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