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nsTextControlFrame.cpp
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nsTextControlFrame.cpp
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/DebugOnly.h"
#include "nsCOMPtr.h"
#include "nsTextControlFrame.h"
#include "nsIDocument.h"
#include "nsIFormControl.h"
#include "nsIServiceManager.h"
#include "nsFrameSelection.h"
#include "nsIPlaintextEditor.h"
#include "nsEditorCID.h"
#include "nsLayoutCID.h"
#include "nsIDocumentEncoder.h"
#include "nsCaret.h"
#include "nsISelectionListener.h"
#include "nsIController.h"
#include "nsIControllers.h"
#include "nsIControllerContext.h"
#include "nsGenericHTMLElement.h"
#include "nsIEditorIMESupport.h"
#include "nsIPhonetic.h"
#include "nsTextFragment.h"
#include "nsIEditorObserver.h"
#include "nsEditProperty.h"
#include "nsIDOMHTMLTextAreaElement.h"
#include "nsINameSpaceManager.h"
#include "nsINodeInfo.h"
#include "nsFormControlFrame.h" //for registering accesskeys
#include "nsIContent.h"
#include "nsIAtom.h"
#include "nsPresContext.h"
#include "nsRenderingContext.h"
#include "nsGkAtoms.h"
#include "nsLayoutUtils.h"
#include "nsIComponentManager.h"
#include "nsView.h"
#include "nsViewManager.h"
#include "nsIDOMHTMLInputElement.h"
#include "nsIDOMElement.h"
#include "nsIDOMHTMLElement.h"
#include "nsIPresShell.h"
#include "nsBoxLayoutState.h"
//for keylistener for "return" check
#include "nsIDOMEventTarget.h"
#include "nsIDocument.h" //observe documents to send onchangenotifications
#include "nsIStyleSheet.h"//observe documents to send onchangenotifications
#include "nsIStyleRule.h"//observe documents to send onchangenotifications
#include "nsIDOMEventListener.h"//observe documents to send onchangenotifications
#include "nsGUIEvent.h"
#include "nsIDOMCharacterData.h" //for selection setting helper func
#include "nsIDOMNodeList.h" //for selection setting helper func
#include "nsIDOMRange.h" //for selection setting helper func
#include "nsPIDOMWindow.h" //needed for notify selection changed to update the menus ect.
#include "nsIDOMNode.h"
#include "nsITransactionManager.h"
#include "nsIDOMText.h" //for multiline getselection
#include "nsNodeInfoManager.h"
#include "nsContentCreatorFunctions.h"
#include "nsINativeKeyBindings.h"
#include "nsIJSContextStack.h"
#include "nsFocusManager.h"
#include "nsTextEditRules.h"
#include "nsPresState.h"
#include "nsContentList.h"
#include "nsAttrValueInlines.h"
#include "mozilla/Selection.h"
#define DEFAULT_COLUMN_WIDTH 20
using namespace mozilla;
nsIFrame*
NS_NewTextControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsTextControlFrame(aPresShell, aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsTextControlFrame)
NS_QUERYFRAME_HEAD(nsTextControlFrame)
NS_QUERYFRAME_ENTRY(nsIFormControlFrame)
NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
NS_QUERYFRAME_ENTRY(nsITextControlFrame)
NS_QUERYFRAME_ENTRY(nsIStatefulFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
#ifdef ACCESSIBILITY
a11y::AccType
nsTextControlFrame::AccessibleType()
{
return a11y::eHTMLTextFieldType;
}
#endif
#ifdef DEBUG
class EditorInitializerEntryTracker {
public:
explicit EditorInitializerEntryTracker(nsTextControlFrame &frame)
: mFrame(frame)
, mFirstEntry(false)
{
if (!mFrame.mInEditorInitialization) {
mFrame.mInEditorInitialization = true;
mFirstEntry = true;
}
}
~EditorInitializerEntryTracker()
{
if (mFirstEntry) {
mFrame.mInEditorInitialization = false;
}
}
bool EnteredMoreThanOnce() const { return !mFirstEntry; }
private:
nsTextControlFrame &mFrame;
bool mFirstEntry;
};
#endif
nsTextControlFrame::nsTextControlFrame(nsIPresShell* aShell, nsStyleContext* aContext)
: nsContainerFrame(aContext)
, mUseEditor(false)
, mIsProcessing(false)
#ifdef DEBUG
, mInEditorInitialization(false)
#endif
{
}
nsTextControlFrame::~nsTextControlFrame()
{
}
void
nsTextControlFrame::DestroyFrom(nsIFrame* aDestructRoot)
{
mScrollEvent.Revoke();
EditorInitializer* initializer = (EditorInitializer*) Properties().Get(TextControlInitializer());
if (initializer) {
initializer->Revoke();
Properties().Delete(TextControlInitializer());
}
// Unbind the text editor state object from the frame. The editor will live
// on, but things like controllers will be released.
nsCOMPtr<nsITextControlElement> txtCtrl = do_QueryInterface(GetContent());
NS_ASSERTION(txtCtrl, "Content not a text control element");
txtCtrl->UnbindFromFrame(this);
nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
nsContainerFrame::DestroyFrom(aDestructRoot);
}
nsIAtom*
nsTextControlFrame::GetType() const
{
return nsGkAtoms::textInputFrame;
}
nsresult
nsTextControlFrame::CalcIntrinsicSize(nsRenderingContext* aRenderingContext,
nsSize& aIntrinsicSize,
float aFontSizeInflation)
{
// Get leading and the Average/MaxAdvance char width
nscoord lineHeight = 0;
nscoord charWidth = 0;
nscoord charMaxAdvance = 0;
nsRefPtr<nsFontMetrics> fontMet;
nsresult rv =
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fontMet),
aFontSizeInflation);
NS_ENSURE_SUCCESS(rv, rv);
aRenderingContext->SetFont(fontMet);
lineHeight =
nsHTMLReflowState::CalcLineHeight(GetStyleContext(), NS_AUTOHEIGHT,
aFontSizeInflation);
charWidth = fontMet->AveCharWidth();
charMaxAdvance = fontMet->MaxAdvance();
// Set the width equal to the width in characters
int32_t cols = GetCols();
aIntrinsicSize.width = cols * charWidth;
// To better match IE, take the maximum character width(in twips) and remove
// 4 pixels add this on as additional padding(internalPadding). But only do
// this if charMaxAdvance != charWidth; if they are equal, this is almost
// certainly a fixed-width font.
if (charWidth != charMaxAdvance) {
nscoord internalPadding = NS_MAX(0, charMaxAdvance -
nsPresContext::CSSPixelsToAppUnits(4));
nscoord t = nsPresContext::CSSPixelsToAppUnits(1);
// Round to a multiple of t
nscoord rest = internalPadding % t;
if (rest < t - rest) {
internalPadding -= rest;
} else {
internalPadding += t - rest;
}
// Now add the extra padding on (so that small input sizes work well)
aIntrinsicSize.width += internalPadding;
} else {
// This is to account for the anonymous <br> having a 1 twip width
// in Full Standards mode, see BRFrame::Reflow and bug 228752.
if (PresContext()->CompatibilityMode() == eCompatibility_FullStandards) {
aIntrinsicSize.width += 1;
}
// Also add in the padding of our value div child. Note that it hasn't
// been reflowed yet, so we can't get its used padding, but it shouldn't be
// using percentage padding anyway.
nsMargin childPadding;
nsIFrame* firstChild = GetFirstPrincipalChild();
if (firstChild && firstChild->GetStylePadding()->GetPadding(childPadding)) {
aIntrinsicSize.width += childPadding.LeftRight();
} else {
NS_ERROR("Percentage padding on value div?");
}
}
// Increment width with cols * letter-spacing.
{
const nsStyleCoord& lsCoord = GetStyleText()->mLetterSpacing;
if (eStyleUnit_Coord == lsCoord.GetUnit()) {
nscoord letterSpacing = lsCoord.GetCoordValue();
if (letterSpacing != 0) {
aIntrinsicSize.width += cols * letterSpacing;
}
}
}
// Set the height equal to total number of rows (times the height of each
// line, of course)
aIntrinsicSize.height = lineHeight * GetRows();
// Add in the size of the scrollbars for textarea
if (IsTextArea()) {
nsIFrame* first = GetFirstPrincipalChild();
nsIScrollableFrame *scrollableFrame = do_QueryFrame(first);
NS_ASSERTION(scrollableFrame, "Child must be scrollable");
if (scrollableFrame) {
nsMargin scrollbarSizes =
scrollableFrame->GetDesiredScrollbarSizes(PresContext(), aRenderingContext);
aIntrinsicSize.width += scrollbarSizes.LeftRight();
aIntrinsicSize.height += scrollbarSizes.TopBottom();;
}
}
return NS_OK;
}
nsresult
nsTextControlFrame::EnsureEditorInitialized()
{
// This method initializes our editor, if needed.
// This code used to be called from CreateAnonymousContent(), but
// when the editor set the initial string, it would trigger a
// PresShell listener which called FlushPendingNotifications()
// during frame construction. This was causing other form controls
// to display wrong values. Additionally, calling this every time
// a text frame control is instantiated means that we're effectively
// instantiating the editor for all text fields, even if they
// never get used. So, now this method is being called lazily only
// when we actually need an editor.
// Check if this method has been called already.
// If so, just return early.
if (mUseEditor)
return NS_OK;
nsIDocument* doc = mContent->GetCurrentDoc();
NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE);
nsWeakFrame weakFrame(this);
// Flush out content on our document. Have to do this, because script
// blockers don't prevent the sink flushing out content and notifying in the
// process, which can destroy frames.
doc->FlushPendingNotifications(Flush_ContentAndNotify);
NS_ENSURE_TRUE(weakFrame.IsAlive(), NS_ERROR_FAILURE);
// Make sure that editor init doesn't do things that would kill us off
// (especially off the script blockers it'll create for its DOM mutations).
{
nsAutoScriptBlocker scriptBlocker;
// Time to mess with our security context... See comments in GetValue()
// for why this is needed.
nsCxPusher pusher;
pusher.PushNull();
// Make sure that we try to focus the content even if the method fails
class EnsureSetFocus {
public:
explicit EnsureSetFocus(nsTextControlFrame* aFrame)
: mFrame(aFrame) {}
~EnsureSetFocus() {
if (nsContentUtils::IsFocusedContent(mFrame->GetContent()))
mFrame->SetFocus(true, false);
}
private:
nsTextControlFrame *mFrame;
};
EnsureSetFocus makeSureSetFocusHappens(this);
#ifdef DEBUG
// Make sure we are not being called again until we're finished.
// If reentrancy happens, just pretend that we don't have an editor.
const EditorInitializerEntryTracker tracker(*this);
NS_ASSERTION(!tracker.EnteredMoreThanOnce(),
"EnsureEditorInitialized has been called while a previous call was in progress");
#endif
// Create an editor for the frame, if one doesn't already exist
nsCOMPtr<nsITextControlElement> txtCtrl = do_QueryInterface(GetContent());
NS_ASSERTION(txtCtrl, "Content not a text control element");
nsresult rv = txtCtrl->CreateEditor();
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_STATE(weakFrame.IsAlive());
// Turn on mUseEditor so that subsequent calls will use the
// editor.
mUseEditor = true;
// Set the selection to the beginning of the text field.
if (weakFrame.IsAlive()) {
SetSelectionEndPoints(0, 0);
}
}
NS_ENSURE_STATE(weakFrame.IsAlive());
return NS_OK;
}
nsresult
nsTextControlFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
{
NS_ASSERTION(mContent, "We should have a content!");
mState |= NS_FRAME_INDEPENDENT_SELECTION;
nsCOMPtr<nsITextControlElement> txtCtrl = do_QueryInterface(GetContent());
NS_ASSERTION(txtCtrl, "Content not a text control element");
// Bind the frame to its text control
nsresult rv = txtCtrl->BindToFrame(this);
NS_ENSURE_SUCCESS(rv, rv);
nsIContent* rootNode = txtCtrl->GetRootEditorNode();
NS_ENSURE_TRUE(rootNode, NS_ERROR_OUT_OF_MEMORY);
if (!aElements.AppendElement(rootNode))
return NS_ERROR_OUT_OF_MEMORY;
// Do we need a placeholder node?
nsAutoString placeholderTxt;
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::placeholder,
placeholderTxt);
nsContentUtils::RemoveNewlines(placeholderTxt);
mUsePlaceholder = !placeholderTxt.IsEmpty();
// Create the placeholder anonymous content if needed.
if (mUsePlaceholder) {
nsIContent* placeholderNode = txtCtrl->CreatePlaceholderNode();
NS_ENSURE_TRUE(placeholderNode, NS_ERROR_OUT_OF_MEMORY);
// Associate ::-moz-placeholder pseudo-element with the placeholder node.
nsCSSPseudoElements::Type pseudoType =
nsCSSPseudoElements::ePseudo_mozPlaceholder;
nsRefPtr<nsStyleContext> placeholderStyleContext =
PresContext()->StyleSet()->ResolvePseudoElementStyle(
mContent->AsElement(), pseudoType, GetStyleContext());
if (!aElements.AppendElement(ContentInfo(placeholderNode,
placeholderStyleContext))) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
rv = UpdateValueDisplay(false);
NS_ENSURE_SUCCESS(rv, rv);
// textareas are eagerly initialized
bool initEagerly = !IsSingleLineTextControl();
if (!initEagerly) {
// Also, input elements which have a cached selection should get eager
// editor initialization.
nsCOMPtr<nsITextControlElement> txtCtrl = do_QueryInterface(GetContent());
NS_ASSERTION(txtCtrl, "Content not a text control element");
initEagerly = txtCtrl->HasCachedSelection();
}
if (!initEagerly) {
nsCOMPtr<nsIDOMHTMLElement> element = do_QueryInterface(txtCtrl);
if (element) {
// so are input text controls with spellcheck=true
element->GetSpellcheck(&initEagerly);
}
}
if (initEagerly) {
NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),
"Someone forgot a script blocker?");
EditorInitializer* initializer = (EditorInitializer*) Properties().Get(TextControlInitializer());
if (initializer) {
initializer->Revoke();
}
initializer = new EditorInitializer(this);
Properties().Set(TextControlInitializer(),initializer);
if (!nsContentUtils::AddScriptRunner(initializer)) {
initializer->Revoke(); // paranoia
Properties().Delete(TextControlInitializer());
delete initializer;
return NS_ERROR_OUT_OF_MEMORY;
}
}
return NS_OK;
}
void
nsTextControlFrame::AppendAnonymousContentTo(nsBaseContentList& aElements,
uint32_t aFilter)
{
nsCOMPtr<nsITextControlElement> txtCtrl = do_QueryInterface(GetContent());
NS_ASSERTION(txtCtrl, "Content not a text control element");
aElements.MaybeAppendElement(txtCtrl->GetRootEditorNode());
if (!(aFilter & nsIContent::eSkipPlaceholderContent))
aElements.MaybeAppendElement(txtCtrl->GetPlaceholderNode());
}
nscoord
nsTextControlFrame::GetPrefWidth(nsRenderingContext* aRenderingContext)
{
DebugOnly<nscoord> result = 0;
DISPLAY_PREF_WIDTH(this, result);
float inflation = nsLayoutUtils::FontSizeInflationFor(this);
nsSize autoSize;
CalcIntrinsicSize(aRenderingContext, autoSize, inflation);
return autoSize.width;
}
nscoord
nsTextControlFrame::GetMinWidth(nsRenderingContext* aRenderingContext)
{
// Our min width is just our preferred width if we have auto width.
nscoord result;
DISPLAY_MIN_WIDTH(this, result);
result = GetPrefWidth(aRenderingContext);
return result;
}
nsSize
nsTextControlFrame::ComputeAutoSize(nsRenderingContext *aRenderingContext,
nsSize aCBSize, nscoord aAvailableWidth,
nsSize aMargin, nsSize aBorder,
nsSize aPadding, bool aShrinkWrap)
{
float inflation = nsLayoutUtils::FontSizeInflationFor(this);
nsSize autoSize;
nsresult rv = CalcIntrinsicSize(aRenderingContext, autoSize, inflation);
if (NS_FAILED(rv)) {
// What now?
autoSize.SizeTo(0, 0);
}
#ifdef DEBUG
// Note: Ancestor ComputeAutoSize only computes a width if we're auto-width
else if (GetStylePosition()->mWidth.GetUnit() == eStyleUnit_Auto) {
nsSize ancestorAutoSize =
nsContainerFrame::ComputeAutoSize(aRenderingContext,
aCBSize, aAvailableWidth,
aMargin, aBorder,
aPadding, aShrinkWrap);
// Disabled when there's inflation; see comment in GetPrefSize.
NS_ASSERTION(inflation != 1.0f || ancestorAutoSize.width == autoSize.width,
"Incorrect size computed by ComputeAutoSize?");
}
#endif
return autoSize;
}
NS_IMETHODIMP
nsTextControlFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsTextControlFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
// make sure that the form registers itself on the initial/first reflow
if (mState & NS_FRAME_FIRST_REFLOW) {
nsFormControlFrame::RegUnRegAccessKey(this, true);
}
// set values of reflow's out parameters
aDesiredSize.width = aReflowState.ComputedWidth() +
aReflowState.mComputedBorderPadding.LeftRight();
aDesiredSize.height = aReflowState.ComputedHeight() +
aReflowState.mComputedBorderPadding.TopBottom();
// computation of the ascent wrt the input height
nscoord lineHeight = aReflowState.ComputedHeight();
float inflation = nsLayoutUtils::FontSizeInflationFor(this);
if (!IsSingleLineTextControl()) {
lineHeight = nsHTMLReflowState::CalcLineHeight(GetStyleContext(),
NS_AUTOHEIGHT, inflation);
}
nsRefPtr<nsFontMetrics> fontMet;
nsresult rv = nsLayoutUtils::GetFontMetricsForFrame(this,
getter_AddRefs(fontMet),
inflation);
NS_ENSURE_SUCCESS(rv, rv);
// now adjust for our borders and padding
aDesiredSize.ascent =
nsLayoutUtils::GetCenteredFontBaseline(fontMet, lineHeight)
+ aReflowState.mComputedBorderPadding.top;
// overflow handling
aDesiredSize.SetOverflowAreasToDesiredBounds();
// perform reflow on all kids
nsIFrame* kid = mFrames.FirstChild();
while (kid) {
ReflowTextControlChild(kid, aPresContext, aReflowState, aStatus, aDesiredSize);
kid = kid->GetNextSibling();
}
// take into account css properties that affect overflow handling
FinishAndStoreOverflow(&aDesiredSize);
aStatus = NS_FRAME_COMPLETE;
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return NS_OK;
}
void
nsTextControlFrame::ReflowTextControlChild(nsIFrame* aKid,
nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus,
nsHTMLReflowMetrics& aParentDesiredSize)
{
// compute available size and frame offsets for child
nsSize availSize(aReflowState.ComputedWidth(),
aReflowState.ComputedHeight());
availSize.width = NS_MAX(availSize.width, 0);
availSize.height = NS_MAX(availSize.height, 0);
nsHTMLReflowState kidReflowState(aPresContext, aReflowState,
aKid, availSize);
// Set computed width and computed height for the child
nscoord width = availSize.width;
width -= kidReflowState.mComputedMargin.LeftRight() +
kidReflowState.mComputedBorderPadding.LeftRight();
width = NS_MAX(width, 0);
kidReflowState.SetComputedWidth(width);
nscoord height = availSize.height;
height -= kidReflowState.mComputedMargin.TopBottom() +
kidReflowState.mComputedBorderPadding.TopBottom();
height = NS_MAX(height, 0);
kidReflowState.SetComputedHeight(height);
// compute the offsets
nscoord xOffset = aReflowState.mComputedBorderPadding.left
+ kidReflowState.mComputedMargin.left;
nscoord yOffset = aReflowState.mComputedBorderPadding.top
+ kidReflowState.mComputedMargin.top;
// reflow the child
nsHTMLReflowMetrics desiredSize;
ReflowChild(aKid, aPresContext, desiredSize, kidReflowState,
xOffset, yOffset, 0, aStatus);
// place the child
FinishReflowChild(aKid, aPresContext, &kidReflowState,
desiredSize, xOffset, yOffset, 0);
// consider the overflow
aParentDesiredSize.mOverflowAreas.UnionWith(desiredSize.mOverflowAreas);
}
nsSize
nsTextControlFrame::GetMinSize(nsBoxLayoutState& aState)
{
// XXXbz why? Why not the nsBoxFrame sizes?
return nsBox::GetMinSize(aState);
}
bool
nsTextControlFrame::IsCollapsed()
{
// We're never collapsed in the box sense.
return false;
}
bool
nsTextControlFrame::IsLeaf() const
{
return true;
}
NS_IMETHODIMP
nsTextControlFrame::ScrollOnFocusEvent::Run()
{
if (mFrame) {
nsCOMPtr<nsITextControlElement> txtCtrl = do_QueryInterface(mFrame->GetContent());
NS_ASSERTION(txtCtrl, "Content not a text control element");
nsISelectionController* selCon = txtCtrl->GetSelectionController();
if (selCon) {
mFrame->mScrollEvent.Forget();
selCon->ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL,
nsISelectionController::SELECTION_FOCUS_REGION,
nsISelectionController::SCROLL_SYNCHRONOUS);
}
}
return NS_OK;
}
//IMPLEMENTING NS_IFORMCONTROLFRAME
void nsTextControlFrame::SetFocus(bool aOn, bool aRepaint)
{
nsCOMPtr<nsITextControlElement> txtCtrl = do_QueryInterface(GetContent());
NS_ASSERTION(txtCtrl, "Content not a text control element");
// Revoke the previous scroll event if one exists
mScrollEvent.Revoke();
// If 'dom.placeholeder.show_on_focus' preference is 'false', focusing or
// blurring the frame can have an impact on the placeholder visibility.
if (mUsePlaceholder) {
txtCtrl->UpdatePlaceholderVisibility(true);
}
if (!aOn) {
return;
}
nsISelectionController* selCon = txtCtrl->GetSelectionController();
if (!selCon)
return;
nsCOMPtr<nsISelection> ourSel;
selCon->GetSelection(nsISelectionController::SELECTION_NORMAL,
getter_AddRefs(ourSel));
if (!ourSel) return;
nsIPresShell* presShell = PresContext()->GetPresShell();
nsRefPtr<nsCaret> caret = presShell->GetCaret();
if (!caret) return;
// Scroll the current selection into view
nsISelection *caretSelection = caret->GetCaretDOMSelection();
const bool isFocusedRightNow = ourSel == caretSelection;
if (!isFocusedRightNow) {
// Don't scroll the current selection if we've been focused using the mouse.
uint32_t lastFocusMethod = 0;
nsIDocument* doc = GetContent()->GetCurrentDoc();
if (doc) {
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (fm) {
fm->GetLastFocusMethod(doc->GetWindow(), &lastFocusMethod);
}
}
if (!(lastFocusMethod & nsIFocusManager::FLAG_BYMOUSE)) {
nsRefPtr<ScrollOnFocusEvent> event = new ScrollOnFocusEvent(this);
nsresult rv = NS_DispatchToCurrentThread(event);
if (NS_SUCCEEDED(rv)) {
mScrollEvent = event;
}
}
}
// tell the caret to use our selection
caret->SetCaretDOMSelection(ourSel);
// mutual-exclusion: the selection is either controlled by the
// document or by the text input/area. Clear any selection in the
// document since the focus is now on our independent selection.
nsCOMPtr<nsISelectionController> selcon = do_QueryInterface(presShell);
nsCOMPtr<nsISelection> docSel;
selcon->GetSelection(nsISelectionController::SELECTION_NORMAL,
getter_AddRefs(docSel));
if (!docSel) return;
bool isCollapsed = false;
docSel->GetIsCollapsed(&isCollapsed);
if (!isCollapsed)
docSel->RemoveAllRanges();
}
nsresult nsTextControlFrame::SetFormProperty(nsIAtom* aName, const nsAString& aValue)
{
if (!mIsProcessing)//some kind of lock.
{
mIsProcessing = true;
if (nsGkAtoms::select == aName)
{
// Select all the text.
//
// XXX: This is lame, we can't call editor's SelectAll method
// because that triggers AutoCopies in unix builds.
// Instead, we have to call our own homegrown version
// of select all which merely builds a range that selects
// all of the content and adds that to the selection.
nsWeakFrame weakThis = this;
SelectAllOrCollapseToEndOfText(true); // NOTE: can destroy the world
if (!weakThis.IsAlive()) {
return NS_OK;
}
}
mIsProcessing = false;
}
return NS_OK;
}
nsresult
nsTextControlFrame::GetFormProperty(nsIAtom* aName, nsAString& aValue) const
{
NS_ASSERTION(nsGkAtoms::value != aName,
"Should get the value from the content node instead");
return NS_OK;
}
NS_IMETHODIMP
nsTextControlFrame::GetEditor(nsIEditor **aEditor)
{
NS_ENSURE_ARG_POINTER(aEditor);
nsresult rv = EnsureEditorInitialized();
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsITextControlElement> txtCtrl = do_QueryInterface(GetContent());
NS_ASSERTION(txtCtrl, "Content not a text control element");
*aEditor = txtCtrl->GetTextEditor();
NS_IF_ADDREF(*aEditor);
return NS_OK;
}
nsresult
nsTextControlFrame::SetSelectionInternal(nsIDOMNode *aStartNode,
int32_t aStartOffset,
nsIDOMNode *aEndNode,
int32_t aEndOffset,
nsITextControlFrame::SelectionDirection aDirection)
{
// Create a new range to represent the new selection.
// Note that we use a new range to avoid having to do
// isIncreasing checks to avoid possible errors.
nsRefPtr<nsRange> range = new nsRange();
nsresult rv = range->SetStart(aStartNode, aStartOffset);
NS_ENSURE_SUCCESS(rv, rv);
rv = range->SetEnd(aEndNode, aEndOffset);
NS_ENSURE_SUCCESS(rv, rv);
// Get the selection, clear it and add the new range to it!
nsCOMPtr<nsITextControlElement> txtCtrl = do_QueryInterface(GetContent());
NS_ASSERTION(txtCtrl, "Content not a text control element");
nsISelectionController* selCon = txtCtrl->GetSelectionController();
NS_ENSURE_TRUE(selCon, NS_ERROR_FAILURE);
nsCOMPtr<nsISelection> selection;
selCon->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(selection));
NS_ENSURE_TRUE(selection, NS_ERROR_FAILURE);
nsCOMPtr<nsISelectionPrivate> selPriv = do_QueryInterface(selection, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsDirection direction;
if (aDirection == eNone) {
// Preserve the direction
direction = selPriv->GetSelectionDirection();
} else {
direction = (aDirection == eBackward) ? eDirPrevious : eDirNext;
}
rv = selection->RemoveAllRanges();
NS_ENSURE_SUCCESS(rv, rv);
rv = selection->AddRange(range); // NOTE: can destroy the world
NS_ENSURE_SUCCESS(rv, rv);
selPriv->SetSelectionDirection(direction);
return rv;
}
nsresult
nsTextControlFrame::ScrollSelectionIntoView()
{
nsCOMPtr<nsITextControlElement> txtCtrl = do_QueryInterface(GetContent());
NS_ASSERTION(txtCtrl, "Content not a text control element");
nsISelectionController* selCon = txtCtrl->GetSelectionController();
if (selCon) {
// Scroll the selection into view (see bug 231389).
return selCon->ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL,
nsISelectionController::SELECTION_FOCUS_REGION,
nsISelectionController::SCROLL_FIRST_ANCESTOR_ONLY);
}
return NS_ERROR_FAILURE;
}
mozilla::dom::Element*
nsTextControlFrame::GetRootNodeAndInitializeEditor()
{
nsCOMPtr<nsIDOMElement> root;
GetRootNodeAndInitializeEditor(getter_AddRefs(root));
nsCOMPtr<mozilla::dom::Element> rootElem = do_QueryInterface(root);
return rootElem;
}
nsresult
nsTextControlFrame::GetRootNodeAndInitializeEditor(nsIDOMElement **aRootElement)
{
NS_ENSURE_ARG_POINTER(aRootElement);
nsCOMPtr<nsIEditor> editor;
GetEditor(getter_AddRefs(editor));
if (!editor)
return NS_OK;
return editor->GetRootElement(aRootElement);
}
nsresult
nsTextControlFrame::SelectAllOrCollapseToEndOfText(bool aSelect)
{
nsCOMPtr<nsIDOMElement> rootElement;
nsresult rv = GetRootNodeAndInitializeEditor(getter_AddRefs(rootElement));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIContent> rootContent = do_QueryInterface(rootElement);
nsCOMPtr<nsIDOMNode> rootNode(do_QueryInterface(rootElement));
NS_ENSURE_TRUE(rootNode && rootContent, NS_ERROR_FAILURE);
int32_t numChildren = rootContent->GetChildCount();
if (numChildren > 0) {
// We never want to place the selection after the last
// br under the root node!
nsIContent *child = rootContent->GetChildAt(numChildren - 1);
if (child) {
if (child->Tag() == nsGkAtoms::br)
--numChildren;
}
if (!aSelect && numChildren) {
child = rootContent->GetChildAt(numChildren - 1);
if (child && child->IsNodeOfType(nsINode::eTEXT)) {
rootNode = do_QueryInterface(child);
const nsTextFragment* fragment = child->GetText();
numChildren = fragment ? fragment->GetLength() : 0;
}
}
}
rv = SetSelectionInternal(rootNode, aSelect ? 0 : numChildren,
rootNode, numChildren);
NS_ENSURE_SUCCESS(rv, rv);
return ScrollSelectionIntoView();
}
nsresult
nsTextControlFrame::SetSelectionEndPoints(int32_t aSelStart, int32_t aSelEnd,
nsITextControlFrame::SelectionDirection aDirection)
{
NS_ASSERTION(aSelStart <= aSelEnd, "Invalid selection offsets!");
if (aSelStart > aSelEnd)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMNode> startNode, endNode;
int32_t startOffset, endOffset;
// Calculate the selection start point.
nsresult rv = OffsetToDOMPoint(aSelStart, getter_AddRefs(startNode), &startOffset);
NS_ENSURE_SUCCESS(rv, rv);
if (aSelStart == aSelEnd) {
// Collapsed selection, so start and end are the same!
endNode = startNode;
endOffset = startOffset;
}
else {
// Selection isn't collapsed so we have to calculate
// the end point too.
rv = OffsetToDOMPoint(aSelEnd, getter_AddRefs(endNode), &endOffset);
NS_ENSURE_SUCCESS(rv, rv);
}
return SetSelectionInternal(startNode, startOffset, endNode, endOffset, aDirection);
}
NS_IMETHODIMP
nsTextControlFrame::SetSelectionRange(int32_t aSelStart, int32_t aSelEnd,
nsITextControlFrame::SelectionDirection aDirection)
{
nsresult rv = EnsureEditorInitialized();
NS_ENSURE_SUCCESS(rv, rv);
if (aSelStart > aSelEnd) {
// Simulate what we'd see SetSelectionStart() was called, followed
// by a SetSelectionEnd().
aSelStart = aSelEnd;
}
return SetSelectionEndPoints(aSelStart, aSelEnd, aDirection);
}
NS_IMETHODIMP
nsTextControlFrame::SetSelectionStart(int32_t aSelectionStart)
{
nsresult rv = EnsureEditorInitialized();
NS_ENSURE_SUCCESS(rv, rv);
int32_t selStart = 0, selEnd = 0;
rv = GetSelectionRange(&selStart, &selEnd);
NS_ENSURE_SUCCESS(rv, rv);
if (aSelectionStart > selEnd) {
// Collapse to the new start point.
selEnd = aSelectionStart;
}
selStart = aSelectionStart;
return SetSelectionEndPoints(selStart, selEnd);
}
NS_IMETHODIMP
nsTextControlFrame::SetSelectionEnd(int32_t aSelectionEnd)
{
nsresult rv = EnsureEditorInitialized();
NS_ENSURE_SUCCESS(rv, rv);
int32_t selStart = 0, selEnd = 0;
rv = GetSelectionRange(&selStart, &selEnd);
NS_ENSURE_SUCCESS(rv, rv);
if (aSelectionEnd < selStart) {
// Collapse to the new end point.
selStart = aSelectionEnd;
}
selEnd = aSelectionEnd;
return SetSelectionEndPoints(selStart, selEnd);
}
nsresult
nsTextControlFrame::OffsetToDOMPoint(int32_t aOffset,
nsIDOMNode** aResult,
int32_t* aPosition)
{
NS_ENSURE_ARG_POINTER(aResult && aPosition);
*aResult = nullptr;
*aPosition = 0;
nsCOMPtr<nsIDOMElement> rootElement;