- class Caret {
- constructor(view) {
- self = this;
- self.view = view;
- self.singleClick = false;
-
- let caret = this.element = $('<span id="caret"><textarea></textarea></span>');
-
- // When user writes into caret, add it to the document.
- $('textarea', caret).on('input', function() {
- let v = $(this).val();
- $(this).val('');
- self.insertChar(v);
-
- });
-
- // On click on x-node element, set caret position.
- self.view.on('click', '*[x-node]', function(e) {
- if (e.redakcja_caret_inserted) return;
- e.redakcja_caret_inserted = true;
-
- if (self.singleClick) {
- self.singleClick = false;
- return;
- }
-
- self.detach();
-
- var selection = window.getSelection();
- if (!selection.isCollapsed) return;
-
- self.singleClick = true;
- setTimeout(function() {
- if (self.singleClick) {
- self.element.insertBefore(
- selection.anchorNode.splitText(
- selection.anchorOffset
- )
- )
- self.focus();
- }
- self.singleClick = false;
- }, 250);
-
- });
-
- self.view.on('keydown', function(e) {
- // TODO:
- // Enter (split block)
- // delete selection?
-
- // cases:
- // we are in <akap> (no going up)
- // we are in <wyroznienie> (can go up)
- // we are next to <wyroznienie> (can go inside)
-
- switch (e.key) {
- case "ArrowRight":
- if (e.shiftKey) {
- self.detach();
- return;
- }
-
- self.moveRight();
- break;
- case "ArrowLeft":
- if (e.shiftKey) {
- self.detach();
- return;
- }
-
- self.moveLeft();
- break;
- case "ArrowUp":
- if (e.shiftKey) {
- self.detach();
- return;
- }
- break;
- case "ArrowDown":
- if (e.shiftKey) {
- self.detach();
- return;
- }
- break;
- case "Backspace":
- self.deleteBefore();
- break;
- case "Delete":
- self.deleteAfter();
- break;
-// default:
-// console.log('key', e.key, e.code);
- }
- })
- }
-
- get attached() {
- return this.element.parent().length;
- }
-
- detach() {
- let p;
- if (this.attached) {
- p = this.element.parent()[0]
- this.element.detach();
- p.normalize()
- }
- }
-
- focus() {
- $("textarea", self.element).focus();
- }
-
- normalize() {
- this.element.parent()[0].normalize();
- }
-
- insertChar(ch) {
- $(document.createTextNode(ch)).insertBefore(this.element);
- this.normalize();
- }
-
- deleteBefore() {
- let contents = this.element.parent().contents();
- // Find the text before caret.
- let textBefore = contents[contents.index(this.element) - 1];
-
- // Should be text, but what if not?
- textBefore.textContent = textBefore.textContent.substr(0, textBefore.textContent.length - 1);
- this.normalize();
-
- }
-
- deleteAfter() {
- let contents = this.element.parent().contents();
- // Find the text after caret.
- let textAfter = contents[contents.index(this.element) + 1];
- textAfter.textContent = textAfter.textContent.substr(1);
- }
-
- moveLeft() {
- this.move({
- move: -1,
- edge: (i, l) => {return !i;},
- enter: (l) => {return l - 1;},
- splitTarget: (t) => {return t.splitText(t.length - 1);},
- noSplitTarget: (t) => {return t.splitText(t.length);},
- })
- }
-
- moveRight() {
- this.move({
- move: 1,
- edge: (i, l) => {return i == l - 1;},
- enter: (l) => {return 0;},
- splitTarget: (t) => {return t.splitText(1);},
- noSplitTarget: (t) => {return t;},
- })
- }
-
- move(opts) {
- if (!this.attached) return;
- this.normalize();
-
- let contents = this.element.parent().contents();
- let index = contents.index(this.element);
- let target, moved, oldparent;
-
- let parent = this.element.parent()[0];
-
- if (opts.edge(index, contents.length)) {
- // We're at the end -- what to do?
- // can we go up?
-
- if (parent.nodeName == 'EM') {
- oldparent = parent;
- parent = parent.parentNode;
- contents = $(parent).contents();
- index = contents.index(oldparent);
- }
- }
-
- index += opts.move;
- target = contents[index];
- moved = false;
-
- while (target.nodeType == 1) {
- // we've encountered a node.
- // can we go inside?
-
- if (target.nodeName == 'EM') {
- // enter
- parent = $(target);
- contents = parent.contents();
- index = opts.enter(contents.length);
- target = contents[index];
-
- // what if it has no elements?
- } else {
- // skip
- index += opts.move; // again, what if end?
- target = contents[index];
- moved = true;
- }
-
- // if editable?
- // what if editable but empty?
-
- }
-
- if (target.nodeType == 3) {
- if (!moved) {
- target = opts.splitTarget(target);
- } else {
- target = opts.noSplitTarget(target);
- }
-
- this.element.insertBefore(target);
- }
- this.normalize();
- this.focus();
- }
- }
-
fnp / redakcja.git / blobdiff