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PNG: refactor explorer to avoid a class (no user impact)

This commit is contained in:
Evan Hahn 2023-08-02 13:52:02 -05:00
parent 6e047609ce
commit 4ea0edcbae
1 changed files with 56 additions and 66 deletions
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44
public/png/explorer.js
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@ -1,6 +1,6 @@
// @ts-check // @ts-check
import crel from "../common/crel.js"; import crel, { fragment } from "../common/crel.js";
import formatBytes from "../common/formatBytes.js"; import formatBytes from "../common/formatBytes.js";
/** @typedef {import("./nodePath.js").NodePath} NodePath */ /** @typedef {import("./nodePath.js").NodePath} NodePath */
/** @typedef {import("../../types/png.d.ts").PngNode} PngNode */ /** @typedef {import("../../types/png.d.ts").PngNode} PngNode */
@ -11,21 +11,27 @@ import formatBytes from "../common/formatBytes.js";
* @returns {NodeUi} * @returns {NodeUi}
*/ */
class Explorer { /**
#bytesEl = crel("div", { class: "bytes" });
#treeEl = crel("div", { class: "tree" });
/**
* @param {PngNode} rootNode * @param {PngNode} rootNode
* @param {NodeUiFn} getNodeUi * @param {NodeUiFn} getNodeUi
* @returns {DocumentFragment}
*/ */
constructor(rootNode, getNodeUi) { export default (rootNode, getNodeUi) => {
/** const [bytesRootEl, treeRootEl] = traverse(rootNode, [], getNodeUi);
const outerBytesEl = crel("div", { class: "bytes" }, bytesRootEl);
const outerTreeEl = crel("div", { class: "tree" }, treeRootEl);
return fragment(outerBytesEl, outerTreeEl);
};
/**
* @param {PngNode} node * @param {PngNode} node
* @param {NodePath} path * @param {NodePath} path
* @param {NodeUiFn} getNodeUi
* @returns [HTMLElement, HTMLElement] Each node's bytes and tree elements. * @returns [HTMLElement, HTMLElement] Each node's bytes and tree elements.
*/ */
const traverse = (node, path) => { const traverse = (node, path, getNodeUi) => {
const nodeBytesEl = crel("span", { "data-path": path }); const nodeBytesEl = crel("span", { "data-path": path });
const isRoot = path.length === 0; const isRoot = path.length === 0;
@ -52,6 +58,7 @@ class Explorer {
const [childBytesEl, childTreeEl] = traverse( const [childBytesEl, childTreeEl] = traverse(
child, child,
path.concat(index), path.concat(index),
getNodeUi,
); );
if (index > 0) nodeBytesEl.append(" "); if (index > 0) nodeBytesEl.append(" ");
nodeBytesEl.append(childBytesEl); nodeBytesEl.append(childBytesEl);
@ -63,21 +70,4 @@ class Explorer {
} }
return [nodeBytesEl, nodeTreeEl]; return [nodeBytesEl, nodeTreeEl];
}; };
// TODO: better variable names
const [a, b] = traverse(rootNode, []);
this.#bytesEl.append(a);
this.#treeEl.append(b);
this.el = document.createDocumentFragment();
this.el.append(this.#bytesEl, this.#treeEl);
}
}
/**
* @param {PngNode} rootNode
* @param {NodeUiFn} getNodeUi
* @returns {DocumentFragment}
*/
export default (rootNode, getNodeUi) => new Explorer(rootNode, getNodeUi).el;