# HG changeset patch # User Denis Laxalde # Date 2017-04-06 17:15:09 # Node ID 7160bdd56b84aec14c7e059146f32be91d685dec # Parent 39d36c2db68eb7969c721820e3bd284a338a57f6 hgweb: add a floating tooltip to invite on followlines action In followlines.js, we create a
element to draw attention of users on "followlines" feature. The element shows up on hover of source lines after one second and follows the cursor. After first click (start line selection), the text changes and indicates that next click will terminate selection. diff --git a/mercurial/templates/static/followlines.js b/mercurial/templates/static/followlines.js --- a/mercurial/templates/static/followlines.js +++ b/mercurial/templates/static/followlines.js @@ -17,6 +17,34 @@ document.addEventListener('DOMContentLoa return; } + // tooltip to invite on lines selection + var tooltip = document.createElement('div'); + tooltip.id = 'followlines-tooltip'; + tooltip.classList.add('hidden'); + var initTooltipText = 'click to start following lines history from here'; + tooltip.textContent = initTooltipText; + sourcelines.appendChild(tooltip); + + var tooltipTimeoutID; + //* move the "tooltip" with cursor (top-right) and show it after 1s */ + function moveAndShowTooltip(e) { + if (typeof tooltipTimeoutID !== 'undefined') { + // avoid accumulation of timeout callbacks (blinking) + window.clearTimeout(tooltipTimeoutID); + } + tooltip.classList.add('hidden'); + var x = (e.clientX + 10) + 'px', + y = (e.clientY - 20) + 'px'; + tooltip.style.top = y; + tooltip.style.left = x; + tooltipTimeoutID = window.setTimeout(function() { + tooltip.classList.remove('hidden'); + }, 1000); + } + + // on mousemove, show tooltip close to cursor position + sourcelines.addEventListener('mousemove', moveAndShowTooltip); + // retrieve all direct children of 
     var spans = Array.prototype.filter.call(
         sourcelines.children,
@@ -65,6 +93,10 @@ document.addEventListener('DOMContentLoa
             // registered for other click with  target
             return;
         }
+
+        // update tooltip text
+        tooltip.textContent = 'click again to terminate line block selection here';
+
         var startId = parseInt(startElement.id.slice(1));
         startElement.classList.add(lineSelectedCSSClass); // CSS
 
@@ -83,13 +115,25 @@ document.addEventListener('DOMContentLoa
             // remove this event listener
             sourcelines.removeEventListener('click', lineSelectEnd);
 
+            // hide tooltip and disable motion tracking
+            tooltip.classList.add('hidden');
+            sourcelines.removeEventListener('mousemove', moveAndShowTooltip);
+            window.clearTimeout(tooltipTimeoutID);
+
+            //* restore initial "tooltip" state */
+            function restoreTooltip() {
+                tooltip.textContent = initTooltipText;
+                sourcelines.addEventListener('mousemove', moveAndShowTooltip);
+            }
+
             // compute line range (startId, endId)
             var endId = parseInt(endElement.id.slice(1));
             if (endId == startId) {
                 // clicked twice the same line, cancel and reset initial state
-                // (CSS and event listener for selection start)
+                // (CSS, event listener for selection start, tooltip)
                 removeSelectedCSSClass();
                 sourcelines.addEventListener('click', lineSelectStart);
+                restoreTooltip();
                 return;
             }
             var inviteElement = endElement;
@@ -118,6 +162,8 @@ document.addEventListener('DOMContentLoa
                 sourcelines.removeEventListener('click', cancel);
                 // remove styles on selected lines
                 removeSelectedCSSClass();
+                // restore tooltip element
+                restoreTooltip();
             }
 
             // bind cancel event to click on