touchpad_gestures.go RawHistoryFolder

1package webkit
2
3import (
4	"log"
5	"math"
6
7	"github.com/diamondburned/gotk4/pkg/gtk/v4"
8)
9
10// Touchpad swipe velocity threshold (pixels per second)
11// Lower values make gestures more sensitive, higher values require faster swipes
12const (
13	swipeVelocityThreshold = 500.0 // Reasonable threshold for intentional swipes
14)
15
16// AttachTouchpadGestures attaches touchpad swipe gesture handling to the WebView
17// This enables two-finger swipe navigation (left/right for back/forward)
18func (w *WebView) AttachTouchpadGestures() {
19	if w.view == nil {
20		log.Printf("[touchpad-gestures] Cannot attach: WebView is nil")
21		return
22	}
23
24	// Create gesture controller for swipe detection
25	gestureSwipe := gtk.NewGestureSwipe()
26
27	// Set to capture phase to intercept before WebView processes
28	gestureSwipe.SetPropagationPhase(gtk.PhaseCapture)
29
30	// Set to require touchpad (2 fingers minimum for touchpad gestures)
31	// This prevents single-finger drags from triggering navigation
32	gestureSwipe.SetTouchOnly(false) // Allow both touch and touchpad
33
34	// Connect to swipe signal
35	gestureSwipe.ConnectSwipe(func(velocityX, velocityY float64) {
36		// Only process horizontal swipes (ignore mostly vertical swipes)
37		// Use absolute values to compare magnitudes
38		absVelocityX := math.Abs(velocityX)
39		absVelocityY := math.Abs(velocityY)
40
41		// Require horizontal velocity to be dominant
42		if absVelocityY > absVelocityX {
43			log.Printf("[touchpad-gestures] Swipe is more vertical (X:%.1f Y:%.1f), ignoring", velocityX, velocityY)
44			return
45		}
46
47		// Check if swipe velocity meets threshold
48		if absVelocityX < swipeVelocityThreshold {
49			log.Printf("[touchpad-gestures] Swipe velocity too low (%.1f < %.1f), ignoring", absVelocityX, swipeVelocityThreshold)
50			return
51		}
52
53		// Determine swipe direction and navigate
54		if velocityX > 0 {
55			// Swipe right (positive velocity) - go back
56			if w.view.CanGoBack() {
57				log.Printf("[touchpad-gestures] Swipe right detected (velocity: %.1f) - navigating backward", velocityX)
58				w.view.GoBack()
59			} else {
60				log.Printf("[touchpad-gestures] Swipe right detected but cannot go back")
61			}
62		} else {
63			// Swipe left (negative velocity) - go forward
64			if w.view.CanGoForward() {
65				log.Printf("[touchpad-gestures] Swipe left detected (velocity: %.1f) - navigating forward", velocityX)
66				w.view.GoForward()
67			} else {
68				log.Printf("[touchpad-gestures] Swipe left detected but cannot go forward")
69			}
70		}
71	})
72
73	// Attach controller to WebView
74	w.view.AddController(gestureSwipe)
75	log.Printf("[touchpad-gestures] Touchpad gesture controller attached to WebView ID %d", w.id)
76}