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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
/**
* CodeMirror source editor utils
* @module utils/source-editor
*/
const CodeMirror = require("codemirror");
require("raw!chrome://devtools/content/shared/sourceeditor/codemirror/lib/codemirror.css");
require("codemirror/mode/javascript/javascript");
require("codemirror/mode/htmlmixed/htmlmixed");
require("codemirror/mode/coffeescript/coffeescript");
require("codemirror/mode/jsx/jsx");
require("codemirror/mode/elm/elm");
require("codemirror/mode/clojure/clojure");
require("codemirror/mode/haxe/haxe");
require("codemirror/addon/search/searchcursor");
require("codemirror/addon/fold/foldcode");
require("codemirror/addon/fold/brace-fold");
require("codemirror/addon/fold/indent-fold");
require("codemirror/addon/fold/foldgutter");
require("codemirror/addon/runmode/runmode");
require("codemirror/addon/selection/active-line");
require("codemirror/addon/edit/matchbrackets");
require("codemirror/addon/display/placeholder");
require("codemirror/mode/clike/clike");
require("codemirror/mode/rust/rust");
require("raw!chrome://devtools/content/debugger/src/utils/editor/source-editor.css");
// NOTE: we should eventually use debugger-html context type mode
// Maximum allowed margin (in number of lines) from top or bottom of the editor
// while shifting to a line which was initially out of view.
const MAX_VERTICAL_OFFSET = 3;
export default class SourceEditor {
opts;
editor;
constructor(opts) {
this.opts = opts;
}
appendToLocalElement(node) {
this.editor = CodeMirror(node, this.opts);
}
destroy() {
// Unlink the current document.
if (this.editor.doc) {
this.editor.doc.cm = null;
}
}
get codeMirror() {
return this.editor;
}
get CodeMirror() {
return CodeMirror;
}
setText(str) {
this.editor.setValue(str);
}
getText() {
return this.editor.getValue();
}
setMode(value) {
this.editor.setOption("mode", value);
}
/**
* Replaces the current document with a new source document
* @memberof utils/source-editor
*/
replaceDocument(doc) {
this.editor.swapDoc(doc);
}
/**
* Creates a CodeMirror Document
* @returns CodeMirror.Doc
* @memberof utils/source-editor
*/
createDocument() {
return new CodeMirror.Doc("");
}
/**
* Aligns the provided line to either "top", "center" or "bottom" of the
* editor view with a maximum margin of MAX_VERTICAL_OFFSET lines from top or
* bottom.
* @memberof utils/source-editor
*/
alignLine(line, align = "top") {
const cm = this.editor;
const editorClientRect = cm.getWrapperElement().getBoundingClientRect();
const from = cm.lineAtHeight(editorClientRect.top, "page");
const to = cm.lineAtHeight(
editorClientRect.height + editorClientRect.top,
"page"
);
const linesVisible = to - from;
const halfVisible = Math.round(linesVisible / 2);
// If the target line is in view, skip the vertical alignment part.
if (line <= to && line >= from) {
return;
}
// Setting the offset so that the line always falls in the upper half
// of visible lines (lower half for bottom aligned).
// MAX_VERTICAL_OFFSET is the maximum allowed value.
const offset = Math.min(halfVisible, MAX_VERTICAL_OFFSET);
let topLine =
{
center: Math.max(line - halfVisible, 0),
bottom: Math.max(line - linesVisible + offset, 0),
top: Math.max(line - offset, 0),
}[align || "top"] || offset;
// Bringing down the topLine to total lines in the editor if exceeding.
topLine = Math.min(topLine, cm.lineCount());
this.setFirstVisibleLine(topLine);
}
/**
* Scrolls the view such that the given line number is the first visible line.
* @memberof utils/source-editor
*/
setFirstVisibleLine(line) {
const { top } = this.editor.charCoords({ line, ch: 0 }, "local");
this.editor.scrollTo(0, top);
}
}
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