DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Implementation

Mercurial (c68fe15a81fc)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364
/* -*- 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/. */

#ifndef nsTextControlFrame_h___
#define nsTextControlFrame_h___

#include "mozilla/Attributes.h"
#include "mozilla/TextControlElement.h"
#include "mozilla/dom/Element.h"
#include "nsContainerFrame.h"
#include "nsIAnonymousContentCreator.h"
#include "nsIContent.h"
#include "nsITextControlFrame.h"
#include "nsIStatefulFrame.h"

class nsISelectionController;
class EditorInitializerEntryTracker;
namespace mozilla {
class AutoTextControlHandlingState;
class TextEditor;
class TextControlState;
enum class PseudoStyleType : uint8_t;
namespace dom {
class Element;
}  // namespace dom
}  // namespace mozilla

class nsTextControlFrame : public nsContainerFrame,
                           public nsIAnonymousContentCreator,
                           public nsITextControlFrame,
                           public nsIStatefulFrame {
 public:
  NS_DECL_FRAMEARENA_HELPERS(nsTextControlFrame)

  NS_DECLARE_FRAME_PROPERTY_DELETABLE(ContentScrollPos, nsPoint)

 protected:
  nsTextControlFrame(ComputedStyle*, nsPresContext*, nsIFrame::ClassID);

 public:
  explicit nsTextControlFrame(ComputedStyle* aStyle,
                              nsPresContext* aPresContext)
      : nsTextControlFrame(aStyle, aPresContext, kClassID) {}

  virtual ~nsTextControlFrame();

  /**
   * DestroyFrom() causes preparing to destroy editor and that may cause
   * running selection listeners of specllchecker selection and document
   * state listeners.  Not sure whether the former does something or not,
   * but nobody should run content script.  The latter is currently only
   * FinderHighlighter to clean up its fields at destruction.  Thus, the
   * latter won't run content script too.  Therefore, this won't run
   * unsafe script.
   */
  MOZ_CAN_RUN_SCRIPT_BOUNDARY void DestroyFrom(nsIFrame* aDestructRoot,
                                               PostDestroyData&) override;

  nsIScrollableFrame* GetScrollTargetFrame() override;
  nsIScrollableFrame* GetScrollTargetFrame() const {
    return const_cast<nsTextControlFrame*>(this)->GetScrollTargetFrame();
  }

  nscoord GetMinISize(gfxContext* aRenderingContext) override;
  nscoord GetPrefISize(gfxContext* aRenderingContext) override;

  mozilla::LogicalSize ComputeAutoSize(
      gfxContext* aRenderingContext, mozilla::WritingMode aWM,
      const mozilla::LogicalSize& aCBSize, nscoord aAvailableISize,
      const mozilla::LogicalSize& aMargin, const mozilla::LogicalSize& aBorder,
      const mozilla::LogicalSize& aPadding, ComputeSizeFlags aFlags) override;

  void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
              const ReflowInput& aReflowInput,
              nsReflowStatus& aStatus) override;

  bool GetVerticalAlignBaseline(mozilla::WritingMode aWM,
                                nscoord* aBaseline) const override {
    return GetNaturalBaselineBOffset(aWM, BaselineSharingGroup::First,
                                     aBaseline);
  }

  bool GetNaturalBaselineBOffset(mozilla::WritingMode aWM,
                                 BaselineSharingGroup aBaselineGroup,
                                 nscoord* aBaseline) const override {
    if (StyleDisplay()->IsContainLayout() || !IsSingleLineTextControl()) {
      return false;
    }
    NS_ASSERTION(mFirstBaseline != NS_INTRINSIC_ISIZE_UNKNOWN,
                 "please call Reflow before asking for the baseline");
    if (aBaselineGroup == BaselineSharingGroup::First) {
      *aBaseline = mFirstBaseline;
    } else {
      *aBaseline = BSize(aWM) - mFirstBaseline;
    }
    return true;
  }

  nsSize GetXULMinSize(nsBoxLayoutState&) override;
  bool IsXULCollapsed() override;

#ifdef ACCESSIBILITY
  mozilla::a11y::AccType AccessibleType() override;
#endif

#ifdef DEBUG_FRAME_DUMP
  nsresult GetFrameName(nsAString& aResult) const override {
    aResult.AssignLiteral("nsTextControlFrame");
    return NS_OK;
  }
#endif

  bool IsFrameOfType(uint32_t aFlags) const override {
    return nsContainerFrame::IsFrameOfType(
        aFlags & ~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));
  }

#ifdef DEBUG
  void MarkIntrinsicISizesDirty() override {
    // Need another Reflow to have a correct baseline value again.
    mFirstBaseline = NS_INTRINSIC_ISIZE_UNKNOWN;
  }
#endif

  // nsIAnonymousContentCreator
  nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) override;
  void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
                                uint32_t aFilter) override;

  void SetInitialChildList(ChildListID, nsFrameList&) override;

  void BuildDisplayList(nsDisplayListBuilder* aBuilder,
                        const nsDisplayListSet& aLists) override;

  //==== BEGIN NSIFORMCONTROLFRAME
  void SetFocus(bool aOn, bool aRepaint) override;
  MOZ_CAN_RUN_SCRIPT_BOUNDARY nsresult
  SetFormProperty(nsAtom* aName, const nsAString& aValue) override;

  //==== END NSIFORMCONTROLFRAME

  //==== NSITEXTCONTROLFRAME

  MOZ_CAN_RUN_SCRIPT_BOUNDARY already_AddRefed<mozilla::TextEditor>
  GetTextEditor() override;
  MOZ_CAN_RUN_SCRIPT NS_IMETHOD
  SetSelectionRange(uint32_t aSelectionStart, uint32_t aSelectionEnd,
                    SelectionDirection aDirection = eNone) override;
  NS_IMETHOD GetOwnedSelectionController(
      nsISelectionController** aSelCon) override;
  nsFrameSelection* GetOwnedFrameSelection() override;

  /**
   * Ensure mEditor is initialized with the proper flags and the default value.
   * @throws NS_ERROR_NOT_INITIALIZED if mEditor has not been created
   * @throws various and sundry other things
   */
  MOZ_CAN_RUN_SCRIPT_BOUNDARY nsresult EnsureEditorInitialized() override;

  //==== END NSITEXTCONTROLFRAME

  //==== NSISTATEFULFRAME

  mozilla::UniquePtr<mozilla::PresState> SaveState() override;
  NS_IMETHOD RestoreState(mozilla::PresState* aState) override;

  //=== END NSISTATEFULFRAME

  //==== OVERLOAD of nsIFrame

  /** handler for attribute changes to mContent */
  nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
                            int32_t aModType) override;

  void GetText(nsString& aText);

  /**
   * TextEquals() is designed for internal use so that aValue shouldn't
   * include \r character.  It should be handled before calling this with
   * nsContentUtils::PlatformToDOMLineBreaks().
   */
  bool TextEquals(const nsAString& aText) const;

  nsresult PeekOffset(nsPeekOffsetStruct* aPos) override;

  NS_DECL_QUERYFRAME

 protected:
  /**
   * Launch the reflow on the child frames - see nsTextControlFrame::Reflow()
   */
  void ReflowTextControlChild(nsIFrame* aFrame, nsPresContext* aPresContext,
                              const ReflowInput& aReflowInput,
                              nsReflowStatus& aStatus,
                              ReflowOutput& aParentDesiredSize);

  void ComputeBaseline(const ReflowInput&, ReflowOutput&);

 public:  // for methods who access nsTextControlFrame directly
  void SetValueChanged(bool aValueChanged);

  mozilla::dom::Element* GetRootNode() const { return mRootNode; }

  mozilla::dom::Element* GetPreviewNode() const { return mPreviewDiv; }

  mozilla::dom::Element* GetPlaceholderNode() const { return mPlaceholderDiv; }

  // called by the focus listener
  nsresult MaybeBeginSecureKeyboardInput();
  void MaybeEndSecureKeyboardInput();

#define DEFINE_TEXTCTRL_CONST_FORWARDER(type, name)          \
  type name() const {                                        \
    mozilla::TextControlElement* textControlElement =        \
        mozilla::TextControlElement::FromNode(GetContent()); \
    return textControlElement->name();                       \
  }

  DEFINE_TEXTCTRL_CONST_FORWARDER(bool, IsSingleLineTextControl)
  DEFINE_TEXTCTRL_CONST_FORWARDER(bool, IsTextArea)
  DEFINE_TEXTCTRL_CONST_FORWARDER(bool, IsPasswordTextControl)
  DEFINE_TEXTCTRL_CONST_FORWARDER(int32_t, GetCols)
  DEFINE_TEXTCTRL_CONST_FORWARDER(int32_t, GetRows)

#undef DEFINE_TEXTCTRL_CONST_FORWARDER

 protected:
  class EditorInitializer;
  friend class EditorInitializer;
  friend class mozilla::AutoTextControlHandlingState;  // needs access to
                                                       // CacheValue
  friend class mozilla::TextControlState;  // needs access to UpdateValueDisplay

  // Temp reference to scriptrunner
  NS_DECLARE_FRAME_PROPERTY_WITH_DTOR(TextControlInitializer, EditorInitializer,
                                      nsTextControlFrame::RevokeInitializer)

  static void RevokeInitializer(EditorInitializer* aInitializer) {
    aInitializer->Revoke();
  };

  class EditorInitializer : public mozilla::Runnable {
   public:
    explicit EditorInitializer(nsTextControlFrame* aFrame)
        : mozilla::Runnable("nsTextControlFrame::EditorInitializer"),
          mFrame(aFrame) {}

    NS_IMETHOD Run() override;

    // avoids use of AutoWeakFrame
    void Revoke() { mFrame = nullptr; }

   private:
    nsTextControlFrame* mFrame;
  };

  nsresult OffsetToDOMPoint(uint32_t aOffset, nsINode** aResult,
                            uint32_t* aPosition);

  /**
   * Update the textnode under our anonymous div to show the new
   * value. This should only be called when we have no editor yet.
   * @throws NS_ERROR_UNEXPECTED if the div has no text content
   */
  nsresult UpdateValueDisplay(bool aNotify, bool aBeforeEditorInit = false,
                              const nsAString* aValue = nullptr);

  /**
   * Find out whether an attribute exists on the content or not.
   * @param aAtt the attribute to determine the existence of
   * @returns false if it does not exist
   */
  bool AttributeExists(nsAtom* aAtt) const {
    return mContent && mContent->AsElement()->HasAttr(kNameSpaceID_None, aAtt);
  }

  /**
   * We call this when we are being destroyed or removed from the PFM.
   * @param aPresContext the current pres context
   */
  void PreDestroy();

  // Compute our intrinsic size.  This does not include any borders, paddings,
  // etc.  Just the size of our actual area for the text (and the scrollbars,
  // for <textarea>).
  mozilla::LogicalSize CalcIntrinsicSize(gfxContext* aRenderingContext,
                                         mozilla::WritingMode aWM,
                                         float aFontSizeInflation) const;

  void ScrollSelectionIntoViewAsync();

 private:
  // helper methods
  MOZ_CAN_RUN_SCRIPT nsresult SetSelectionInternal(
      nsINode* aStartNode, uint32_t aStartOffset, nsINode* aEndNode,
      uint32_t aEndOffset, SelectionDirection aDirection = eNone);
  MOZ_CAN_RUN_SCRIPT nsresult SelectAllOrCollapseToEndOfText(bool aSelect);
  MOZ_CAN_RUN_SCRIPT nsresult
  SetSelectionEndPoints(uint32_t aSelStart, uint32_t aSelEnd,
                        SelectionDirection aDirection = eNone);

  void FinishedInitializer() { RemoveProperty(TextControlInitializer()); }

  const nsAString& CachedValue() const { return mCachedValue; }

  void ClearCachedValue() { mCachedValue.SetIsVoid(true); }

  void CacheValue(const nsAString& aValue) { mCachedValue.Assign(aValue); }

  [[nodiscard]] bool CacheValue(const nsAString& aValue,
                                const mozilla::fallible_t& aFallible) {
    if (!mCachedValue.Assign(aValue, aFallible)) {
      ClearCachedValue();
      return false;
    }
    return true;
  }

 protected:
  class nsAnonDivObserver;

  nsresult CreateRootNode();
  void CreatePlaceholderIfNeeded();
  void CreatePreviewIfNeeded();
  already_AddRefed<mozilla::dom::Element> CreateEmptyAnonymousDiv(
      mozilla::PseudoStyleType) const;
  already_AddRefed<mozilla::dom::Element> CreateEmptyAnonymousDivWithTextNode(
      mozilla::PseudoStyleType) const;

  bool ShouldInitializeEagerly() const;
  void InitializeEagerlyIfNeeded();

  RefPtr<mozilla::dom::Element> mRootNode;
  RefPtr<mozilla::dom::Element> mPlaceholderDiv;
  RefPtr<mozilla::dom::Element> mPreviewDiv;
  RefPtr<nsAnonDivObserver> mMutationObserver;
  // Cache of the |.value| of <input> or <textarea> element without hard-wrap.
  // If its IsVoid() returns true, it doesn't cache |.value|.
  // Otherwise, it's cached when setting specific value or getting value from
  // TextEditor.  Additionally, when contents in the anonymous <div> element
  // is modified, this is cleared.
  //
  // FIXME(bug 1402545): Consider using an nsAutoString here.
  nsString mCachedValue;

  // Our first baseline, or NS_INTRINSIC_ISIZE_UNKNOWN if we have a pending
  // Reflow (or if we're contain:layout, which means we have no baseline).
  nscoord mFirstBaseline;

  // these packed bools could instead use the high order bits on mState, saving
  // 4 bytes
  bool mEditorHasBeenInitialized;
  bool mIsProcessing;

#ifdef DEBUG
  bool mInEditorInitialization;
  friend class EditorInitializerEntryTracker;
#endif
};

#endif