dblclick for new note; immediately-cancellable notes

nginx/public_html/App.js

@@ -1,5 +1,6 @@
 import Note from './Note.js';
 import {
+  preventDblClickSelection,
     new_note_handler, 
     new_note_by_dblclick_handler, 
     search_term_change_handler, 
@@ -67,7 +68,7 @@ function App(vnode_init){
             ])
           ]),
         m('.main', {key: 'main'}, [
-          m('.notes', {ondblclick: o(new_note_by_dblclick_handler)}, s.notes.map(note_state =>
+          m('.notes', {ondblclick: o(new_note_by_dblclick_handler), onmousedown:preventDblClickSelection}, s.notes.map(note_state =>
             m(Note, {state:s, note_state, dispatch, key: note_state.note_id})
             ))
           ])

nginx/public_html/Note.js

@@ -11,7 +11,7 @@ function Note(vnode_init){
         return m('.note', [
           m('textarea', {key: 'textarea', onchange: text_change_handler.bind(null, note_state, dispatch), oncreate: is_focused?({dom})=>{ dom.focus(); delete note_state.is_focused; }:null }, note_state.temp_text),
           m('.buttons', {key: 'editing-buttons'}, [
-            m('button', {key: 'cancel-button', onclick: cancel_handler.bind(null, note_state, dispatch) }, 'Cancel'),
+            m('button', {key: 'cancel-button', onclick: cancel_handler.bind(null, state, note_state, dispatch) }, 'Cancel'),
             m('button', {key: 'save-button', onclick: save_handler.bind(null, note_state, dispatch) }, 'Save')
             ])
           ]);

nginx/public_html/handlers/App.js

@@ -1,6 +1,12 @@
 import nanoid from '../nanoid.min.js';
 import api from '../api.js';
 
+const preventDblClickSelection = function(e){
+  // as per [https://stackoverflow.com/a/43321596]
+  if(e.detail>1){
+    e.preventDefault();
+    }
+  }
 const load_notes = function(state, dispatch){
   api.post('/load-notes', {bin_id: state.bin_id})
     .then(res=>{
@@ -88,7 +94,8 @@ const choose_bin_handler = function(state, dispatch, bin_id){
       });
   };
 
-export {new_note_handler, 
+export {preventDblClickSelection,
+  new_note_handler, 
   new_note_by_dblclick_handler,
   search_term_change_handler, 
   sorting_change_handler, 

nginx/public_html/handlers/Note.js

@@ -3,8 +3,14 @@ import api from '../api.js';
 const edit_handler = function(note_state, dispatch){
   dispatch('update-note-editing', {id: note_state.note_id, is_editing: true});
   };
-const cancel_handler = function(note_state, dispatch){
+const cancel_handler = function(state, note_state, dispatch){
+  // TODO: this `if` may cause glitches; keep in mind
+  if(note_state.is_new===true){
+    dispatch('immediately-cancel-note', note_state.note_id);
+    }
+  else{
     dispatch('update-note-editing', {id: note_state.note_id, is_editing: false});
+    }
   };
 const text_change_handler = function(note_state, dispatch, e){
   note_state.temp_text = e.target.value;

nginx/public_html/index.js

@@ -78,6 +78,11 @@ const refAll = function(s, o, key, new_model_ids){
     This routine would need to be called for state.notes, which contains refs of the form: `state.notes[n].note_id`
  */
 
+// TODO: doesn't update anything that references the deleted record; results in dangling pointers:
+const disintegrate = function(s, id){
+  delete s.db[id];
+  };
+
 function addToBinListIfLoggedIn(state){
   const s = state;
   // if user is logged in:
@@ -98,9 +103,10 @@ const reducer = handleActions({
     'bin-loaded': (s, bin) => {  i(s,bin); ref(s,s,'bin_id',bin.id); s.temp_bin_name=bin.name;  },
     'update-search-term': (s, search_term) => {  s.search_term=search_term;  },
     'update-search-results': (s, _notes) => {  integrateAll(s,s.notes,'note_id',_notes); s.notes =_notes.map(n=>({is_editing: false, temp_text: '', bin_id: s.bin_id, note_id:n.id}));  },
-    'add-note': (s, {id, date}) => {  i(s, {id: id, text: '', modified: date}); s.notes.unshift({is_editing: true, temp_text: '', bin_id: s.bin_id, is_focused:true, note_id: id});  },
+    'add-note': (s, {id, date}) => {  i(s, {id: id, text: '', modified: date}); s.notes.unshift({is_editing: true, temp_text: '', bin_id: s.bin_id, is_focused:true, is_new: true, note_id: id});  },
     'notes-loaded': (s, _notes) => {  integrateAll(s,_notes); s.notes = _notes.map(n=>({is_editing: false, temp_text: n.text, bin_id: s.bin_id, note_id:n.id}));  },
-    'update-note-text': (s, {id, text}) => {  const note_s=s.notes.find(n=>n.note_id===id); s.db[note_s.note_id].model.text=text;  }, // updates underlying note text (i.e. the "model", not the app note_state) "in the background" (e.g. from a server-pushed update), regardless of whether it's being edited; "save" is a separate action, below
+    'immediately-cancel-note': (s, note_id) => { disintegrate(s,note_id); s.notes.splice(s.notes.findIndex(n=>n.note_id===note_id), 1); },
+    'update-note-text': (s, {id, text}) => {  const note_s=s.notes.find(n=>n.note_id===id); note_s.is_new=false; s.db[note_s.note_id].model.text=text;  }, // updates underlying note text (i.e. the "model", not the app note_state) "in the background" (e.g. from a server-pushed update), regardless of whether it's being edited; "save" is a separate action, below
     'update-note-editing': (s, {id, is_editing}) => {  const note_s=s.notes.find(n=>n.note_id===id); note_s.is_editing=is_editing; note_s.temp_text=s.db[note_s.note_id].model.text;  },
     'save-note-edit': (s, {id, text}) => {  const note_s=s.notes.find(n=>n.note_id===id); s.db[note_s.note_id].model.text=text; note_s.temp_text=text; note_s.is_editing=false;  },
     'update-sorting': (s, sorting) => {  s.sorting=sorting;  },