reworking text selection + tweaks...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>

experiments/outline-editor/editor.css

@@ -183,6 +183,7 @@
 			&>.view {
 				position: relative;
 				pointer-events: none;
+				user-select: none;
 
 				/* clickable things in view */
 				& a,

experiments/outline-editor/editor.js

@@ -66,6 +66,12 @@ var getCharOffset = function(elem, x, y, c){
 		: null }
 
 
+var getTextAreaOffset = function(elem, x, y){
+	return elem.getTextGeometry(function(res, elem){
+		// XXX this will not work as it needs correct placement of elem under the cursor...
+		return getCharOffset(elem, x, y) }) }
+
+
 // Get offset in markdown relative to the resulting text...
 //                     
 //					    v <----- position
@@ -2017,24 +2023,50 @@ var Outline = {
 		// click...
 		// XXX revise...
 		// XXX tap support...
+		// XXX support selection from first click... (see: mousemove handler)
+		var selecting, start
 		outline.addEventListener('mousedown', 
 			function(evt){
 				var elem = evt.target
 				// place the cursor where the user clicked in code/text...
 				if(elem.classList.contains('code') 
 						&& document.activeElement !== elem){
-					evt.preventDefault()
 					var view = that.get(elem).querySelector('.view')
+					var initial = elem.selectionStart
 					var c = getCharOffset(view, evt.clientX, evt.clientY)
-					if(c == null){
+					var m = getMarkdownOffset(elem.value, view.innerText, c)
+					// selecting an element with text offset by markup...
+					if(m != 0){
+						evt.preventDefault()
+						selecting = elem }
+					start = c == null ?
+						elem.value.length
+						: c + m
+					// NOTE: this is done on next frame to allow the 
+					// 		browser to place the caret before we correct 
+					// 		its position... (if .preventDefault() was not called)
+					setTimeout(function(){
 						elem.focus()
-						elem.selectionStart = elem.value.length
-						elem.selectionEnd = elem.value.length 
+						elem.selectionStart = 
+							elem.selectionEnd = 
+								start }, 0) } })
+		outline.addEventListener('mousemove', 
+			function(evt){
+				// handle selection in element with text offset by markup...
+				// XXX should there be a timeout???
+				if(selecting != null){
+					// XXX need to get offset under cursor...
+					var c = getTextAreaOffset(selecting, evt.clientX, evt.clientY)
+					return
+					if(c > start){
+						selecting.selectionStart = start
+						selecting.selectionEnd = c
 					} else {
-						var m = getMarkdownOffset(elem.value, view.innerText, c)
-						elem.focus()
-						elem.selectionStart = c + m
-						elem.selectionEnd = c + m } } })
+						selecting.selectionStart = c
+						selecting.selectionEnd = start } } })
+		outline.addEventListener('mouseup', 
+			function(evt){
+				selecting = undefined })
 		outline.addEventListener('click', 
 			function(evt){
 				var elem = evt.target

experiments/outline-editor/generic.js

@@ -63,7 +63,7 @@ HTMLTextAreaElement.prototype.autoUpdateSize = function(){
 		function(evt){
 			that.updateSize() }) 
 	return this }
-HTMLTextAreaElement.prototype.getTextGeometry = function(){
+HTMLTextAreaElement.prototype.getTextGeometry = function(func){
 	var offset = this.selectionStart
 	var text = this.value
 
@@ -128,6 +128,9 @@ HTMLTextAreaElement.prototype.getTextGeometry = function(){
 		offsetTop: carret.offsetTop,
 	}
 
+	if(typeof(func) == 'function'){
+		res = func(res, span) }
+
 	span.remove()
 
 	return res }

experiments/outline-editor/index.html

@@ -75,6 +75,7 @@ var setup = function(){
   - selection
     - DONE multiple node selection (via shift+motion)
       - fixed state -- while `shift` pressed select or deselect only depending on first action (a-la FAR)
+    - DONE double/triple click working...
     - touch/mouse (???)
   - Q: should we select text (mouse/touch) without first focusing??
     - _...logseq does not do this either_
@@ -83,10 +84,8 @@ var setup = function(){
   - numbered lists: add counters to a depth of 6-7...
     - _or find a way to make them repeat..._
   - FEATURE: read-only mode
-  - auto-shift done blocks to the end of siblings... (option?)
+  - FEATURE: auto-shift done blocks to the end of siblings... (option?)
     - ...or should this be `sort:: done` -- i.e. sort children by done status??
-  - `backspace`/`delete` in block contract the field with a delay...
-    - _...looks like we are updating size on keyup..._
   - codeblock as a block
     _...if only whitespace before/after clear it and style whole block..._
     _...might be a good idea to do this with codeblock at start/end of block..._
@@ -100,15 +99,21 @@ var setup = function(){
     - cleanup html
     - generate ideomatic html (???)
   - style attrs (see: [attrs](#attributes))
-  - FEATURE: `collapse-children:: true` block option -- when loading collapse all immediate children
   - FF: figure out a way to draw expand/collapse bullets without the use of CSS' `:has(..)`
   - table inline editing a-la code editing -- click cell and edit directly...
-  - a way to make a block monospace (???)
-  - Nerd fonts (option???)
   - smooth scrolling
     - _...this is more complicated than adding `behavior: "smooth"` to `.scrollIntoView(..)` as scrolling animation will get interrupted by next user input..._
     - need to cancel animation if things are moving too fast...
     - make this generic (???)
+  - JSON API
+  - cli
+  - Q: do we use \\t for indent? (option???)
+  - Q: persistent empty first/last node (a button to create a new node)?
+  - Q: search?
+    - _seems that search should be external to the editor_
+  - empty item height is a bit off...
+  - Nerd fonts (option???)
+  - FEATURE: `collapse-children:: true` block option -- when loading collapse all immediate children
   - FEATURE? block templates...
     collapsed:: true
     - something like: `TPL: [_] <editable/> -- <editable/>`
@@ -116,24 +121,24 @@ var setup = function(){
       - `<editable/>` -- field marker
       - each child node will copy the template and allow editing of only fields
       - not clear how to handle template changes...
-  - JSON API
-  - cli
-  - Q: do we use \\t for indent? (option???)
-  - Q: persistent empty first/last node (a button to create a new node)?
-  - Q: should list bullets be on the same level as nodes or offset??
+  - DONE `backspace`/`delete` in block contract the field with a delay...
+    collapsed:: true
+    - _...looks like we are updating size on keyup..._
+  - DONE Q: should list bullets be on the same level as nodes or offset??
     collapsed:: true
     - A) justified to bullet:
-         * list item
-         * list item
-         block text
+      ```
+      * list item
+      * list item
+      block text
+      ```
+      _This is impossible to create in the current implementation_
     - B) justified to text _(current)_:
-         * list item
-         * list item
-           block text
-    - NOTE: this is only a problem if making list-items manually -- disable???
-  - empty item height is a bit off...
-  - search?
-    - _...not sure if search should be internal or external yet..._
+      ```
+      * list item
+      * list item
+        block text
+      ```
   - DONE add horizontal scroll to code blocks...
     collapsed:: true
     - ```html
@@ -168,6 +173,7 @@ var setup = function(){
   - DONE undo 
   - DONE crop: make path clickable
   - DONE Q: crop: should we control crop via "crop-in"/"crop-out" instead of crop/uncrop??
+    collapsed:: true
     - _crop-in/crop-out seems more natural..._
   - DONE crop: show crop path (and depth)
   - DONE over-travel pause -- when going fast over start/end stop...