widget/DimensionRequest.cpp

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #include "DimensionRequest.h"
   6
   7 #include "nsIBaseWindow.h"
   8 #include "nsIDocShellTreeOwner.h"
   9
  10 namespace mozilla {
  11
  12 nsresult DimensionRequest::SupplementFrom(nsIBaseWindow* aSource) {
  13   NS_ENSURE_ARG_POINTER(aSource);
  14   int32_t x = 0, y = 0, width = 0, height = 0;
  15
  16   bool needsPosition = mX.isSome() != mY.isSome();
  17   bool needsSize = mWidth.isSome() != mHeight.isSome();
  18
  19   if (!needsPosition && !needsSize) {
  20     return NS_OK;
  21   }
  22
  23   MOZ_TRY(aSource->GetDimensions(mDimensionKind, needsPosition ? &x : nullptr,
  24                                  needsPosition ? &y : nullptr,
  25                                  needsSize ? &width : nullptr,
  26                                  needsSize ? &height : nullptr));
  27
  28   if (needsPosition) {
  29     if (mX.isNothing()) {
  30       mX.emplace(x);
  31     }
  32     if (mY.isNothing()) {
  33       mY.emplace(y);
  34     }
  35   }
  36   if (needsSize) {
  37     if (mWidth.isNothing()) {
  38       mWidth.emplace(width);
  39     }
  40     if (mHeight.isNothing()) {
  41       mHeight.emplace(height);
  42     }
  43   }
  44
  45   MOZ_ASSERT(mX.isSome() == mY.isSome());
  46   MOZ_ASSERT(mWidth.isSome() == mHeight.isSome());
  47   return NS_OK;
  48 }
  49
  50 nsresult DimensionRequest::ApplyOuterTo(nsIBaseWindow* aTarget) {
  51   NS_ENSURE_ARG_POINTER(aTarget);
  52   MOZ_ASSERT(mX.isSome() == mY.isSome(),
  53              "Missing dimensions should have been completed.");
  54   MOZ_ASSERT(mWidth.isSome() == mHeight.isSome(),
  55              "Missing dimensions should have been completed.");
  56   if (mDimensionKind != DimensionKind::Outer) {
  57     MOZ_ASSERT_UNREACHABLE("Expected outer dimensions.");
  58     return NS_ERROR_UNEXPECTED;
  59   }
  60
  61   bool havePosition = mX.isSome() && mY.isSome();
  62   bool haveSize = mWidth.isSome() && mHeight.isSome();
  63
  64   if (!havePosition && !haveSize) {
  65     return NS_OK;
  66   }
  67
  68   if (havePosition && haveSize) {
  69     return aTarget->SetPositionAndSize(*mX, *mY, *mWidth, *mHeight, true);
  70   }
  71
  72   if (havePosition) {
  73     return aTarget->SetPosition(*mX, *mY);
  74   }
  75
  76   if (haveSize) {
  77     return aTarget->SetSize(*mWidth, *mHeight, true);
  78   }
  79
  80   MOZ_ASSERT_UNREACHABLE();
  81   return NS_ERROR_UNEXPECTED;
  82 }
  83
  84 nsresult DimensionRequest::ApplyInnerTo(nsIDocShellTreeOwner* aTarget,
  85                                         bool aAsRootShell) {
  86   NS_ENSURE_ARG_POINTER(aTarget);
  87   MOZ_ASSERT(mX.isSome() == mY.isSome(),
  88              "Missing dimensions should have been completed.");
  89   MOZ_ASSERT(mWidth.isSome() == mHeight.isSome(),
  90              "Missing dimensions should have been completed.");
  91   if (mDimensionKind != DimensionKind::Inner) {
  92     MOZ_ASSERT_UNREACHABLE("Expected inner dimensions.");
  93     return NS_ERROR_UNEXPECTED;
  94   }
  95
  96   bool havePosition = mX.isSome() && mY.isSome();
  97   bool haveSize = mWidth.isSome() && mHeight.isSome();
  98
  99   if (!havePosition && !haveSize) {
 100     return NS_OK;
 101   }
 102
 103   if (havePosition) {
 104     MOZ_ASSERT_UNREACHABLE("Inner position is not implemented.");
 105     return NS_ERROR_NOT_IMPLEMENTED;
 106   }
 107
 108   if (haveSize) {
 109     if (aAsRootShell) {
 110       return aTarget->SetRootShellSize(*mWidth, *mHeight);
 111     }
 112     return aTarget->SetPrimaryContentSize(*mWidth, *mHeight);
 113   }
 114
 115   MOZ_ASSERT_UNREACHABLE();
 116   return NS_ERROR_UNEXPECTED;
 117 }
 118
 119 }  // namespace mozilla