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Mozilla/mozilla/layout/forms/nsComboboxControlFrame.cpp
kmcclusk%netscape.com 4b50dd6645 bug #3547- Modified nsFileControlFrame.cpp to call nsFormFrame::AddFormControlFrame. 
bug #5589. Selection area is now calculated using the inherited Reflow rather
than using the calculations used for the native listbox control.
Fixed varous other rendering bugs related to frame-based listboxes.
bug #2797. GetSize is no longer needed in nsListControlFrame and it has been removed.
Fixed frame-based combobox nsComboboxFrame so that will set it's label to the
first option in the drop-down list if a default value has not been specified.
Added optgroup style rules to ua.css. Opt groups now render, but there are remaining
problems with selection.
Modified nsButtonControlFrame::Reflow to call nsFormFrame::AddFormControlFrame.
This fixes a bug where Gfx-rendered submit button's were not working.
Refactored code in nsListControlFrame in preparation for supporting option groups.
Refactored selection code into SingleSelect and MultiSelect paths.
Removed unused code in nsListControlFrame.
Removed mSelectedFrame member variable. It is no longer needed.
Fixed nsListControlFrame::SetProperty so that it will toggle the selection in a
single select listbox.


git-svn-id: svn://10.0.0.236/trunk@30740 18797224-902f-48f8-a5cc-f745e15eee43
1999-05-07 20:30:16 +00:00

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29 KiB
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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 "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "nsCOMPtr.h"
#include "nsComboboxControlFrame.h"
#include "nsFormFrame.h"
#include "nsButtonControlFrame.h"
#include "nsTextControlFrame.h"
#include "nsIContent.h"
#include "prtypes.h"
#include "nsIAtom.h"
#include "nsIPresContext.h"
#include "nsIHTMLContent.h"
#include "nsHTMLIIDs.h"
#include "nsHTMLAtoms.h"
#include "nsIFileWidget.h"
#include "nsITextWidget.h"
#include "nsWidgetsCID.h"
#include "nsIComponentManager.h"
#include "nsIView.h"
#include "nsHTMLParts.h"
#include "nsIDOMHTMLInputElement.h"
#include "nsIFormControl.h"
#include "nsINameSpaceManager.h"
#include "nsITextContent.h"
// Used for Paint
#include "nsCSSRendering.h"
#include "nsIDeviceContext.h"
#include "nsIPresShell.h"
#include "nsIView.h"
#include "nsIViewManager.h"
#include "nsViewsCID.h"
#include "nsIDOMElement.h"
#include "nsListControlFrame.h"
#include "nsIListControlFrame.h"
#include "nsIDOMHTMLCollection.h"
#include "nsIDOMHTMLSelectElement.h"
#include "nsIDOMHTMLOptionElement.h"
static NS_DEFINE_IID(kViewCID, NS_VIEW_CID);
static NS_DEFINE_IID(kIViewIID, NS_IVIEW_IID);
static NS_DEFINE_IID(kCFileWidgetCID, NS_FILEWIDGET_CID);
static NS_DEFINE_IID(kIFileWidgetIID, NS_IFILEWIDGET_IID);
static NS_DEFINE_IID(kITextWidgetIID, NS_ITEXTWIDGET_IID);
static NS_DEFINE_IID(kIFormControlFrameIID, NS_IFORMCONTROLFRAME_IID);
static NS_DEFINE_IID(kIComboboxControlFrameIID, NS_ICOMBOBOXCONTROLFRAME_IID);
static NS_DEFINE_IID(kIDOMHTMLSelectElementIID, NS_IDOMHTMLSELECTELEMENT_IID);
static NS_DEFINE_IID(kIDOMHTMLOptionElementIID, NS_IDOMHTMLOPTIONELEMENT_IID);
static NS_DEFINE_IID(kIListControlFrameIID, NS_ILISTCONTROLFRAME_IID);
nsresult
NS_NewComboboxControlFrame(nsIFrame*& aResult)
{
aResult = new nsComboboxControlFrame;
if (nsnull == aResult) {
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
nsComboboxControlFrame::nsComboboxControlFrame()
: nsHTMLContainerFrame()
{
mFormFrame = nsnull;
mListFrame = nsnull;
mListControlFrame = nsnull;
mPlaceHolderFrame = nsnull;
mVisibleStyleContext = nsnull;
mHiddenStyleContext = nsnull;
mCurrentStyleContext = nsnull;
mBlockTextStyle = nsnull;
mBlockTextSelectedStyle = nsnull;
mBlockTextSelectedFocusStyle = nsnull;
mFirstTime = PR_TRUE;
mGotFocus = PR_FALSE;
}
//--------------------------------------------------------------
nsComboboxControlFrame::~nsComboboxControlFrame()
{
NS_IF_RELEASE(mVisibleStyleContext);
NS_IF_RELEASE(mHiddenStyleContext);
NS_IF_RELEASE(mBlockTextStyle);
mFormFrame = nsnull;
}
//--------------------------------------------------------------
nsresult
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;
}
if (aIID.Equals(kIFormControlFrameIID)) {
*aInstancePtr = (void*) ((nsIFormControlFrame*) this);
return NS_OK;
}
return nsHTMLContainerFrame::QueryInterface(aIID, aInstancePtr);
}
//--------------------------------------------------------------
PRBool
nsComboboxControlFrame::IsSuccessful(nsIFormControlFrame* aSubmitter)
{
nsAutoString name;
return (NS_CONTENT_ATTR_HAS_VALUE == GetName(&name));
}
// 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()
{
// Update the selected text string
mListControlFrame->GetSelectedItem(mTextStr);
if (mTextStr == "") {
// No selection so use the first item in the list box
nsIFormControlFrame* fcFrame = nsnull;
nsresult result = mListFrame->QueryInterface(kIFormControlFrameIID, (void**)&fcFrame);
if ((NS_OK == result) && (nsnull != fcFrame)) {
// Set listbox selection to first item in the list box
fcFrame->SetProperty(nsHTMLAtoms::selectedindex, "0");
// Get the listbox selection as a string
mListControlFrame->GetSelectedItem(mTextStr);
}
}
}
//--------------------------------------------------------------
void
nsComboboxControlFrame::Reset()
{
SetFocus(PR_TRUE, PR_TRUE);
nsIFormControlFrame* fcFrame = nsnull;
nsresult result = mListFrame->QueryInterface(kIFormControlFrameIID, (void**)&fcFrame);
if ((NS_OK == result) && (nsnull != fcFrame)) {
fcFrame->Reset();
}
InitTextStr();
}
void
nsComboboxControlFrame::PostCreateWidget(nsIPresContext* aPresContext,
nscoord& aWidth,
nscoord& aHeight)
{
Reset();
}
//--------------------------------------------------------------
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 NSIntPixelsToTwips(3, aPixToTwip);
}
//--------------------------------------------------------------
nscoord
nsComboboxControlFrame::GetHorizontalBorderWidth(float aPixToTwip) const
{
return GetVerticalBorderWidth(aPixToTwip);
}
//--------------------------------------------------------------
nscoord
nsComboboxControlFrame::GetVerticalInsidePadding(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 Make set focus work
//mContent->SetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::kClass, "SELECTED", PR_TRUE);
mGotFocus = aOn;
if (aRepaint) {
nsFormControlHelper::ForceDrawFrame(this);
}
}
//--------------------------------------------------------------
// 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)
{
if (nsnull != mListControlFrame) {
//XXX: Make this work SetFocus(PR_FALSE, PR_TRUE);
mCurrentStyleContext = (mCurrentStyleContext == mHiddenStyleContext ? mVisibleStyleContext : mHiddenStyleContext);
if (mCurrentStyleContext == mVisibleStyleContext) {
mListControlFrame->AboutToDropDown();
nsIFormControlFrame* fcFrame = nsnull;
nsresult result = mListFrame->QueryInterface(kIFormControlFrameIID, (void**)&fcFrame);
if ((NS_OK == result) && (nsnull != fcFrame)) {
//XXX: Make this work fcFrame->SetFocus(PR_TRUE, PR_FALSE);
}
} else {
//XXX: Make this work SetFocus(PR_TRUE, PR_TRUE);
}
//XXX: This should not be necessary. Need to restructure the combo box as follows:
// Derive nsComboboxFrame from nsAreaFrame. Attach the placeholder frame, a label frame and
// a button frame. Override reresolve style context and reresolve the style on the ListBox.
// The event state manager should then be asked to set active and non-active based on
// The mouse click this would get rid of all of the ugly code here. The setting of the active
// Should cause re-resolution of the AreaFrame which will re-sync it. KMM.
mListFrame->ReResolveStyleContext(aPresContext, mCurrentStyleContext, NS_STYLE_HINT_NONE, nsnull, nsnull);
// Resync view with frame.
const nsStyleDisplay* disp = (const
nsStyleDisplay*)mCurrentStyleContext->GetStyleData(eStyleStruct_Display);
nsIView * view;
mListFrame->GetView(&view);
if (view) {
view->SetVisibility(NS_STYLE_VISIBILITY_HIDDEN == disp->mVisible ?
nsViewVisibility_kHide:nsViewVisibility_kShow);
}
nsFormControlHelper::ForceDrawFrame(mListFrame);
//XXX: End of the ugly code.
}
}
//--------------------------------------------------------------
NS_IMETHODIMP nsComboboxControlFrame::Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
// XXX Combo box should be changed to be implemented as a label and button frame.
// This would eliminate all of this Reflow code. KMM
// add ourself as an nsIFormControlFrame
if (!mFormFrame && (eReflowReason_Initial == aReflowState.reason)) {
nsFormFrame::AddFormControlFrame(aPresContext, *this);
}
if (mFirstTime) {
ReResolveStyleContext(&aPresContext, mStyleContext, NS_STYLE_HINT_REFLOW, nsnull, nsnull); // XXX This temporary
mListFrame->ReResolveStyleContext(&aPresContext, mCurrentStyleContext, NS_STYLE_HINT_REFLOW, nsnull, nsnull);
mFirstTime = PR_FALSE;
InitTextStr();
}
PRInt32 numChildren = mFrames.GetLength();
if (1 == numChildren) {
nsIAtom * textBlockContentPseudo = NS_NewAtom(":combobox-text");
aPresContext.ResolvePseudoStyleContextFor(mContent, textBlockContentPseudo,
mStyleContext, PR_FALSE,
&mBlockTextStyle);
NS_RELEASE(textBlockContentPseudo);
// XXX This code should move to Init(), someday when the frame construction
// changes are all done and Init() is always getting called...
/*PRBool disabled = */nsFormFrame::GetDisabled(this);
}
nsIDOMHTMLSelectElement* select = nsListControlFrame::GetSelect(mContent);
if (!select) {
return NS_OK;
}
nsIDOMHTMLCollection* options = nsListControlFrame::GetOptions(mContent, select);
if (!options) {
NS_RELEASE(select);
return NS_OK;
}
// get the css size
nsSize styleSize;
nsFormControlFrame::GetStyleSize(aPresContext, aReflowState, styleSize);
// get the size of the longest option
PRInt32 maxWidth = 1;
PRUint32 numOptions;
options->GetLength(&numOptions);
for (PRUint32 i = 0; i < numOptions; i++) {
nsIDOMHTMLOptionElement* option = nsListControlFrame::GetOption(*options, i);
if (option) {
nsAutoString text;
if (NS_CONTENT_ATTR_HAS_VALUE != option->GetText(text)) {
continue;
}
nsSize textSize;
// use the style for the select rather that the option, since widgets don't support it
nsFormControlHelper::GetTextSize(aPresContext, this, text, textSize, aReflowState.rendContext);
if (textSize.width > maxWidth) {
maxWidth = textSize.width;
}
NS_RELEASE(option);
}
}
PRInt32 rowHeight = 0;
nsSize desiredSize;
nsSize minSize;
PRBool widthExplicit, heightExplicit;
nsInputDimensionSpec textSpec(nsnull, PR_FALSE, nsnull, nsnull,
maxWidth, PR_TRUE, nsHTMLAtoms::size, 1);
// XXX fix CalculateSize to return PRUint32
PRUint32 numRows =
(PRUint32)nsFormControlHelper::CalculateSize(&aPresContext, aReflowState.rendContext, this,
styleSize, textSpec, desiredSize, minSize,
widthExplicit, heightExplicit, rowHeight);
float sp2t;
float p2t;
aPresContext.GetPixelsToTwips(&p2t);
aPresContext.GetScaledPixelsToTwips(&sp2t);
nscoord onePixel = NSIntPixelsToTwips(1, sp2t);
nscoord extra = desiredSize.height - (rowHeight * numRows);
numRows = (numOptions > 20 ? 20 : numOptions);
desiredSize.height = (numRows * rowHeight) + extra;
aDesiredSize.descent = 0;
nsMargin border;
const nsStyleSpacing* mySpacing = (const nsStyleSpacing*)mStyleContext->GetStyleData(eStyleStruct_Spacing);
mySpacing->CalcBorderFor(this, border);
float scale;
float sbWidth;
float sbHeight;
nsCOMPtr<nsIDeviceContext> context;
aPresContext.GetDeviceContext(getter_AddRefs(context));
context->GetCanonicalPixelScale(scale);
context->GetScrollBarDimensions(sbWidth, sbHeight);
PRInt32 scrollbarScaledWidth = PRInt32(sbWidth * scale);
nsFont font(aPresContext.GetDefaultFixedFontDeprecated());
SystemAttrStruct sis;
sis.mFont = &font;
context->GetSystemAttribute(eSystemAttr_Font_Tooltips, &sis);
//XXX: This 14 pixel hardcode value here is bad. The style system should control
//everyting. KMM
nscoord horKludgeAdjustment = NSIntPixelsToTwips(14, p2t);
nscoord horAdjustment = scrollbarScaledWidth + border.left + border.right + horKludgeAdjustment;
aDesiredSize.width = desiredSize.width + horAdjustment;
nscoord verKludgeAdjustment = onePixel;
nscoord verAdjustment = border.top + border.bottom + verKludgeAdjustment;
aDesiredSize.height = rowHeight + verAdjustment;
mButtonRect.SetRect(aDesiredSize.width-scrollbarScaledWidth-border.right, border.top,
scrollbarScaledWidth, aDesiredSize.height - verAdjustment);
if (nsnull != aDesiredSize.maxElementSize) {
aDesiredSize.maxElementSize->width = minSize.width + verAdjustment;
aDesiredSize.maxElementSize->height = minSize.height + horAdjustment;
}
nsRect frameRect;
GetRect(frameRect);
nsRect curRect;
mPlaceHolderFrame->GetRect(curRect);
curRect.x = 0;
curRect.y = frameRect.y + aDesiredSize.height;
mPlaceHolderFrame->SetRect(curRect);
mListFrame->GetRect(frameRect);
aDesiredSize.ascent = aDesiredSize.height;
aDesiredSize.descent = 0;
aStatus = NS_FRAME_COMPLETE;
return NS_OK;
}
//------------------------------------------------------------------------------
void
nsComboboxControlFrame::PaintComboboxControl(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer)
{
//XXX Combo box should be changed to be implemented as a label and button frame.
//This would eliminate all of this rendering code. KMM
const nsStyleDisplay* disp = (const nsStyleDisplay*)mStyleContext->GetStyleData(eStyleStruct_Display);
if (!disp->mVisible) {
return;
}
aRenderingContext.PushState();
const nsStyleColor* myColor = (const nsStyleColor*)mStyleContext->GetStyleData(eStyleStruct_Color);
const nsStyleSpacing* mySpacing = (const nsStyleSpacing*)mStyleContext->GetStyleData(eStyleStruct_Spacing);
const nsStyleFont* myFont = (const nsStyleFont*)mStyleContext->GetStyleData(eStyleStruct_Font);
nsIStyleContext * blkStyle;
if (mGotFocus) {
blkStyle = mTextStr.Length() > 0?mBlockTextSelectedFocusStyle:mBlockTextStyle;
} else {
blkStyle = mTextStr.Length() > 0?mBlockTextSelectedStyle:mBlockTextStyle;
}
const nsStyleColor* blkColor = (const nsStyleColor*)blkStyle->GetStyleData(eStyleStruct_Color);
const nsStyleSpacing* blkSpacing = (const nsStyleSpacing*)blkStyle->GetStyleData(eStyleStruct_Spacing);
// const nsStyleFont* blkFont = (const nsStyleFont*)blkStyle->GetStyleData(eStyleStruct_Font);
nsRect rect(0, 0, mRect.width, mRect.height);
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *myColor, *mySpacing, 0, 0);
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *mySpacing, mStyleContext, 0);
nsHTMLContainerFrame::Paint(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
const nsStyleSpacing* spacing =(const nsStyleSpacing*)mStyleContext->GetStyleData(eStyleStruct_Spacing);
nsMargin border;
spacing->CalcBorderFor(this, border);
float p2t;
aPresContext.GetScaledPixelsToTwips(&p2t);
nscoord onePixel = NSIntPixelsToTwips(1, p2t);
nsRect outside(0, 0, mRect.width, mRect.height);
outside.Deflate(border);
nsRect inside(outside);
outside.Deflate(onePixel, onePixel);
aRenderingContext.SetColor(blkColor->mBackgroundColor);
aRenderingContext.FillRect(inside.x, inside.y, inside.width, inside.height);
float appUnits;
float devUnits;
float scale;
nsIDeviceContext * context;
aRenderingContext.GetDeviceContext(context);
context->GetCanonicalPixelScale(scale);
context->GetAppUnitsToDevUnits(devUnits);
context->GetDevUnitsToAppUnits(appUnits);
float sbWidth;
float sbHeight;
context->GetScrollBarDimensions(sbWidth, sbHeight);
PRInt32 scrollbarScaledWidth = PRInt32(sbWidth * scale);
PRInt32 scrollbarScaledHeight = PRInt32(sbWidth * scale);
nsFont font(aPresContext.GetDefaultFixedFontDeprecated());
GetFont(&aPresContext, font);
aRenderingContext.SetFont(myFont->mFont);
inside.width -= scrollbarScaledWidth;
PRBool clipEmpty;
aRenderingContext.PushState();
aRenderingContext.SetClipRect(inside, nsClipCombine_kReplace, clipEmpty);
nscoord x = inside.x + (onePixel * 4);
nscoord y = inside.y;
aRenderingContext.SetColor(blkColor->mColor);
aRenderingContext.DrawString(mTextStr, x, y);
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
aDirtyRect, inside, *blkSpacing, blkStyle, 0);
aRenderingContext.PopState(clipEmpty);
inside.width -= scrollbarScaledWidth;
inside.height -= scrollbarScaledHeight;
const nsStyleSpacing* arrowSpacing = (const nsStyleSpacing*)mArrowStyle->GetStyleData(eStyleStruct_Spacing);
nsRect srect(0,0,0,0);
srect = mButtonRect;
nsFormControlHelper::PaintArrow(nsFormControlHelper::eArrowDirection_Down, aRenderingContext,aPresContext,
aDirtyRect, srect, onePixel, mArrowStyle, *arrowSpacing, this, mRect);
NS_RELEASE(context);
PRBool status;
aRenderingContext.PopState(status);
}
NS_METHOD
nsComboboxControlFrame::Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer)
{
if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer) {
PaintComboboxControl(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
}
return NS_OK;
}
//--------------------------------------------------------------
PRIntn
nsComboboxControlFrame::GetSkipSides() const
{
return 0;
}
//--------------------------------------------------------------
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;
}
//--------------------------------------------------------------
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;
}
//--------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::GetFrameName(nsString& aResult) const
{
return MakeFrameName("ComboboxControl", aResult);
}
void
nsComboboxControlFrame::RefreshStyleContext(nsIPresContext* aPresContext,
nsIAtom * aNewContentPseudo,
nsIStyleContext*& aCurrentStyle,
nsIContent * aContent,
nsIStyleContext* aParentStyle)
{
nsIStyleContext* newStyleContext;
aPresContext->ProbePseudoStyleContextFor(aContent,
aNewContentPseudo,
aParentStyle,
PR_FALSE,
&newStyleContext);
if (newStyleContext != aCurrentStyle) {
NS_IF_RELEASE(aCurrentStyle);
aCurrentStyle = newStyleContext;
} else {
NS_IF_RELEASE(newStyleContext);
}
}
NS_IMETHODIMP
nsComboboxControlFrame::ReResolveStyleContext(nsIPresContext* aPresContext,
nsIStyleContext* aParentContext,
PRInt32 aParentChange,
nsStyleChangeList* aChangeList,
PRInt32* aLocalChange)
{
// NOTE: using nsFrame's ReResolveStyleContext method to avoid
// useless version in base classes.
PRInt32 ourChange = aParentChange;
nsresult rv = nsHTMLContainerFrame::ReResolveStyleContext(aPresContext, aParentContext,
ourChange, aChangeList, &ourChange);
if (NS_FAILED(rv)) {
return rv;
}
if (aLocalChange) {
*aLocalChange = ourChange;
}
if (NS_COMFALSE != rv) {
PRInt32 childChange;
PRBool currentIsVisible = (mCurrentStyleContext == mVisibleStyleContext?PR_TRUE:PR_FALSE);
RefreshStyleContext(aPresContext, nsHTMLAtoms::dropDownVisible, mVisibleStyleContext, mContent, mStyleContext);
RefreshStyleContext(aPresContext, nsHTMLAtoms::dropDownHidden, mHiddenStyleContext, mContent, mStyleContext);
mCurrentStyleContext = (currentIsVisible?mVisibleStyleContext:mHiddenStyleContext);
mListFrame->ReResolveStyleContext(aPresContext,
(nsnull != mCurrentStyleContext? mCurrentStyleContext : mStyleContext),
ourChange, aChangeList, &childChange);
// Button Style
RefreshStyleContext(aPresContext, nsHTMLAtoms::dropDownBtnOut, mBtnOutStyleContext, mContent, mStyleContext);
RefreshStyleContext(aPresContext, nsHTMLAtoms::dropDownBtnPressed, mBtnPressedStyleContext, mContent, mStyleContext);
//Need to reset the mArrowStyle here, otherwise it might end up pointing
//to memory that has been freed, by the RefreshStyleContext above.
mArrowStyle = mBtnOutStyleContext;
nsIAtom * txtBlkContentPseudo = NS_NewAtom(":combobox-text");
RefreshStyleContext(aPresContext, txtBlkContentPseudo, mBlockTextStyle, mContent, mStyleContext);
NS_IF_RELEASE(txtBlkContentPseudo);
nsIAtom * txtBlkSelContentPseudo = NS_NewAtom(":combobox-textselected");
RefreshStyleContext(aPresContext, txtBlkSelContentPseudo, mBlockTextSelectedStyle, mContent, mStyleContext);
NS_IF_RELEASE(txtBlkSelContentPseudo);
nsIAtom * txtBlkSelFocContentPseudo = NS_NewAtom(":combobox-textselectedfocus");
RefreshStyleContext(aPresContext, txtBlkSelFocContentPseudo, mBlockTextSelectedFocusStyle, mContent, mStyleContext);
NS_IF_RELEASE(txtBlkSelFocContentPseudo);
}
return rv;
}
//----------------------------------------------------------------------
NS_IMETHODIMP nsComboboxControlFrame::HandleEvent(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus)
{
if (aEvent->message == NS_MOUSE_EXIT) {
if (mArrowStyle == mBtnPressedStyleContext) {
mListControlFrame->CaptureMouseEvents(PR_TRUE);
}
}
if (nsEventStatus_eConsumeNoDefault == aEventStatus) {
return NS_OK;
}
if(nsEventStatus_eConsumeNoDefault != aEventStatus) {
if (aEvent->message == NS_MOUSE_LEFT_BUTTON_DOWN) {
} else if (aEvent->message == NS_MOUSE_MOVE && mDoingSelection ||
aEvent->message == NS_MOUSE_LEFT_BUTTON_UP) {
// no-op
} else {
return NS_OK;
}
aEventStatus = nsEventStatus_eConsumeNoDefault;
if (aEvent->message == NS_MOUSE_LEFT_BUTTON_UP) {
mArrowStyle = mBtnOutStyleContext;
nsFormControlHelper::ForceDrawFrame(this);
} else if (aEvent->message == NS_MOUSE_LEFT_BUTTON_DOWN) {
mArrowStyle = mBtnPressedStyleContext;
nsFormControlHelper::ForceDrawFrame(this);
MouseClicked(&aPresContext);
}
}
return NS_OK;
}
//----------------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::GetFrameForPoint(const nsPoint& aPoint, nsIFrame** aFrame)
{
*aFrame = this;
return NS_OK;
}
//----------------------------------------------------------------------
// nsIComboboxControlFrame
//----------------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::SetDropDown(nsIFrame* aPlaceHolderFrame, nsIFrame* aDropDownFrame)
{
mPlaceHolderFrame = aPlaceHolderFrame;
mListFrame = aDropDownFrame;
if (NS_OK != mListFrame->QueryInterface(kIListControlFrameIID, (void**)&mListControlFrame)) {
return NS_ERROR_FAILURE;
}
// Ok, since we now know we have the ListFrame, and we are assuming at this point it has been initialized
// Let's get the currently selected item, but we make the call using the Interface
mListControlFrame->GetSelectedItem(mTextStr);
return NS_OK;
}
//--------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::SetDropDownStyleContexts(nsIStyleContext * aVisible, nsIStyleContext * aHidden)
{
mVisibleStyleContext = aVisible;
mHiddenStyleContext = aHidden;
mCurrentStyleContext = mHiddenStyleContext;
NS_ADDREF(mVisibleStyleContext);
NS_ADDREF(mHiddenStyleContext);
return NS_OK;
}
//--------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::SetButtonStyleContexts(nsIStyleContext * aOut, nsIStyleContext * aPressed)
{
mBtnOutStyleContext = aOut;
mBtnPressedStyleContext = aPressed;
mArrowStyle = aOut;
NS_ADDREF(mBtnOutStyleContext);
NS_ADDREF(mBtnPressedStyleContext);
return NS_OK;
}
//--------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::ListWasSelected(nsIPresContext* aPresContext)
{
mArrowStyle = mBtnOutStyleContext;
MouseClicked(aPresContext);
nsString str;
if (nsnull != mListControlFrame) {
mListControlFrame->GetSelectedItem(mTextStr);
nsIFormControlFrame* fcFrame = nsnull;
nsresult result = mListFrame->QueryInterface(kIFormControlFrameIID, (void**)&fcFrame);
if ((NS_OK == result) && (nsnull != fcFrame)) {
fcFrame->SetFocus(PR_FALSE, PR_FALSE);
}
SetFocus(PR_TRUE, PR_TRUE);
}
return NS_OK;
}
nsresult nsComboboxControlFrame::RequiresWidget(PRBool& aRequiresWidget)
{
aRequiresWidget = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP nsComboboxControlFrame::SetProperty(nsIAtom* aName, const nsString& aValue)
{
nsIFormControlFrame* fcFrame = nsnull;
nsresult result = mListFrame->QueryInterface(kIFormControlFrameIID, (void**)&fcFrame);
if ((NS_SUCCEEDED(result)) && (nsnull != fcFrame)) {
return fcFrame->SetProperty(aName, aValue);
}
return result;
}
NS_IMETHODIMP nsComboboxControlFrame::GetProperty(nsIAtom* aName, nsString& aValue)
{
nsIFormControlFrame* fcFrame = nsnull;
nsresult result = mListFrame->QueryInterface(kIFormControlFrameIID, (void**)&fcFrame);
if ((NS_SUCCEEDED(result)) && (nsnull != fcFrame)) {
return fcFrame->GetProperty(aName, aValue);
}
return result;
}
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