The Tor Browser: layout/forms/nsColorControlFrame.cpp@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     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 "nsColorControlFrame.h"

     8 #include "nsContentCreatorFunctions.h"

     9 #include "nsContentList.h"

    10 #include "nsContentUtils.h"

    11 #include "nsFormControlFrame.h"

    12 #include "nsGkAtoms.h"

    13 #include "nsIDOMHTMLInputElement.h"

    14 #include "nsIDOMNode.h"

    15 #include "nsIFormControl.h"

    16 #include "nsStyleSet.h"

    18 using mozilla::dom::Element;

    20 nsColorControlFrame::nsColorControlFrame(nsStyleContext* aContext):

    21   nsColorControlFrameSuper(aContext)

    22 {

    23 }

    25 nsIFrame*

    26 NS_NewColorControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)

    27 {

    28   return new (aPresShell) nsColorControlFrame(aContext);

    29 }

    31 NS_IMPL_FRAMEARENA_HELPERS(nsColorControlFrame)

    33 NS_QUERYFRAME_HEAD(nsColorControlFrame)

    34   NS_QUERYFRAME_ENTRY(nsColorControlFrame)

    35   NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)

    36 NS_QUERYFRAME_TAIL_INHERITING(nsColorControlFrameSuper)

    39 void nsColorControlFrame::DestroyFrom(nsIFrame* aDestructRoot)

    40 {

    41   nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);

    42   nsContentUtils::DestroyAnonymousContent(&mColorContent);

    43   nsColorControlFrameSuper::DestroyFrom(aDestructRoot);

    44 }

    46 nsIAtom*

    47 nsColorControlFrame::GetType() const

    48 {

    49   return nsGkAtoms::colorControlFrame;

    50 }

    52 #ifdef DEBUG_FRAME_DUMP

    53 nsresult

    54 nsColorControlFrame::GetFrameName(nsAString& aResult) const

    55 {

    56   return MakeFrameName(NS_LITERAL_STRING("ColorControl"), aResult);

    57 }

    58 #endif

    60 // Create the color area for the button.

    61 // The frame will be generated by the frame constructor.

    62 nsresult

    63 nsColorControlFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)

    64 {

    65   nsCOMPtr<nsIDocument> doc = mContent->GetCurrentDoc();

    66   mColorContent = doc->CreateHTMLElement(nsGkAtoms::div);

    68   // Mark the element to be native anonymous before setting any attributes.

    69   mColorContent->SetIsNativeAnonymousRoot();

    71   nsresult rv = UpdateColor();

    72   NS_ENSURE_SUCCESS(rv, rv);

    74   nsCSSPseudoElements::Type pseudoType = nsCSSPseudoElements::ePseudo_mozColorSwatch;

    75   nsRefPtr<nsStyleContext> newStyleContext = PresContext()->StyleSet()->

    76     ResolvePseudoElementStyle(mContent->AsElement(), pseudoType,

    77                               StyleContext(), mColorContent->AsElement());

    78   if (!aElements.AppendElement(ContentInfo(mColorContent, newStyleContext))) {

    79     return NS_ERROR_OUT_OF_MEMORY;

    80   }

    82   return NS_OK;

    83 }

    85 void

    86 nsColorControlFrame::AppendAnonymousContentTo(nsBaseContentList& aElements,

    87                                               uint32_t aFilter)

    88 {

    89   aElements.MaybeAppendElement(mColorContent);

    90 }

    92 nsresult

    93 nsColorControlFrame::UpdateColor()

    94 {

    95   // Get the color from the "value" property of our content; it will return the

    96   // default color (through the sanitization algorithm) if there is none.

    97   nsAutoString color;

    98   nsCOMPtr<nsIDOMHTMLInputElement> elt = do_QueryInterface(mContent);

    99   elt->GetValue(color);

   100   MOZ_ASSERT(!color.IsEmpty(),

   101              "Content node's GetValue() should return a valid color string "

   102              "(the default color, in case no valid color is set)");

   104   // Set the background-color style property of the swatch element to this color

   105   return mColorContent->SetAttr(kNameSpaceID_None, nsGkAtoms::style,

   106       NS_LITERAL_STRING("background-color:") + color, true);

   107 }

   109 nsresult

   110 nsColorControlFrame::AttributeChanged(int32_t  aNameSpaceID,

   111                                       nsIAtom* aAttribute,

   112                                       int32_t  aModType)

   113 {

   114   NS_ASSERTION(mColorContent, "The color div must exist");

   116   // If the value attribute is set, update the color box, but only if we're

   117   // still a color control, which might not be the case if the type attribute

   118   // was removed/changed.

   119   nsCOMPtr<nsIFormControl> fctrl = do_QueryInterface(GetContent());

   120   if (fctrl->GetType() == NS_FORM_INPUT_COLOR &&

   121       aNameSpaceID == kNameSpaceID_None && nsGkAtoms::value == aAttribute) {

   122     UpdateColor();

   123   }

   124   return nsColorControlFrameSuper::AttributeChanged(aNameSpaceID, aAttribute,

   125                                                     aModType);

   126 }

   128 nsIFrame*

   129 nsColorControlFrame::GetContentInsertionFrame()

   130 {

   131   return this;

   132 }

   134 Element*

   135 nsColorControlFrame::GetPseudoElement(nsCSSPseudoElements::Type aType)

   136 {

   137   if (aType == nsCSSPseudoElements::ePseudo_mozColorSwatch) {

   138     return mColorContent;

   139   }

   141   return nsContainerFrame::GetPseudoElement(aType);

   142 }

The Tor Browser / file revision

layout/forms/nsColorControlFrame.cpp@97036ab72558

layout/forms/nsColorControlFrame.cpp