to see if the selection changed
if (mSelectedIndex != aNewIndex || aForceUpdate) {
mListControlFrame->GetSelectedItem(mTextStr); // Update text box
mListControlFrame->UpdateSelection(aDoDispatchEvent, aForceUpdate, mContent);
}
mSelectedIndex = aNewIndex;
}
return NS_OK;
}
NS_IMETHODIMP
nsComboboxControlFrame::AbsolutelyPositionDropDown()
{
nsRect absoluteTwips;
nsRect absolutePixels;
// XXX Not used nsIFrame* displayFrame = GetDisplayFrame(mPresContext);
nsRect rect;
this->GetRect(rect);
GetAbsoluteFramePosition(mPresContext, this, absoluteTwips, absolutePixels);
PositionDropdown(mPresContext, rect.height, absoluteTwips, absolutePixels);
return NS_OK;
}
NS_IMETHODIMP
nsComboboxControlFrame::GetAbsoluteRect(nsRect* aRect)
{
nsRect absoluteTwips;
nsRect rect;
this->GetRect(rect);
GetAbsoluteFramePosition(mPresContext, this, absoluteTwips, *aRect);
return NS_OK;
}
///////////////////////////////////////////////////////////////
NS_IMETHODIMP
nsComboboxControlFrame::SelectionChanged()
{
// Send reflow command because the new text maybe larger
nsresult rv = NS_OK;
if (mDisplayContent) {
nsCOMPtr<nsIHTMLContent> htmlContent(do_QueryInterface(mDisplayContent, &rv));
if (NS_SUCCEEDED(rv) && htmlContent) {
rv = htmlContent->SetHTMLAttribute(nsHTMLAtoms::value, mTextStr, PR_TRUE);
if (NS_SUCCEEDED(rv)) {
nsIFrame* displayFrame = GetDisplayFrame(mPresContext);
nsIReflowCommand* cmd;
rv = NS_NewHTMLReflowCommand(&cmd, displayFrame, nsIReflowCommand::StyleChanged);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIPresShell> shell;
rv = mPresContext->GetShell(getter_AddRefs(shell));
if (NS_SUCCEEDED(rv) && shell) {
if (NS_SUCCEEDED(shell->EnterReflowLock())) {
shell->AppendReflowCommand(cmd);
shell->ExitReflowLock(PR_TRUE, PR_TRUE);
}
}
NS_RELEASE(cmd);
}
}
}
}
return rv;
}
//----------------------------------------------------------------------
// nsISelectControlFrame
//----------------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::DoneAddingContent(PRBool aIsDone)
{
nsISelectControlFrame* listFrame = nsnull;
nsIFrame* dropdownFrame = GetDropdownFrame();
nsresult rv = dropdownFrame->QueryInterface(NS_GET_IID(nsISelectControlFrame),
(void**)&listFrame);
if (NS_SUCCEEDED(rv) && listFrame) {
rv = listFrame->DoneAddingContent(aIsDone);
NS_RELEASE(listFrame);
}
return rv;
}
NS_IMETHODIMP
nsComboboxControlFrame::AddOption(nsIPresContext* aPresContext, PRInt32 aIndex)
{
nsISelectControlFrame* listFrame = nsnull;
nsIFrame* dropdownFrame = GetDropdownFrame();
nsresult rv = dropdownFrame->QueryInterface(NS_GET_IID(nsISelectControlFrame),
(void**)&listFrame);
if (NS_SUCCEEDED(rv) && listFrame) {
rv = listFrame->AddOption(aPresContext, aIndex);
NS_RELEASE(listFrame);
}
// If we added the first option, we might need to select it.
// We should call MakeSureSomethingIsSelected here, but since it
// it changes selection, which currently causes a reframe, and thus
// deletes the frame out from under the caller, causing a crash. (Bug 17995)
// XXX MakeSureSomethingIsSelected(aPresContext);
return rv;
}
NS_IMETHODIMP
nsComboboxControlFrame::RemoveOption(nsIPresContext* aPresContext, PRInt32 aIndex)
{
nsISelectControlFrame* listFrame = nsnull;
nsIFrame* dropdownFrame = GetDropdownFrame();
nsresult rv = dropdownFrame->QueryInterface(NS_GET_IID(nsISelectControlFrame),
(void**)&listFrame);
if (NS_SUCCEEDED(rv) && listFrame) {
rv = listFrame->RemoveOption(aPresContext, aIndex);
NS_RELEASE(listFrame);
}
// If we removed the selected option, nothing is selected any more.
// Restore selection to option 0 if there are options left.
MakeSureSomethingIsSelected(aPresContext);
return rv;
}
NS_IMETHODIMP
nsComboboxControlFrame::SetOptionSelected(PRInt32 aIndex, PRBool aValue)
{
nsISelectControlFrame* listFrame = nsnull;
nsIFrame* dropdownFrame = GetDropdownFrame();
nsresult rv = dropdownFrame->QueryInterface(NS_GET_IID(nsISelectControlFrame),
(void**)&listFrame);
if (NS_SUCCEEDED(rv) && listFrame) {
rv = listFrame->SetOptionSelected(aIndex, aValue);
NS_RELEASE(listFrame);
}
return rv;
}
NS_IMETHODIMP
nsComboboxControlFrame::GetOptionSelected(PRInt32 aIndex, PRBool* aValue)
{
nsISelectControlFrame* listFrame = nsnull;
nsIFrame* dropdownFrame = GetDropdownFrame();
nsresult rv = dropdownFrame->QueryInterface(NS_GET_IID(nsISelectControlFrame),
(void**)&listFrame);
if (NS_SUCCEEDED(rv) && listFrame) {
rv = listFrame->GetOptionSelected(aIndex, aValue);
NS_RELEASE(listFrame);
}
return rv;
}
NS_IMETHODIMP
nsComboboxControlFrame::HandleEvent(nsIPresContext* aPresContext,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus)
{
NS_ENSURE_ARG_POINTER(aEventStatus);
if (nsEventStatus_eConsumeNoDefault == *aEventStatus) {
return NS_OK;
}
if (nsFormFrame::GetDisabled(this)) {
return NS_OK;
}
return NS_OK;
}
nsresult
nsComboboxControlFrame::RequiresWidget(PRBool& aRequiresWidget)
{
aRequiresWidget = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP
nsComboboxControlFrame::SetProperty(nsIPresContext* aPresContext, nsIAtom* aName, const nsString& aValue)
{
nsIFormControlFrame* fcFrame = nsnull;
nsIFrame* dropdownFrame = GetDropdownFrame();
nsresult result = dropdownFrame->QueryInterface(kIFormControlFrameIID, (void**)&fcFrame);
if ((NS_SUCCEEDED(result)) && (nsnull != fcFrame)) {
return fcFrame->SetProperty(aPresContext, aName, aValue);
}
return result;
}
NS_IMETHODIMP
nsComboboxControlFrame::GetProperty(nsIAtom* aName, nsString& aValue)
{
nsIFormControlFrame* fcFrame = nsnull;
nsIFrame* dropdownFrame = GetDropdownFrame();
nsresult result = dropdownFrame->QueryInterface(kIFormControlFrameIID, (void**)&fcFrame);
if ((NS_SUCCEEDED(result)) && (nsnull != fcFrame)) {
return fcFrame->GetProperty(aName, aValue);
}
return result;
}
NS_IMETHODIMP
nsComboboxControlFrame::CreateAnonymousContent(nsISupportsArray& aChildList)
{
// The frames used to display the combo box and the button used to popup the dropdown list
// are created through anonymous content. The dropdown list is not created through anonymous
// content because it's frame is initialized specifically for the drop-down case and it is placed
// a special list referenced through NS_COMBO_FRAME_POPUP_LIST_INDEX to keep separate from the
// layout of the display and button.
//
// Note: The value attribute of the display content is set when an item is selected in the dropdown list.
// If the content specified below does not honor the value attribute than nothing will be displayed.
// In addition, if the frame created by content below for does not implement the nsIFormControlFrame
// interface and honor the SetSuggestedSize method the placement and size of the display area will not
// match what is normally desired for a combobox.
// For now the content that is created corresponds to two input buttons. It would be better to create the
// tag as something other than input, but then there isn't any way to create a button frame since it
// isn't possible to set the display type in CSS2 to create a button frame.
// create content used for display
//nsIAtom* tag = NS_NewAtom("mozcombodisplay");
nsIAtom* tag = NS_NewAtom("input");
NS_NewHTMLInputElement(&mDisplayContent, tag);
//NS_ADDREF(mDisplayContent);
mDisplayContent->SetAttribute(kNameSpaceID_None, nsHTMLAtoms::type, nsAutoString("button"), PR_FALSE);
//XXX: Do not use nsHTMLAtoms::id use nsHTMLAtoms::kClass instead. There will end up being multiple
//ids set to the same value which is illegal.
mDisplayContent->SetAttribute(kNameSpaceID_None, nsHTMLAtoms::id, nsAutoString("-moz-display"), PR_FALSE);
// This is
mDisplayContent->SetAttribute(kNameSpaceID_None, nsHTMLAtoms::value, nsAutoString("X"), PR_TRUE);
aChildList.AppendElement(mDisplayContent);
// create button which drops the list down
NS_NewHTMLInputElement(&mButtonContent, tag);
//NS_ADDREF(mButtonContent);
mButtonContent->SetAttribute(kNameSpaceID_None, nsHTMLAtoms::type, nsAutoString("button"), PR_FALSE);
aChildList.AppendElement(mButtonContent);
NS_RELEASE(tag);
return NS_OK;
}
NS_IMETHODIMP
nsComboboxControlFrame::SetSuggestedSize(nscoord aWidth, nscoord aHeight)
{
return NS_OK;
}
NS_IMETHODIMP
nsComboboxControlFrame::Destroy(nsIPresContext* aPresContext)
{
// Cleanup frames in popup child list
mPopupFrames.DestroyFrames(aPresContext);
return nsAreaFrame::Destroy(aPresContext);
}
NS_IMETHODIMP
nsComboboxControlFrame::FirstChild(nsIAtom* aListName,
nsIFrame** aFirstChild) const
{
if (nsLayoutAtoms::popupList == aListName) {
*aFirstChild = mPopupFrames.FirstChild();
} else {
nsAreaFrame::FirstChild(aListName, aFirstChild);
}
return NS_OK;
}
NS_IMETHODIMP
nsComboboxControlFrame::SetInitialChildList(nsIPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList)
{
nsresult rv = NS_OK;
if (nsLayoutAtoms::popupList == aListName) {
mPopupFrames.SetFrames(aChildList);
} else {
rv = nsAreaFrame::SetInitialChildList(aPresContext, aListName, aChildList);
InitTextStr(aPresContext, PR_FALSE);
}
return rv;
}
NS_IMETHODIMP
nsComboboxControlFrame::GetAdditionalChildListName(PRInt32 aIndex,
nsIAtom** aListName) const
{
// Maintain a seperate child list for the dropdown list (i.e. popup listbox)
// This is necessary because we don't want the listbox to be included in the layout
// of the combox's children because it would take up space, when it is suppose to
// be floating above the display.
NS_PRECONDITION(nsnull != aListName, "null OUT parameter pointer");
if (aIndex <= NS_AREA_FRAME_ABSOLUTE_LIST_INDEX) {
return nsAreaFrame::GetAdditionalChildListName(aIndex, aListName);
}
*aListName = nsnull;
if (NS_COMBO_FRAME_POPUP_LIST_INDEX == aIndex) {
*aListName = nsLayoutAtoms::popupList;
NS_ADDREF(*aListName);
}
return NS_OK;
}
PRIntn
nsComboboxControlFrame::GetSkipSides() const
{
// Don't skip any sides during border rendering
return 0;
}
//----------------------------------------------------------------------
//nsIRollupListener
//----------------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::Rollup()
{
if (mDroppedDown) {
mListControlFrame->AboutToRollup();
ShowDropDown(PR_FALSE);
mListControlFrame->CaptureMouseEvents(mPresContext, PR_FALSE);
}
return NS_OK;
}
//----------------------------------------------------------------------
// nsIStatefulFrame
// XXX Do we need to implement this here? It is already implemented in
// the ListControlFrame, our child...
//----------------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::GetStateType(nsIPresContext* aPresContext,
nsIStatefulFrame::StateType* aStateType)
{
*aStateType = nsIStatefulFrame::eSelectType;
return NS_OK;
}
NS_IMETHODIMP
nsComboboxControlFrame::SaveState(nsIPresContext* aPresContext, nsISupports** aState)
{
if (!mListControlFrame) return NS_ERROR_UNEXPECTED;
nsIStatefulFrame* sFrame = nsnull;
nsresult res = mListControlFrame->QueryInterface(NS_GET_IID(nsIStatefulFrame),
(void**)&sFrame);
if (NS_SUCCEEDED(res) && sFrame) {
res = sFrame->SaveState(aPresContext, aState);
NS_RELEASE(sFrame);
}
return res;
}
NS_IMETHODIMP
nsComboboxControlFrame::RestoreState(nsIPresContext* aPresContext, nsISupports* aState)
{
if (!mListControlFrame) return NS_ERROR_UNEXPECTED;
nsIStatefulFrame* sFrame = nsnull;
nsresult res = mListControlFrame->QueryInterface(NS_GET_IID(nsIStatefulFrame),
(void**)&sFrame);
if (NS_SUCCEEDED(res) && sFrame) {
res = sFrame->RestoreState(aPresContext, aState);
NS_RELEASE(sFrame);
}
return res;
}
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