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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 1.0 (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);
// 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.
nsresult
NS_NewComboboxControlFrame(nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsComboboxControlFrame* it = new nsComboboxControlFrame;
if (!it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aNewFrame = it;
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) {
aPresContext.ResolvePseudoStyleContextFor(mContent, nsHTMLAtoms::comboText,
mStyleContext, PR_FALSE,
&mBlockTextStyle);
// 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;
RefreshStyleContext(aPresContext, nsHTMLAtoms::comboText, mBlockTextStyle, mContent, mStyleContext);
RefreshStyleContext(aPresContext, nsHTMLAtoms::comboTextSelected, mBlockTextSelectedStyle, mContent, mStyleContext);
RefreshStyleContext(aPresContext, nsHTMLAtoms::comboTextSelectedFocus, mBlockTextSelectedFocusStyle, mContent, mStyleContext);
}
return rv;
}
//----------------------------------------------------------------------
NS_IMETHODIMP nsComboboxControlFrame::HandleEvent(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus)
{
if (aEvent->message == NS_MOUSE_EXIT) {
// If dropdown is visible and we have exited the combo box then leave the
// list up and have the listbox capture all of the mouse events.
if (mCurrentStyleContext == mVisibleStyleContext) {
mListControlFrame->CaptureMouseEvents(PR_TRUE);
}
}
if (nsEventStatus_eConsumeNoDefault == aEventStatus) {
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;
}
void
nsComboboxControlFrame::SelectionChanged()
{
// Generate a NS_ONCHANGE event.
//XXX: Todo complete the implementation of selection changed
// nsIViewManager *vm;
// view->GetViewManager(vm);
// nsGUIEvent event;
// event.eventStructType = NS_GUI_EVENT;
// event.widget = this; //XXX: How do I get a widget
// NS_ADDREF(event.widget);
// NS_CONTROL_CHANGE
// InitEvent(event, aMsg);
// vm->DispatchEvent(&event, result);
// NS_RELEASE(event.widget);
// NS_RELEASE(vm);
}
//--------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::ListWasSelected(nsIPresContext* aPresContext)
{
mArrowStyle = mBtnOutStyleContext;
MouseClicked(aPresContext);
nsString str;
if (nsnull != mListControlFrame) {
mListControlFrame->GetSelectedItem(str);
// Check to see if the selection changed
if (PR_FALSE == str.Equals(mTextStr)) {
mTextStr = str;
SelectionChanged();
}
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);
}
mListControlFrame->CaptureMouseEvents(PR_FALSE);
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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