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add support for drag selection

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This commit is contained in:
Fabian Jakobs 2010-04-07 10:08:44 +02:00
commit f1d25fb7b2
3 changed files with 103 additions and 44 deletions
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111
Editor.js
View file

@ -174,14 +174,14 @@ function KeyBinding(element, host)
}
return stopEvent(e);
case keys.DELETE:
host.clearSelection();
case keys.DELETE:
host.removeRight();
host.clearSelection();
return stopEvent(e);
case keys.BACKSPACE:
host.clearSelection();
case keys.BACKSPACE:
host.removeLeft();
host.clearSelection();
return stopEvent(e);
case keys.TAB:
@ -196,7 +196,7 @@ function Editor(doc, renderer)
var container = renderer.getContainerElement();
this.renderer = renderer;
var textInput = new TextInput(container, this);
this.textInput = new TextInput(container, this);
new KeyBinding(container, this);
addListener(container, "mousedown", bind(this.onMouseDown, this));
@ -247,14 +247,41 @@ Editor.prototype =
{
this.textInput.focus();
var pos = this.renderer.screenToTextCoordinates(pageX, pageY);
var pos = this.renderer.screenToTextCoordinates(e.pageX, e.pageY);
this.moveTo(pos.row, pos.column);
this.setSelectionAnchor(pos.row, pos.column);
this.renderer.scrollCursorIntoView();
var _self = this;
var mousePageX, mousePageY;
var onMouseSelection = function(e) {
mousePageX = e.pageX;
mousePageY = e.pageY;
};
var onMouseSelectionEnd = function() {
clearInterval(timerId);
};
var onSelectionInterval = function()
{
if (mousePageX === undefined || mousePageY === undefined) return;
selectionLead = _self.renderer.screenToTextCoordinates(mousePageX, mousePageY);
_self._moveSelection(function() {
_self.moveTo(selectionLead.row, selectionLead.column);
});
_self.renderer.scrollCursorIntoView();
};
capture(this.container, onMouseSelection, onMouseSelectionEnd);
var timerId = setInterval(onSelectionInterval, 100);
return preventDefault(e);
},
onMouseWheel : function(e)
{
var delta = e.wheelDeltaY;
@ -282,24 +309,35 @@ Editor.prototype =
},
onTextInput: function(text)
{
this.cursor = this.doc.insert(this.cursor, text);
this.clearSelection();
{
if (this.hasSelection())
{
this.cursor = this.doc.remove(this.getSelectionRange());
this.clearSelection();
}
this.cursor = this.doc.insert(this.cursor, text);
this.draw();
this.renderer.scrollCursorIntoView();
},
removeRight : function()
{
var rangeEnd = {
row: this.cursor.row,
column: this.cursor.column + 1
{
if (this.hasSelection())
{
this.cursor = this.doc.remove(this.getSelectionRange());
}
if (rangeEnd.column > this.doc.getLine(this.cursor.row).length) {
rangeEnd.row += 1;
rangeEnd.column = 0;
else
{
var rangeEnd = {
row: this.cursor.row,
column: this.cursor.column + 1
}
if (rangeEnd.column > this.doc.getLine(this.cursor.row).length) {
rangeEnd.row += 1;
rangeEnd.column = 0;
}
this.doc.remove({start: this.cursor, end: renageEnd});
}
this.doc.remove({start: this.cursor, end: renageEnd});
this.draw();
this.renderer.scrollCursorIntoView();
@ -307,20 +345,27 @@ Editor.prototype =
removeLeft : function()
{
if (this.cursor.row == 0 && this.cursor.column == 0) {
return;
}
var rangeStart = {
row: this.cursor.row,
column: this.cursor.column + -1
}
if (rangeStart.column < 0)
if (this.hasSelection())
{
rangeStart.row -= 1;
rangeStart.column = this.doc.getLine(this.cursor.row-1).length;
this.cursor = this.doc.remove(this.getSelectionRange());
}
else
{
if (this.cursor.row == 0 && this.cursor.column == 0) {
return;
}
var rangeStart = {
row: this.cursor.row,
column: this.cursor.column + -1
}
if (rangeStart.column < 0)
{
rangeStart.row -= 1;
rangeStart.column = this.doc.getLine(this.cursor.row-1).length;
}
this.cursor = this.doc.remove({start: rangeStart, end: this.cursor});
}
this.cursor = this.doc.remove({start: rangeStart, end: this.cursor});
this.draw();
this.renderer.scrollCursorIntoView();
@ -393,8 +438,8 @@ Editor.prototype =
setSelectionAnchor : function(row, column)
{
this.selectionAnchor = {
row: row,
column: column
row: Math.min(this.doc.getLength()-1, Math.max(0, row)),
column: Math.min(this.doc.getLine(this.cursor.row).length, Math.max(0, column))
};
this.selectionLead = null;

13
VirtualRenderer.js
View file

@ -313,17 +313,8 @@ VirtualRenderer.prototype.screenToTextCoordinates = function(pageX, pageY)
{
var canvasPos = this.container.getBoundingClientRect();
if (pageX < canvasPos.left || pageX > canvasPos.right) {
col = null;
} else {
var col = Math.floor((pageX + this.container.scrollLeft - canvasPos.left) / this.characterWidth);
}
if (pageY < canvasPos.top || pageY > canvasPos.bottom) {
row = null;
} else {
var row = Math.floor((pageY + this.scrollTop - canvasPos.top) / this.lineHeight);
}
var col = Math.floor((pageX + this.container.scrollLeft - canvasPos.left) / this.characterWidth);
var row = Math.floor((pageY + this.scrollTop - canvasPos.top) / this.lineHeight);
return {
row: row,

23
lib.js
View file

@ -78,4 +78,27 @@ bind = function(fcn, context) {
return function() {
return fcn.apply(context, arguments);
}
}
capture = function(el, eventHandler, releaseCaptureHandler)
{
function onMouseMove(e)
{
eventHandler(e);
e.stopPropagation();
}
function onMouseUp(e)
{
eventHandler && eventHandler(e);
releaseCaptureHandler && releaseCaptureHandler();
document.removeEventListener("mousemove", onMouseMove, true);
document.removeEventListener("mouseup", onMouseUp, true);
e.stopPropagation();
}
document.addEventListener("mousemove", onMouseMove, true);
document.addEventListener("mouseup", onMouseUp, true);
}