735 lines
19 KiB
TypeScript
735 lines
19 KiB
TypeScript
/* Copyright: Ankitects Pty Ltd and contributors
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* License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
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let currentField = null;
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let changeTimer = null;
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let currentNoteId = null;
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declare interface String {
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format(...args: string[]): string;
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}
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/* kept for compatibility with add-ons */
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String.prototype.format = function (...args: string[]): string {
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return this.replace(/\{\d+\}/g, (m: string): void => {
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const match = m.match(/\d+/);
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return match ? args[match[0]] : "";
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});
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};
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function setFGButton(col: string): void {
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$("#forecolor")[0].style.backgroundColor = col;
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}
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function saveNow(keepFocus: boolean): void {
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if (!currentField) {
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return;
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}
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clearChangeTimer();
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if (keepFocus) {
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saveField("key");
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} else {
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// triggers onBlur, which saves
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currentField.blur();
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}
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}
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function triggerKeyTimer(): void {
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clearChangeTimer();
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changeTimer = setTimeout(function () {
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updateButtonState();
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saveField("key");
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}, 600);
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}
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interface Selection {
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modify(s: string, t: string, u: string): void;
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}
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function onKey(evt: KeyboardEvent): void {
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// esc clears focus, allowing dialog to close
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if (evt.code === "Escape") {
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currentField.blur();
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return;
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}
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// prefer <br> instead of <div></div>
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if (evt.code === "Enter" && !inListItem()) {
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evt.preventDefault();
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document.execCommand("insertLineBreak");
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return;
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}
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// fix Ctrl+right/left handling in RTL fields
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if (currentField.dir === "rtl") {
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const selection = window.getSelection();
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let granularity = "character";
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let alter = "move";
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if (evt.ctrlKey) {
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granularity = "word";
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}
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if (evt.shiftKey) {
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alter = "extend";
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}
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if (evt.code === "ArrowRight") {
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selection.modify(alter, "right", granularity);
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evt.preventDefault();
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return;
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} else if (evt.code === "ArrowLeft") {
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selection.modify(alter, "left", granularity);
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evt.preventDefault();
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return;
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}
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}
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triggerKeyTimer();
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}
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function onKeyUp(evt: KeyboardEvent): void {
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// Avoid div element on remove
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if (evt.code === "Enter" || evt.code === "Backspace") {
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const anchor = window.getSelection().anchorNode;
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if (
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nodeIsElement(anchor) &&
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anchor.tagName === "DIV" &&
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!anchor.classList.contains("field") &&
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anchor.childElementCount === 1 &&
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anchor.children[0].tagName === "BR"
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) {
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anchor.replaceWith(anchor.children[0]);
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}
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}
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}
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function nodeIsElement(node: Node): node is Element {
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return node.nodeType === Node.ELEMENT_NODE;
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}
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const INLINE_TAGS = [
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"A",
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"ABBR",
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"ACRONYM",
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"AUDIO",
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"B",
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"BDI",
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"BDO",
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"BIG",
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"BR",
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"BUTTON",
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"CANVAS",
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"CITE",
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"CODE",
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"DATA",
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"DATALIST",
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"DEL",
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"DFN",
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"EM",
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"EMBED",
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"I",
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"IFRAME",
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"IMG",
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"INPUT",
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"INS",
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"KBD",
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"LABEL",
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"MAP",
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"MARK",
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"METER",
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"NOSCRIPT",
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"OBJECT",
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"OUTPUT",
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"PICTURE",
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"PROGRESS",
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"Q",
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"RUBY",
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"S",
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"SAMP",
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"SCRIPT",
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"SELECT",
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"SLOT",
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"SMALL",
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"SPAN",
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"STRONG",
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"SUB",
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"SUP",
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"SVG",
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"TEMPLATE",
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"TEXTAREA",
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"TIME",
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"U",
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"TT",
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"VAR",
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"VIDEO",
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"WBR",
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];
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function nodeIsInline(node: Node): boolean {
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return !nodeIsElement(node) || INLINE_TAGS.includes(node.tagName);
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}
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function inListItem(): boolean {
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const anchor = window.getSelection().anchorNode;
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let inList = false;
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let n = nodeIsElement(anchor) ? anchor : anchor.parentElement;
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while (n) {
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inList = inList || window.getComputedStyle(n).display == "list-item";
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n = n.parentElement;
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}
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return inList;
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}
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function insertNewline(): void {
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if (!inPreEnvironment()) {
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setFormat("insertText", "\n");
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return;
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}
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// in some cases inserting a newline will not show any changes,
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// as a trailing newline at the end of a block does not render
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// differently. so in such cases we note the height has not
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// changed and insert an extra newline.
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const r = window.getSelection().getRangeAt(0);
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if (!r.collapsed) {
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// delete any currently selected text first, making
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// sure the delete is undoable
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setFormat("delete");
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}
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const oldHeight = currentField.clientHeight;
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setFormat("inserthtml", "\n");
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if (currentField.clientHeight === oldHeight) {
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setFormat("inserthtml", "\n");
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}
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}
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// is the cursor in an environment that respects whitespace?
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function inPreEnvironment(): boolean {
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const anchor = window.getSelection().anchorNode;
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const n = nodeIsElement(anchor) ? anchor : anchor.parentElement;
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return window.getComputedStyle(n).whiteSpace.startsWith("pre");
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}
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function onInput(): void {
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// make sure IME changes get saved
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triggerKeyTimer();
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}
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function updateButtonState(): void {
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const buts = ["bold", "italic", "underline", "superscript", "subscript"];
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for (const name of buts) {
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const elem = document.querySelector(`#${name}`) as HTMLElement;
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elem.classList.toggle("highlighted", document.queryCommandState(name));
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}
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// fixme: forecolor
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// 'col': document.queryCommandValue("forecolor")
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}
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function toggleEditorButton(buttonid: string): void {
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const button = $(buttonid)[0];
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button.classList.toggle("highlighted");
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}
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function setFormat(cmd: string, arg?: any, nosave: boolean = false): void {
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document.execCommand(cmd, false, arg);
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if (!nosave) {
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saveField("key");
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updateButtonState();
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}
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}
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function clearChangeTimer(): void {
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if (changeTimer) {
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clearTimeout(changeTimer);
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changeTimer = null;
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}
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}
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function onFocus(evt: FocusEvent): void {
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const elem = evt.currentTarget as HTMLElement;
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if (currentField === elem) {
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// anki window refocused; current element unchanged
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return;
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}
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currentField = elem;
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pycmd(`focus:${currentFieldOrdinal()}`);
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enableButtons();
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// do this twice so that there's no flicker on newer versions
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caretToEnd();
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// scroll if bottom of element off the screen
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function pos(elem: HTMLElement): number {
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let cur = 0;
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do {
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cur += elem.offsetTop;
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elem = elem.offsetParent as HTMLElement;
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} while (elem);
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return cur;
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}
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const y = pos(elem);
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if (
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window.pageYOffset + window.innerHeight < y + elem.offsetHeight ||
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window.pageYOffset > y
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) {
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window.scroll(0, y + elem.offsetHeight - window.innerHeight);
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}
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}
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function focusField(n: number): void {
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if (n === null) {
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return;
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}
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$(`#f${n}`).focus();
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}
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function focusIfField(x: number, y: number): boolean {
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const elements = document.elementsFromPoint(x, y);
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for (let i = 0; i < elements.length; i++) {
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let elem = elements[i] as HTMLElement;
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if (elem.classList.contains("field")) {
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elem.focus();
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// the focus event may not fire if the window is not active, so make sure
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// the current field is set
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currentField = elem;
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return true;
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}
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}
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return false;
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}
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function onPaste(): void {
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pycmd("paste");
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window.event.preventDefault();
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}
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function caretToEnd(): void {
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const r = document.createRange();
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r.selectNodeContents(currentField);
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r.collapse(false);
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const s = document.getSelection();
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s.removeAllRanges();
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s.addRange(r);
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}
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function onBlur(): void {
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if (!currentField) {
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return;
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}
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if (document.activeElement === currentField) {
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// other widget or window focused; current field unchanged
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saveField("key");
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} else {
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saveField("blur");
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currentField = null;
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disableButtons();
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}
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}
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function fieldContainsInlineContent(field: Element): boolean {
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if (field.childNodes.length === 0) {
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// for now, for all practical purposes, empty fields are in block mode
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return false;
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}
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for (const child of field.children) {
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if (!nodeIsInline(child)) {
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return false;
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}
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}
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return true;
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}
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function saveField(type: "blur" | "key"): void {
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clearChangeTimer();
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if (!currentField) {
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// no field has been focused yet
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return;
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}
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const fieldText =
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fieldContainsInlineContent(currentField) &&
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currentField.innerHTML.endsWith("<br>")
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? // trim trailing <br>
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currentField.innerHTML.slice(0, -4)
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: currentField.innerHTML;
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pycmd(`${type}:${currentFieldOrdinal()}:${currentNoteId}:${fieldText}`);
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}
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function currentFieldOrdinal(): string {
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return currentField.id.substring(1);
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}
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function wrappedExceptForWhitespace(text: string, front: string, back: string): string {
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const match = text.match(/^(\s*)([^]*?)(\s*)$/);
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return match[1] + front + match[2] + back + match[3];
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}
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function preventButtonFocus(): void {
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for (const element of document.querySelectorAll("button.linkb")) {
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element.addEventListener("mousedown", (evt: Event) => {
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evt.preventDefault();
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});
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}
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}
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function disableButtons(): void {
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$("button.linkb:not(.perm)").prop("disabled", true);
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}
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function enableButtons(): void {
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$("button.linkb").prop("disabled", false);
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}
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// disable the buttons if a field is not currently focused
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function maybeDisableButtons(): void {
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if (!document.activeElement || document.activeElement.className !== "field") {
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disableButtons();
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} else {
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enableButtons();
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}
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}
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function wrap(front: string, back: string): void {
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wrapInternal(front, back, false);
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}
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/* currently unused */
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function wrapIntoText(front: string, back: string): void {
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wrapInternal(front, back, true);
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}
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function wrapInternal(front: string, back: string, plainText: boolean): void {
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const s = window.getSelection();
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let r = s.getRangeAt(0);
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const content = r.cloneContents();
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const span = document.createElement("span");
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span.appendChild(content);
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if (plainText) {
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const new_ = wrappedExceptForWhitespace(span.innerText, front, back);
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setFormat("inserttext", new_);
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} else {
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const new_ = wrappedExceptForWhitespace(span.innerHTML, front, back);
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setFormat("inserthtml", new_);
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}
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if (!span.innerHTML) {
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// run with an empty selection; move cursor back past postfix
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r = s.getRangeAt(0);
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r.setStart(r.startContainer, r.startOffset - back.length);
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r.collapse(true);
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s.removeAllRanges();
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s.addRange(r);
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}
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}
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function onCutOrCopy(): boolean {
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pycmd("cutOrCopy");
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return true;
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}
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class EditingArea extends HTMLElement {
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connectedCallback() {
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this.setAttribute("contenteditable", "true");
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}
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}
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customElements.define("editing-area", EditingArea);
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class EditorField extends HTMLElement {
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labelContainer: HTMLDivElement
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label: HTMLSpanElement
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editingContainer: HTMLDivElement
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editingArea: EditingArea
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editingShadow: ShadowRoot
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connectedCallback() {
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this.labelContainer = this.appendChild(document.createElement("div"));
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this.labelContainer.className = "fname";
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this.label = this.labelContainer.appendChild(document.createElement("span"));
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this.label.className = "fieldname";
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this.editingContainer = this.appendChild(document.createElement("div"));
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this.editingContainer.className = "field";
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this.editingContainer.addEventListener("keydown", onKey);
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this.editingContainer.addEventListener("keyup", onKeyUp);
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this.editingContainer.addEventListener("input", onInput);
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this.editingContainer.addEventListener("focus", onFocus);
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this.editingContainer.addEventListener("blur", onBlur);
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this.editingContainer.addEventListener("paste", onPaste);
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this.editingContainer.addEventListener("copy", onCutOrCopy);
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this.editingContainer.addEventListener("oncut", onCutOrCopy);
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const editingShadow = this.editingContainer.attachShadow({ mode: "open" });
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this.editingArea = editingShadow.appendChild(document.createElement("editing-area")) as EditingArea;
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}
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initialize(index: number, label: string, color: string, content: string): void {
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this.labelContainer.id = `name${index}`;
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this.label.innerText = label;
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this.editingContainer.id = `f${index}`;
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this.editingArea.style.color = color;
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this.editingArea.innerHTML = content;
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if (fieldContainsInlineContent(this.editingArea)) {
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this.editingArea.appendChild(document.createElement("br"));
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}
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}
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fieldContent(): string {
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return this.editingArea.innerHTML;
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}
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}
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customElements.define("editor-field", EditorField);
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function adjustFieldAmount(amount: number): void {
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const fieldsContainer = document.getElementById("fields");
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while (fieldsContainer.childElementCount < amount) {
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fieldsContainer.appendChild(document.createElement("editor-field"))
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}
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while (fieldsContainer.childElementCount > amount) {
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fieldsContainer.removeChild(fieldsContainer.lastElementChild);
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}
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}
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function setFields(fields: [string, string][]): void {
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// webengine will include the variable after enter+backspace
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// if we don't convert it to a literal colour
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const color = window
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.getComputedStyle(document.documentElement)
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.getPropertyValue("--text-fg");
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adjustFieldAmount(fields.length);
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const fieldsContainer = document.getElementById("fields");
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const children = [...fieldsContainer.children]
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for (const [index, child] of children.entries()) {
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const [name, fieldContent] = fields[index];
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(child as EditorField).initialize(index, name, color, fieldContent);
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}
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maybeDisableButtons();
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}
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function setBackgrounds(cols: "dupe"[]) {
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for (let i = 0; i < cols.length; i++) {
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const element = document.querySelector(`#f${i}`);
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element.classList.toggle("dupe", cols[i] === "dupe");
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}
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}
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function setFonts(fonts: [string, number, boolean][]): void {
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for (let i = 0; i < fonts.length; i++) {
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const n = $(`#f${i}`);
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n.css("font-family", fonts[i][0]).css("font-size", fonts[i][1]);
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n[0].dir = fonts[i][2] ? "rtl" : "ltr";
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}
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}
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function setNoteId(id: number): void {
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currentNoteId = id;
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}
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function showDupes(): void {
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$("#dupes").show();
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}
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function hideDupes(): void {
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$("#dupes").hide();
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}
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let pasteHTML = function (
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html: string,
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internal: boolean,
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extendedMode: boolean
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): void {
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html = filterHTML(html, internal, extendedMode);
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if (html !== "") {
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setFormat("inserthtml", html);
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}
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};
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let filterHTML = function (
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html: string,
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internal: boolean,
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extendedMode: boolean
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): string {
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// wrap it in <top> as we aren't allowed to change top level elements
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const top = document.createElement("ankitop");
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top.innerHTML = html;
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if (internal) {
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filterInternalNode(top);
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} else {
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filterNode(top, extendedMode);
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}
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let outHtml = top.innerHTML;
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if (!extendedMode && !internal) {
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// collapse whitespace
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outHtml = outHtml.replace(/[\n\t ]+/g, " ");
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}
|
|
outHtml = outHtml.trim();
|
|
return outHtml;
|
|
};
|
|
|
|
let allowedTagsBasic = {};
|
|
let allowedTagsExtended = {};
|
|
|
|
let TAGS_WITHOUT_ATTRS = ["P", "DIV", "BR", "SUB", "SUP"];
|
|
for (const tag of TAGS_WITHOUT_ATTRS) {
|
|
allowedTagsBasic[tag] = { attrs: [] };
|
|
}
|
|
|
|
TAGS_WITHOUT_ATTRS = [
|
|
"B",
|
|
"BLOCKQUOTE",
|
|
"CODE",
|
|
"DD",
|
|
"DL",
|
|
"DT",
|
|
"EM",
|
|
"H1",
|
|
"H2",
|
|
"H3",
|
|
"I",
|
|
"LI",
|
|
"OL",
|
|
"PRE",
|
|
"RP",
|
|
"RT",
|
|
"RUBY",
|
|
"STRONG",
|
|
"TABLE",
|
|
"U",
|
|
"UL",
|
|
];
|
|
for (const tag of TAGS_WITHOUT_ATTRS) {
|
|
allowedTagsExtended[tag] = { attrs: [] };
|
|
}
|
|
|
|
allowedTagsBasic["IMG"] = { attrs: ["SRC"] };
|
|
|
|
allowedTagsExtended["A"] = { attrs: ["HREF"] };
|
|
allowedTagsExtended["TR"] = { attrs: ["ROWSPAN"] };
|
|
allowedTagsExtended["TD"] = { attrs: ["COLSPAN", "ROWSPAN"] };
|
|
allowedTagsExtended["TH"] = { attrs: ["COLSPAN", "ROWSPAN"] };
|
|
allowedTagsExtended["FONT"] = { attrs: ["COLOR"] };
|
|
|
|
const allowedStyling = {
|
|
color: true,
|
|
"background-color": true,
|
|
"font-weight": true,
|
|
"font-style": true,
|
|
"text-decoration-line": true,
|
|
};
|
|
|
|
let isNightMode = function (): boolean {
|
|
return document.body.classList.contains("nightMode");
|
|
};
|
|
|
|
let filterExternalSpan = function (elem: HTMLElement) {
|
|
// filter out attributes
|
|
for (const attr of [...elem.attributes]) {
|
|
const attrName = attr.name.toUpperCase();
|
|
|
|
if (attrName !== "STYLE") {
|
|
elem.removeAttributeNode(attr);
|
|
}
|
|
}
|
|
|
|
// filter styling
|
|
for (const name of [...elem.style]) {
|
|
const value = elem.style.getPropertyValue(name);
|
|
|
|
if (
|
|
!allowedStyling.hasOwnProperty(name) ||
|
|
// google docs adds this unnecessarily
|
|
(name === "background-color" && value === "transparent") ||
|
|
// ignore coloured text in night mode for now
|
|
(isNightMode() && (name === "background-color" || name === "color"))
|
|
) {
|
|
elem.style.removeProperty(name);
|
|
}
|
|
}
|
|
};
|
|
|
|
allowedTagsExtended["SPAN"] = filterExternalSpan;
|
|
|
|
// add basic tags to extended
|
|
Object.assign(allowedTagsExtended, allowedTagsBasic);
|
|
|
|
function isHTMLElement(elem: Element): elem is HTMLElement {
|
|
return elem instanceof HTMLElement;
|
|
}
|
|
|
|
// filtering from another field
|
|
let filterInternalNode = function (elem: Element) {
|
|
if (isHTMLElement(elem)) {
|
|
elem.style.removeProperty("background-color");
|
|
elem.style.removeProperty("font-size");
|
|
elem.style.removeProperty("font-family");
|
|
}
|
|
// recurse
|
|
for (let i = 0; i < elem.children.length; i++) {
|
|
const child = elem.children[i];
|
|
filterInternalNode(child);
|
|
}
|
|
};
|
|
|
|
// filtering from external sources
|
|
let filterNode = function (node: Node, extendedMode: boolean): void {
|
|
if (!nodeIsElement(node)) {
|
|
return;
|
|
}
|
|
|
|
// descend first, and take a copy of the child nodes as the loop will skip
|
|
// elements due to node modifications otherwise
|
|
for (const child of [...node.children]) {
|
|
filterNode(child, extendedMode);
|
|
}
|
|
|
|
if (node.tagName === "ANKITOP") {
|
|
return;
|
|
}
|
|
|
|
const tag = extendedMode
|
|
? allowedTagsExtended[node.tagName]
|
|
: allowedTagsBasic[node.tagName];
|
|
|
|
if (!tag) {
|
|
if (!node.innerHTML || node.tagName === "TITLE") {
|
|
node.parentNode.removeChild(node);
|
|
} else {
|
|
node.outerHTML = node.innerHTML;
|
|
}
|
|
} else {
|
|
if (typeof tag === "function") {
|
|
// filtering function provided
|
|
tag(node);
|
|
} else {
|
|
// allowed, filter out attributes
|
|
for (const attr of [...node.attributes]) {
|
|
const attrName = attr.name.toUpperCase();
|
|
if (tag.attrs.indexOf(attrName) === -1) {
|
|
node.removeAttributeNode(attr);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
};
|