layout/forms/nsColorControlFrame.cpp

   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/. */
   5
   6 #include "nsColorControlFrame.h"
   7
   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"
  17 #include "nsIDocument.h"
  18
  19 using mozilla::dom::Element;
  20
  21 nsColorControlFrame::nsColorControlFrame(nsStyleContext* aContext):
  22   nsColorControlFrameSuper(aContext)
  23 {
  24 }
  25
  26 nsIFrame*
  27 NS_NewColorControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
  28 {
  29   return new (aPresShell) nsColorControlFrame(aContext);
  30 }
  31
  32 NS_IMPL_FRAMEARENA_HELPERS(nsColorControlFrame)
  33
  34 NS_QUERYFRAME_HEAD(nsColorControlFrame)
  35   NS_QUERYFRAME_ENTRY(nsColorControlFrame)
  36   NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
  37 NS_QUERYFRAME_TAIL_INHERITING(nsColorControlFrameSuper)
  38
  39
  40 void nsColorControlFrame::DestroyFrom(nsIFrame* aDestructRoot)
  41 {
  42   nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
  43   nsContentUtils::DestroyAnonymousContent(&mColorContent);
  44   nsColorControlFrameSuper::DestroyFrom(aDestructRoot);
  45 }
  46
  47 nsIAtom*
  48 nsColorControlFrame::GetType() const
  49 {
  50   return nsGkAtoms::colorControlFrame;
  51 }
  52
  53 #ifdef DEBUG_FRAME_DUMP
  54 nsresult
  55 nsColorControlFrame::GetFrameName(nsAString& aResult) const
  56 {
  57   return MakeFrameName(NS_LITERAL_STRING("ColorControl"), aResult);
  58 }
  59 #endif
  60
  61 // Create the color area for the button.
  62 // The frame will be generated by the frame constructor.
  63 nsresult
  64 nsColorControlFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
  65 {
  66   nsCOMPtr<nsIDocument> doc = mContent->GetComposedDoc();
  67   mColorContent = doc->CreateHTMLElement(nsGkAtoms::div);
  68
  69   // Mark the element to be native anonymous before setting any attributes.
  70   mColorContent->SetIsNativeAnonymousRoot();
  71
  72   nsresult rv = UpdateColor();
  73   NS_ENSURE_SUCCESS(rv, rv);
  74
  75   nsCSSPseudoElements::Type pseudoType = nsCSSPseudoElements::ePseudo_mozColorSwatch;
  76   nsRefPtr<nsStyleContext> newStyleContext = PresContext()->StyleSet()->
  77     ResolvePseudoElementStyle(mContent->AsElement(), pseudoType,
  78                               StyleContext(), mColorContent->AsElement());
  79   if (!aElements.AppendElement(ContentInfo(mColorContent, newStyleContext))) {
  80     return NS_ERROR_OUT_OF_MEMORY;
  81   }
  82
  83   return NS_OK;
  84 }
  85
  86 void
  87 nsColorControlFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
  88                                               uint32_t aFilter)
  89 {
  90   if (mColorContent) {
  91     aElements.AppendElement(mColorContent);
  92   }
  93 }
  94
  95 nsresult
  96 nsColorControlFrame::UpdateColor()
  97 {
  98   // Get the color from the "value" property of our content; it will return the
  99   // default color (through the sanitization algorithm) if there is none.
 100   nsAutoString color;
 101   nsCOMPtr<nsIDOMHTMLInputElement> elt = do_QueryInterface(mContent);
 102   elt->GetValue(color);
 103   MOZ_ASSERT(!color.IsEmpty(),
 104              "Content node's GetValue() should return a valid color string "
 105              "(the default color, in case no valid color is set)");
 106
 107   // Set the background-color style property of the swatch element to this color
 108   return mColorContent->SetAttr(kNameSpaceID_None, nsGkAtoms::style,
 109       NS_LITERAL_STRING("background-color:") + color, true);
 110 }
 111
 112 nsresult
 113 nsColorControlFrame::AttributeChanged(int32_t  aNameSpaceID,
 114                                       nsIAtom* aAttribute,
 115                                       int32_t  aModType)
 116 {
 117   NS_ASSERTION(mColorContent, "The color div must exist");
 118
 119   // If the value attribute is set, update the color box, but only if we're
 120   // still a color control, which might not be the case if the type attribute
 121   // was removed/changed.
 122   nsCOMPtr<nsIFormControl> fctrl = do_QueryInterface(GetContent());
 123   if (fctrl->GetType() == NS_FORM_INPUT_COLOR &&
 124       aNameSpaceID == kNameSpaceID_None && nsGkAtoms::value == aAttribute) {
 125     UpdateColor();
 126   }
 127   return nsColorControlFrameSuper::AttributeChanged(aNameSpaceID, aAttribute,
 128                                                     aModType);
 129 }
 130
 131 nsContainerFrame*
 132 nsColorControlFrame::GetContentInsertionFrame()
 133 {
 134   return this;
 135 }
 136
 137 Element*
 138 nsColorControlFrame::GetPseudoElement(nsCSSPseudoElements::Type aType)
 139 {
 140   if (aType == nsCSSPseudoElements::ePseudo_mozColorSwatch) {
 141     return mColorContent;
 142   }
 143
 144   return nsContainerFrame::GetPseudoElement(aType);
 145 }