perf: save windows position and restore for next launch #101

backend/services/preferences_service.go

@@ -1,8 +1,10 @@
 package services
 
 import (
+	"context"
 	"encoding/json"
 	"github.com/adrg/sysfont"
+	runtime2 "github.com/wailsapp/wails/v2/pkg/runtime"
 	"net/http"
 	"sort"
 	"strings"
@@ -139,6 +141,38 @@ func (p *preferencesService) GetWindowSize() (width, height int, maximised bool)
 	return
 }
 
+func (p *preferencesService) GetWindowPosition(ctx context.Context) (x, y int) {
+	data := p.pref.GetPreferences()
+	x, y = data.Behavior.WindowPosX, data.Behavior.WindowPosY
+	width, height := data.Behavior.WindowWidth, data.Behavior.WindowHeight
+	var screenWidth, screenHeight int
+	if screens, err := runtime2.ScreenGetAll(ctx); err == nil {
+		for _, screen := range screens {
+			if screen.IsCurrent {
+				screenWidth, screenHeight = screen.Size.Width, screen.Size.Height
+				break
+			}
+		}
+	}
+	if screenWidth <= 0 || screenHeight <= 0 {
+		screenWidth, screenHeight = consts.DEFAULT_WINDOW_WIDTH, consts.DEFAULT_WINDOW_HEIGHT
+	}
+	if x <= 0 || x+width > screenWidth || y <= 0 || y+height > screenHeight {
+		// out of screen, reset to center
+		x, y = (screenWidth-width)/2, (screenHeight-height)/2
+	}
+	return
+}
+
+func (p *preferencesService) SaveWindowPosition(x, y int) {
+	if x > 0 || y > 0 {
+		p.UpdatePreferences(map[string]any{
+			"behavior.windowPosX": x,
+			"behavior.windowPosY": y,
+		})
+	}
+}
+
 func (p *preferencesService) GetScanSize() int {
 	data := p.pref.GetPreferences()
 	size := data.General.ScanSize

backend/services/system_service.go

@@ -63,7 +63,7 @@ func (s *systemService) SelectFile(title string) (resp types.JSResp) {
 
 func (s *systemService) loopWindowEvent() {
 	var fullscreen, maximised, minimised, normal bool
-	var width, height int
+	var width, height, posx, posy int
 	var dirty bool
 	for {
 		time.Sleep(300 * time.Millisecond)
@@ -84,6 +84,12 @@ func (s *systemService) loopWindowEvent() {
 			dirty = true
 		}
 
+		if x, y := runtime.WindowGetPosition(s.ctx); x != posx || y != posy {
+			// window position changed
+			posx, posy = x, y
+			dirty = true
+		}
+
 		if m := runtime.WindowIsMaximised(s.ctx); m != maximised {
 			maximised = m
 			dirty = true
@@ -110,8 +116,9 @@ func (s *systemService) loopWindowEvent() {
 			})
 
 			if !fullscreen && !minimised {
-				// save window size
+				// save window size and position
 				Preferences().SaveWindowSize(width, height, maximised)
+				Preferences().SaveWindowPosition(posx, posy)
 			}
 		}
 	}

backend/types/preferences.go

@@ -36,6 +36,8 @@ type PreferencesBehavior struct {
 	WindowWidth     int  `json:"windowWidth" yaml:"window_width"`
 	WindowHeight    int  `json:"windowHeight" yaml:"window_height"`
 	WindowMaximised bool `json:"windowMaximised" yaml:"window_maximised"`
+	WindowPosX      int  `json:"windowPosX" yaml:"window_pos_x"`
+	WindowPosY      int  `json:"windowPosY" yaml:"window_pos_y"`
 }
 
 type PreferencesGeneral struct {

main.go

@@ -74,6 +74,8 @@ func main() {
 		},
 		OnDomReady: func(ctx context.Context) {
 			runtime2.WindowShow(ctx)
+			x, y := prefSvc.GetWindowPosition(ctx)
+			runtime2.WindowSetPosition(ctx, x, y)
 		},
 		OnShutdown: func(ctx context.Context) {
 			browserSvc.Stop()