Ziele Untersuchung
mit Columbo Integrität von
Datenbanken Interaktion und
Portierbarkeit Ergonomie der
Schnittstellen

Angebot Produkte Projekt Beratung

Mittel Analytik Modellierung Sprachen Algebra Logik Hardware Denken Kreativität

Zusammenhänge Gesellschaft Wirtschaft Branche Firma


products/sources/formale Sprachen/C/Firefox/layout/forms/ (Browser von der Mozilla Stiftung Version 136.0.1^©) Datei vom 10.2.2025 mit Größe 6 kB

Quelle nsGfxButtonControlFrame.cpp Sprache: C

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 http://mozilla.org/MPL/2.0/. */

#include "nsGfxButtonControlFrame.h"
#include "nsIFormControl.h"
#include "nsGkAtoms.h"
#include "mozilla/PresShell.h"
#include "mozilla/dom/HTMLInputElement.h"
#include "nsContentUtils.h"
#include "nsTextNode.h"

using namespace mozilla;

nsGfxButtonControlFrame::nsGfxButtonControlFrame(ComputedStyle* aStyle,
                                                 nsPresContext* aPresContext)
    : nsHTMLButtonControlFrame(aStyle, aPresContext, kClassID) {}

nsContainerFrame* NS_NewGfxButtonControlFrame(PresShell* aPresShell,
                                              ComputedStyle* aStyle) {
  return new (aPresShell)
      nsGfxButtonControlFrame(aStyle, aPresShell->GetPresContext());
}

NS_IMPL_FRAMEARENA_HELPERS(nsGfxButtonControlFrame)

void nsGfxButtonControlFrame::Destroy(DestroyContext& aContext) {
  aContext.AddAnonymousContent(mTextContent.forget());
  nsHTMLButtonControlFrame::Destroy(aContext);
}

#ifdef DEBUG_FRAME_DUMP
nsresult nsGfxButtonControlFrame::GetFrameName(nsAString& aResult) const {
  return MakeFrameName(u"ButtonControl"_ns, aResult);
}
#endif

// Create the text content used as label for the button.
// The frame will be generated by the frame constructor.
nsresult nsGfxButtonControlFrame::CreateAnonymousContent(
    nsTArray<ContentInfo>& aElements) {
  nsAutoString label;
  nsresult rv = GetLabel(label);
  NS_ENSURE_SUCCESS(rv, rv);

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

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

  return NS_OK;
}

void nsGfxButtonControlFrame::AppendAnonymousContentTo(
    nsTArray<nsIContent*>& aElements, uint32_t aFilter) {
  if (mTextContent) {
    aElements.AppendElement(mTextContent);
  }
}

NS_QUERYFRAME_HEAD(nsGfxButtonControlFrame)
  NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
NS_QUERYFRAME_TAIL_INHERITING(nsHTMLButtonControlFrame)

// 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.
nsresult nsGfxButtonControlFrame::GetDefaultLabel(nsAString& aString) const {
  const auto* form = nsIFormControl::FromNodeOrNull(mContent);
  NS_ENSURE_TRUE(form, NS_ERROR_UNEXPECTED);

  auto type = form->ControlType();
  const char* prop;
  if (type == FormControlType::InputReset) {
    prop = "Reset";
  } else if (type == FormControlType::InputSubmit) {
    prop = "Submit";
  } else {
    aString.Truncate();
    return NS_OK;
  }

  return nsContentUtils::GetMaybeLocalizedString(
      nsContentUtils::eFORMS_PROPERTIES, prop, mContent->OwnerDoc(), aString);
}

nsresult nsGfxButtonControlFrame::GetLabel(nsString& aLabel) {
  // Get the text from the "value" property on our content if there is
  // one; otherwise set it to a default value (localized).
  auto* elt = dom::HTMLInputElement::FromNode(mContent);
  if (elt && elt->HasAttr(nsGkAtoms::value)) {
    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()) {
    aLabel.CompressWhitespace();
  } 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 (changing the renderer) and
    // remove this.
    aLabel.Cut(0, 1);
    aLabel.Truncate(aLabel.Length() - 1);
  }

  return NS_OK;
}

nsresult nsGfxButtonControlFrame::AttributeChanged(int32_t aNameSpaceID,
                                                   nsAtom* 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) {
      nsAutoString label;
      rv = GetLabel(label);
      NS_ENSURE_SUCCESS(rv, rv);

      mTextContent->SetText(label, true);
    } else {
      rv = NS_ERROR_UNEXPECTED;
    }

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

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

  if (IsContentDisabled()) {
    return nsIFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
  }
  return NS_OK;
}

quality100%

¤ Dauer der Verarbeitung: 0.13 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.