gecko-dev/dom/base/nsBarProps.cpp

342 строки
8.4 KiB
C++

/* -*- 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 "nsBarProps.h"
#include "nsCOMPtr.h"
#include "nscore.h"
#include "nsGlobalWindow.h"
#include "nsStyleConsts.h"
#include "nsIDocShell.h"
#include "nsIScriptSecurityManager.h"
#include "nsIScrollable.h"
#include "nsIWebBrowserChrome.h"
#include "nsIDOMWindow.h"
#include "nsDOMClassInfoID.h"
//
// Basic (virtual) BarProp class implementation
//
nsBarProp::nsBarProp(nsGlobalWindow *aWindow)
{
mDOMWindow = aWindow;
nsISupports *supwin = static_cast<nsIScriptGlobalObject *>(aWindow);
mDOMWindowWeakref = do_GetWeakReference(supwin);
}
nsBarProp::~nsBarProp()
{
}
DOMCI_DATA(BarProp, nsBarProp)
// QueryInterface implementation for BarProp
NS_INTERFACE_MAP_BEGIN(nsBarProp)
NS_INTERFACE_MAP_ENTRY(nsIDOMBarProp)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(BarProp)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(nsBarProp)
NS_IMPL_RELEASE(nsBarProp)
NS_IMETHODIMP
nsBarProp::GetVisibleByFlag(bool *aVisible, PRUint32 aChromeFlag)
{
*aVisible = false;
nsCOMPtr<nsIWebBrowserChrome> browserChrome = GetBrowserChrome();
NS_ENSURE_TRUE(browserChrome, NS_OK);
PRUint32 chromeFlags;
NS_ENSURE_SUCCESS(browserChrome->GetChromeFlags(&chromeFlags),
NS_ERROR_FAILURE);
if (chromeFlags & aChromeFlag)
*aVisible = true;
return NS_OK;
}
NS_IMETHODIMP
nsBarProp::SetVisibleByFlag(bool aVisible, PRUint32 aChromeFlag)
{
nsCOMPtr<nsIWebBrowserChrome> browserChrome = GetBrowserChrome();
NS_ENSURE_TRUE(browserChrome, NS_OK);
bool enabled = false;
nsCOMPtr<nsIScriptSecurityManager>
securityManager(do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID));
if (securityManager)
securityManager->IsCapabilityEnabled("UniversalXPConnect", &enabled);
if (!enabled)
return NS_OK;
PRUint32 chromeFlags;
NS_ENSURE_SUCCESS(browserChrome->GetChromeFlags(&chromeFlags),
NS_ERROR_FAILURE);
if (aVisible)
chromeFlags |= aChromeFlag;
else
chromeFlags &= ~aChromeFlag;
NS_ENSURE_SUCCESS(browserChrome->SetChromeFlags(chromeFlags),
NS_ERROR_FAILURE);
return NS_OK;
}
already_AddRefed<nsIWebBrowserChrome>
nsBarProp::GetBrowserChrome()
{
// Check that the window is still alive.
nsCOMPtr<nsIDOMWindow> domwin(do_QueryReferent(mDOMWindowWeakref));
if (!domwin)
return nsnull;
nsIWebBrowserChrome *browserChrome = nsnull;
mDOMWindow->GetWebBrowserChrome(&browserChrome);
return browserChrome;
}
//
// MenubarProp class implementation
//
nsMenubarProp::nsMenubarProp(nsGlobalWindow *aWindow)
: nsBarProp(aWindow)
{
}
nsMenubarProp::~nsMenubarProp()
{
}
NS_IMETHODIMP
nsMenubarProp::GetVisible(bool *aVisible)
{
return nsBarProp::GetVisibleByFlag(aVisible,
nsIWebBrowserChrome::CHROME_MENUBAR);
}
NS_IMETHODIMP
nsMenubarProp::SetVisible(bool aVisible)
{
return nsBarProp::SetVisibleByFlag(aVisible,
nsIWebBrowserChrome::CHROME_MENUBAR);
}
//
// ToolbarProp class implementation
//
nsToolbarProp::nsToolbarProp(nsGlobalWindow *aWindow)
: nsBarProp(aWindow)
{
}
nsToolbarProp::~nsToolbarProp()
{
}
NS_IMETHODIMP
nsToolbarProp::GetVisible(bool *aVisible)
{
return nsBarProp::GetVisibleByFlag(aVisible,
nsIWebBrowserChrome::CHROME_TOOLBAR);
}
NS_IMETHODIMP
nsToolbarProp::SetVisible(bool aVisible)
{
return nsBarProp::SetVisibleByFlag(aVisible,
nsIWebBrowserChrome::CHROME_TOOLBAR);
}
//
// LocationbarProp class implementation
//
nsLocationbarProp::nsLocationbarProp(nsGlobalWindow *aWindow)
: nsBarProp(aWindow)
{
}
nsLocationbarProp::~nsLocationbarProp()
{
}
NS_IMETHODIMP
nsLocationbarProp::GetVisible(bool *aVisible)
{
return
nsBarProp::GetVisibleByFlag(aVisible,
nsIWebBrowserChrome::CHROME_LOCATIONBAR);
}
NS_IMETHODIMP
nsLocationbarProp::SetVisible(bool aVisible)
{
return
nsBarProp::SetVisibleByFlag(aVisible,
nsIWebBrowserChrome::CHROME_LOCATIONBAR);
}
//
// PersonalbarProp class implementation
//
nsPersonalbarProp::nsPersonalbarProp(nsGlobalWindow *aWindow)
: nsBarProp(aWindow)
{
}
nsPersonalbarProp::~nsPersonalbarProp()
{
}
NS_IMETHODIMP
nsPersonalbarProp::GetVisible(bool *aVisible)
{
return
nsBarProp::GetVisibleByFlag(aVisible,
nsIWebBrowserChrome::CHROME_PERSONAL_TOOLBAR);
}
NS_IMETHODIMP
nsPersonalbarProp::SetVisible(bool aVisible)
{
return
nsBarProp::SetVisibleByFlag(aVisible,
nsIWebBrowserChrome::CHROME_PERSONAL_TOOLBAR);
}
//
// StatusbarProp class implementation
//
nsStatusbarProp::nsStatusbarProp(nsGlobalWindow *aWindow)
: nsBarProp(aWindow)
{
}
nsStatusbarProp::~nsStatusbarProp()
{
}
NS_IMETHODIMP
nsStatusbarProp::GetVisible(bool *aVisible)
{
return nsBarProp::GetVisibleByFlag(aVisible,
nsIWebBrowserChrome::CHROME_STATUSBAR);
}
NS_IMETHODIMP
nsStatusbarProp::SetVisible(bool aVisible)
{
return nsBarProp::SetVisibleByFlag(aVisible,
nsIWebBrowserChrome::CHROME_STATUSBAR);
}
//
// ScrollbarsProp class implementation
//
nsScrollbarsProp::nsScrollbarsProp(nsGlobalWindow *aWindow)
: nsBarProp(aWindow)
{
}
nsScrollbarsProp::~nsScrollbarsProp()
{
}
NS_IMETHODIMP
nsScrollbarsProp::GetVisible(bool *aVisible)
{
*aVisible = true; // one assumes
nsCOMPtr<nsIDOMWindow> domwin(do_QueryReferent(mDOMWindowWeakref));
if (domwin) { // dom window not deleted
nsCOMPtr<nsIScrollable> scroller =
do_QueryInterface(mDOMWindow->GetDocShell());
if (scroller) {
PRInt32 prefValue;
scroller->GetDefaultScrollbarPreferences(
nsIScrollable::ScrollOrientation_Y, &prefValue);
if (prefValue == nsIScrollable::Scrollbar_Never) // try the other way
scroller->GetDefaultScrollbarPreferences(
nsIScrollable::ScrollOrientation_X, &prefValue);
if (prefValue == nsIScrollable::Scrollbar_Never)
*aVisible = false;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsScrollbarsProp::SetVisible(bool aVisible)
{
bool enabled = false;
nsCOMPtr<nsIScriptSecurityManager>
securityManager(do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID));
if (securityManager)
securityManager->IsCapabilityEnabled("UniversalXPConnect", &enabled);
if (!enabled)
return NS_OK;
/* Scrollbars, unlike the other barprops, implement visibility directly
rather than handing off to the superclass (and from there to the
chrome window) because scrollbar visibility uniquely applies only
to the window making the change (arguably. it does now, anyway.)
and because embedding apps have no interface for implementing this
themselves, and therefore the implementation must be internal. */
nsCOMPtr<nsIDOMWindow> domwin(do_QueryReferent(mDOMWindowWeakref));
if (domwin) { // dom window must still exist. use away.
nsCOMPtr<nsIScrollable> scroller =
do_QueryInterface(mDOMWindow->GetDocShell());
if (scroller) {
PRInt32 prefValue;
if (aVisible) {
prefValue = nsIScrollable::Scrollbar_Auto;
} else {
prefValue = nsIScrollable::Scrollbar_Never;
}
scroller->SetDefaultScrollbarPreferences(
nsIScrollable::ScrollOrientation_Y, prefValue);
scroller->SetDefaultScrollbarPreferences(
nsIScrollable::ScrollOrientation_X, prefValue);
}
}
/* Notably absent is the part where we notify the chrome window using
GetBrowserChrome()->SetChromeFlags(). Given the possibility of multiple
DOM windows (multiple top-level windows, even) within a single
chrome window, the historical concept of a single "has scrollbars"
flag in the chrome is inapplicable, and we can't tell at this level
whether we represent the particular DOM window that makes this decision
for the chrome.
So only this object (and its corresponding DOM window) knows whether
scrollbars are visible. The corresponding chrome window will need to
ask (one of) its DOM window(s) when it needs to know about scrollbar
visibility, rather than caching its own copy of that information.
*/
return NS_OK;
}