make scroll snapping optional

fixes #7

README.md

@@ -98,6 +98,11 @@ Please consider opening an issue or PR if you think a certain action warrants a
 ```jsonc
 // VSCode settings.json
 {
+    "git-log--graph.disable-scroll-snapping": {
+        "description": "If active, the mouse wheel event on the scroller will not be caught and instead behave normally. This comes at the expense of the dotted connection lines at the top being offset wrongly more often.",
+        "type": "boolean",
+        "default": false
+    },
     "git-log--graph.branch-width": {
         "description": "The width of the individual branch lines, including both line and right spacing. The default 'auto' chooses between 10 and 2 depending on the size of the repository.",
         "type": [

package.json

@@ -427,6 +427,11 @@
 						"string"
 					],
 					"default": "auto"
+				},
+				"git-log--graph.disable-scroll-snapping": {
+					"description": "If active, the mouse wheel event on the scroller will not be caught and instead behave normally. This comes at the expense of the dotted connection lines at the top being offset wrongly more often.",
+					"type": "boolean",
+					"default": false
 				}
 			}
 		}

web/src/views/MainView.coffee

@@ -159,9 +159,13 @@ export default
 			scroll_item_offset = start_index + 2
 			visible_commits.value = filtered_commits.value.slice(scroll_item_offset, end_index)
 		scroller_on_wheel = (###* @type WheelEvent ### event) =>
+			if not store.config_scroll_snapping_active.value
+				return
 			event.preventDefault()
 			commits_scroller_ref.value?.scrollToItem scroll_item_offset + Math.round(event.deltaY / 20)
 		scroller_on_keydown = (###* @type KeyboardEvent ### event) =>
+			if not store.config_scroll_snapping_active.value
+				return
 			if event.key == 'ArrowDown'
 				event.preventDefault()
 				commits_scroller_ref.value?.scrollToItem scroll_item_offset + 1

web/src/views/store.coffee

@@ -119,6 +119,9 @@ export selected_git_action = ref null
 ``###* @type {Ref<number|string>} ###
 export config_width = ref ''
 
+``###* @type {Ref<boolean>} ###
+export config_scroll_snapping_active = ref false
+
 ###* @type {Ref<string[]>} ###
 export folder_names = ref []
 
@@ -136,6 +139,8 @@ export refresh_config = =>
 
 	config_width.value = await get_config 'branch-width'
 
+	config_scroll_snapping_active.value = ! (await get_config 'disable-scroll-snapping')
+
 export vis_v_width = computed =>
 	if not config_width.value or not Number(config_width.value)
 		Math.max(2, Math.min(10, Math.round(vis_max_length.value * (-1) * 8 / 50 + 18)))