The Tor Browser: layout/xul/nsProgressMeterFrame.cpp@7e26c7da4463

     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 //

     7 // David Hyatt & Eric Vaughan

     8 // Netscape Communications

     9 //

    10 // See documentation in associated header file

    11 //

    13 #include "nsProgressMeterFrame.h"

    14 #include "nsCSSRendering.h"

    15 #include "nsIContent.h"

    16 #include "nsPresContext.h"

    17 #include "nsGkAtoms.h"

    18 #include "nsNameSpaceManager.h"

    19 #include "nsCOMPtr.h"

    20 #include "nsBoxLayoutState.h"

    21 #include "nsIReflowCallback.h"

    22 #include "nsContentUtils.h"

    23 #include "mozilla/Attributes.h"

    25 class nsReflowFrameRunnable : public nsRunnable

    26 {

    27 public:

    28   nsReflowFrameRunnable(nsIFrame* aFrame,

    29                         nsIPresShell::IntrinsicDirty aIntrinsicDirty,

    30                         nsFrameState aBitToAdd);

    32   NS_DECL_NSIRUNNABLE

    34   nsWeakFrame mWeakFrame;

    35   nsIPresShell::IntrinsicDirty mIntrinsicDirty;

    36   nsFrameState mBitToAdd;

    37 };

    39 nsReflowFrameRunnable::nsReflowFrameRunnable(nsIFrame* aFrame,

    40                           nsIPresShell::IntrinsicDirty aIntrinsicDirty,

    41                           nsFrameState aBitToAdd)

    42   : mWeakFrame(aFrame),

    43     mIntrinsicDirty(aIntrinsicDirty),

    44     mBitToAdd(aBitToAdd)

    45 {

    46 }

    48 NS_IMETHODIMP

    49 nsReflowFrameRunnable::Run()

    50 {

    51   if (mWeakFrame.IsAlive()) {

    52     mWeakFrame->PresContext()->PresShell()->

    53       FrameNeedsReflow(mWeakFrame, mIntrinsicDirty, mBitToAdd);

    54   }

    55   return NS_OK;

    56 }

    58 //

    59 // NS_NewToolbarFrame

    60 //

    61 // Creates a new Toolbar frame and returns it

    62 //

    63 nsIFrame*

    64 NS_NewProgressMeterFrame (nsIPresShell* aPresShell, nsStyleContext* aContext)

    65 {

    66   return new (aPresShell) nsProgressMeterFrame(aPresShell, aContext);

    67 }

    69 NS_IMPL_FRAMEARENA_HELPERS(nsProgressMeterFrame)

    71 //

    72 // nsProgressMeterFrame dstr

    73 //

    74 // Cleanup, if necessary

    75 //

    76 nsProgressMeterFrame :: ~nsProgressMeterFrame ( )

    77 {

    78 }

    80 class nsAsyncProgressMeterInit MOZ_FINAL : public nsIReflowCallback

    81 {

    82 public:

    83   nsAsyncProgressMeterInit(nsIFrame* aFrame) : mWeakFrame(aFrame) {}

    85   virtual bool ReflowFinished() MOZ_OVERRIDE

    86   {

    87     bool shouldFlush = false;

    88     nsIFrame* frame = mWeakFrame.GetFrame();

    89     if (frame) {

    90       nsAutoScriptBlocker scriptBlocker;

    91       frame->AttributeChanged(kNameSpaceID_None, nsGkAtoms::mode, 0);

    92       shouldFlush = true;

    93     }

    94     delete this;

    95     return shouldFlush;

    96   }

    98   virtual void ReflowCallbackCanceled() MOZ_OVERRIDE

    99   {

   100     delete this;

   101   }

   103   nsWeakFrame mWeakFrame;

   104 };

   106 NS_IMETHODIMP

   107 nsProgressMeterFrame::DoLayout(nsBoxLayoutState& aState)

   108 {

   109   if (mNeedsReflowCallback) {

   110     nsIReflowCallback* cb = new nsAsyncProgressMeterInit(this);

   111     if (cb) {

   112       PresContext()->PresShell()->PostReflowCallback(cb);

   113     }

   114     mNeedsReflowCallback = false;

   115   }

   116   return nsBoxFrame::DoLayout(aState);

   117 }

   119 nsresult

   120 nsProgressMeterFrame::AttributeChanged(int32_t aNameSpaceID,

   121                                        nsIAtom* aAttribute,

   122                                        int32_t aModType)

   123 {

   124   NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),

   125       "Scripts not blocked in nsProgressMeterFrame::AttributeChanged!");

   126   nsresult rv = nsBoxFrame::AttributeChanged(aNameSpaceID, aAttribute,

   127                                              aModType);

   128   if (NS_OK != rv) {

   129     return rv;

   130   }

   132   // did the progress change?

   133   bool undetermined = mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::mode,

   134                                             nsGkAtoms::undetermined, eCaseMatters);

   135   if (nsGkAtoms::mode == aAttribute ||

   136       (!undetermined &&

   137        (nsGkAtoms::value == aAttribute || nsGkAtoms::max == aAttribute))) {

   138     nsIFrame* barChild = GetFirstPrincipalChild();

   139     if (!barChild) return NS_OK;

   140     nsIFrame* remainderChild = barChild->GetNextSibling();

   141     if (!remainderChild) return NS_OK;

   142     nsCOMPtr<nsIContent> remainderContent = remainderChild->GetContent();

   143     if (!remainderContent) return NS_OK;

   145     int32_t flex = 1, maxFlex = 1;

   146     if (!undetermined) {

   147       nsAutoString value, maxValue;

   148       mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::value, value);

   149       mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::max, maxValue);

   151       nsresult error;

   152       flex = value.ToInteger(&error);

   153       maxFlex = maxValue.ToInteger(&error);

   154       if (NS_FAILED(error) || maxValue.IsEmpty()) {

   155         maxFlex = 100;

   156       }

   157       if (maxFlex < 1) {

   158         maxFlex = 1;

   159       }

   160       if (flex < 0) {

   161         flex = 0;

   162       }

   163       if (flex > maxFlex) {

   164         flex = maxFlex;

   165       }

   166     }

   168     nsContentUtils::AddScriptRunner(new nsSetAttrRunnable(

   169       barChild->GetContent(), nsGkAtoms::flex, flex));

   170     nsContentUtils::AddScriptRunner(new nsSetAttrRunnable(

   171       remainderContent, nsGkAtoms::flex, maxFlex - flex));

   172     nsContentUtils::AddScriptRunner(new nsReflowFrameRunnable(

   173       this, nsIPresShell::eTreeChange, NS_FRAME_IS_DIRTY));

   174   }

   175   return NS_OK;

   176 }

   178 #ifdef DEBUG_FRAME_DUMP

   179 nsresult

   180 nsProgressMeterFrame::GetFrameName(nsAString& aResult) const

   181 {

   182   return MakeFrameName(NS_LITERAL_STRING("ProgressMeter"), aResult);

   183 }

   184 #endif

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