dreemgl/system/textbox/cursorset.js

DreemGL is an open-source multi-screen prototyping framework for mediated environments, with a visual editor and shader styling for webGL and DALi runtimes written in JavaScript. As a toolkit for gpu-accelerated multiscreen development, DreemGL includes

/* DreemGL is a collaboration between Teeming Society & Samsung Electronics, sponsored by Samsung and others.
   Copyright 2015-2016 Teeming Society. Licensed under the Apache License, Version 2.0 (the "License"); You may not use this file except in compliance with the License.
   You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing,
   software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and limitations under the License.*/

define.class(function(require){
	var Cursor = require('./singlecursor')

	// forward the cursor api
	function makeForward(key, fn){
		this[key] = function(){
			this.delta = 0
			for(var i = 0; i < this.list.length; i++){
				var cursor = this.list[i]
				cursor[key].apply(cursor, arguments)
			}
			this.update()
		}
	}

	for(var key in Cursor.prototype) if(typeof Cursor.prototype[key] == 'function'){
		makeForward.call(this, key, Cursor.prototype[key])
	}

	this.atConstructor = function(editor){
		this.editor = editor
		this.list = [this.newCursor()]
		this.fusing = true
	}

	this.serializeSelection = function(){
		var str = ''
		for(var i = 0; i < this.list.length; i++){
			var cursor = this.list[i]
			str += this.editor.textbuf.serializeText(cursor.lo, cursor.hi)
		}
		return str
	}

	this.newCursor = function(){
		return new Cursor(this)
	}

	this.toArray = function(inp){
		var out = []
		for(var i = 0; i < this.list.length; i++){
			var cursor = this.list[i]
			out.push(cursor.start, cursor.end)
		}
		return out
	}

	this.fromArray = function(inp){
		this.list = []
		for(var i = 0; i < inp.length; i += 2){
			var cur = this.newCursor()
			this.list.push(cur)
			cur.start = inp[i]
			cur.end = inp[i+1]
		}
		this.update()
	}

	this.fuse = function(){

		this.list.sort(function(a,b){ return (a.start<a.end?a.start:a.end) < (b.start<b.end?b.start:b.end)? -1: 1})
		// lets do single pass
		for(var i = 0; i < this.list.length - 1;){
			var cur = this.list[i]
			var nxt = this.list[i + 1]
			// lets figure out the different overlap cases
			if(cur.hi >= nxt.lo){
				if(cur.hi <= nxt.hi){ // we fuse it [cur<]nxt>
					if(nxt.end < nxt.start){
						cur.end = cur.lo
						cur.start = nxt.hi
					}
					else{
						cur.start = cur.lo
						cur.end = nxt.hi
					}
				}
				// remove the nxt
				this.list.splice(i+1, 1)
			}
			else i++
		}
		// lets communicate the position of our first cursor

	}
	/*
	this.markDelta = function(){
		for(var i = 0; i < this.list.length; i++){
			var cursor = this.list[i]
			cursor.mark_start = this.editor.textbuf.charCodeAt(cursor.start - 1)
			cursor.mark_end = this.editor.textbuf.charCodeAt(cursor.end - 1)
		}
	}

	this.markSeek = function(pos, delta, mark){
		pos += delta
		var count = this.editor.textbuf.char_count
		if(pos < 0) pos = 0
		if(pos >= count) pos = count - 1
		// ignore markers that are volatile
		if(mark != 32 && mark != 9 && mark != 10 && mark != 59){
			pos++
			var start = pos
			var max = abs(delta)
			while(pos > 0 && this.editor.textbuf.charCodeAt(pos - 1) != mark){
				if(start - pos > max)break
				pos--
			}
		}
		return pos
	}

	this.moveDelta = function(beyond, delta){
		for(var i = 0; i < this.list.length; i++){
			var cursor = this.list[i]

			if(cursor.start>=beyond)
				cursor.start = this.markSeek(cursor.start, delta, cursor.mark_start)
			if(cursor.end>=beyond){
				cursor.end = this.markSeek(cursor.end, delta, cursor.mark_end)
			//	cursor.max = text_layer.cursorRect(cursor.end).x
			}
		}
		this.update()
	}
	*/
	this.update = function(){
		if(this.editor.cursorsChanged) this.editor.cursorsChanged()
	}

	this.rectSelect = function(x1, y1, x2, y2, clone){
		if(y2 < y1){
			var t = y1
			y1 = y2
			y2 = t
		}
		var new_list = Array.prototype.slice.apply(clone)
		var height = this.editor.textbuf.line_height
		var y = y1
		while(1){
			var cur = this.newCursor()
			new_list.push(cur)
			cur.start = this.editor.textbuf.offsetFromPos(x1,y)
			cur.end = this.editor.textbuf.offsetFromPos(x2,y)
			//console.log(cur.end, x2)
			if(y >= y2) break
			y += height
			if(y > y2) y = y2
		}
		list = new_list
		this.update()
	}

	this.addCursor = function(){
		var cursor = this.newCursor(this)
		cursor.start = cursor.end = 0//this.list.length
		this.list.push(cursor)
		return cursor
	}
})