dom/smil/nsSMILValue.cpp
author Mike Shal <mshal@mozilla.com>
Thu, 24 Aug 2017 22:52:01 -0400
changeset 434519 cb773c661e0ca0bf297e977343076bef34411523
parent 416428 6a629adbb62a299d7208373d1c6f375149d2afdb
child 466377 d7d2f08e051c3c355d41dc5c1ce1bd3ca55a43b9
permissions -rw-r--r--
Bug 1402012 - Update buildconfig.py to use PartialConfigEnvironment; r=glandium By using the PartialConfigEnvironment, the clients of buildconfig will depend on config.statusd/ files instead of config.status directly. Clients can access substs and defines using buildconfig.substs['FOO'] or buildconfig.defines['BAR'], and then collect file-level dependencies for make using buildconfig.get_dependencies(). All GENERATED_FILES rules already make use of this because file_generate.py automatically includes these dependencies (along with all python modules loaded). As a result of this commit, re-running configure will no longer cause the world to be rebuilt. Although config.status is updated, no build steps use config.status directly and instead depend on values in config.statusd/, which are written with FileAvoidWrite. Since those files are not official targets according to the make backend, make won't try to continually rebuild the backend when those files are out of date. And since they are FileAvoidWrite, make will only re-run dependent steps if the actual configure value has changed. As a result of using JSON to load data from the config.statusd directory, substs can be unicode (instead of a bare string type). generate_certdata.py converts the subst manually to a string so the value can be exported to the environment without issue on Windows. Additionally, patching the buildconfig.substs dict no longer works, so the unit-symbolstore.py test was modified to patch the underlying buildconfig.substs._dict instead. The other files that needed to be modified make use of all the defines for the preprocessor. Those that are used during 'mach build' now use buildconfig.defines['ALLDEFINES'], which maps to a special FileAvoidWrite file generated for the PartialConfigEnvironment. MozReview-Commit-ID: 2pJ4s3TVeS8

/* -*- 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 "nsSMILValue.h"
#include "nsDebug.h"
#include <string.h>

//----------------------------------------------------------------------
// Public methods

nsSMILValue::nsSMILValue(const nsISMILType* aType)
  : mType(nsSMILNullType::Singleton())
{
  if (!aType) {
    NS_ERROR("Trying to construct nsSMILValue with null mType pointer");
    return;
  }

  InitAndCheckPostcondition(aType);
}

nsSMILValue::nsSMILValue(const nsSMILValue& aVal)
  : mType(nsSMILNullType::Singleton())
{
  InitAndCheckPostcondition(aVal.mType);
  mType->Assign(*this, aVal);
}

const nsSMILValue&
nsSMILValue::operator=(const nsSMILValue& aVal)
{
  if (&aVal == this)
    return *this;

  if (mType != aVal.mType) {
    DestroyAndReinit(aVal.mType);
  }

  mType->Assign(*this, aVal);

  return *this;
}

// Move constructor / reassignment operator:
nsSMILValue::nsSMILValue(nsSMILValue&& aVal)
  : mU(aVal.mU), // Copying union is only OK because we clear aVal.mType below.
    mType(aVal.mType)
{
  // Leave aVal with a null type, so that it's safely destructible (and won't
  // mess with anything referenced by its union, which we've copied).
  aVal.mType = nsSMILNullType::Singleton();
}

nsSMILValue&
nsSMILValue::operator=(nsSMILValue&& aVal)
{
  if (!IsNull()) {
    // Clean up any data we're currently tracking.
    DestroyAndCheckPostcondition();
  }

  // Copy the union (which could include a pointer to external memory) & mType:
  mU = aVal.mU;
  mType = aVal.mType;

  // Leave aVal with a null type, so that it's safely destructible (and won't
  // mess with anything referenced by its union, which we've now copied).
  aVal.mType = nsSMILNullType::Singleton();

  return *this;
}

bool
nsSMILValue::operator==(const nsSMILValue& aVal) const
{
  if (&aVal == this)
    return true;

  return mType == aVal.mType && mType->IsEqual(*this, aVal);
}

nsresult
nsSMILValue::Add(const nsSMILValue& aValueToAdd, uint32_t aCount)
{
  if (aValueToAdd.mType != mType) {
    NS_ERROR("Trying to add incompatible types");
    return NS_ERROR_FAILURE;
  }

  return mType->Add(*this, aValueToAdd, aCount);
}

nsresult
nsSMILValue::SandwichAdd(const nsSMILValue& aValueToAdd)
{
  if (aValueToAdd.mType != mType) {
    NS_ERROR("Trying to add incompatible types");
    return NS_ERROR_FAILURE;
  }

  return mType->SandwichAdd(*this, aValueToAdd);
}

nsresult
nsSMILValue::ComputeDistance(const nsSMILValue& aTo, double& aDistance) const
{
  if (aTo.mType != mType) {
    NS_ERROR("Trying to calculate distance between incompatible types");
    return NS_ERROR_FAILURE;
  }

  return mType->ComputeDistance(*this, aTo, aDistance);
}

nsresult
nsSMILValue::Interpolate(const nsSMILValue& aEndVal,
                         double aUnitDistance,
                         nsSMILValue& aResult) const
{
  if (aEndVal.mType != mType) {
    NS_ERROR("Trying to interpolate between incompatible types");
    return NS_ERROR_FAILURE;
  }

  if (aResult.mType != mType) {
    // Outparam has wrong type
    aResult.DestroyAndReinit(mType);
  }

  return mType->Interpolate(*this, aEndVal, aUnitDistance, aResult);
}

//----------------------------------------------------------------------
// Helper methods

// Wrappers for nsISMILType::Init & ::Destroy that verify their postconditions
void
nsSMILValue::InitAndCheckPostcondition(const nsISMILType* aNewType)
{
  aNewType->Init(*this);
  MOZ_ASSERT(mType == aNewType,
             "Post-condition of Init failed. nsSMILValue is invalid");
}

void
nsSMILValue::DestroyAndCheckPostcondition()
{
  mType->Destroy(*this);
  MOZ_ASSERT(IsNull(),
             "Post-condition of Destroy failed. "
             "nsSMILValue not null after destroying");
}

void
nsSMILValue::DestroyAndReinit(const nsISMILType* aNewType)
{
  DestroyAndCheckPostcondition();
  InitAndCheckPostcondition(aNewType);
}