stash

web/src/components/inputs/FormatedText.vue

@@ -0,0 +1,112 @@
+<template>
+    <div contenteditable @input="onchange" ref="text">
+    </div>
+</template>
+
+<script>
+export default {
+    name: 'FormatedText',
+    props: {
+        value: {
+            type: String,
+            required: true
+        },
+        format: {
+            type: Function,
+            default: null
+        }
+    },
+    data() {
+        return {
+            selection: {start: 0, end: 0, direction: 'forward', type: 'Caret'}
+        };
+    },
+    emits: ['input'],
+    methods: {
+        rawhtml(value) {
+            if (typeof this.format === 'function') {
+                return this.format(value.replace(/ /g, '&nbsp;'));
+            } else {
+                return value;
+            }
+        },
+        onchange(event) {
+            const div = this.$refs.text;
+            const sel = window.getSelection();
+            if (sel.rangeCount > 0) {
+                this.selection.start = this.calculateOffset(div, sel.anchorNode, sel.anchorOffset);
+                this.selection.end = this.calculateOffset(div, sel.focusNode, sel.focusOffset);
+                this.selection.direction = sel.direction;
+                this.selection.type = sel.type;
+            }
+            this.$emit('input', event.target.innerText.replace(/&nbsp;/g, ' ').replace(/\xA0/g, ' '));
+        },
+        calculateOffset(container, node, offset) {
+            let position = 0;
+            let found = false;
+            const walk = (elem) => {
+                if (elem === node) {
+                    found = true;
+                    return;
+                }
+                if (elem.nodeType === 3) {
+                    position += elem.length;
+                } else {
+                    for (let i = 0; i < elem.childNodes.length; i++) {
+                        walk(elem.childNodes[i]);
+                        if (found) {
+                            return;
+                        }
+                    }
+                }
+            };
+            walk(container);
+            return position + offset;
+        },
+        findNode(container, offset) {
+            let position = 0;
+            let found = false;
+            let node = null;
+            const walk = (elem) => {
+                if (position + elem.length >= offset) {
+                    found = true;
+                    node = elem;
+                    return;
+                }
+                if (elem.nodeType === 3) {
+                    position += elem.length;
+                } else {
+                    for (let i = 0; i < elem.childNodes.length; i++) {
+                        walk(elem.childNodes[i]);
+                        if (found) {
+                            return;
+                        }
+                    }
+                }
+            };
+            walk(container);
+            return [node, offset - position]
+        },
+    },
+    watch: {
+        value() {
+            if (this.selection) {
+                const div = this.$refs.text;
+                div.innerHTML = this.rawhtml(this.value);
+
+                const range = document.createRange();
+                const sel = window.getSelection();
+                range.setStart(...this.findNode(div, this.selection.start));
+                range.setEnd(...this.findNode(div, this.selection.end));
+
+                sel.removeAllRanges();
+                sel.addRange(range);
+            }
+        }
+    },
+    mounted() {
+        const div = this.$refs.text;
+        div.innerHTML = this.rawhtml(this.value);
+    }
+};
+</script>