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gecko-dev
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gecko-dev/layout/forms/nsTextControlFrame.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "gfxContext.h"
#include "nsCOMPtr.h"
#include "nsFontMetrics.h"
#include "nsTextControlFrame.h"
#include "nsIEditor.h"
#include "nsCaret.h"
#include "nsCSSPseudoElements.h"
#include "nsGenericHTMLElement.h"
#include "nsTextFragment.h"
#include "nsNameSpaceManager.h"
#include "nsCheckboxRadioFrame.h" //for registering accesskeys
#include "nsIContent.h"
#include "nsPresContext.h"
#include "nsGkAtoms.h"
#include "nsLayoutUtils.h"
#include <algorithm>
#include "nsRange.h" //for selection setting helper func
#include "nsINode.h"
#include "nsPIDOMWindow.h" //needed for notify selection changed to update the menus ect.
#include "nsQueryObject.h"
#include "nsILayoutHistoryState.h"
#include "nsFocusManager.h"
#include "mozilla/PresShell.h"
#include "mozilla/PresState.h"
#include "nsAttrValueInlines.h"
#include "mozilla/dom/Selection.h"
#include "nsContentUtils.h"
#include "nsTextNode.h"
#include "mozilla/dom/HTMLInputElement.h"
#include "mozilla/dom/HTMLTextAreaElement.h"
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/dom/Text.h"
#include "mozilla/MathAlgorithms.h"
#include "nsFrameSelection.h"
#define DEFAULT_COLUMN_WIDTH 20
using namespace mozilla;
using namespace mozilla::dom;
nsIFrame* NS_NewTextControlFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
return new (aPresShell)
nsTextControlFrame(aStyle, aPresShell->GetPresContext());
}
NS_IMPL_FRAMEARENA_HELPERS(nsTextControlFrame)
NS_QUERYFRAME_HEAD(nsTextControlFrame)
NS_QUERYFRAME_ENTRY(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
class nsTextControlFrame::nsAnonDivObserver final
: public nsStubMutationObserver {
public:
explicit nsAnonDivObserver(nsTextControlFrame& aFrame) : mFrame(aFrame) {}
NS_DECL_ISUPPORTS
NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
private:
~nsAnonDivObserver() = default;
nsTextControlFrame& mFrame;
};
nsTextControlFrame::nsTextControlFrame(ComputedStyle* aStyle,
nsPresContext* aPresContext,
nsIFrame::ClassID aClassID)
: nsContainerFrame(aStyle, aPresContext, aClassID),
mFirstBaseline(NS_INTRINSIC_ISIZE_UNKNOWN),
mEditorHasBeenInitialized(false),
mIsProcessing(false)
#ifdef DEBUG
,
mInEditorInitialization(false)
#endif
{
ClearCachedValue();
}
nsTextControlFrame::~nsTextControlFrame() = default;
nsIScrollableFrame* nsTextControlFrame::GetScrollTargetFrame() const {
if (!mRootNode) {
return nullptr;
}
return do_QueryFrame(mRootNode->GetPrimaryFrame());
}
void nsTextControlFrame::DestroyFrom(nsIFrame* aDestructRoot,
PostDestroyData& aPostDestroyData) {
RemoveProperty(TextControlInitializer());
// Unbind the text editor state object from the frame. The editor will live
// on, but things like controllers will be released.
RefPtr<TextControlElement> textControlElement =
TextControlElement::FromNode(GetContent());
MOZ_ASSERT(textControlElement);
textControlElement->UnbindFromFrame(this);
nsCheckboxRadioFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
if (mMutationObserver) {
mRootNode->RemoveMutationObserver(mMutationObserver);
mMutationObserver = nullptr;
}
// If we're a subclass like nsNumberControlFrame, then it owns the root of the
// anonymous subtree where mRootNode is.
if (mClass == kClassID) {
aPostDestroyData.AddAnonymousContent(mRootNode.forget());
} else {
MOZ_ASSERT(!mRootNode || !mRootNode->IsRootOfNativeAnonymousSubtree());
mRootNode = nullptr;
}
aPostDestroyData.AddAnonymousContent(mPlaceholderDiv.forget());
aPostDestroyData.AddAnonymousContent(mPreviewDiv.forget());
nsContainerFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
}
LogicalSize nsTextControlFrame::CalcIntrinsicSize(
gfxContext* aRenderingContext, WritingMode aWM,
float aFontSizeInflation) const {
LogicalSize intrinsicSize(aWM);
// Get leading and the Average/MaxAdvance char width
nscoord lineHeight = 0;
nscoord charWidth = 0;
nscoord charMaxAdvance = 0;
RefPtr<nsFontMetrics> fontMet =
nsLayoutUtils::GetFontMetricsForFrame(this, aFontSizeInflation);
lineHeight =
ReflowInput::CalcLineHeight(GetContent(), Style(), PresContext(),
NS_UNCONSTRAINEDSIZE, aFontSizeInflation);
charWidth = fontMet->AveCharWidth();
charMaxAdvance = fontMet->MaxAdvance();
// Set the width equal to the width in characters
int32_t cols = GetCols();
intrinsicSize.ISize(aWM) = 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 we think we have a fixed-width font.
if (mozilla::Abs(charWidth - charMaxAdvance) >
(unsigned)nsPresContext::CSSPixelsToAppUnits(1)) {
nscoord internalPadding =
std::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)
intrinsicSize.ISize(aWM) += 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) {
intrinsicSize.ISize(aWM) += 1;
}
}
// Increment width with cols * letter-spacing.
{
const StyleLength& letterSpacing = StyleText()->mLetterSpacing;
if (!letterSpacing.IsZero()) {
intrinsicSize.ISize(aWM) += cols * letterSpacing.ToAppUnits();
}
}
// Set the height equal to total number of rows (times the height of each
// line, of course)
intrinsicSize.BSize(aWM) = lineHeight * GetRows();
// Add in the size of the scrollbars for textarea
if (IsTextArea()) {
nsIScrollableFrame* scrollableFrame = GetScrollTargetFrame();
NS_ASSERTION(scrollableFrame, "Child must be scrollable");
if (scrollableFrame) {
LogicalMargin scrollbarSizes(
aWM, scrollableFrame->GetDesiredScrollbarSizes(PresContext(),
aRenderingContext));
intrinsicSize.ISize(aWM) += scrollbarSizes.IStartEnd(aWM);
intrinsicSize.BSize(aWM) += scrollbarSizes.BStartEnd(aWM);
}
}
return intrinsicSize;
}
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.
if (mEditorHasBeenInitialized) return NS_OK;
Document* doc = mContent->GetComposedDoc();
NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE);
AutoWeakFrame 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(FlushType::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).
{
RefPtr<TextControlElement> textControlElement =
TextControlElement::FromNode(GetContent());
MOZ_ASSERT(textControlElement);
// Hide selection changes during the initialization, as webpages should not
// be aware of these initializations
AutoHideSelectionChanges hideSelectionChanges(
textControlElement->GetConstFrameSelection());
nsAutoScriptBlocker scriptBlocker;
// Time to mess with our security context... See comments in GetValue()
// for why this is needed.
mozilla::dom::AutoNoJSAPI nojsapi;
// 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
nsresult rv = textControlElement->CreateEditor();
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_STATE(weakFrame.IsAlive());
// Set mEditorHasBeenInitialized so that subsequent calls will use the
// editor.
mEditorHasBeenInitialized = true;
if (weakFrame.IsAlive()) {
uint32_t position = 0;
// Set the selection to the end of the text field (bug 1287655),
// but only if the contents has changed (bug 1337392).
if (textControlElement->ValueChanged()) {
nsAutoString val;
textControlElement->GetTextEditorValue(val, true);
position = val.Length();
}
SetSelectionEndPoints(position, position);
}
}
NS_ENSURE_STATE(weakFrame.IsAlive());
return NS_OK;
}
already_AddRefed<Element> nsTextControlFrame::MakeAnonElement(
PseudoStyleType aPseudoType, Element* aParent, nsAtom* aTag) const {
MOZ_ASSERT(aPseudoType != PseudoStyleType::NotPseudo);
Document* doc = PresContext()->Document();
RefPtr<Element> element = doc->CreateHTMLElement(aTag);
element->SetPseudoElementType(aPseudoType);
if (aPseudoType == PseudoStyleType::mozTextControlEditingRoot) {
// Make our root node editable
element->SetFlags(NODE_IS_EDITABLE);
}
if (aPseudoType == PseudoStyleType::mozNumberSpinDown ||
aPseudoType == PseudoStyleType::mozNumberSpinUp) {
element->SetAttr(kNameSpaceID_None, nsGkAtoms::aria_hidden, u"true"_ns,
false);
}
if (aParent) {
aParent->AppendChildTo(element, false);
}
return element.forget();
}
already_AddRefed<Element> nsTextControlFrame::MakeAnonDivWithTextNode(
PseudoStyleType aPseudoType) const {
RefPtr<Element> div = MakeAnonElement(aPseudoType);
// Create the text node for the anonymous <div> element.
nsNodeInfoManager* nim = div->OwnerDoc()->NodeInfoManager();
RefPtr<nsTextNode> textNode = new (nim) nsTextNode(nim);
// If the anonymous div element is not for the placeholder, we should
// mark the text node as "maybe modified frequently" for avoiding ASCII
// range checks at every input.
if (aPseudoType != PseudoStyleType::placeholder) {
textNode->MarkAsMaybeModifiedFrequently();
// Additionally, this is a password field, the text node needs to be
// marked as "maybe masked" unless it's in placeholder.
if (IsPasswordTextControl()) {
textNode->MarkAsMaybeMasked();
}
}
div->AppendChildTo(textNode, false);
return div.forget();
}
nsresult nsTextControlFrame::CreateAnonymousContent(
nsTArray<ContentInfo>& aElements) {
MOZ_ASSERT(!nsContentUtils::IsSafeToRunScript());
MOZ_ASSERT(mContent, "We should have a content!");
AddStateBits(NS_FRAME_INDEPENDENT_SELECTION);
RefPtr<TextControlElement> textControlElement =
TextControlElement::FromNode(GetContent());
MOZ_ASSERT(textControlElement);
mRootNode = MakeAnonElement(PseudoStyleType::mozTextControlEditingRoot);
if (NS_WARN_IF(!mRootNode)) {
return NS_ERROR_FAILURE;
}
mMutationObserver = new nsAnonDivObserver(*this);
mRootNode->AddMutationObserver(mMutationObserver);
// Bind the frame to its text control.
//
// This can realistically fail in paginated mode, where we may replicate
// fixed-positioned elements and the replicated frame will not get the chance
// to get an editor.
nsresult rv = textControlElement->BindToFrame(this);
if (NS_WARN_IF(NS_FAILED(rv))) {
mRootNode->RemoveMutationObserver(mMutationObserver);
mMutationObserver = nullptr;
mRootNode = nullptr;
return rv;
}
aElements.AppendElement(mRootNode);
CreatePlaceholderIfNeeded();
if (mPlaceholderDiv) {
if (!IsSingleLineTextControl()) {
// For textareas, UpdateValueDisplay doesn't initialize the visibility
// status of the placeholder because it returns early, so we have to
// do that manually here.
textControlElement->UpdateOverlayTextVisibility(true);
}
aElements.AppendElement(mPlaceholderDiv);
}
CreatePreviewIfNeeded();
if (mPreviewDiv) {
aElements.AppendElement(mPreviewDiv);
}
rv = UpdateValueDisplay(false);
NS_ENSURE_SUCCESS(rv, rv);
InitializeEagerlyIfNeeded();
return NS_OK;
}
bool nsTextControlFrame::ShouldInitializeEagerly() const {
// textareas are eagerly initialized.
if (!IsSingleLineTextControl()) {
return true;
}
// Also, input elements which have a cached selection should get eager
// editor initialization.
TextControlElement* textControlElement =
TextControlElement::FromNode(GetContent());
MOZ_ASSERT(textControlElement);
if (textControlElement->HasCachedSelection()) {
return true;
}
// So do input text controls with spellcheck=true
if (auto* htmlElement = nsGenericHTMLElement::FromNode(mContent)) {
if (htmlElement->Spellcheck()) {
return true;
}
}
return false;
}
void nsTextControlFrame::InitializeEagerlyIfNeeded() {
MOZ_ASSERT(!nsContentUtils::IsSafeToRunScript(),
"Someone forgot a script blocker?");
if (!ShouldInitializeEagerly()) {
return;
}
EditorInitializer* initializer = new EditorInitializer(this);
SetProperty(TextControlInitializer(), initializer);
nsContentUtils::AddScriptRunner(initializer);
}
void nsTextControlFrame::CreatePlaceholderIfNeeded() {
MOZ_ASSERT(!mPlaceholderDiv);
// Do we need a placeholder node?
nsAutoString placeholder;
if (!mContent->AsElement()->GetAttr(nsGkAtoms::placeholder, placeholder)) {
return;
}
mPlaceholderDiv = MakeAnonDivWithTextNode(PseudoStyleType::placeholder);
UpdatePlaceholderText(placeholder, false);
}
void nsTextControlFrame::PlaceholderChanged(const nsAttrValue* aOld,
const nsAttrValue* aNew) {
if (!aOld || !aNew) {
return; // This should be handled by GetAttributeChangeHint.
}
// If we've changed the attribute but we still haven't reframed, there's
// nothing to do either.
if (!mPlaceholderDiv) {
return;
}
nsAutoString placeholder;
aNew->ToString(placeholder);
UpdatePlaceholderText(placeholder, true);
}
void nsTextControlFrame::UpdatePlaceholderText(nsString& aPlaceholder,
bool aNotify) {
MOZ_DIAGNOSTIC_ASSERT(mPlaceholderDiv);
MOZ_DIAGNOSTIC_ASSERT(mPlaceholderDiv->GetFirstChild());
if (IsTextArea()) { // <textarea>s preserve newlines...
nsContentUtils::PlatformToDOMLineBreaks(aPlaceholder);
} else { // ...<input>s don't
nsContentUtils::RemoveNewlines(aPlaceholder);
}
mPlaceholderDiv->GetFirstChild()->AsText()->SetText(aPlaceholder, aNotify);
}
void nsTextControlFrame::CreatePreviewIfNeeded() {
RefPtr<TextControlElement> textControlElement =
TextControlElement::FromNode(GetContent());
MOZ_ASSERT(textControlElement);
if (!textControlElement->IsPreviewEnabled()) {
return;
}
mPreviewDiv = MakeAnonDivWithTextNode(PseudoStyleType::mozTextControlPreview);
}
void nsTextControlFrame::AppendAnonymousContentTo(
nsTArray<nsIContent*>& aElements, uint32_t aFilter) {
aElements.AppendElement(mRootNode);
if (mPlaceholderDiv && !(aFilter & nsIContent::eSkipPlaceholderContent)) {
aElements.AppendElement(mPlaceholderDiv);
}
if (mPreviewDiv) {
aElements.AppendElement(mPreviewDiv);
}
}
nscoord nsTextControlFrame::GetPrefISize(gfxContext* aRenderingContext) {
nscoord result = 0;
DISPLAY_PREF_INLINE_SIZE(this, result);
float inflation = nsLayoutUtils::FontSizeInflationFor(this);
WritingMode wm = GetWritingMode();
result = CalcIntrinsicSize(aRenderingContext, wm, inflation).ISize(wm);
return result;
}
nscoord nsTextControlFrame::GetMinISize(gfxContext* aRenderingContext) {
// Our min inline size is just our preferred width if we have auto inline size
nscoord result;
DISPLAY_MIN_INLINE_SIZE(this, result);
result = GetPrefISize(aRenderingContext);
return result;
}
LogicalSize nsTextControlFrame::ComputeAutoSize(
gfxContext* aRenderingContext, WritingMode aWM, const LogicalSize& aCBSize,
nscoord aAvailableISize, const LogicalSize& aMargin,
const LogicalSize& aBorderPadding, ComputeSizeFlags aFlags) {
float inflation = nsLayoutUtils::FontSizeInflationFor(this);
LogicalSize autoSize = CalcIntrinsicSize(aRenderingContext, aWM, inflation);
// Note: nsContainerFrame::ComputeAutoSize only computes the inline-size (and
// only for 'auto'), the block-size it returns is always NS_UNCONSTRAINEDSIZE.
const auto& iSizeCoord = StylePosition()->ISize(aWM);
if (iSizeCoord.IsAuto()) {
if (aFlags.contains(ComputeSizeFlag::IClampMarginBoxMinSize)) {
// CalcIntrinsicSize isn't aware of grid-item margin-box clamping, so we
// fall back to nsContainerFrame's ComputeAutoSize to handle that.
// XXX maybe a font-inflation issue here? (per the assertion below).
autoSize.ISize(aWM) =
nsContainerFrame::ComputeAutoSize(aRenderingContext, aWM, aCBSize,
aAvailableISize, aMargin,
aBorderPadding, aFlags)
.ISize(aWM);
}
#ifdef DEBUG
else {
LogicalSize ancestorAutoSize = nsContainerFrame::ComputeAutoSize(
aRenderingContext, aWM, aCBSize, aAvailableISize, aMargin,
aBorderPadding, aFlags);
// Disabled when there's inflation; see comment in GetXULPrefSize.
MOZ_ASSERT(inflation != 1.0f ||
ancestorAutoSize.ISize(aWM) == autoSize.ISize(aWM),
"Incorrect size computed by ComputeAutoSize?");
}
#endif
}
return autoSize;
}
void nsTextControlFrame::ComputeBaseline(const ReflowInput& aReflowInput,
ReflowOutput& aDesiredSize) {
// If we're layout-contained, we have no baseline.
if (aReflowInput.mStyleDisplay->IsContainLayout()) {
mFirstBaseline = NS_INTRINSIC_ISIZE_UNKNOWN;
return;
}
WritingMode wm = aReflowInput.GetWritingMode();
// Calculate the baseline and store it in mFirstBaseline.
nscoord lineHeight = aReflowInput.ComputedBSize();
float inflation = nsLayoutUtils::FontSizeInflationFor(this);
if (!IsSingleLineTextControl()) {
lineHeight = ReflowInput::CalcLineHeight(
GetContent(), Style(), PresContext(), NS_UNCONSTRAINEDSIZE, inflation);
}
RefPtr<nsFontMetrics> fontMet =
nsLayoutUtils::GetFontMetricsForFrame(this, inflation);
mFirstBaseline = nsLayoutUtils::GetCenteredFontBaseline(fontMet, lineHeight,
wm.IsLineInverted()) +
aReflowInput.ComputedLogicalBorderPadding(wm).BStart(wm);
aDesiredSize.SetBlockStartAscent(mFirstBaseline);
}
void nsTextControlFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
MarkInReflow();
DO_GLOBAL_REFLOW_COUNT("nsTextControlFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
// make sure that the form registers itself on the initial/first reflow
if (mState & NS_FRAME_FIRST_REFLOW) {
nsCheckboxRadioFrame::RegUnRegAccessKey(this, true);
}
// set values of reflow's out parameters
WritingMode wm = aReflowInput.GetWritingMode();
aDesiredSize.SetSize(wm, aReflowInput.ComputedSizeWithBorderPadding(wm));
ComputeBaseline(aReflowInput, aDesiredSize);
// overflow handling
aDesiredSize.SetOverflowAreasToDesiredBounds();
// perform reflow on all kids
nsIFrame* kid = mFrames.FirstChild();
while (kid) {
ReflowTextControlChild(kid, aPresContext, aReflowInput, aStatus,
aDesiredSize);
kid = kid->GetNextSibling();
}
// take into account css properties that affect overflow handling
FinishAndStoreOverflow(&aDesiredSize);
aStatus.Reset(); // This type of frame can't be split.
NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
}
void nsTextControlFrame::ReflowTextControlChild(
nsIFrame* aKid, nsPresContext* aPresContext,
const ReflowInput& aReflowInput, nsReflowStatus& aStatus,
ReflowOutput& aParentDesiredSize) {
// compute available size and frame offsets for child
WritingMode wm = aKid->GetWritingMode();
LogicalSize availSize = aReflowInput.ComputedSizeWithPadding(wm);
availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
ReflowInput kidReflowInput(aPresContext, aReflowInput, aKid, availSize,
Nothing(), ReflowInput::InitFlag::CallerWillInit);
// Override padding with our computed padding in case we got it from theming
// or percentage.
kidReflowInput.Init(aPresContext, Nothing(), Nothing(),
Some(aReflowInput.ComputedLogicalPadding(wm)));
// Set computed width and computed height for the child
kidReflowInput.SetComputedWidth(aReflowInput.ComputedWidth());
kidReflowInput.SetComputedHeight(aReflowInput.ComputedHeight());
// Offset the frame by the size of the parent's border
nscoord xOffset = aReflowInput.ComputedPhysicalBorderPadding().left -
aReflowInput.ComputedPhysicalPadding().left;
nscoord yOffset = aReflowInput.ComputedPhysicalBorderPadding().top -
aReflowInput.ComputedPhysicalPadding().top;
// reflow the child
ReflowOutput desiredSize(aReflowInput);
ReflowChild(aKid, aPresContext, desiredSize, kidReflowInput, xOffset, yOffset,
ReflowChildFlags::Default, aStatus);
// place the child
FinishReflowChild(aKid, aPresContext, desiredSize, &kidReflowInput, xOffset,
yOffset, ReflowChildFlags::Default);
// consider the overflow
aParentDesiredSize.mOverflowAreas.UnionWith(desiredSize.mOverflowAreas);
}
nsSize nsTextControlFrame::GetXULMinSize(nsBoxLayoutState& aState) {
// XXXbz why? Why not the nsBoxFrame sizes?
return nsIFrame::GetUncachedXULMinSize(aState);
}
bool nsTextControlFrame::IsXULCollapsed() {
// We're never collapsed in the box sense.
return false;
}
// IMPLEMENTING NS_IFORMCONTROLFRAME
void nsTextControlFrame::SetFocus(bool aOn, bool aRepaint) {
TextControlElement* textControlElement =
TextControlElement::FromNode(GetContent());
MOZ_ASSERT(textControlElement);
// If 'dom.placeholeder.show_on_focus' preference is 'false', focusing or
// blurring the frame can have an impact on the placeholder visibility.
if (mPlaceholderDiv) {
textControlElement->UpdateOverlayTextVisibility(true);
}
if (!aOn) {
return;
}
nsISelectionController* selCon = textControlElement->GetSelectionController();
if (!selCon) {
return;
}
RefPtr<Selection> ourSel =
selCon->GetSelection(nsISelectionController::SELECTION_NORMAL);
if (!ourSel) {
return;
}
mozilla::PresShell* presShell = PresContext()->GetPresShell();
RefPtr<nsCaret> caret = presShell->GetCaret();
if (!caret) {
return;
}
// Tell the caret to use our selection
caret->SetSelection(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.
RefPtr<Selection> docSel =
presShell->GetSelection(nsISelectionController::SELECTION_NORMAL);
if (!docSel) {
return;
}
if (!docSel->IsCollapsed()) {
docSel->RemoveAllRanges(IgnoreErrors());
}
}
nsresult nsTextControlFrame::SetFormProperty(nsAtom* 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.
AutoWeakFrame weakThis = this;
SelectAllOrCollapseToEndOfText(true); // NOTE: can destroy the world
if (!weakThis.IsAlive()) {
return NS_OK;
}
}
mIsProcessing = false;
}
return NS_OK;
}
already_AddRefed<TextEditor> nsTextControlFrame::GetTextEditor() {
if (NS_WARN_IF(NS_FAILED(EnsureEditorInitialized()))) {
return nullptr;
}
RefPtr<TextControlElement> textControlElement =
TextControlElement::FromNode(GetContent());
MOZ_ASSERT(textControlElement);
RefPtr<TextEditor> textEditor = textControlElement->GetTextEditor();
return textEditor.forget();
}
nsresult nsTextControlFrame::SetSelectionInternal(
nsINode* aStartNode, uint32_t aStartOffset, nsINode* aEndNode,
uint32_t aEndOffset, nsITextControlFrame::SelectionDirection aDirection) {
// Get the selection, clear it and add the new range to it!
TextControlElement* textControlElement =
TextControlElement::FromNode(GetContent());
MOZ_ASSERT(textControlElement);
nsISelectionController* selCon = textControlElement->GetSelectionController();
NS_ENSURE_TRUE(selCon, NS_ERROR_FAILURE);
RefPtr<Selection> selection =
selCon->GetSelection(nsISelectionController::SELECTION_NORMAL);
NS_ENSURE_TRUE(selection, NS_ERROR_FAILURE);
nsDirection direction;
if (aDirection == eNone) {
// Preserve the direction
direction = selection->GetDirection();
} else {
direction = (aDirection == eBackward) ? eDirPrevious : eDirNext;
}
ErrorResult error;
selection->SetStartAndEndInLimiter(*aStartNode, aStartOffset, *aEndNode,
aEndOffset, error);
MOZ_TRY(error.StealNSResult());
selection->SetDirection(direction);
return NS_OK;
}
void nsTextControlFrame::ScrollSelectionIntoViewAsync(
ScrollAncestors aScrollAncestors) {
auto* textControlElement = TextControlElement::FromNode(GetContent());
MOZ_ASSERT(textControlElement);
nsISelectionController* selCon = textControlElement->GetSelectionController();
if (!selCon) {
return;
}
int16_t flags = aScrollAncestors == ScrollAncestors::Yes
? 0
: nsISelectionController::SCROLL_FIRST_ANCESTOR_ONLY;
// Scroll the selection into view (see bug 231389).
selCon->ScrollSelectionIntoView(
nsISelectionController::SELECTION_NORMAL,
nsISelectionController::SELECTION_FOCUS_REGION, flags);
}
nsresult nsTextControlFrame::SelectAllOrCollapseToEndOfText(bool aSelect) {
nsresult rv = EnsureEditorInitialized();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
nsCOMPtr<nsINode> rootNode;
rootNode = mRootNode;
NS_ENSURE_TRUE(rootNode, NS_ERROR_FAILURE);
int32_t numChildren = mRootNode->GetChildCount();
if (numChildren > 0) {
// We never want to place the selection after the last
// br under the root node!
nsIContent* child = mRootNode->GetLastChild();
if (child) {
if (child->IsHTMLElement(nsGkAtoms::br)) {
child = child->GetPreviousSibling();
--numChildren;
} else if (child->IsText() && !child->Length()) {
// Editor won't remove text node when empty value.
--numChildren;
}
}
if (!aSelect && numChildren) {
child = child->GetPreviousSibling();
if (child && child->IsText()) {
rootNode = child;
numChildren = child->AsText()->TextDataLength();
}
}
}
rv = SetSelectionInternal(rootNode, aSelect ? 0 : numChildren, rootNode,
numChildren);
NS_ENSURE_SUCCESS(rv, rv);
ScrollSelectionIntoViewAsync();
return NS_OK;
}
nsresult nsTextControlFrame::SetSelectionEndPoints(
uint32_t aSelStart, uint32_t aSelEnd,
nsITextControlFrame::SelectionDirection aDirection) {
NS_ASSERTION(aSelStart <= aSelEnd, "Invalid selection offsets!");
if (aSelStart > aSelEnd) return NS_ERROR_FAILURE;
nsCOMPtr<nsINode> startNode, endNode;
uint32_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(
uint32_t aSelStart, uint32_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);
}
nsresult nsTextControlFrame::OffsetToDOMPoint(uint32_t aOffset,
nsINode** aResult,
uint32_t* aPosition) {
NS_ENSURE_ARG_POINTER(aResult && aPosition);
*aResult = nullptr;
*aPosition = 0;
nsresult rv = EnsureEditorInitialized();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
RefPtr<Element> rootNode = mRootNode;
NS_ENSURE_TRUE(rootNode, NS_ERROR_FAILURE);
nsCOMPtr<nsINodeList> nodeList = rootNode->ChildNodes();
uint32_t length = nodeList->Length();
NS_ASSERTION(length <= 2,
"We should have one text node and one mozBR at most");
nsCOMPtr<nsINode> firstNode = nodeList->Item(0);
Text* textNode = firstNode ? firstNode->GetAsText() : nullptr;
if (length == 0) {
rootNode.forget(aResult);
*aPosition = 0;
} else if (textNode) {
uint32_t textLength = textNode->Length();
if (length == 2 && aOffset == textLength) {
// If we're at the end of the text node and we have a trailing BR node,
// set the selection on the BR node.
rootNode.forget(aResult);
*aPosition = 1;
} else {
// Otherwise, set the selection on the textnode itself.
firstNode.forget(aResult);
*aPosition = std::min(aOffset, textLength);
}
} else {
rootNode.forget(aResult);
*aPosition = 0;
}
return NS_OK;
}
/////END INTERFACE IMPLEMENTATIONS
////NSIFRAME
nsresult nsTextControlFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute,
int32_t aModType) {
auto* textControlElement = TextControlElement::FromNode(GetContent());
MOZ_ASSERT(textControlElement);
nsISelectionController* selCon = textControlElement->GetSelectionController();
const bool needEditor =
nsGkAtoms::maxlength == aAttribute || nsGkAtoms::readonly == aAttribute ||
nsGkAtoms::disabled == aAttribute || nsGkAtoms::spellcheck == aAttribute;
RefPtr<TextEditor> textEditor = needEditor ? GetTextEditor() : nullptr;
if ((needEditor && !textEditor) || !selCon) {
return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute,
aModType);
}
if (nsGkAtoms::maxlength == aAttribute) {
if (textEditor) {
textEditor->SetMaxTextLength(textControlElement->UsedMaxLength());
}
return NS_OK;
}
if (nsGkAtoms::readonly == aAttribute || nsGkAtoms::disabled == aAttribute) {
if (AttributeExists(aAttribute)) {
if (nsContentUtils::IsFocusedContent(mContent)) {
selCon->SetCaretEnabled(false);
}
textEditor->AddFlags(nsIEditor::eEditorReadonlyMask);
} else {
if (!AttributeExists(aAttribute == nsGkAtoms::readonly
? nsGkAtoms::disabled
: nsGkAtoms::readonly)) {
if (nsContentUtils::IsFocusedContent(mContent)) {
selCon->SetCaretEnabled(true);
}
textEditor->RemoveFlags(nsIEditor::eEditorReadonlyMask);
}
}
return NS_OK;
}
if (!mEditorHasBeenInitialized && nsGkAtoms::value == aAttribute) {
UpdateValueDisplay(true);
return NS_OK;
}
// Allow the base class to handle common attributes supported by all form
// elements...
return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
}
void nsTextControlFrame::GetText(nsString& aText) {
if (HTMLInputElement* inputElement = HTMLInputElement::FromNode(mContent)) {
if (IsSingleLineTextControl()) {
// There will be no line breaks so we can ignore the wrap property.
inputElement->GetTextEditorValue(aText, true);
return;
}
aText.Truncate();
return;
}
MOZ_ASSERT(!IsSingleLineTextControl());
if (HTMLTextAreaElement* textAreaElement =
HTMLTextAreaElement::FromNode(mContent)) {
textAreaElement->GetValue(aText);
return;
}
MOZ_ASSERT(aText.IsEmpty());
aText.Truncate();
}
bool nsTextControlFrame::TextEquals(const nsAString& aText) const {
if (HTMLInputElement* inputElement = HTMLInputElement::FromNode(mContent)) {
if (IsSingleLineTextControl()) {
// There will be no line breaks so we can ignore the wrap property.
return inputElement->TextEditorValueEquals(aText);
}
return aText.IsEmpty();
}
MOZ_ASSERT(!IsSingleLineTextControl());
if (HTMLTextAreaElement* textAreaElement =
HTMLTextAreaElement::FromNode(mContent)) {
return textAreaElement->ValueEquals(aText);
}
return aText.IsEmpty();
}
/// END NSIFRAME OVERLOADS
// NOTE(emilio): This is needed because the root->primary frame map is not set
// up by the time this is called.
static nsIFrame* FindRootNodeFrame(const nsFrameList& aChildList,
const nsIContent* aRoot) {
for (nsIFrame* f : aChildList) {
if (f->GetContent() == aRoot) {
return f;
}
if (nsIFrame* root = FindRootNodeFrame(f->PrincipalChildList(), aRoot)) {
return root;
}
}
return nullptr;
}
void nsTextControlFrame::SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList) {
nsContainerFrame::SetInitialChildList(aListID, aChildList);
if (aListID != kPrincipalList) {
return;
}
// Mark the scroll frame as being a reflow root. This will allow incremental
// reflows to be initiated at the scroll frame, rather than descending from
// the root frame of the frame hierarchy.
if (nsIFrame* frame = FindRootNodeFrame(PrincipalChildList(), mRootNode)) {
frame->AddStateBits(NS_FRAME_REFLOW_ROOT);
auto* textControlElement = TextControlElement::FromNode(GetContent());
MOZ_ASSERT(textControlElement);
textControlElement->InitializeKeyboardEventListeners();
if (nsPoint* contentScrollPos = TakeProperty(ContentScrollPos())) {
// If we have a scroll pos stored to be passed to our anonymous
// div, do it here!
nsIStatefulFrame* statefulFrame = do_QueryFrame(frame);
NS_ASSERTION(statefulFrame,
"unexpected type of frame for the anonymous div");
UniquePtr<PresState> fakePresState = NewPresState();
fakePresState->scrollState() = *contentScrollPos;
statefulFrame->RestoreState(fakePresState.get());
delete contentScrollPos;
}
} else {
MOZ_ASSERT(!mRootNode || PrincipalChildList().IsEmpty());
}
}
void nsTextControlFrame::SetValueChanged(bool aValueChanged) {
auto* textControlElement = TextControlElement::FromNode(GetContent());
MOZ_ASSERT(textControlElement);
if (mPlaceholderDiv) {
AutoWeakFrame weakFrame(this);
textControlElement->UpdateOverlayTextVisibility(true);
if (!weakFrame.IsAlive()) {
return;
}
}
textControlElement->SetValueChanged(aValueChanged);
}
nsresult nsTextControlFrame::UpdateValueDisplay(bool aNotify,
bool aBeforeEditorInit,
const nsAString* aValue) {
if (!IsSingleLineTextControl()) // textareas don't use this
return NS_OK;
MOZ_ASSERT(mRootNode, "Must have a div content\n");
MOZ_ASSERT(!mEditorHasBeenInitialized,
"Do not call this after editor has been initialized");
nsIContent* childContent = mRootNode->GetFirstChild();
Text* textContent;
if (!childContent) {
// Set up a textnode with our value
RefPtr<nsTextNode> textNode = new (mContent->NodeInfo()->NodeInfoManager())
nsTextNode(mContent->NodeInfo()->NodeInfoManager());
textNode->MarkAsMaybeModifiedFrequently();
if (IsPasswordTextControl()) {
textNode->MarkAsMaybeMasked();
}
mRootNode->AppendChildTo(textNode, aNotify);
textContent = textNode;
} else {
textContent = childContent->GetAsText();
}
NS_ENSURE_TRUE(textContent, NS_ERROR_UNEXPECTED);
TextControlElement* textControlElement =
TextControlElement::FromNode(GetContent());
MOZ_ASSERT(textControlElement);
// Get the current value of the textfield from the content.
nsAutoString value;
if (aValue) {
value = *aValue;
} else {
textControlElement->GetTextEditorValue(value, true);
}
// Update the display of the placeholder value and preview text if needed.
// We don't need to do this if we're about to initialize the editor, since
// EnsureEditorInitialized takes care of this.
if ((mPlaceholderDiv || mPreviewDiv) && !aBeforeEditorInit) {
AutoWeakFrame weakFrame(this);
textControlElement->UpdateOverlayTextVisibility(aNotify);
NS_ENSURE_STATE(weakFrame.IsAlive());
}
if (aBeforeEditorInit && value.IsEmpty()) {
if (nsIContent* node = mRootNode->GetFirstChild()) {
mRootNode->RemoveChildNode(node, true);
}
return NS_OK;
}
return textContent->SetText(value, aNotify);
}
NS_IMETHODIMP
nsTextControlFrame::GetOwnedSelectionController(
nsISelectionController** aSelCon) {
NS_ENSURE_ARG_POINTER(aSelCon);
TextControlElement* textControlElement =
TextControlElement::FromNode(GetContent());
MOZ_ASSERT(textControlElement);
*aSelCon = textControlElement->GetSelectionController();
NS_IF_ADDREF(*aSelCon);
return NS_OK;
}
nsFrameSelection* nsTextControlFrame::GetOwnedFrameSelection() {
auto* textControlElement = TextControlElement::FromNode(GetContent());
MOZ_ASSERT(textControlElement);
return textControlElement->GetConstFrameSelection();
}
UniquePtr<PresState> nsTextControlFrame::SaveState() {
if (nsIStatefulFrame* scrollStateFrame =
do_QueryFrame(GetScrollTargetFrame())) {
return scrollStateFrame->SaveState();
}
return nullptr;
}
NS_IMETHODIMP
nsTextControlFrame::RestoreState(PresState* aState) {
NS_ENSURE_ARG_POINTER(aState);
// Query the nsIStatefulFrame from the HTMLScrollFrame
if (nsIStatefulFrame* scrollStateFrame =
do_QueryFrame(GetScrollTargetFrame())) {
return scrollStateFrame->RestoreState(aState);
}
// Most likely, we don't have our anonymous content constructed yet, which
// would cause us to end up here. In this case, we'll just store the scroll
// pos ourselves, and forward it to the scroll frame later when it's created.
SetProperty(ContentScrollPos(), new nsPoint(aState->scrollState()));
return NS_OK;
}
nsresult nsTextControlFrame::PeekOffset(nsPeekOffsetStruct* aPos) {
return NS_ERROR_FAILURE;
}
void nsTextControlFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) {
/*
* The implementation of this method is equivalent as:
* nsContainerFrame::BuildDisplayList()
* with the difference that we filter-out the placeholder frame when it
* should not be visible.
*/
DO_GLOBAL_REFLOW_COUNT_DSP("nsTextControlFrame");
auto* control = TextControlElement::FromNode(GetContent());
MOZ_ASSERT(control);
DisplayBorderBackgroundOutline(aBuilder, aLists);
// Redirect all lists to the Content list so that nothing can escape, ie
// opacity creating stacking contexts that then get sorted with stacking
// contexts external to us.
nsDisplayList* content = aLists.Content();
nsDisplayListSet set(content, content, content, content, content, content);
// Clip the placeholder and preview text to the root box, so that it doesn't,
// e.g., overlay with our <input type="number"> spin buttons.
//
// For other input types, this will be a noop since we size the root via
// ReflowTextControlChild, which sets the same available space for all
// children.
auto clipToRoot = [&](Maybe<DisplayListClipState::AutoSaveRestore>& aClip) {
if (mRootNode) {
if (auto* root = mRootNode->GetPrimaryFrame()) {
aClip.emplace(aBuilder);
nsRect rootBox(aBuilder->ToReferenceFrame(root), root->GetSize());
aClip->ClipContentDescendants(rootBox);
}
}
};
// We build the ::placeholder first so that it renders below mRootNode which
// draws the caret and we always want that on top (bug 1637476).
if (mPlaceholderDiv && control->GetPlaceholderVisibility() &&
mPlaceholderDiv->GetPrimaryFrame()) {
Maybe<DisplayListClipState::AutoSaveRestore> overlayTextClip;
clipToRoot(overlayTextClip);
auto* kid = mPlaceholderDiv->GetPrimaryFrame();
MOZ_ASSERT(kid->GetParent() == this);
BuildDisplayListForChild(aBuilder, kid, set);
}
for (auto* kid : mFrames) {
nsIContent* kidContent = kid->GetContent();
Maybe<DisplayListClipState::AutoSaveRestore> overlayTextClip;
if (kidContent == mPlaceholderDiv) {
continue; // we handled mPlaceholderDiv explicitly above
}
if (kidContent == mPreviewDiv && !control->GetPreviewVisibility()) {
continue;
}
if (kidContent == mPreviewDiv) {
clipToRoot(overlayTextClip);
}
BuildDisplayListForChild(aBuilder, kid, set);
}
}
NS_IMETHODIMP
nsTextControlFrame::EditorInitializer::Run() {
if (!mFrame) {
return NS_OK;
}
// Need to block script to avoid bug 669767.
nsAutoScriptBlocker scriptBlocker;
RefPtr<mozilla::PresShell> presShell = mFrame->PresShell();
bool observes = presShell->ObservesNativeAnonMutationsForPrint();
presShell->ObserveNativeAnonMutationsForPrint(true);
// This can cause the frame to be destroyed (and call Revoke()).
mFrame->EnsureEditorInitialized();
presShell->ObserveNativeAnonMutationsForPrint(observes);
// The frame can *still* be destroyed even though we have a scriptblocker,
// bug 682684.
if (!mFrame) {
return NS_ERROR_FAILURE;
}
mFrame->FinishedInitializer();
return NS_OK;
}
NS_IMPL_ISUPPORTS(nsTextControlFrame::nsAnonDivObserver, nsIMutationObserver)
void nsTextControlFrame::nsAnonDivObserver::CharacterDataChanged(
nsIContent* aContent, const CharacterDataChangeInfo&) {
mFrame.ClearCachedValue();
}
void nsTextControlFrame::nsAnonDivObserver::ContentAppended(
nsIContent* aFirstNewContent) {
mFrame.ClearCachedValue();
}
void nsTextControlFrame::nsAnonDivObserver::ContentInserted(
nsIContent* aChild) {
mFrame.ClearCachedValue();
}
void nsTextControlFrame::nsAnonDivObserver::ContentRemoved(
nsIContent* aChild, nsIContent* aPreviousSibling) {
mFrame.ClearCachedValue();
}
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