big-moving.ru/api/soft/ajaxorg/lib/ace/ext/rtl.js

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2022-06-24 15:29:23 +05:00
define(function(require, exports, module) {
"use strict";
/** simple statusbar **/
var dom = require("ace/lib/dom");
var lang = require("ace/lib/lang");
var commands = [{
name: "leftToRight",
bindKey: { win: "Ctrl-Alt-Shift-L", mac: "Command-Alt-Shift-L" },
exec: function(editor) {
editor.session.$bidiHandler.setRtlDirection(editor, false);
},
readOnly: true
}, {
name: "rightToLeft",
bindKey: { win: "Ctrl-Alt-Shift-R", mac: "Command-Alt-Shift-R" },
exec: function(editor) {
editor.session.$bidiHandler.setRtlDirection(editor, true);
},
readOnly: true
}];
var Editor = require("../editor").Editor;
require("../config").defineOptions(Editor.prototype, "editor", {
rtlText: {
set: function(val) {
if (val) {
this.on("change", onChange);
this.on("changeSelection", onChangeSelection);
this.renderer.on("afterRender", updateLineDirection);
this.commands.on("exec", onCommandEmitted);
this.commands.addCommands(commands);
} else {
this.off("change", onChange);
this.off("changeSelection", onChangeSelection);
this.renderer.off("afterRender", updateLineDirection);
this.commands.off("exec", onCommandEmitted);
this.commands.removeCommands(commands);
clearTextLayer(this.renderer);
}
this.renderer.updateFull();
}
},
rtl: {
set: function(val) {
this.session.$bidiHandler.$isRtl = val;
if (val) {
this.setOption("rtlText", false);
this.renderer.on("afterRender", updateLineDirection);
this.session.$bidiHandler.seenBidi = true;
} else {
this.renderer.off("afterRender", updateLineDirection);
clearTextLayer(this.renderer);
}
this.renderer.updateFull();
}
}
});
/**
* Whenever the selection is changed, prevent cursor (lead) to be positioned at
* position 0 of right-to-left line in order to maintain the RLE marker at this position.
* When cursor reaches position 0, either advance it to position 1 of current line (default)
* or to last position of previous line (if it comes from position 1 as the result of commands
* mentioned in 'onCommandEmitted' event handler).
* This serves few purposes:
* - ensures cursor visual movement as if RLE mark doesn't exist.
* - prevents character insertion before RLE mark.
* - prevents RLE mark removal when 'delete' is pressed when cursot stays at position 0.
* - ensures RLE mark removal on line merge, when 'delete' is pressed and cursor stays
* at last position of previous line and when 'backspace' is pressed and cursor stays at
* first position of current line. This is achived by hacking range boundaries on 'remove' operation.
**/
function onChangeSelection(e, editor) {
var lead = editor.getSelection().lead;
if (editor.session.$bidiHandler.isRtlLine(lead.row)) {
if (lead.column === 0) {
if (editor.session.$bidiHandler.isMoveLeftOperation && lead.row > 0) {
editor.getSelection().moveCursorTo(lead.row - 1, editor.session.getLine(lead.row - 1).length);
} else {
if (editor.getSelection().isEmpty())
lead.column += 1;
else
lead.setPosition(lead.row, lead.column + 1);
}
}
}
}
function onCommandEmitted(commadEvent) {
commadEvent.editor.session.$bidiHandler.isMoveLeftOperation = /gotoleft|selectleft|backspace|removewordleft/.test(commadEvent.command.name);
}
/**
* Whenever the document is changed make sure that line break operatin
* on right-to-left line (like pressing Enter or pasting multi-line text)
* produces new right-to-left lines
**/
function onChange(delta, editor) {
var session = editor.session;
session.$bidiHandler.currentRow = null;
if (session.$bidiHandler.isRtlLine(delta.start.row) && delta.action === 'insert' && delta.lines.length > 1) {
for (var row = delta.start.row; row < delta.end.row; row++) {
if (session.getLine(row + 1).charAt(0) !== session.$bidiHandler.RLE)
session.doc.$lines[row + 1] = session.$bidiHandler.RLE + session.getLine(row + 1);
}
}
}
function updateLineDirection(e, renderer) {
var session = renderer.session;
var $bidiHandler = session.$bidiHandler;
var cells = renderer.$textLayer.$lines.cells;
var width = renderer.layerConfig.width - renderer.layerConfig.padding + "px";
cells.forEach(function(cell) {
var style = cell.element.style;
if ($bidiHandler && $bidiHandler.isRtlLine(cell.row)) {
style.direction = "rtl";
style.textAlign = "right";
style.width = width;
} else {
style.direction = "";
style.textAlign = "";
style.width = "";
}
});
}
function clearTextLayer(renderer) {
var lines = renderer.$textLayer.$lines;
lines.cells.forEach(clear);
lines.cellCache.forEach(clear);
function clear(cell) {
var style = cell.element.style;
style.direction = style.textAlign = style.width = "";
}
}
});