The Tor Browser: dom/base/CompositionStringSynthesizer.cpp@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #include "CompositionStringSynthesizer.h"

     7 #include "nsContentUtils.h"

     8 #include "nsIDocShell.h"

     9 #include "nsIFrame.h"

    10 #include "nsIPresShell.h"

    11 #include "nsIWidget.h"

    12 #include "nsPIDOMWindow.h"

    13 #include "nsView.h"

    14 #include "mozilla/TextEvents.h"

    16 namespace mozilla {

    17 namespace dom {

    19 NS_IMPL_ISUPPORTS(CompositionStringSynthesizer,

    20                   nsICompositionStringSynthesizer)

    22 CompositionStringSynthesizer::CompositionStringSynthesizer(

    23                                 nsPIDOMWindow* aWindow)

    24 {

    25   mWindow = do_GetWeakReference(aWindow);

    26   mClauses = new TextRangeArray();

    27   ClearInternal();

    28 }

    30 CompositionStringSynthesizer::~CompositionStringSynthesizer()

    31 {

    32 }

    34 void

    35 CompositionStringSynthesizer::ClearInternal()

    36 {

    37   mString.Truncate();

    38   mClauses->Clear();

    39   mCaret.mRangeType = 0;

    40 }

    42 nsIWidget*

    43 CompositionStringSynthesizer::GetWidget()

    44 {

    45   nsCOMPtr<nsPIDOMWindow> window = do_QueryReferent(mWindow);

    46   if (!window) {

    47     return nullptr;

    48   }

    49   nsIDocShell *docShell = window->GetDocShell();

    50   if (!docShell) {

    51     return nullptr;

    52   }

    53   nsCOMPtr<nsIPresShell> presShell = docShell->GetPresShell();

    54   if (!presShell) {

    55     return nullptr;

    56   }

    57   nsIFrame* frame = presShell->GetRootFrame();

    58   if (!frame) {

    59     return nullptr;

    60   }

    61   return frame->GetView()->GetNearestWidget(nullptr);

    62 }

    64 NS_IMETHODIMP

    65 CompositionStringSynthesizer::SetString(const nsAString& aString)

    66 {

    67   nsCOMPtr<nsIWidget> widget = GetWidget();

    68   NS_ENSURE_TRUE(widget && !widget->Destroyed(), NS_ERROR_NOT_AVAILABLE);

    70   mString = aString;

    71   return NS_OK;

    72 }

    74 NS_IMETHODIMP

    75 CompositionStringSynthesizer::AppendClause(uint32_t aLength,

    76                                            uint32_t aAttribute)

    77 {

    78   nsCOMPtr<nsIWidget> widget = GetWidget();

    79   NS_ENSURE_TRUE(widget && !widget->Destroyed(), NS_ERROR_NOT_AVAILABLE);

    81   switch (aAttribute) {

    82     case ATTR_RAWINPUT:

    83     case ATTR_SELECTEDRAWTEXT:

    84     case ATTR_CONVERTEDTEXT:

    85     case ATTR_SELECTEDCONVERTEDTEXT: {

    86       TextRange textRange;

    87       textRange.mStartOffset =

    88         mClauses->IsEmpty() ? 0 : mClauses->LastElement().mEndOffset;

    89       textRange.mEndOffset = textRange.mStartOffset + aLength;

    90       textRange.mRangeType = aAttribute;

    91       mClauses->AppendElement(textRange);

    92       return NS_OK;

    93     }

    94     default:

    95       return NS_ERROR_INVALID_ARG;

    96   }

    97 }

    99 NS_IMETHODIMP

   100 CompositionStringSynthesizer::SetCaret(uint32_t aOffset, uint32_t aLength)

   101 {

   102   nsCOMPtr<nsIWidget> widget = GetWidget();

   103   NS_ENSURE_TRUE(widget && !widget->Destroyed(), NS_ERROR_NOT_AVAILABLE);

   105   mCaret.mStartOffset = aOffset;

   106   mCaret.mEndOffset = mCaret.mStartOffset + aLength;

   107   mCaret.mRangeType = NS_TEXTRANGE_CARETPOSITION;

   108   return NS_OK;

   109 }

   111 NS_IMETHODIMP

   112 CompositionStringSynthesizer::DispatchEvent(bool* aDefaultPrevented)

   113 {

   114   NS_ENSURE_ARG_POINTER(aDefaultPrevented);

   115   nsCOMPtr<nsIWidget> widget = GetWidget();

   116   NS_ENSURE_TRUE(widget && !widget->Destroyed(), NS_ERROR_NOT_AVAILABLE);

   118   if (!nsContentUtils::IsCallerChrome()) {

   119     return NS_ERROR_DOM_SECURITY_ERR;

   120   }

   122   if (!mClauses->IsEmpty() &&

   123       mClauses->LastElement().mEndOffset != mString.Length()) {

   124     NS_WARNING("Sum of length of the all clauses must be same as the string "

   125                "length");

   126     ClearInternal();

   127     return NS_ERROR_ILLEGAL_VALUE;

   128   }

   129   if (mCaret.mRangeType == NS_TEXTRANGE_CARETPOSITION) {

   130     if (mCaret.mEndOffset > mString.Length()) {

   131       NS_WARNING("Caret position is out of the composition string");

   132       ClearInternal();

   133       return NS_ERROR_ILLEGAL_VALUE;

   134     }

   135     mClauses->AppendElement(mCaret);

   136   }

   138   WidgetTextEvent textEvent(true, NS_TEXT_TEXT, widget);

   139   textEvent.time = PR_IntervalNow();

   140   textEvent.theText = mString;

   141   if (!mClauses->IsEmpty()) {

   142     textEvent.mRanges = mClauses;

   143   }

   145   // XXX How should we set false for this on b2g?

   146   textEvent.mFlags.mIsSynthesizedForTests = true;

   148   nsEventStatus status = nsEventStatus_eIgnore;

   149   nsresult rv = widget->DispatchEvent(&textEvent, status);

   150   *aDefaultPrevented = (status == nsEventStatus_eConsumeNoDefault);

   152   ClearInternal();

   154   NS_ENSURE_SUCCESS(rv, rv);

   156   return NS_OK;

   157 }

   159 } // namespace dom

   160 } // namespace mozilla

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