зеркало из https://github.com/mozilla/pjs.git
148 строки
4.6 KiB
Plaintext
148 строки
4.6 KiB
Plaintext
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is the Mozilla browser.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 2002 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* Joe Hewitt <hewitt@netscape.com> (Original Author)
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*/
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#import "CHGoMenu.h"
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#import "BrowserWindowController.h"
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#import "CHBrowserWrapper.h"
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#import "CHBrowserView.h"
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#include "nsCOMPtr.h"
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#include "nsString.h"
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#include "nsIWebBrowser.h"
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#include "nsISHistory.h"
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#include "nsIWebNavigation.h"
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#include "nsIHistoryEntry.h"
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#include "nsCRT.h"
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// the tag of the separator after which to insert history menu items
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static const int kDividerTag = 4000;
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// the maximum number of history entry menuitems to display
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static const int kMaxItems = 15;
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// the maximum number of characters in a menu title before cropping it
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static const int kMaxTitleLength = 20;
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@implementation CHGoMenu
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- (void) update
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{
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[self emptyHistoryItems];
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[self addHistoryItems];
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[super update];
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}
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- (nsIWebNavigation*) currentWebNavigation
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{
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// get controller for current window
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BrowserWindowController *controller;
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controller = (BrowserWindowController*)[[NSApp mainWindow] windowController];
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if (!controller) return nsnull;
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// get web navigation for current browser
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CHBrowserWrapper* wrapper = [controller getBrowserWrapper];
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if (!wrapper) return nsnull;
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CHBrowserView* view = [wrapper getBrowserView];
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if (!view) return nsnull;
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nsCOMPtr<nsIWebBrowser> webBrowser = [view getWebBrowser];
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if (!webBrowser) return nsnull;
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nsCOMPtr<nsIWebNavigation> webNav(do_QueryInterface(webBrowser));
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return webNav.get();
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}
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- (void) historyItemAction:(id)sender
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{
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// get web navigation for current browser
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nsCOMPtr<nsIWebNavigation> webNav = [self currentWebNavigation];
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if (!webNav) return;
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// browse to the history entry for the menuitem that was selected
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PRInt32 historyIndex = ([sender tag] - 1) - kDividerTag;
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webNav->GotoIndex(historyIndex);
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}
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- (void) emptyHistoryItems
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{
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// remove every history item after the insertion point
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int insertionIndex = [self indexOfItemWithTag:kDividerTag];
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for (int i = [self numberOfItems]-1; i > insertionIndex ; --i) {
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[self removeItemAtIndex:i];
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}
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}
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- (void) addHistoryItems
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{
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// get session history for current browser
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nsCOMPtr<nsIWebNavigation> webNav = [self currentWebNavigation];
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if (!webNav) return;
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nsCOMPtr<nsISHistory> sessionHistory;
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webNav->GetSessionHistory(getter_AddRefs(sessionHistory));
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PRInt32 count;
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sessionHistory->GetCount(&count);
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PRInt32 currentIndex;
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sessionHistory->GetIndex(¤tIndex);
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// determine the range of items to display
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int rangeStart, rangeEnd;
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int above = kMaxItems/2;
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int below = (kMaxItems-above)-1;
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if (count <= kMaxItems) {
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// if the whole history fits within our menu, fit range to show all
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rangeStart = count-1;
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rangeEnd = 0;
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} else {
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// if the whole history is too large for menu, try to put current index as close to
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// the middle of the list as possible, so the user can see both back and forward in session
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rangeStart = currentIndex + above;
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rangeEnd = currentIndex - below;
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if (rangeStart >= count-1) {
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rangeEnd -= (rangeStart-count)+1; // shift overflow to the end
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rangeStart = count-1;
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} else if (rangeEnd < 0) {
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rangeStart -= rangeEnd; // shift overflow to the start
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rangeEnd = 0;
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}
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}
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// create a new menu item for each history entry (up to MAX_MENUITEM entries)
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for (PRInt32 i = rangeStart; i >= rangeEnd; --i) {
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nsCOMPtr<nsIHistoryEntry> entry;
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sessionHistory->GetEntryAtIndex(i, PR_FALSE, getter_AddRefs(entry));
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PRUnichar *text;
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entry->GetTitle(&text);
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NSString* title = [NSString stringWithCharacters: text length: nsCRT::strlen(text)];
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if ([title length] > kMaxTitleLength) {
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}
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NSMenuItem *newItem = [self addItemWithTitle:title action:@selector(historyItemAction:) keyEquivalent:@""];
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[newItem setTarget:self];
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[newItem setTag:kDividerTag+1+i];
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if (currentIndex == i)
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[newItem setState:NSOnState];
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}
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}
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@end
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