Some navigation, but not working:(

2016-03-13 08:35:29 +08:00
parent 6ce714be1e
commit 751530b42d
5 changed files with 356 additions and 138 deletions
@@ -0,0 +1,162 @@
+(function(){
+	var ns = __namespace( "Components.Vim" );
+
+	/** @type {Dandelion} */
+	var Dand                                    = __import( "Dandelion" );
+	/** @type {Dandelion.IDOMElement} */
+	var IDOMElement                             = __import( "Dandelion.IDOMElement" );
+	/** @type {Dandelion.IDOMObject} */
+	var IDOMObject                              = __import( "Dandelion.IDOMObject" );
+	/** @type {System.Cycle} */
+	var Cycle                                   = __import( "System.Cycle" );
+	/** @type {System.Debug} */
+	var debug                                   = __import( "System.Debug" );
+
+	var GetLine = function( buffs, l )
+	{
+		/** @type {Components.Vim.LineBuffer} */
+		var LineHead = buffs[0];
+		l ++;
+
+		for( var i = 0, line = LineHead;
+			line && i < l; i ++ )
+		{
+			LineHead = line;
+			while( line )
+			{
+				line = line.next;
+				if( line.br ) break;
+			}
+		}
+
+		return LineHead;
+	};
+
+	var LineOffset = function( buffs, l )
+	{
+		/** @type {Components.Vim.LineBuffer} */
+		var offset = 0;
+
+		for( var i = 0, line = buffs[0];
+			line && i < l; i ++ )
+		{
+			while( line )
+			{
+				if( line.br )
+				{
+					offset += line.prev.toString().length + 1;
+
+					// Empty line has a special space
+					if( line.content == "" ) offset ++;
+
+					line = line.next;
+					break;
+				}
+				else
+				{
+					if( offset == 0 ) offset -= 1;
+
+					if( line.next && !line.next.br )
+						offset += line.cols + 1;
+				}
+
+				line = line.next;
+			}
+		}
+
+		debug.Info( offset );
+
+		return offset;
+	};
+
+	var Cursor = function( buffs )
+	{
+		this.buffers = buffs;
+		this.cols = buffs[0].cols;
+
+		// The preferred X position
+		this.pX = 0;
+
+		// The displaying X position
+		this.X = 0;
+
+		// The current line resided
+		this.Y = 0;
+
+		// The resulting position
+		this.P = 0;
+	};
+
+	// Can only be 1, -1
+	// 0 will be treated as undefined
+	Cursor.prototype.moveX = function( d )
+	{
+		var x = this.pX;
+
+		var updatePx = Boolean( d );
+		if( updatePx ) x = this.X + d;
+
+		if( !d ) d = 1;
+
+		var buffs = this.buffers;
+
+		/** @type {Components.Vim.LineBuffer} */
+		var line = GetLine( buffs, this.Y );
+		var content = line.visualLines.join( "\n" );
+
+		var c = content[ x ];
+
+		if( c == undefined )
+		{
+			x = d > 0 ? content.length - 1 : 0;
+		}
+		else if( c == "\n" )
+		{
+			x += d;
+		}
+
+		this.X = x;
+
+		if( updatePx )
+		{
+			this.pX = x;
+			this.updatePosition();
+		}
+	};
+
+	Cursor.prototype.lineStart = function()
+	{
+		this.pX = 0;
+		this.moveX();
+		this.updatePosition();
+	};
+
+	Cursor.prototype.lineEnd = function()
+	{
+		/** @type {Components.Vim.LineBuffer} */
+		this.moveX( Number.MAX_VALUE );
+	};
+
+	Cursor.prototype.updatePosition = function()
+	{
+		this.P = this.X + LineOffset( this.buffers, this.Y );
+	};
+
+	Cursor.prototype.moveY = function( d )
+	{
+		this.Y += d;
+		this.moveX();
+		this.updatePosition();
+	};
+
+	__readOnly( Cursor.prototype, "position", function()
+	{
+		return {
+			start: this.P
+			, end: this.P + 1
+		};
+	} );
+
+
+	ns[ NS_EXPORT ]( EX_CLASS, "Cursor", Cursor );
+})();