MediaWiki:Gadget-SelectionCounter.js：修订间差异

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@@ 第20行： / 第20行： @@
                 .appendTo('body');
         }
+        function ensureVisibleStyles() {
+            var el = $counter[0];
+            if (!el) {
+                return;
+            }
+            var computed = window.getComputedStyle(el);
+            if (computed.position !== 'static') {
+                return;
+            }
+            $counter.css({
+                position: 'fixed',
+                bottom: '24px',
+                right: '24px',
+                padding: '6px 10px',
+                fontSize: '12px',
+                borderRadius: '4px',
+                background: 'var(--color-surface-0, rgba(255, 255, 255, 0.85))',
+                border: '1px solid var(--border-color-base, #aaa)',
+                color: 'var(--color-base, #333)',
+                boxShadow: '0 1px 3px rgba(0, 0, 0, 0.2)',
+                backdropFilter: 'blur(4px)',
+                zIndex: 2147483647,
+                pointerEvents: 'none'
+            });
+        }
+        ensureVisibleStyles();
         var rafId = null;
         var pollTimer = null;
-        var lastText = null;
+        var lastText = '';
+        var lastTime = 0;
+        var isSelecting = false;
         function getSelectionText() {
@@ 第31行： / 第61行： @@
             }
             return selection.toString();
+        }
+        function compactText(text) {
+            return text.replace(/\s+/g, '');
+        }
+        function showCount(text) {
+            var compact = compactText(text);
+            if (!compact) {
+                return false;
+            }
+            var count = Array.from(compact).length;
+            $counter.text('已选 ' + count + ' 字').show();
+            return true;
         }
         function updateCounter() {
             rafId = null;
             var text = getSelectionText();
-            if (!text) {
+            if (text) {
-                if (lastText !== null) {
+                lastText = text;
-                    lastText = null;
+                lastTime = Date.now();
-                    $counter.hide();
+                showCount(text);
-                }
                 return;
             }
-            var compact = text.replace(/\s+/g, '');
+            if (lastText && Date.now() - lastTime < 1200) {
-            if (!compact) {
+                showCount(lastText);
-                if (lastText !== null) {
-                    lastText = null;
-                    $counter.hide();
-                }
                 return;
             }
-            if (text === lastText) {
+            $counter.hide();
-                return;
-            }
-            lastText = text;
-            var count = Array.from(compact).length;
-            $counter.text('已选 ' + count + ' 字').show();
         }
@@ 第89行： / 第121行： @@
         }
+        function onSelectMove() {
-        document.addEventListener('selectionchange', scheduleUpdate);
+            if (!isSelecting) {
-        document.addEventListener('mouseup', scheduleUpdateDelayed, true);
+                return;
-        document.addEventListener('mouseup', scheduleUpdateDelayed);
+            }
+            scheduleUpdate();
+        }
+        document.addEventListener('selectionchange', function () {
+            var text = getSelectionText();
+            if (text) {
+                lastText = text;
+                lastTime = Date.now();
+            }
+            scheduleUpdate();
+        });
+        document.addEventListener('mousedown', function () {
+            isSelecting = true;
+        }, true);
+        document.addEventListener('mouseup', function () {
+            isSelecting = false;
+            scheduleUpdateDelayed();
+        }, true);
+        document.addEventListener('mousemove', onSelectMove, true);
+        document.addEventListener('touchstart', function () {
+            isSelecting = true;
+        }, { passive: true, capture: true });
+        document.addEventListener('touchmove', onSelectMove, { passive: true, capture: true });
+        document.addEventListener('touchend', function () {
+            isSelecting = false;
+            scheduleUpdateDelayed();
+        }, { passive: true, capture: true });
         document.addEventListener('keyup', scheduleUpdate);
-        document.addEventListener('touchend', scheduleUpdateDelayed, { passive: true, capture: true });
-        document.addEventListener('pointerup', scheduleUpdateDelayed, true);
         window.addEventListener('focus', startPolling);
         window.addEventListener('blur', stopPolling);