Merge pull request #176 from grendello/RichTextView_Mac
Implemented RichTextViewBackend for Mac
This commit is contained in:
Lluis Sanchez
Коммит
b750c315d9
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@ -116,6 +116,7 @@
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<Compile Include="Xwt.Mac\ListBoxBackend.cs" />
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<Compile Include="Xwt.Mac\DialogBackend.cs" />
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<Compile Include="Xwt.Mac\MacSystemInformation.cs" />
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<Compile Include="Xwt.Mac\RichTextViewBackend.cs" />
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</ItemGroup>
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<Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
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<ItemGroup>
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@ -108,6 +108,7 @@ namespace Xwt.Mac
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RegisterBackend <Xwt.Backends.IMenuButtonBackend, MenuButtonBackend> ();
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RegisterBackend <Xwt.Backends.IListBoxBackend, ListBoxBackend> ();
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RegisterBackend <Xwt.Backends.IDialogBackend, DialogBackend> ();
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RegisterBackend <Xwt.Backends.IRichTextViewBackend, RichTextViewBackend> ();
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}
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public override void RunApplication ()
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@ -0,0 +1,352 @@
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//
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// RichTextViewBackend.cs
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//
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// Author:
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// Marek Habersack <grendel@xamarin.com>
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//
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// Copyright (c) 2013 Xamarin, Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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using System;
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using System.Collections.Generic;
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using System.Runtime.InteropServices;
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using System.Text;
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using System.Xml;
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using MonoMac.Foundation;
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using MonoMac.AppKit;
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using MonoMac.ObjCRuntime;
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using Xwt;
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using Xwt.Backends;
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namespace Xwt.Mac
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{
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public class RichTextViewBackend : ViewBackend <NSTextView, IRichTextViewEventSink>, IRichTextViewBackend
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{
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public RichTextViewBackend ()
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{
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}
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public override void Initialize ()
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{
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base.Initialize ();
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ViewObject = new MacTextView (EventSink, ApplicationContext);
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}
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public IRichTextBuffer CreateBuffer ()
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{
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return new MacRichTextBuffer ();
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}
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public void SetBuffer (IRichTextBuffer buffer)
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{
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var macBuffer = buffer as MacRichTextBuffer;
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if (macBuffer == null)
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throw new ArgumentException ("Passed buffer is of incorrect type", "buffer");
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var tview = ViewObject as MacTextView;
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if (tview == null)
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return;
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tview.TextStorage.SetString (macBuffer.ToAttributedString ());
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ResetFittingSize ();
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}
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public override void EnableEvent (object eventId)
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{
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base.EnableEvent (eventId);
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if (!(eventId is RichTextViewEvent))
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return;
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var tview = ViewObject as MacTextView;
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if (tview == null)
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return;
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tview.EnableEvent ((RichTextViewEvent)eventId);
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}
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public override void DisableEvent (object eventId)
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{
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base.DisableEvent (eventId);
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if (!(eventId is RichTextViewEvent))
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return;
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var tview = ViewObject as MacTextView;
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if (tview == null)
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return;
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tview.DisableEvent ((RichTextViewEvent)eventId);
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}
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}
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class MacTextView : NSTextView, IViewObject
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{
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IRichTextViewEventSink eventSink;
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ApplicationContext context;
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public NSView View {
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get { return this; }
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}
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public ViewBackend Backend { get; set; }
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public MacTextView (IntPtr p) : base (p)
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{
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CommonInit ();
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}
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public MacTextView (IRichTextViewEventSink eventSink, ApplicationContext context)
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{
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CommonInit ();
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this.eventSink = eventSink;
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this.context = context;
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EnableEvent (RichTextViewEvent.NavigateToUrl);
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}
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public void EnableEvent (RichTextViewEvent ev)
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{
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if (ev != RichTextViewEvent.NavigateToUrl)
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return;
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LinkClicked = TextLinkClicked;
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}
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public void DisableEvent (RichTextViewEvent ev)
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{
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if (ev != RichTextViewEvent.NavigateToUrl)
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return;
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LinkClicked = null;
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}
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bool TextLinkClicked (NSTextView textView, NSObject link, uint charIndex)
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{
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if (eventSink == null || context == null)
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return false;
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string linkUrl;
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if (link is NSString)
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linkUrl = (link as NSString);
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else if (link is NSUrl)
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linkUrl = (link as NSUrl).AbsoluteString;
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else
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linkUrl = null;
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Uri url = null;
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if (String.IsNullOrWhiteSpace (linkUrl) || !Uri.TryCreate (linkUrl, UriKind.RelativeOrAbsolute, out url))
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url = null;
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context.InvokeUserCode (delegate {
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eventSink.OnNavigateToUrl (url);
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});
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return true;
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}
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void CommonInit ()
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{
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Editable = false;
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}
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}
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class MacRichTextBuffer : IRichTextBuffer
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{
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const int FontSize = 16;
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const string FontFamily = "sans-serif";
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const int HeaderIncrement = 8;
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static readonly string[] lineSplitChars = new string[] { Environment.NewLine };
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static readonly IntPtr selInitWithHTMLDocumentAttributes_Handle = Selector.GetHandle ("initWithHTML:documentAttributes:");
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StringBuilder text;
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XmlWriter xmlWriter;
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Stack <int> paragraphIndent;
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public MacRichTextBuffer ()
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{
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text = new StringBuilder ();
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xmlWriter = XmlWriter.Create (text, new XmlWriterSettings {
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OmitXmlDeclaration = true,
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Encoding = Encoding.UTF8,
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Indent = true,
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IndentChars = "\t"
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});
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xmlWriter.WriteStartElement ("html");
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xmlWriter.WriteAttributeString ("style", String.Format ("font-family: {0}; font-size: {1}", FontFamily, FontSize));
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}
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public NSAttributedString ToAttributedString ()
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{
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xmlWriter.WriteEndElement ();
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xmlWriter.Flush ();
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if (text == null || text.Length == 0)
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return new NSAttributedString (String.Empty);
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NSDictionary docAttributes;
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try {
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return CreateStringFromHTML (text.ToString (), out docAttributes);
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} finally {
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text = null;
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xmlWriter.Dispose ();
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xmlWriter = null;
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docAttributes = null;
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}
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}
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NSAttributedString CreateStringFromHTML (string html, out NSDictionary docAttributes)
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{
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var data = NSData.FromString (html);
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IntPtr docAttributesPtr = Marshal.AllocHGlobal (4);
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Marshal.WriteInt32 (docAttributesPtr, 0);
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var attrString = new NSAttributedString ();
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attrString.Handle = Messaging.IntPtr_objc_msgSend_IntPtr_IntPtr (attrString.Handle, selInitWithHTMLDocumentAttributes_Handle, data.Handle, docAttributesPtr);
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IntPtr docAttributesValue = Marshal.ReadIntPtr (docAttributesPtr);
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docAttributes = docAttributesValue != IntPtr.Zero ? Runtime.GetNSObject (docAttributesValue) as NSDictionary : null;
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Marshal.FreeHGlobal (docAttributesPtr);
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return attrString;
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}
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public void EmitText (string text, RichTextInlineStyle style)
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{
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if (String.IsNullOrEmpty (text))
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return;
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bool haveStyle = true;
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switch (style) {
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case RichTextInlineStyle.Bold:
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xmlWriter.WriteStartElement ("strong");
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break;
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case RichTextInlineStyle.Italic:
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xmlWriter.WriteStartElement ("em");
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break;
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case RichTextInlineStyle.Monospace:
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xmlWriter.WriteStartElement ("tt");
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break;
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default:
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haveStyle = false;
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break;
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}
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bool first = true;
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foreach (string line in text.Split (lineSplitChars, StringSplitOptions.None)) {
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if (!first) {
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xmlWriter.WriteStartElement ("br");
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xmlWriter.WriteEndElement ();
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} else
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first = false;
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xmlWriter.WriteString (line);
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}
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if (haveStyle)
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xmlWriter.WriteEndElement ();
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}
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public void EmitStartHeader (int level)
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{
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if (level < 1)
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level = 1;
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if (level > 6)
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level = 6;
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xmlWriter.WriteStartElement ("h" + level);
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}
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public void EmitEndHeader ()
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{
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xmlWriter.WriteEndElement ();
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}
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public void EmitStartParagraph (int indentLevel)
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{
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if (paragraphIndent == null)
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paragraphIndent = new Stack<int> ();
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paragraphIndent.Push (indentLevel);
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// FIXME: perhaps use CSS indent?
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for (int i = 0; i < indentLevel; i++)
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xmlWriter.WriteStartElement ("blockindent");
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xmlWriter.WriteStartElement ("p");
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}
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public void EmitEndParagraph ()
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{
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xmlWriter.WriteEndElement (); // </p>
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int indentLevel;
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if (paragraphIndent != null && paragraphIndent.Count > 0)
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indentLevel = paragraphIndent.Pop ();
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else
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indentLevel = 0;
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for (int i = 0; i < indentLevel; i++)
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xmlWriter.WriteEndElement (); // </blockindent>
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}
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public void EmitOpenList ()
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{
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xmlWriter.WriteStartElement ("ul");
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}
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public void EmitOpenBullet ()
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{
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xmlWriter.WriteStartElement ("li");
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}
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public void EmitCloseBullet ()
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{
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xmlWriter.WriteEndElement ();
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}
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public void EmitCloseList ()
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{
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xmlWriter.WriteEndElement ();
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}
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public void EmitStartLink (string href, string title)
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{
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xmlWriter.WriteStartElement ("a");
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xmlWriter.WriteAttributeString ("href", href);
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// FIXME: it appears NSTextView ignores 'title' when it's told to display
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// link tooltips - it will use the URL instead. See if there's a way to make
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// it show the actual title
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xmlWriter.WriteAttributeString ("title", title);
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}
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public void EmitEndLink ()
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{
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xmlWriter.WriteEndElement ();
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}
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public void EmitCodeBlock (string code)
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{
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xmlWriter.WriteStartElement ("pre");
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xmlWriter.WriteString (code);
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xmlWriter.WriteEndElement ();
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}
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public void EmitHorizontalRuler ()
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{
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xmlWriter.WriteStartElement ("hr");
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xmlWriter.WriteEndElement ();
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}
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}
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}
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