author Stone Shih <>
Fri, 11 Nov 2016 18:02:37 +0800
changeset 370264 038de5add834684bcb9cfe709df3a5868f7e54b7
parent 370017 948aee86bbf4867d6b67b5c24ce1dcef5437db91
child 380320 70738570669561eee79f6ed74a8121e0668edbcb
permissions -rw-r--r--
Bug 1315862 Part1: Stop dispatching pointer events in the system group. r=masayuki,smaug MozReview-Commit-ID: 8Xqp3bxlRFt

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 */

#include "nsGfxButtonControlFrame.h"
#include "nsIFormControl.h"
#include "nsGkAtoms.h"
#include "mozilla/StyleSetHandle.h"
#include "mozilla/StyleSetHandleInlines.h"
#include "mozilla/dom/HTMLInputElement.h"
#include "nsContentUtils.h"
// MouseEvent suppression in PP
#include "nsContentList.h"

#include "nsIDOMHTMLInputElement.h"
#include "nsTextNode.h"

using namespace mozilla;

nsGfxButtonControlFrame::nsGfxButtonControlFrame(nsStyleContext* aContext):

NS_NewGfxButtonControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
  return new (aPresShell) nsGfxButtonControlFrame(aContext);


void nsGfxButtonControlFrame::DestroyFrom(nsIFrame* aDestructRoot)

nsGfxButtonControlFrame::GetType() const
  return nsGkAtoms::gfxButtonControlFrame;

nsGfxButtonControlFrame::GetFrameName(nsAString& aResult) const
  return MakeFrameName(NS_LITERAL_STRING("ButtonControl"), aResult);

// Create the text content used as label for the button.
// The frame will be generated by the frame constructor.
nsGfxButtonControlFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
  nsXPIDLString label;

  // Add a child text content node for the label
  mTextContent = new nsTextNode(mContent->NodeInfo()->NodeInfoManager());

  // set the value of the text node and add it to the child list
  mTextContent->SetText(label, false);

  return NS_OK;

nsGfxButtonControlFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
                                                  uint32_t aFilter)
  if (mTextContent) {

// Create the text content used as label for the button.
// The frame will be generated by the frame constructor.
nsGfxButtonControlFrame::CreateFrameFor(nsIContent*      aContent)
  nsIFrame * newFrame = nullptr;

  if (aContent == mTextContent) {
    nsContainerFrame* parentFrame = do_QueryFrame(mFrames.FirstChild());

    nsPresContext* presContext = PresContext();
    RefPtr<nsStyleContext> textStyleContext;
    textStyleContext = presContext->StyleSet()->
      ResolveStyleForText(mTextContent, mStyleContext);

    newFrame = NS_NewTextFrame(presContext->PresShell(), textStyleContext);
    // initialize the text frame
    newFrame->Init(mTextContent, parentFrame, nullptr);

  return newFrame;


// Initially we hardcoded the default strings here.
// Next, we used html.css to store the default label for various types
// of buttons. (nsGfxButtonControlFrame::DoNavQuirksReflow rev 1.20)
// However, since html.css is not internationalized, we now grab the default
// label from a string bundle as is done for all other UI strings.
// See bug 16999 for further details.
nsGfxButtonControlFrame::GetDefaultLabel(nsXPIDLString& aString) const
  nsCOMPtr<nsIFormControl> form = do_QueryInterface(mContent);

  int32_t type = form->GetType();
  const char *prop;
  if (type == NS_FORM_INPUT_RESET) {
    prop = "Reset";
  else if (type == NS_FORM_INPUT_SUBMIT) {
    prop = "Submit";
  else {
    return NS_OK;

  return nsContentUtils::GetLocalizedString(nsContentUtils::eFORMS_PROPERTIES,
                                            prop, aString);

nsGfxButtonControlFrame::GetLabel(nsXPIDLString& aLabel)
  // Get the text from the "value" property on our content if there is
  // one; otherwise set it to a default value (localized).
  dom::HTMLInputElement* elt = dom::HTMLInputElement::FromContent(mContent);
  if (mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::value) && elt) {
    elt->GetValue(aLabel, dom::CallerType::System);
  } else {
    // Generate localized label.
    // We can't make any assumption as to what the default would be
    // because the value is localized for non-english platforms, thus
    // it might not be the string "Reset", "Submit Query", or "Browse..."
    nsresult rv;
    rv = GetDefaultLabel(aLabel);
    NS_ENSURE_SUCCESS(rv, rv);

  // Compress whitespace out of label if needed.
  if (!StyleText()->WhiteSpaceIsSignificant()) {
  } else if (aLabel.Length() > 2 && aLabel.First() == ' ' &&
             aLabel.CharAt(aLabel.Length() - 1) == ' ') {
    // This is a bit of a hack.  The reason this is here is as follows: we now
    // have default padding on our buttons to make them non-ugly.
    // Unfortunately, IE-windows does not have such padding, so people will
    // stick values like " ok " (with the spaces) in the buttons in an attempt
    // to make them look decent.  Unfortunately, if they do this the button
    // looks way too big in Mozilla.  Worse yet, if they do this _and_ set a
    // fixed width for the button we run into trouble because our focus-rect
    // border/padding and outer border take up 10px of the horizontal button
    // space or so; the result is that the text is misaligned, even with the
    // recentering we do in nsHTMLButtonControlFrame::Reflow.  So to solve
    // this, even if the whitespace is significant, single leading and trailing
    // _spaces_ (and not other whitespace) are removed.  The proper solution,
    // of course, is to not have the focus rect painting taking up 6px of
    // horizontal space. We should do that instead (via XBL form controls or
    // changing the renderer) and remove this.
    aLabel.Cut(0, 1);
    aLabel.Truncate(aLabel.Length() - 1);

  return NS_OK;

nsGfxButtonControlFrame::AttributeChanged(int32_t         aNameSpaceID,
                                          nsIAtom*        aAttribute,
                                          int32_t         aModType)
  nsresult rv = NS_OK;

  // If the value attribute is set, update the text of the label
  if (nsGkAtoms::value == aAttribute) {
    if (mTextContent && mContent) {
      nsXPIDLString label;
      rv = GetLabel(label);
      NS_ENSURE_SUCCESS(rv, rv);
      mTextContent->SetText(label, true);
    } else {

  // defer to HTMLButtonControlFrame
  } else {
    rv = nsHTMLButtonControlFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
  return rv;

nsGfxButtonControlFrame::IsLeaf() const
  return true;

  return this;

nsGfxButtonControlFrame::HandleEvent(nsPresContext* aPresContext, 
                                     WidgetGUIEvent* aEvent,
                                     nsEventStatus* aEventStatus)
  // Override the HandleEvent to prevent the nsFrame::HandleEvent
  // from being called. The nsFrame::HandleEvent causes the button label
  // to be selected (Drawn with an XOR rectangle over the label)

  // do we have user-input style?
  const nsStyleUserInterface* uiStyle = StyleUserInterface();
  if (uiStyle->mUserInput == StyleUserInput::None ||
      uiStyle->mUserInput == StyleUserInput::Disabled) {
    return nsFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
  return NS_OK;