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