views/tags: add tag input control

For now, without tag relations

9 files changed, 482 insertions, 28 deletions

diff --git a/client/css/colors.styl b/client/css/colors.styl
index 8cdf54f..a7900fc 100644
--- a/client/css/colors.styl
+++ b/client/css/colors.styl
@@ -27,3 +27,7 @@ $button-enabled-text-color = white
 $button-enabled-background-color = $main-color
 $button-disabled-text-color = #666
 $button-disabled-background-color = #CCC
+$new-tag-background-color = #DFC
+$new-tag-text-color = black
+$duplicate-tag-background-color = #FDC
+$duplicate-tag-text-color = black
diff --git a/client/css/forms.styl b/client/css/forms.styl
index 406482e..2a294bc 100644
--- a/client/css/forms.styl
+++ b/client/css/forms.styl
@@ -31,14 +31,18 @@ form
 form.tabular
     ul
         display: table
+        table-layout: fixed
         width: 100%
         li
             display: table-row
             label:not(.radio):not(.checkbox):not(.file-dropper)
                 display: table-cell
                 width: 33%
+                text-align: right
+                padding-right: 1em
     .messages, .buttons
         margin-left: 33%
+        padding-left: 1em
 
 form.horizontal
     display: inline-block
@@ -146,6 +150,7 @@ input[type=checkbox]:focus + .checkbox:before
 /*
  * Regular inputs
  */
+div.tag-input,
 select,
 textarea,
 input[type=text],
@@ -177,6 +182,30 @@ input[type=password]
         background: $input-disabled-background-color
         color: $input-disabled-text-color
 
+div.tag-input
+    min-height: 3.3em
+    vertical-align: top
+    display: inline-block
+    cursor: text
+    word-wrap: break-word
+    a
+        line-height: 110%
+        position: relative
+        z-index: 1
+    span
+        line-height: 110%
+        &.new a
+            background: $new-tag-background-color
+            color: $new-tag-text-color
+        &.duplicate a
+            background: $duplicate-tag-background-color
+            color: $duplicate-tag-text-color
+        &.editable
+            outline: 0
+            padding-right: 0.2em
+            &:last-child
+                padding-left: 0.2em
+
 label.color
     position: relative
     input[type=text]
diff --git a/client/js/controllers/tags_controller.js b/client/js/controllers/tags_controller.js
index dfead15..c096c16 100644
--- a/client/js/controllers/tags_controller.js
+++ b/client/js/controllers/tags_controller.js
@@ -98,8 +98,8 @@ class TagsController {
     _show(tag, section) {
         topNavController.activate('tags');
         const categories = {};
-        for (let [key, category] of tags.getExport().categories) {
-            categories[key] = category.name;
+        for (let category of tags.getAllCategories()) {
+            categories[category.name] = category.name;
         }
         this.tagView.render({
             tag: tag,
diff --git a/client/js/tags.js b/client/js/tags.js
index ceaa85a..359d997 100644
--- a/client/js/tags.js
+++ b/client/js/tags.js
@@ -4,14 +4,47 @@ const request = require('superagent');
 const util = require('./util/misc.js');
 const events = require('./events.js');
 
-let _export = null;
+let _tags = null;
+let _categories = null;
 let _stylesheet = null;
 
+function getTagByName(name) {
+    return _tags.get(name.toLowerCase());
+}
+
+function getCategoryByName(name) {
+    return _categories.get(name.toLowerCase());
+}
+
+function getNameToTagMap() {
+    return _tags;
+}
+
+function getAllTags() {
+    return _tags.values();
+}
+
+function getAllCategories() {
+    return _categories.values();
+}
+
+function getOriginalTagName(name) {
+    const actualTag = getTagByName(name);
+    if (actualTag) {
+        for (let originalName of actualTag.names) {
+            if (originalName.toLowerCase() == name.toLowerCase()) {
+                return originalName;
+            }
+        }
+    }
+    return name;
+}
+
 function _tagsToMap(tags) {
     let map = new Map();
     for (let tag of tags) {
         for (let name of tag.names) {
-            map.set(name, tag);
+            map.set(name.toLowerCase(), tag);
         }
     }
     return map;
@@ -20,7 +53,7 @@ function _tagsToMap(tags) {
 function _tagCategoriesToMap(categories) {
     let map = new Map();
     for (let category of categories) {
-        map.set(category.name, category);
+        map.set(category.name.toLowerCase(), category);
     }
     return map;
 }
@@ -31,7 +64,7 @@ function _refreshStylesheet() {
     }
     _stylesheet = document.createElement('style');
     document.head.appendChild(_stylesheet);
-    for (let category of _export.categories.values()) {
+    for (let category of getAllCategories()) {
         _stylesheet.sheet.insertRule(
             '.tag-{0} { color: {1} }'.format(category.name, category.color),
             _stylesheet.sheet.cssRules.length);
@@ -42,27 +75,28 @@ function refreshExport() {
     return new Promise((resolve, reject) => {
         request.get('/data/tags.json').end((error, response) => {
             if (error) {
-                _export = {tags: {}, categories: {}};
+                _tags = new Map();
+                _categories = new Map();
                 reject(error);
             }
-            _export = response.body;
-            _export.tags = _tagsToMap(_export.tags);
-            _export.categories = _tagCategoriesToMap(_export.categories);
+            _tags = _tagsToMap(response.body.tags);
+            _categories = _tagCategoriesToMap(response.body.categories);
             _refreshStylesheet();
             resolve();
         });
     });
 }
 
-function getExport() {
-    return _export || {};
-}
-
 events.listen(
     events.TagsChange,
     () => { refreshExport(); return true; });
 
 module.exports = {
-    getExport: getExport,
+    getAllCategories: getAllCategories,
+    getAllTags: getAllTags,
+    getTagByName: getTagByName,
+    getCategoryByName: getCategoryByName,
+    getNameToTagMap: getNameToTagMap,
+    getOriginalTagName: getOriginalTagName,
     refreshExport: refreshExport,
 };
diff --git a/client/js/util/views.js b/client/js/util/views.js
index 38de199..2e032ed 100644
--- a/client/js/util/views.js
+++ b/client/js/util/views.js
@@ -138,10 +138,9 @@ function makeColorInput(options) {
 }
 
 function makeTagLink(name) {
-    const tagExport = tags.getExport();
     let category = null;
     try {
-        category = tagExport.tags.get(name).category;
+        category = tags.getTagByName(name).category;
     } catch (e) {
         category = 'unknown';
     }
@@ -321,7 +320,8 @@ function scrollToHash() {
 }
 
 document.addEventListener('input', e => {
-    if (e.target.getAttribute('type').toLowerCase() === 'color') {
+    const type = e.target.getAttribute('type');
+    if (type && type.toLowerCase() === 'color') {
         const textInput = e.target.parentNode.querySelector('input[type=text]');
         textInput.style.color = e.target.value;
         textInput.value = e.target.value;
diff --git a/client/js/views/auto_complete_control.js b/client/js/views/auto_complete_control.js
index 9416ce1..6c8bc5a 100644
--- a/client/js/views/auto_complete_control.js
+++ b/client/js/views/auto_complete_control.js
@@ -28,6 +28,7 @@ class AutoCompleteControl {
     constructor(input, options) {
         this.input = input;
         this.options = lodash.extend({}, {
+            verticalShift: 2,
             source: null,
             maxResults: 15,
             getTextToFind: () => {
@@ -229,7 +230,7 @@ class AutoCompleteControl {
         this.suggestionDiv.style.left = '-9999px';
         this.suggestionDiv.style.top = '-9999px';
         this.show();
-        const borderSize = 2;
+        const verticalShift = this.options.verticalShift;
         const inputRect = this.input.getBoundingClientRect();
         const bodyRect = document.body.getBoundingClientRect();
         const viewPortHeight = bodyRect.bottom - bodyRect.top;
@@ -242,8 +243,8 @@ class AutoCompleteControl {
 
         let x = inputRect.left - bodyRect.left;
         let y = direction == 1 ?
-            inputRect.bottom - bodyRect.top - borderSize :
-            inputRect.top - bodyRect.top - listRect.height + borderSize;
+            inputRect.bottom - bodyRect.top - verticalShift :
+            inputRect.top - bodyRect.top - listRect.height + verticalShift;
 
         // remove offscreen items until whole suggestion list can fit on the
         // screen
diff --git a/client/js/views/tag_auto_complete_control.js b/client/js/views/tag_auto_complete_control.js
index b58fef9..7bb9090 100644
--- a/client/js/views/tag_auto_complete_control.js
+++ b/client/js/views/tag_auto_complete_control.js
@@ -6,7 +6,7 @@ const AutoCompleteControl = require('./auto_complete_control.js');
 
 class TagAutoCompleteControl extends AutoCompleteControl {
     constructor(input, options) {
-        const allTags = tags.getExport().tags;
+        const allTags = tags.getNameToTagMap();
         const caseSensitive = false;
         const minLengthForPartialSearch = 3;
 
@@ -30,7 +30,7 @@ class TagAutoCompleteControl extends AutoCompleteControl {
                         caption:
                             '<span class="tag-{0}">{1} ({2})</span>'.format(
                                 kv[1].category,
-                                kv[0],
+                                tags.getOriginalTagName(kv[0]),
                                 kv[1].usages),
                         value: kv[0],
                     };
diff --git a/client/js/views/tag_input_control.js b/client/js/views/tag_input_control.js
new file mode 100644
index 0000000..15498dd
--- /dev/null
+++ b/client/js/views/tag_input_control.js
@@ -0,0 +1,387 @@
+'use strict';
+
+const tags = require('../tags.js');
+const views = require('../util/views.js');
+const TagAutoCompleteControl = require('./tag_auto_complete_control.js');
+
+const KEY_A = 65;
+const KEY_END = 35;
+const KEY_HOME = 36;
+const KEY_LEFT = 37;
+const KEY_RIGHT = 39;
+const KEY_SPACE = 32;
+const KEY_RETURN = 13;
+const KEY_BACKSPACE = 8;
+const KEY_DELETE = 46;
+
+class TagInputControl {
+    constructor(sourceInputNode) {
+        this.tags = [];
+        this.readOnly = sourceInputNode.readOnly;
+
+        this._autoCompleteControls = [];
+
+        this._sourceInputNode = sourceInputNode;
+
+        // set up main edit area
+        this._editAreaNode = views.htmlToDom('<div class="tag-input"></div>');
+        this._editAreaNode.autocorrect = false;
+        this._editAreaNode.autocapitalize = false;
+        this._editAreaNode.spellcheck = false;
+        this._editAreaNode.addEventListener(
+            'click', e => this._evtEditAreaClick(e));
+
+        // set up tail editor
+        this._tailWrapperNode = this._createWrapper();
+        if (!this.readOnly) {
+            this._tailInputNode = this._createInput();
+            this._tailInputNode.tabIndex = 0;
+            this._tailWrapperNode.appendChild(this._tailInputNode);
+        } else {
+            this._tailInputNode = null;
+        }
+        this._editAreaNode.appendChild(this._tailWrapperNode);
+
+        // add existing tags
+        this.addMultipleTags(sourceInputNode.value);
+
+        // show
+        sourceInputNode.style.display = 'none';
+        sourceInputNode.parentNode.insertBefore(
+            this._editAreaNode, sourceInputNode.nextSibling);
+    }
+
+    addMultipleTags(text, sourceNode) {
+        for (let tag of text.split(/\s+/).filter(word => word)) {
+            this.addTag(tag, sourceNode);
+        }
+    }
+
+    addTag(text, sourceNode) {
+        text = tags.getOriginalTagName(text);
+
+        if (!sourceNode) {
+            sourceNode = this._tailWrapperNode;
+        }
+
+        if (!text) {
+            return;
+        }
+
+        // TODO: add implications
+
+        if (this.tags.map(tag => tag.toLowerCase())
+                .includes(text.toLowerCase())) {
+            this._getWrapperFromTag(text).classList.add('duplicate');
+            return;
+        }
+
+        this._hideVisualCues();
+
+        this.tags.push(text);
+        this._sourceInputNode.value = this.tags.join(' ');
+
+        const sourceWrapperNode = this._getWrapperFromChild(sourceNode);
+        const targetWrapperNode = this._createWrapper();
+        if (!this.readOnly) {
+            targetWrapperNode.appendChild(this._createInput());
+        }
+        if (!tags.getTagByName(text)) {
+            targetWrapperNode.classList.add('new');
+        }
+        targetWrapperNode.appendChild(this._createLink(text));
+        targetWrapperNode.setAttribute('data-tag', text);
+        this._editAreaNode.insertBefore(targetWrapperNode, sourceWrapperNode);
+        this._editAreaNode.insertBefore(this._createSpace(), sourceWrapperNode);
+    }
+
+    deleteTag(tag) {
+        if (!tag) {
+            return;
+        }
+        if (!this.tags.map(tag => tag.toLowerCase())
+                .includes(tag.toLowerCase())) {
+            return;
+        }
+        this._hideVisualCues();
+        this.tags = this.tags.filter(t => t.toLowerCase() != tag.toLowerCase());
+        this._sourceInputNode.value = this.tags.join(' ');
+        for (let wrapperNode of this._getAllWrapperNodes()) {
+            if (this._getTagFromWrapper(wrapperNode).toLowerCase() ==
+                    tag.toLowerCase()) {
+                if (wrapperNode.contains(document.activeElement)) {
+                    const nextWrapperNode = this._getNextWrapper(wrapperNode);
+                    const nextInputNode =
+                        nextWrapperNode.querySelector('.editable');
+                    if (nextInputNode) {
+                        nextInputNode.focus();
+                    }
+                }
+                this._editAreaNode.removeChild(wrapperNode);
+                break;
+            }
+        }
+    }
+
+    _evtEditAreaClick(e) {
+        if (e.target.nodeName.toLowerCase() === 'a') {
+            return;
+        }
+
+        if (this.readOnly) {
+            return;
+        }
+
+        e.preventDefault();
+
+        let closestInputNode = null;
+        let closestDistance = Infinity;
+
+        const mouseX = e.clientX;
+        const mouseY = e.clientY;
+
+        for (let wrapperNode of this._getAllWrapperNodes()) {
+            const inputNode = wrapperNode.querySelector('.editable');
+            if (!inputNode) {
+                continue;
+            }
+            const inputNodeRect = inputNode.getBoundingClientRect();
+            const inputNodeX = inputNodeRect.left;
+            const inputNodeY = inputNodeRect.top;
+            const distance = Math.sqrt(
+                Math.pow(mouseX - inputNodeX, 2) +
+                Math.pow(mouseY - inputNodeY, 2));
+            if (distance < closestDistance) {
+                closestDistance = distance;
+                closestInputNode = inputNode;
+            }
+        }
+
+        if (closestDistance > 25) {
+            closestInputNode = this._tailInputNode;
+        }
+
+        closestInputNode.focus();
+    }
+
+    _evtInputPaste(e) {
+        e.preventDefault();
+        const pastedText = window.clipboardData ?
+            window.clipboardData.getData('Text') :
+            (e.originalEvent || e).clipboardData.getData('text/plain');
+
+        if (pastedText.length > 2000) {
+            window.alert('Pasted text is too long.');
+            return;
+        }
+        this.addMultipleTags(pastedText);
+    }
+
+    _evtInputKeyDown(e) {
+        const inputNode = e.target;
+        const wrapperNode = this._getWrapperFromChild(inputNode);
+        const key = e.which;
+
+        if (key == KEY_A && e.ctrlKey) {
+            e.preventDefault();
+            e.stopImmediatePropagation();
+            e.stopPropagation();
+            const selection = window.getSelection();
+            const range = document.createRange();
+            range.selectNode(this._editAreaNode);
+            selection.removeAllRanges();
+            selection.addRange(range);
+        }
+
+        if (key == KEY_HOME) {
+            if (window.getSelection().getRangeAt(0).startOffset !== 0) {
+                return;
+            }
+            e.preventDefault();
+            this._getAllWrapperNodes()[0].querySelector('.editable').focus();
+        }
+
+        if (key == KEY_END) {
+            if (window.getSelection().getRangeAt(0).endOffset !==
+                    inputNode.textContent.length) {
+                return;
+            }
+            e.preventDefault();
+            this._getAllWrapperNodes()[this._getAllWrapperNodes().length - 1]
+                .querySelector('.editable').focus();
+        }
+
+        if (key == KEY_LEFT) {
+            if (window.getSelection().getRangeAt(0).startOffset !== 0) {
+                return;
+            }
+            e.preventDefault();
+            const prevWrapperNode = this._getPreviousWrapper(wrapperNode);
+            if (prevWrapperNode) {
+                prevWrapperNode.querySelector('.editable').focus();
+            }
+        }
+
+        if (key == KEY_RIGHT) {
+            if (window.getSelection().getRangeAt(0).endOffset !==
+                    inputNode.textContent.length) {
+                return;
+            }
+            e.preventDefault();
+            const nextWrapperNode = this._getNextWrapper(wrapperNode);
+            if (nextWrapperNode) {
+                nextWrapperNode.querySelector('.editable').focus();
+            }
+        }
+
+        if (key == KEY_BACKSPACE) {
+            if (inputNode.textContent !== '') {
+                return;
+            }
+            e.preventDefault();
+            const prevWrapperNode = this._getPreviousWrapper(wrapperNode);
+            this.deleteTag(this._getTagFromWrapper(prevWrapperNode));
+        }
+
+        if (key == KEY_DELETE) {
+            if (inputNode.textContent !== '') {
+                return;
+            }
+            e.preventDefault();
+            if (!wrapperNode.contains(this._mainEditNode)) {
+                this.deleteTag(this._getTagFromWrapper(wrapperNode));
+            }
+        }
+
+        if (key == KEY_RETURN || key == KEY_SPACE) {
+            e.preventDefault();
+            this.addTag(inputNode.textContent, inputNode);
+            inputNode.innerHTML = '';
+        }
+    }
+
+    _evtInputBlur(e) {
+        const inputNode = e.target;
+        this.addTag(inputNode.textContent, inputNode);
+        inputNode.innerHTML = '';
+    }
+
+    _evtLinkClick(e) {
+        e.preventDefault();
+        // TODO: show suggestions and siblings
+    }
+
+    _getWrapperFromChild(startNode) {
+        let node = startNode;
+        while (node) {
+            if ('classList' in node && node.classList.contains('wrapper')) {
+                return node;
+            }
+            node = node.parentNode;
+        }
+        throw Error('Wrapper node not found');
+    }
+
+    _getPreviousWrapper(wrapperNode) {
+        let result = wrapperNode.previousSibling;
+        while (result && result.nodeType === 3) {
+            result = result.previousSibling;
+        }
+        return result;
+    }
+
+    _getNextWrapper(wrapperNode) {
+        let result = wrapperNode.nextSibling;
+        while (result && result.nodeType === 3) {
+            result = result.nextSibling;
+        }
+        return result;
+    }
+
+    _getAllWrapperNodes() {
+        const result = [];
+        for (let child of this._editAreaNode.childNodes) {
+            if (child.nodeType === 3) {
+                continue;
+            }
+            result.push(child);
+        }
+        return result;
+    }
+
+    _getTagFromWrapper(wrapperNode) {
+        if (!wrapperNode || !wrapperNode.hasAttribute('data-tag')) {
+            return null;
+        }
+        return wrapperNode.getAttribute('data-tag');
+    }
+
+    _getWrapperFromTag(tag) {
+        for (let wrapperNode of this._getAllWrapperNodes()) {
+            if (this._getTagFromWrapper(wrapperNode).toLowerCase() ==
+                    tag.toLowerCase()) {
+                return wrapperNode;
+            }
+        }
+        return null;
+    }
+
+    _createWrapper() {
+        return views.htmlToDom('<span class="wrapper"></span>');
+    }
+
+    _createSpace(text) {
+        // space between elements serves two purposes:
+        // - the wrappers play nicely with word-wrap: break-word
+        // - copying the input text to clipboard shows spaces
+        return document.createTextNode(' ');
+    }
+
+    _createInput(text) {
+        const inputNode = views.htmlToDom(
+            '<span class="editable" contenteditable>');
+        const autoCompleteControl = new TagAutoCompleteControl(
+            inputNode, {
+                getTextToFind: () => {
+                    return inputNode.textContent;
+                },
+                confirm: text => {
+                    const wrapperNode = this._getWrapperFromChild(inputNode);
+                    inputNode.innerHTML = '';
+                    this.addTag(text, inputNode);
+                },
+                verticalShift: -2,
+            });
+        inputNode.addEventListener('keydown', e => this._evtInputKeyDown(e));
+        inputNode.addEventListener('paste', e => this._evtInputPaste(e));
+        inputNode.addEventListener('blur', e => this._evtInputBlur(e));
+        this._autoCompleteControls.push(autoCompleteControl);
+        return inputNode;
+    }
+
+    _createLink(text) {
+        const actualTag = tags.getTagByName(text);
+        const link = views.htmlToDom(
+            views.makeNonVoidElement(
+                'a',
+                {
+                    class: actualTag ? 'tag-' + actualTag.category : '',
+                    href: '/tag/' + text,
+                },
+                text));
+        link.addEventListener('click', e=> this._evtLinkClick(e));
+        return link;
+    }
+
+    _hideVisualCues() {
+        for (let wrapperNode of this._getAllWrapperNodes()) {
+            wrapperNode.classList.remove('duplicate');
+        }
+        for (let autoCompleteControl of this._autoCompleteControls) {
+            autoCompleteControl.hide();
+        }
+        // TODO: hide suggestions and siblings
+    }
+}
+
+module.exports = TagInputControl;
diff --git a/client/js/views/tag_summary_view.js b/client/js/views/tag_summary_view.js
index 3300c4a..8b5b19d 100644
--- a/client/js/views/tag_summary_view.js
+++ b/client/js/views/tag_summary_view.js
@@ -2,7 +2,7 @@
 
 const config = require('../config.js');
 const views = require('../util/views.js');
-const TagAutoCompleteControl = require('./tag_auto_complete_control.js');
+const TagInputControl = require('./tag_input_control.js');
 
 function split(str) {
     return str.split(/\s+/).filter(s => s);
@@ -23,15 +23,14 @@ class TagSummaryView {
         const form = source.querySelector('form');
         const namesField = source.querySelector('.names input');
         const categoryField = source.querySelector('.category select');
-        const implicationsField =
-            source.querySelector('.implications input');
+        const implicationsField = source.querySelector('.implications input');
         const suggestionsField = source.querySelector('.suggestions input');
 
         if (implicationsField) {
-            new TagAutoCompleteControl(implicationsField);
+            new TagInputControl(implicationsField);
         }
         if (suggestionsField) {
-            new TagAutoCompleteControl(suggestionsField);
+            new TagInputControl(suggestionsField);
         }
 
         views.decorateValidator(form);