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"use strict"; |
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/** |
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Utility for interactive file attachment. Supports attachment |
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selection from a file dialog, from the clipboard, or drag/drop. |
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Requires that window.fossil has already been set up. |
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Depends on fossil.dom. |
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*/ |
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(function(namespace){ |
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"use strict"; |
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const F = namespace, D = F.dom; |
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let idCounter = 0; |
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/** |
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Implements a multi-file selector widget. Intended to be plugged |
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in to places in Fossil's UI where attachments can be assigned to |
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an artifact. |
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*/ |
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class Attacher { |
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/* Options. */ |
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#opt; |
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/* List of objects representing each row. */ |
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#rows = []; |
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/* DOM elements */ |
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#e = Object.create(null); |
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/* Proxy for various events this object fires. */ |
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#events = new EventTarget(); |
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/** |
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Options: |
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opt.container: Optional DOM element to append the resulting |
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widget to. If not set, the client can get access to the widget |
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element using this.body. |
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opt.addButtonLabel: optional label for the "add attachment" |
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button, defaulting to something generic. |
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opt.limit: optional max number of attachments to allow. This |
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defaults to "some sensible value". |
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opt.startWith[=0]: if >0 then that many file selection widgets |
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are automatically activated, as if the user had tapped the Add |
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button that many times. |
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opt.description[=true]: if true then show the file description |
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field, otherwise elide it. |
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opt.reverse[=false]: reverses the flow of the widget such that |
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the Add button stays on the top and rows are ordered |
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most-recently-added. |
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opt.controls = [array of DOM elements]. Optional DOM elements |
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to inject into the UI element which wraps the "Add" button. |
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See this.controlsElement. |
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opt.listener = function or object: {add: func, remove: func, |
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populate: func}: if these are functions they are registered as |
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listeners for 'entry-added', 'entry-removed', and/or |
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'entry-populated' events, described below. opt.listener.all, if |
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set, is used as a fallback for any of 'add', 'remove', or |
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'populate' which are not set. If opt.listener is a function |
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then it behaves as if listener={all: thatFunction}. |
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Events: |
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This class fires CustomEvents for certain changes: |
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'entry-added' and 'entry-removed' trigger when an attachment |
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entry row is added/removed. Its event.detail is: |
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{attacher: this, row: object, type: 'same as event type'}. |
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'entry-populated' is triggered when a visible entry gets |
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content attached to it, with the same detail structure as |
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described above. |
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The public structure of the row object passed to each is |
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currently TBD. |
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*/ |
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constructor(opt){ |
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this.#opt = opt = F.nu({ |
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addButtonLabel: false, |
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startWith: 0, |
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limit: 0, |
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dryRun: undefined, |
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description: true, |
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reverse: false |
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}, opt); |
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this.#e.body = D.addClass(D.div(), 'Attacher'); |
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if( opt.reverse ) this.#e.body.classList.add('reverse'); |
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const eBtnAdd = this.#e.btnAdd = D.addClass( |
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D.button(this.#opt.addButtonLabel || 'Add attachment', |
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()=>this.#addRow()), |
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'attach-add-button' |
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); |
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eBtnAdd.type = 'button'; |
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opt.ownsAddButton = true; |
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this.#e.err = D.addClass(D.div(), 'error', 'hidden'); |
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this.#e.body.append(this.#e.err); |
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this.#e.err.addEventListener('dblclick',()=>this.reportError()); |
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const eControls = this.#e.controls = |
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D.addClass(D.div(), 'attach-controls'); |
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eControls.append(eBtnAdd); |
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if( opt.container ){ |
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opt.container.appendChild(this.#e.body); |
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} |
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this.#e.body.appendChild(eControls); |
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if( opt.listener ){ |
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const doCb = (eventType, key)=>{ |
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const f = (opt.listener instanceof Function) |
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? opt.listener |
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: (opt.listener[key] || opt.listener.all); |
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if( f instanceof Function ){ |
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this.addEventListener(eventType, f); |
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} |
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}; |
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doCb('entry-added', 'add'); |
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doCb('entry-removed', 'remove'); |
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doCb('entry-populated', 'populate'); |
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} |
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if( opt.dryRun ){ |
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/* Add dry-run toggle for testing. */ |
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const eLbl = D.label(false, "Dry-run?"); |
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const eCb = D.checkbox(true); |
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eLbl.append(eCb); |
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eControls.append(eLbl); |
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eCb.checked = opt.dryRun = true; |
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eCb.addEventListener('change',()=>opt.dryRun=eCb.checked); |
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} |
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if( Array.isArray(opt.controls) ){ |
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eControls.append(...opt.controls); |
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} |
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if( opt.startWith > 0 ){ |
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for(let i = 0; i < opt.startWith; ++i ){ |
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this.#addRow(); |
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} |
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}else{ |
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this.#updateControls(); |
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} |
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} |
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get widget(){ |
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return this.#e.body; |
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} |
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addEventListener(...args){ |
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return this.#events.addEventListener(...args); |
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} |
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removeEventListener(...args){ |
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return this.#events.removeEventListener(...args); |
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} |
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/** Returns true if any visible input widgets have content |
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selected. */ |
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get isPopulated(){ |
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for(let r of this.#rows){ |
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if( r.file ) return true; |
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} |
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return false; |
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} |
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get isDryRun(){ |
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return !!this.#opt.dryRun; |
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} |
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/** |
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Returns the DOM element (div.attach-controls) which wraps the |
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"Add" button. Clients may add buttons to it. |
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*/ |
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get controlsElement(){ |
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return this.#e.controls; |
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} |
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/** |
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Reports an error by appending each argument to the error widget |
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and unhiding it. If passed no arugments, it clears and hides |
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the error widget. |
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*/ |
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reportError(...msg){ |
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const e = this.#e.err; |
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D.clearElement(e); |
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if( msg.length ){ |
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e.classList.remove('hidden'); |
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e.append(...msg); |
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}else{ |
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e.classList.add('hidden'); |
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} |
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} |
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#removeRow(rowObj){ |
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rowObj.e.row.remove(); |
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this.#rows = this.#rows.filter(v=>v!==rowObj); |
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this.#updateControls(); |
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this.#events.dispatchEvent( |
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new CustomEvent('entry-removed',{ |
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detail: F.nu({ |
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type: 'entry-removed', |
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row: rowObj, |
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attacher: this |
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}) |
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}) |
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); |
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} |
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/** |
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Removes all attachments and clears the error state. |
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*/ |
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clear(){ |
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for(const r of [...this.#rows/*clone because this updates #rows*/]){ |
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this.#removeRow(r); |
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} |
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this.reportError(); |
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} |
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/** |
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Hides or shows the Add button, as appropriate. |
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*/ |
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#updateControls(){ |
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const b = this.#e.btnAdd; |
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if( this.#opt.limit>0 && this.#rows.length >= this.#opt.limit ){ |
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b.classList.add('hidden'); |
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D.disable(b); |
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//F.toast.warning("Attachment form limit reached."); |
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}else{ |
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b.classList.remove('hidden'); |
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D.enable(b); |
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if( this.#opt.ownsAddButton ){ |
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this.#e.body.append(this.#e.controls/*move to the end*/); |
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} |
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} |
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} |
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/** |
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Returns the "Add" button widget, Passing control of it to the |
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caller so that they can place it in another location. This |
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object will still manage its enabled/disabled/hidden state but |
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will no longer move it when adding a row. |
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*/ |
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takeAddButton(){ |
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if( this.#opt.ownsAddButton ){ |
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this.#opt.ownsAddButton; |
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} |
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return this.#e.btnAdd; |
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} |
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/** |
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Sets rowObj.e.err up with an error message, or clears it if |
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passed only 1 argument. |
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*/ |
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#rowError(rowObj,...msg){ |
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let e = rowObj.e.err; |
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if( e ){ |
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D.clearElement(e); |
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}else{ |
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if( !msg.length ) return; |
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e = rowObj.e.err = D.addClass(D.span(), 'error'); |
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rowObj.e.info.append(e); |
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} |
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if( msg.length ){ |
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e.append(...msg); |
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e.classList.remove('hidden'); |
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}else{ |
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e.classList.add('hidden'); |
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} |
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} |
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#addRow(){ |
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const id = ++idCounter; |
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const rowObj = F.nu({ |
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id, file: null, mimeType: '' |
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}); |
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const eRow = D.addClass(D.div(), 'attach-row'); |
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const eDropzone = D.addClass(D.div(), 'attach-dropzone'); |
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const eFile = D.addClass( |
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D.input('file'), 'attach-file-input', 'hidden' |
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); |
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const eInfo = D.addClass(D.span(), 'attach-row-info'); |
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const eFilename = D.append( |
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D.addClass(D.span(), 'attach-filename'), |
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"Select/drop file or click the outer border and tap your "+ |
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"platform's conventional <paste> keyboard shortcut." |
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); |
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const eSize = D.addClass(D.span(), 'attach-size'); |
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eInfo.append(eFilename, eSize); |
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const eDesc = this.#opt.description |
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? D.addClass( |
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D.attr(D.textarea(), 'placeholder', |
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'Optional description...'), |
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'attach-desc' |
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) |
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: undefined; |
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const eRemove = D.addClass( |
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D.button('X', (ev)=>{ |
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ev.stopPropagation(); |
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this.#removeRow(rowObj); |
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}), |
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'attach-row-remove' |
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); |
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eRemove.setAttribute('title', 'Remove this attachment.'); |
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eRemove.type = 'button'; |
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D.append(eDropzone, eInfo, eFile, eRemove); |
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eDropzone.addEventListener('click', ()=>eFile.click()); |
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eFile.addEventListener('change', (ev)=>{ |
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if( ev.target.files.length ){ |
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this.#injestBlob(rowObj, ev.target.files[0]); |
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} |
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}); |
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eDropzone.addEventListener('dragover', (ev)=>{ |
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ev.preventDefault(); |
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eDropzone.classList.add('dragover'); |
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}); |
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eDropzone.addEventListener('dragleave', (ev)=>{ |
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eDropzone.classList.remove('dragover'); |
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}); |
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const handleDrop = (ev, theRealRowObj)=>{ |
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ev.preventDefault(); |
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eDropzone.classList.remove('dragover'); |
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if( ev.dataTransfer.files.length ){ |
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const r = theRealRowObj || rowObj; |
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this.#injestBlob(r, ev.dataTransfer.files[0]); |
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} |
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}; |
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/* Isn't working? eBtnAdd.addEventListener('drop', (ev)=>{ |
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this.#addRow(); |
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handleDrop(ev, this.#rows[this.#rows.length-1]); |
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});*/ |
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eDropzone.addEventListener('drop', handleDrop); |
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const pasteImage = (event, item)=>{ |
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if( item.type.indexOf('image') === 0 ) { |
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event.preventDefault(); |
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const blob = item.getAsFile(); |
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if( blob.name === 'image.png' ){ |
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/* Workaround to attempt to avoid name collisions when pasting |
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multiple images. We cannot, at this level, unambiguously |
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distinguish a ctrl-v of bitmap data vs a ctrl-v of an image |
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file copied via a desktop file manager. */ |
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rowObj.overrideName = `pasted-image-${Date.now()}.png`; |
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} |
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this.#injestBlob(rowObj, blob); |
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return true; |
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} |
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return false; |
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}; |
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eDesc?.addEventListener?.('paste', (e) => { |
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e.stopPropagation(); |
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const items = (e.clipboardData || e.originalEvent.clipboardData)?.items; |
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if( !items ) return; |
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for( let i = 0; i < items.length; ++i ){ |
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const item = items[i]; |
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if( pasteImage(e, item) ){ |
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break; |
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357
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} |
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358
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} |
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359
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}); |
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eRow.addEventListener('paste', (e) => { |
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const items = (e.clipboardData || e.originalEvent.clipboardData)?.items; |
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362
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if( !items ) return; |
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363
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for( let i = 0; i < items.length; ++i ){ |
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364
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const item = items[i]; |
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if( pasteImage(e, item) ){ |
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break; |
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}else if( item.type === 'text/plain' ){ |
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e.preventDefault(); |
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item.getAsString((text) => { |
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rowObj.overrideName = `pasted-text-${Date.now()}.txt`; |
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371
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const blob = new File([text], rowObj.overrideName, |
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{type: 'text/plain'}); |
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this.#injestBlob(rowObj, blob); |
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}); |
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375
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break; |
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376
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}else if(0){ |
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e.preventDefault(); |
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378
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const blob = undefined /* ??? */; |
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379
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this.#injestBlob(rowObj, blob); |
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380
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break; |
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381
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} |
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382
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} |
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383
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}); |
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eRow.append(eDropzone); |
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if( eDesc ) eRow.append(eDesc); |
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rowObj.e = F.nu({ |
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dropzone: eDropzone, |
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info: eInfo, |
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filename: eFilename, |
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size: eSize, |
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desc: eDesc, |
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row: eRow, |
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remove: eRemove |
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394
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}); |
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this.#e.body.append(eRow); |
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this.#rows.push( rowObj ); |
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397
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this.#updateControls(); |
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398
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this.#events.dispatchEvent( |
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399
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new CustomEvent('entry-added',{ |
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400
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detail: F.nu({ |
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401
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type: 'entry-added', |
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402
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row: rowObj, |
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403
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attacher: this |
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404
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}) |
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405
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}) |
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406
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); |
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407
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if( 0 ){ |
|
408
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/* To allow immediate ctrl-v, we need a trick... |
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409
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But don't do this because it will interfere with, e.g., |
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410
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the forum editor. */ |
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411
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D.attr(eRow, 'tabindex', '-1'); |
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412
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eRow.focus(); |
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413
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} |
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414
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} |
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415
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|
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416
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#rowMatchingName(name){ |
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417
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for(let r of this.#rows){ |
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418
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if( r.file?.name===name ) return r; |
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419
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} |
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420
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} |
|
421
|
|
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422
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/** |
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423
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Injects the given File object as the attached content for the |
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424
|
given row. If the object's name collides with another row, |
|
425
|
rowObj is removed from this widget and the old row is instead |
|
426
|
re-populated with the new file. |
|
427
|
|
|
428
|
If rowObj.overrideName is set then the given file gets wrapped |
|
429
|
with that name before attaching it, and that property is |
|
430
|
removed from rowObj. This is intended only for communicating |
|
431
|
auto-generated names for pasted data. |
|
432
|
*/ |
|
433
|
#injestBlob(rowObj, file){ |
|
434
|
if( !file ) return; |
|
435
|
const old = this.#rowMatchingName(file.name); |
|
436
|
if( rowObj.overrideName ){ |
|
437
|
if( rowObj.overrideName !== file.name ){ |
|
438
|
file = new File([file], rowObj.overrideName, {type: file.type}); |
|
439
|
} |
|
440
|
rowObj.overrideName = undefined; |
|
441
|
} |
|
442
|
if( old && rowObj !== old ){ |
|
443
|
/* |
|
444
|
Fossil attachments treat the name as a unique-per-target |
|
445
|
key, with the newest one being the primary. If a name is |
|
446
|
given twice, remove the new entry and reuse the older |
|
447
|
one. There are conceivable, but also unlikely, cases where |
|
448
|
this will have unintended side-effects, e.g. attaching both |
|
449
|
/foo/bar and /baz/bar, but that seems like a lesser evil |
|
450
|
than attaching the same file N times, leading to N |
|
451
|
attachment artifacts. |
|
452
|
*/ |
|
453
|
/* recycle `old` instead to avoid UI flicker. */ |
|
454
|
this.#rowError(old); |
|
455
|
this.#removeRow(rowObj); |
|
456
|
rowObj = old; |
|
457
|
} |
|
458
|
|
|
459
|
let szLbl; |
|
460
|
if( file.size < 500000 ){ |
|
461
|
szLbl = file.size + ' bytes'; |
|
462
|
}else if( file.size < 1000000 ){ |
|
463
|
szLbl = (file.size / 1024).toFixed(2)+' KB'; |
|
464
|
}else{ |
|
465
|
szLbl = (file.size / (1024 * 1024)).toFixed(2)+' MB'; |
|
466
|
} |
|
467
|
this.#rowError(rowObj); |
|
468
|
rowObj.file = file; |
|
469
|
rowObj.mimeType = file.type || 'application/octet-stream'; |
|
470
|
D.clearElement(rowObj.e.filename).append(file.name || 'Pasted Content'); |
|
471
|
D.clearElement(rowObj.e.size).append(szLbl, ' ', rowObj.mimeType || ''); |
|
472
|
rowObj.e.dropzone.classList.add('populated'); |
|
473
|
if( rowObj.e.desc ){ |
|
474
|
rowObj.e.desc.classList.remove('hidden'); |
|
475
|
} |
|
476
|
if( rowObj.e.thumbnail ){ |
|
477
|
rowObj.e.thumbnail.remove(); |
|
478
|
rowObj.e.thumbnail = undefined; |
|
479
|
} |
|
480
|
if( file.type?.startsWith?.('image/') || file.type==='BITMAP' ){ |
|
481
|
/* Add a thumbnail */ |
|
482
|
const img = rowObj.e.thumbnail = D.img(); |
|
483
|
rowObj.e.dropzone.insertBefore(img, rowObj.e.remove); |
|
484
|
img.classList.add('thumbnail'); |
|
485
|
const reader = new FileReader(); |
|
486
|
reader.onload = (e)=>img.setAttribute('src', e.target.result); |
|
487
|
reader.readAsDataURL(file); |
|
488
|
} |
|
489
|
if( file.size>F.config.attachmentSizeLimit ){ |
|
490
|
/* Problem: tapping this link propagates its click event through |
|
491
|
to eDropzone. Thus... */ |
|
492
|
const eLink = D.a(F.repoUrl('help/attachment-size-limit'),'limit'); |
|
493
|
eLink.addEventListener('click', ev=>ev.stopPropagation()); |
|
494
|
this.#rowError(rowObj, "Too large: ", eLink, |
|
495
|
" is ",F.config.attachmentSizeLimit," bytes"); |
|
496
|
rowObj.ok = false; |
|
497
|
}else if( !file.size ){ |
|
498
|
this.#rowError(rowObj, "Cannot attach zero-byte files."); |
|
499
|
rowObj.ok = false; |
|
500
|
}else{ |
|
501
|
rowObj.ok = true; |
|
502
|
} |
|
503
|
this.#events.dispatchEvent( |
|
504
|
new CustomEvent('entry-populated',{ |
|
505
|
detail: F.nu({ |
|
506
|
type: 'entry-populated', |
|
507
|
row: rowObj, |
|
508
|
attacher: this |
|
509
|
}) |
|
510
|
}) |
|
511
|
); |
|
512
|
} |
|
513
|
|
|
514
|
/** |
|
515
|
Returns an array of objects describing the currently-selected |
|
516
|
attachments. |
|
517
|
*/ |
|
518
|
collectState(){ |
|
519
|
const rv = []; |
|
520
|
for(let r of this.#rows){ |
|
521
|
if( !r.e.dropzone?.classList?.contains?.('populated') ){ |
|
522
|
continue; |
|
523
|
} |
|
524
|
rv.push(F.nu({ |
|
525
|
name: r.name || r.file.name, |
|
526
|
content: r.file, |
|
527
|
description: r.e.desc?.value ?? '', |
|
528
|
mimeType: r.mimeType |
|
529
|
})); |
|
530
|
} |
|
531
|
return rv; |
|
532
|
} |
|
533
|
|
|
534
|
/** |
|
535
|
Populates the given FormData object with entries named |
|
536
|
${namePrefix}${N}, each representing a selected file and N |
|
537
|
being a 1-based incremental counter. For entries which have a |
|
538
|
description, it also sets ${namePrefix}${N}_desc. |
|
539
|
*/ |
|
540
|
populateFormData(fd, namePrefix='file'){ |
|
541
|
const st = this.collectState(); |
|
542
|
let i = 0; |
|
543
|
for( ; i < st.length; ++i){ |
|
544
|
const s = st[i]; |
|
545
|
const suffix = i+1; |
|
546
|
fd.append(`${namePrefix}${suffix}`, s.content, s.name); |
|
547
|
const d = s.description?.trim?.(); |
|
548
|
if( d ){ |
|
549
|
fd.append(`${namePrefix}${suffix}_desc`, d); |
|
550
|
} |
|
551
|
} |
|
552
|
return i; |
|
553
|
} |
|
554
|
}/*Attacher*/; |
|
555
|
F.Attacher = Attacher; |
|
556
|
|
|
557
|
F.onPageLoad(function(){ |
|
558
|
const eAttachWrapper = document.querySelector('#attachadd-form-wrapper'); |
|
559
|
if( eAttachWrapper ){ |
|
560
|
/* This page is /attachadd v2 or a workalike. eAttachWrapper holds |
|
561
|
input[type=hidden] fields for use in attaching files and is |
|
562
|
where we inject a file attachment widget. */ |
|
563
|
eAttachWrapper.classList.remove('hidden'); |
|
564
|
const urlArgs = new URLSearchParams(window.location.search); |
|
565
|
let zTarget = urlArgs.get('target'); |
|
566
|
let zTo = urlArgs.get('to') || urlArgs.get('from'); |
|
567
|
const eBtnSubmit = D.button("Submit"); |
|
568
|
eBtnSubmit.type = 'button'; |
|
569
|
const updateBtnSubmit = (attacher)=>{ |
|
570
|
if( attacher.isPopulated ){ |
|
571
|
eBtnSubmit.removeAttribute('disabled'); |
|
572
|
}else{ |
|
573
|
eBtnSubmit.setAttribute('disabled', ''); |
|
574
|
} |
|
575
|
}; |
|
576
|
const cbAttacherChange = (ev)=>{ |
|
577
|
const a = ev.detail.attacher; |
|
578
|
updateBtnSubmit(a); |
|
579
|
}; |
|
580
|
const att = new Attacher({ |
|
581
|
container: eAttachWrapper, |
|
582
|
startWith: 1, |
|
583
|
listener: cbAttacherChange, |
|
584
|
controls: [eBtnSubmit], |
|
585
|
description: true |
|
586
|
}); |
|
587
|
eBtnSubmit.addEventListener('click', async (ev)=>{ |
|
588
|
att.reportError(); |
|
589
|
const li = att.collectState(); |
|
590
|
if( !li.length ) return; |
|
591
|
if( eBtnSubmit.dataset.submitted ) return; |
|
592
|
eBtnSubmit.dataset.submitted = 1; |
|
593
|
D.disable(eBtnSubmit); |
|
594
|
const fd = new FormData(); |
|
595
|
att.populateFormData(fd); |
|
596
|
for( const eIn of eAttachWrapper.querySelectorAll( |
|
597
|
'input[type="hidden"]' |
|
598
|
) ){ |
|
599
|
/* Copy over hidden input fields emitted by the server. */ |
|
600
|
if( eIn.name==='target' ){ |
|
601
|
zTarget = eIn.value; |
|
602
|
}else if( eIn.name==='to' || (eIn.name==='from' && !zTo) ){ |
|
603
|
zTo = eIn.value; |
|
604
|
} |
|
605
|
fd.append(eIn.name, eIn.value) |
|
606
|
} |
|
607
|
if( att.isDryRun ){ |
|
608
|
fd.append('dryrun', '1'); |
|
609
|
} |
|
610
|
let err; |
|
611
|
const resp = await window.fetch(F.repoUrl('attachadd_ajax_post'), { |
|
612
|
method: 'POST', |
|
613
|
body: fd |
|
614
|
}).catch((e)=>{ |
|
615
|
err = e; |
|
616
|
}); |
|
617
|
D.enable(eBtnSubmit); |
|
618
|
delete eBtnSubmit.dataset.submitted; |
|
619
|
const jr = err ? undefined : await resp.json().catch(()=>{}); |
|
620
|
if( err || jr?.error || !resp.ok ){ |
|
621
|
const msg = err ? err.message : (jr?.error || resp.statusText); |
|
622
|
att.reportError("Attaching failed: ", msg); |
|
623
|
}else{ |
|
624
|
att.clear(); |
|
625
|
let to = zTo || jr?.redirect; |
|
626
|
if( to ){ |
|
627
|
if( '/'!==to[0] ){ |
|
628
|
to = F.repoUrl(to); |
|
629
|
} |
|
630
|
window.location = to; |
|
631
|
}else if( zTarget ){ |
|
632
|
window.location = '?target='+zTarget+'&'+Date.now(); |
|
633
|
} |
|
634
|
} |
|
635
|
})/*submit handler*/; |
|
636
|
updateBtnSubmit(att); |
|
637
|
F.page.attacher = att /* only for testing via dev console */; |
|
638
|
}/* /attachadd */ |
|
639
|
})/*onPageLoad()*/; |
|
640
|
|
|
641
|
})(window.fossil); |
|
642
|
|