Opt the image editing dialog box, add full-screen zoom function, improve the panning limit to ensure the security of image transformation.

manager/app/src/main/java/com/sukisu/ultra/ui/component/ImageEditorDialog.kt

@@ -1,6 +1,7 @@
 package com.sukisu.ultra.ui.component
 
 import android.net.Uri
+import androidx.compose.animation.core.animateFloatAsState
 import androidx.compose.foundation.background
 import androidx.compose.foundation.gestures.detectTransformGestures
 import androidx.compose.foundation.layout.*
@@ -8,6 +9,7 @@ import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Check
 import androidx.compose.material.icons.filled.Close
+import androidx.compose.material.icons.filled.Fullscreen
 import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
@@ -18,6 +20,7 @@ import androidx.compose.ui.graphics.graphicsLayer
 import androidx.compose.ui.input.pointer.pointerInput
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.window.Dialog
@@ -27,6 +30,12 @@ import coil.request.ImageRequest
 import com.sukisu.ultra.R
 import com.sukisu.ultra.ui.util.BackgroundTransformation
 import com.sukisu.ultra.ui.util.saveTransformedBackground
+import kotlinx.coroutines.launch
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.ui.geometry.Size
+import androidx.compose.ui.layout.onSizeChanged
+import kotlin.math.max
 
 @Composable
 fun ImageEditorDialog(
@@ -38,6 +47,48 @@ fun ImageEditorDialog(
     var offsetX by remember { mutableFloatStateOf(0f) }
     var offsetY by remember { mutableFloatStateOf(0f) }
     val context = LocalContext.current
+    val scope = rememberCoroutineScope()
+    val density = LocalDensity.current
+    var lastScale by remember { mutableFloatStateOf(1f) }
+    var lastOffsetX by remember { mutableFloatStateOf(0f) }
+    var lastOffsetY by remember { mutableFloatStateOf(0f) }
+    var imageSize by remember { mutableStateOf(Size.Zero) }
+    var screenSize by remember { mutableStateOf(Size.Zero) }
+    val animatedScale by animateFloatAsState(
+        targetValue = scale,
+        label = "ScaleAnimation"
+    )
+    val animatedOffsetX by animateFloatAsState(
+        targetValue = offsetX,
+        label = "OffsetXAnimation"
+    )
+    val animatedOffsetY by animateFloatAsState(
+        targetValue = offsetY,
+        label = "OffsetYAnimation"
+    )
+    val updateTransformation = remember {
+        { newScale: Float, newOffsetX: Float, newOffsetY: Float ->
+            val scaleDiff = kotlin.math.abs(newScale - lastScale)
+            val offsetXDiff = kotlin.math.abs(newOffsetX - lastOffsetX)
+            val offsetYDiff = kotlin.math.abs(newOffsetY - lastOffsetY)
+            if (scaleDiff > 0.01f || offsetXDiff > 1f || offsetYDiff > 1f) {
+                scale = newScale
+                offsetX = newOffsetX
+                offsetY = newOffsetY
+                lastScale = newScale
+                lastOffsetX = newOffsetX
+                lastOffsetY = newOffsetY
+            }
+        }
+    }
+    val scaleToFullScreen = remember {
+        {
+            if (imageSize.height > 0 && screenSize.height > 0) {
+                val newScale = screenSize.height / imageSize.height
+                updateTransformation(newScale, 0f, 0f)
+            }
+        }
+    }
 
     Dialog(
         onDismissRequest = onDismiss,
@@ -51,8 +102,10 @@ fun ImageEditorDialog(
             modifier = Modifier
                 .fillMaxSize()
                 .background(Color.Black.copy(alpha = 0.9f))
+                .onSizeChanged { size ->
+                    screenSize = Size(size.width.toFloat(), size.height.toFloat())
+                }
         ) {
-            // 主图片区域
             AsyncImage(
                 model = ImageRequest.Builder(LocalContext.current)
                     .data(imageUri)
@@ -63,24 +116,39 @@ fun ImageEditorDialog(
                 modifier = Modifier
                     .fillMaxSize()
                     .graphicsLayer(
-                        scaleX = scale,
+                        scaleX = animatedScale,
-                        scaleY = scale,
+                        scaleY = animatedScale,
-                        translationX = offsetX,
+                        translationX = animatedOffsetX,
-                        translationY = offsetY
+                        translationY = animatedOffsetY
                     )
                     .pointerInput(Unit) {
                         detectTransformGestures { _, pan, zoom, _ ->
-                            scale = (scale * zoom).coerceIn(0.5f, 3f)
+                            scope.launch {
-
+                                try {
-                            // 限制平移范围，防止图片完全移出屏幕
+                                    val newScale = (scale * zoom).coerceIn(0.5f, 3f)
-                            val maxOffset = size.width * (scale - 1) / 2
+                                    val maxOffsetX = max(0f, size.width * (newScale - 1) / 2)
-                            offsetX = (offsetX + pan.x).coerceIn(-maxOffset, maxOffset)
+                                    val maxOffsetY = max(0f, size.height * (newScale - 1) / 2)
-                            offsetY = (offsetY + pan.y).coerceIn(-maxOffset, maxOffset)
+                                    val newOffsetX = if (maxOffsetX > 0) {
+                                        (offsetX + pan.x).coerceIn(-maxOffsetX, maxOffsetX)
+                                    } else {
+                                        0f
+                                    }
+                                    val newOffsetY = if (maxOffsetY > 0) {
+                                        (offsetY + pan.y).coerceIn(-maxOffsetY, maxOffsetY)
+                                    } else {
+                                        0f
+                                    }
+                                    updateTransformation(newScale, newOffsetX, newOffsetY)
+                                } catch (e: Exception) {
+                                    updateTransformation(lastScale, lastOffsetX, lastOffsetY)
+                                }
+                            }
                         }
                     }
+                    .onSizeChanged { size ->
+                        imageSize = Size(size.width.toFloat(), size.height.toFloat())
+                    }
             )
-
-            // 顶部工具栏
             Row(
                 modifier = Modifier
                     .fillMaxWidth()
@@ -100,12 +168,29 @@ fun ImageEditorDialog(
                         tint = Color.White
                     )
                 }
-
+                IconButton(
+                    onClick = { scaleToFullScreen() },
+                    modifier = Modifier
+                        .clip(RoundedCornerShape(8.dp))
+                        .background(Color.Black.copy(alpha = 0.6f))
+                ) {
+                    Icon(
+                        imageVector = Icons.Default.Fullscreen,
+                        contentDescription = stringResource(R.string.reprovision),
+                        tint = Color.White
+                    )
+                }
                 IconButton(
                     onClick = {
-                        val transformation = BackgroundTransformation(scale, offsetX, offsetY)
+                        scope.launch {
-                        val savedUri = context.saveTransformedBackground(imageUri, transformation)
+                            try {
-                        savedUri?.let { onConfirm(it) }
+                                val transformation = BackgroundTransformation(scale, offsetX, offsetY)
+                                val savedUri = context.saveTransformedBackground(imageUri, transformation)
+                                savedUri?.let { onConfirm(it) }
+                            } catch (e: Exception) {
+                                ""
+                            }
+                        }
                     },
                     modifier = Modifier
                         .clip(RoundedCornerShape(8.dp))
@@ -119,7 +204,6 @@ fun ImageEditorDialog(
                 }
             }
 
-            // 底部提示
             Box(
                 modifier = Modifier
                     .fillMaxWidth()

manager/app/src/main/java/com/sukisu/ultra/ui/util/BackgroundUtils.kt

@@ -59,17 +59,33 @@ fun Context.applyTransformationToBitmap(bitmap: Bitmap, transformation: Backgrou
 
     val matrix = Matrix()
 
-    matrix.postScale(transformation.scale, transformation.scale)
+    // 确保缩放值有效
+    val safeScale = maxOf(0.1f, transformation.scale)
+    matrix.postScale(safeScale, safeScale)
 
     // 计算中心点
     val centerX = targetWidth / 2f
     val centerY = targetHeight / 2f
 
-    // 缩放围绕中心点
+    // 计算偏移量，确保不会出现负最大值的问题
-    matrix.postTranslate(
+    val widthDiff = (bitmap.width * safeScale - targetWidth)
-        -((bitmap.width * transformation.scale - targetWidth) / 2) + transformation.offsetX,
+    val heightDiff = (bitmap.height * safeScale - targetHeight)
-        -((bitmap.height * transformation.scale - targetHeight) / 2) + transformation.offsetY
+
-    )
+    // 安全计算偏移量边界
+    val maxOffsetX = maxOf(0f, widthDiff / 2)
+    val maxOffsetY = maxOf(0f, heightDiff / 2)
+
+    // 限制偏移范围
+    val safeOffsetX = if (maxOffsetX > 0)
+        transformation.offsetX.coerceIn(-maxOffsetX, maxOffsetX) else 0f
+    val safeOffsetY = if (maxOffsetY > 0)
+        transformation.offsetY.coerceIn(-maxOffsetY, maxOffsetY) else 0f
+
+    // 应用偏移量到矩阵
+    val translationX = -widthDiff / 2 + safeOffsetX
+    val translationY = -heightDiff / 2 + safeOffsetY
+
+    matrix.postTranslate(translationX, translationY)
 
     // 将原始位图绘制到新位图上
     canvas.drawBitmap(bitmap, matrix, null)
@@ -92,7 +108,7 @@ fun Context.saveTransformedBackground(uri: Uri, transformation: BackgroundTransf
 
         return Uri.fromFile(file)
     } catch (e: Exception) {
-        Log.e("BackgroundUtils", "Failed to save transformed image: ${e.message}")
+        Log.e("BackgroundUtils", "Failed to save transformed image: ${e.message}", e)
         return null
     }
 }

manager/app/src/main/res/values-zh-rCN/strings.xml

@@ -265,4 +265,5 @@
     <string name="image_editor_title">调整背景图片</string>
     <string name="image_editor_hint">使用双指缩放图片，单指拖动调整位置</string>
     <string name="background_image_error">无法加载图片</string>
+    <string name="reprovision">重置</string>
 </resources>

manager/app/src/main/res/values/strings.xml

@@ -269,4 +269,5 @@
     <string name="image_editor_title">Adjust background image</string>
     <string name="image_editor_hint">Use two fingers to zoom the image, and one finger to drag it to adjust the position</string>
     <string name="background_image_error">Could not load image</string>
+    <string name="reprovision">Reprovision</string>
 </resources>