widget/nsBaseClipboard.cpp
author Mike Hommey <mh+mozilla@glandium.org>
Fri, 23 Jun 2017 15:05:06 +0900
changeset 366422 374900b2142af725d4136758ac00dce2fbb824be
parent 309876 623c48bf36a47ba035c882b18696026c934ce0cc
child 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1375798 - Reorganize the library_name_info function. r=mshal The function as it currently is matches how things were done in old-configure.in. However, that's just confusing and hard to follow. In fact, the unit test failing numerous times while writing this patch pretty much highlights the problem. So instead of a confusing set of overrides to the prefixes and suffixes, spell out the whole set for each set of platforms. This also happens to make the function shorter. Win/win. At the same time, we normalize the function output as a nested namespace, where we get, for each of dll, lib, import_lib, etc. a prefix/suffix pair. Further down the road, we can imagine changing those to class instances with a method allowing to format file names based on those prefix/suffixes.

/* -*- 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 http://mozilla.org/MPL/2.0/. */

#include "nsBaseClipboard.h"

#include "nsIClipboardOwner.h"
#include "nsCOMPtr.h"
#include "nsXPCOM.h"
#include "nsISupportsPrimitives.h"

nsBaseClipboard::nsBaseClipboard()
  : mEmptyingForSetData(false)
  , mIgnoreEmptyNotification(false)
{
}

nsBaseClipboard::~nsBaseClipboard()
{
  EmptyClipboard(kSelectionClipboard);
  EmptyClipboard(kGlobalClipboard);
  EmptyClipboard(kFindClipboard);
}

NS_IMPL_ISUPPORTS(nsBaseClipboard, nsIClipboard)

/**
  * Sets the transferable object
  *
  */
NS_IMETHODIMP nsBaseClipboard::SetData(nsITransferable * aTransferable, nsIClipboardOwner * anOwner,
                                        int32_t aWhichClipboard)
{
  NS_ASSERTION ( aTransferable, "clipboard given a null transferable" );

  if (aTransferable == mTransferable && anOwner == mClipboardOwner)
    return NS_OK;
  bool selectClipPresent;
  SupportsSelectionClipboard(&selectClipPresent);
  bool findClipPresent;
  SupportsFindClipboard(&findClipPresent);
  if ( !selectClipPresent && !findClipPresent && aWhichClipboard != kGlobalClipboard )
    return NS_ERROR_FAILURE;

  mEmptyingForSetData = true;
  EmptyClipboard(aWhichClipboard);
  mEmptyingForSetData = false;

  mClipboardOwner = anOwner;
  mTransferable = aTransferable;

  nsresult rv = NS_ERROR_FAILURE;
  if (mTransferable) {
    rv = SetNativeClipboardData(aWhichClipboard);
  }

  return rv;
}

/**
  * Gets the transferable object
  *
  */
NS_IMETHODIMP nsBaseClipboard::GetData(nsITransferable * aTransferable, int32_t aWhichClipboard)
{
  NS_ASSERTION ( aTransferable, "clipboard given a null transferable" );

  bool selectClipPresent;
  SupportsSelectionClipboard(&selectClipPresent);
  bool findClipPresent;
  SupportsFindClipboard(&findClipPresent);
  if ( !selectClipPresent && !findClipPresent && aWhichClipboard != kGlobalClipboard )
    return NS_ERROR_FAILURE;

  if ( aTransferable )
    return GetNativeClipboardData(aTransferable, aWhichClipboard);

  return NS_ERROR_FAILURE;
}

NS_IMETHODIMP nsBaseClipboard::EmptyClipboard(int32_t aWhichClipboard)
{
  bool selectClipPresent;
  SupportsSelectionClipboard(&selectClipPresent);
  bool findClipPresent;
  SupportsFindClipboard(&findClipPresent);
  if (!selectClipPresent && !findClipPresent && aWhichClipboard != kGlobalClipboard)
    return NS_ERROR_FAILURE;

  if (mIgnoreEmptyNotification)
    return NS_OK;

  if (mClipboardOwner) {
    mClipboardOwner->LosingOwnership(mTransferable);
    mClipboardOwner = nullptr;
  }

  mTransferable = nullptr;
  return NS_OK;
}

NS_IMETHODIMP
nsBaseClipboard::HasDataMatchingFlavors(const char** aFlavorList,
                                        uint32_t aLength,
                                        int32_t aWhichClipboard,
                                        bool* outResult) 
{
  *outResult = true;  // say we always do.
  return NS_OK;
}

NS_IMETHODIMP
nsBaseClipboard::SupportsSelectionClipboard(bool* _retval)
{
  *_retval = false;   // we don't support the selection clipboard by default.
  return NS_OK;
}

NS_IMETHODIMP
nsBaseClipboard::SupportsFindClipboard(bool* _retval)
{
  *_retval = false;   // we don't support the find clipboard by default.
  return NS_OK;
}