botanjs/src/Components/Vim/Actions/VISUAL.js
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(function(){
var ns = __namespace( "Components.Vim.Actions" );
/** @type {System.Debug} */
var debug = __import( "System.Debug" );
var Mesg = __import( "Components.Vim.Message" );
/** @type {Components.Vim.IAction} */
var YANK = ns[ NS_INVOKE ]( "YANK" );
/** @type {Components.Vim.IAction} */
var DELETE = ns[ NS_INVOKE ]( "DELETE" );
/** @type {Components.Vim.IAction} */
var SHIFT_LINES = ns[ NS_INVOKE ]( "SHIFT_LINES" );
/** @type {Components.Vim.IAction} */
var PUT = ns[ NS_INVOKE ]( "PUT" );
var MODE_NULL = -1;
var MODE_VISUAL = 0;
var MODE_LINE = 1;
// The offset of given line relative to content
var offsetY = function( cur, l )
{
if( l == 0 ) return 0;
var f = cur.feeder;
var j = 0;
var last = -1;
for( var i = f.content.indexOf( "\n" ); 0 <= i; i = f.content.indexOf( "\n", i + 1 ) )
{
last = i;
j ++;
if( l <= j ) break;
}
if( f.EOF ) i = last;
// "\n" compensation
var c = f.content[ i + 1 ];
if(!( c == undefined || c == "\n" ))
{
i ++;
}
return i;
};
var lineInfo = function( c )
{
return {
lineNum: c.getLine().lineNum
, aX: c.aX
};
};
/** marker @type {Components.Vim.State.Marks} */
var MarkSelected = function( marker, s, e )
{
marker.set( "<", s.lineNum, s.aX );
marker.set( ">", e.lineNum, e.aX );
};
/** @type {Components.Vim.IAction} */
var VISUAL = function( Cursor )
{
this.__reset( Cursor );
this.__msg = "";
Cursor.blink = false;
Cursor.pSpace = true;
};
VISUAL.prototype.__reset = function( Cursor )
{
/** @type {Components.Vim.Cursor} */
this.__cursor = Cursor;
var s = lineInfo( Cursor );
s.aPos = Cursor.aPos;
s.X = Cursor.X;
s.pStart = Cursor.PStart;
s.aStart = s.aPos - s.aX;
Cursor.suppressEvent();
Cursor.lineEnd( true );
s.aEnd = Cursor.aPos;
Cursor.moveTo( s.aPos );
Cursor.unsuppressEvent();
this.__startLine = s;
};
VISUAL.prototype.allowMovement = true;
VISUAL.prototype.dispose = function()
{
var c = this.__cursor;
c.blink = true;
c.pSpace = false;
c.updatePosition();
// This fix the highlighting position of missing phantomSpace
// for maximum filled line
if( c.feeder.wrap && 0 < c.X )
{
c.suppressEvent();
c.moveX( -1 );
c.moveX( 1 );
c.unsuppressEvent();
}
};
VISUAL.prototype.handler = function( e, done )
{
e.preventDefault();
if( e.ModKeys ) return;
var cur = this.__cursor;
var feeder = cur.feeder;
var Action = null;
var dispatchUpdate = false;
if( e.kMap( "y" ) )
{
Action = new YANK( cur );
}
else if( e.kMap( "d" ) )
{
Action = new DELETE( cur );
}
else if( e.kMap( "p" ) )
{
Action = new PUT( cur );
}
else if( e.kMap( "V" ) )
{
if( this.__mode == MODE_LINE ) return true;
else
{
dispatchUpdate = true;
this.__mode = MODE_LINE;
this.__msg = Mesg( "VISLINE" );
}
}
else if( e.kMap( "<" ) || e.kMap( ">" ) )
{
Action = new SHIFT_LINES( cur, e );
}
else if( e.kMap( "v" ) )
{
if( this.__mode == MODE_VISUAL ) return true;
else
{
dispatchUpdate = true;
this.__mode = MODE_VISUAL;
this.__msg = Mesg( "VISUAL" );
cur.updatePosition();
}
}
if( dispatchUpdate )
feeder.dispatcher.dispatchEvent( new BotanEvent( "VisualUpdate" ) );
if( this.__mode == MODE_NULL )
{
debug.Error( new Error( "Mode is undefined" ) );
return true;
}
var startLine = this.__startLine;
if( Action )
{
cur.suppressEvent();
var lineMode = this.__mode == MODE_LINE;
if( lineMode )
{
if( startLine.aPos < cur.aPos )
{
cur.lineEnd( true );
startLine.aPos = startLine.aStart;
}
else
{
cur.lineStart();
startLine.aPos = startLine.aEnd;
}
}
/**
* Content Modifier:
* This swaps the cursor direction from LTR to RTL
* i.e. treat all delete as "e<----s" flow to keep
* the cursor position as the top on UNDO / REDO
**/
var IsContMod = ~[ DELETE, PUT ].indexOf( Action.constructor );
if( IsContMod && startLine.aPos < cur.aPos )
{
var o = cur.aPos;
cur.moveTo( startLine.aPos, true );
startLine.aPos = o;
}
Action.handler( e, startLine.aPos, lineMode );
/**
* Cursor Modifier:
* Whether the cursor position is already handled
**/
var IsCurMod = ~[ DELETE, PUT, SHIFT_LINES ].indexOf( Action.constructor );
if( !IsCurMod )
{
cur.moveTo( startLine.aPos );
}
this.__msg = Action.getMessage();
Action.dispose();
cur.unsuppressEvent();
startLine.pStart = cur.PStart;
return true;
}
else
{
if( e.range )
{
cur.suppressEvent();
var r = e.range;
if( cur.aPos == startLine.aPos )
{
cur.moveTo( r.open, true, false, true );
this.__reset( cur );
startLine = this.__startLine;
}
cur.unsuppressEvent();
cur.moveTo( r.close, true, false, true );
}
var currAp = cur.aPos;
// Calculate the visible max min aPos of the current screen
var line = feeder.firstBuffer;
var firstLine = line.lineNum;
var minAp = offsetY( cur, firstLine );
var maxAp = offsetY( cur, firstLine + feeder.moreAt + 1 ) - 1;
debug.Info( "Min aPos: " + minAp, "Max aPos: " + maxAp );
var pStart = startLine.X;
var nstart = cur.PStart;
// highlight from the start
if( startLine.aPos < minAp )
{
pStart = 0;
if( this.__mode == MODE_LINE )
{
cur.suppressEvent();
cur.lineEnd( true );
nstart = cur.PStart;
cur.moveTo( currAp, true );
cur.unsuppressEvent();
}
}
// highlight from the end
else if( maxAp < startLine.aPos )
{
pStart = -2;
var i = 0;
do
{
if( line.placeholder ) break;
if( i <= feeder.moreAt )
{
pStart += line.toString().length + 1;
}
i ++;
}
while( line = line.next );
}
else
{
var l = startLine.lineNum;
if( this.__mode == MODE_LINE )
{
cur.suppressEvent();
pStart = 0;
if( currAp < startLine.aPos )
{
pStart = -1;
l ++;
cur.lineStart();
nstart = cur.PStart;
}
else if( startLine.aPos < currAp )
{
cur.lineEnd( true );
nstart = cur.PStart;
}
// aPos == currPos
else
{
cur.lineStart();
nstart = cur.PStart;
cur.lineEnd( true );
pStart = cur.PStart;
l = line.lineNum;
}
cur.moveTo( currAp, true );
cur.unsuppressEvent();
}
else if( this.__mode == MODE_VISUAL )
{
if( currAp == startLine.aPos ) return;
}
// Append the Y offset
var i = 0;
do
{
if( line.lineNum == l || line.placeholder ) break;
pStart += line.toString().length + 1;
}
while( line = line.next );
}
var prevPos = pStart;
var newPos = nstart;
var posDiff = newPos - prevPos;
var currAp = cur.aPos;
// Sets the visual position
// s-->e
if( 0 <= posDiff )
{
newPos = newPos + 1;
MarkSelected( e.target.marks, startLine, lineInfo( cur ) );
}
// e<--s
else if( posDiff < 0 )
{
prevPos += posDiff;
newPos = pStart + 1;
MarkSelected( e.target.marks, lineInfo( cur ), startLine );
}
cur.PStart = prevPos;
cur.PEnd = newPos;
}
};
VISUAL.prototype.getMessage = function()
{
return this.__msg;
};
ns[ NS_EXPORT ]( EX_CLASS, "VISUAL", VISUAL );
})();