优化

app/src/main/java/io/legado/app/ui/book/read/page/provider/ChapterProvider.kt

@@ -34,6 +34,7 @@ import io.legado.app.utils.postEvent
 import io.legado.app.utils.spToPx
 import io.legado.app.utils.splitNotBlank
 import io.legado.app.utils.textHeight
+import io.legado.app.utils.toastOnUi
 import kotlinx.coroutines.CoroutineScope
 import splitties.init.appCtx
 import java.util.LinkedList
@@ -1001,28 +1002,40 @@ object ChapterProvider {
             }
         }
 
-        if (viewWidth > 0 && viewHeight > 0) {
-            paddingLeft = ReadBookConfig.paddingLeft.dpToPx()
-            paddingTop = ReadBookConfig.paddingTop.dpToPx()
-            paddingRight = ReadBookConfig.paddingRight.dpToPx()
-            paddingBottom = ReadBookConfig.paddingBottom.dpToPx()
-            visibleWidth = if (doublePage) {
-                viewWidth / 2 - paddingLeft - paddingRight
-            } else {
-                viewWidth - paddingLeft - paddingRight
-            }
-            //留1dp画最后一行下划线
-            visibleHeight = viewHeight - paddingTop - paddingBottom
-            visibleRight = viewWidth - paddingRight
-            visibleBottom = paddingTop + visibleHeight
+        if (viewWidth <= 0 || viewHeight <= 0) {
+            return
         }
 
-        visibleRect.set(
-            paddingLeft.toFloat(),
-            paddingTop.toFloat(),
-            visibleRight.toFloat(),
-            visibleBottom.toFloat()
-        )
+        paddingLeft = ReadBookConfig.paddingLeft.dpToPx()
+        paddingTop = ReadBookConfig.paddingTop.dpToPx()
+        paddingRight = ReadBookConfig.paddingRight.dpToPx()
+        paddingBottom = ReadBookConfig.paddingBottom.dpToPx()
+        visibleWidth = if (doublePage) {
+            viewWidth / 2 - paddingLeft - paddingRight
+        } else {
+            viewWidth - paddingLeft - paddingRight
+        }
+        //留1dp画最后一行下划线
+        visibleHeight = viewHeight - paddingTop - paddingBottom
+        visibleRight = viewWidth - paddingRight
+        visibleBottom = paddingTop + visibleHeight
+
+        if (paddingLeft >= visibleRight || paddingTop >= visibleBottom) {
+            appCtx.toastOnUi("边距设置过大，请重新设置")
+            visibleRect.set(
+                0f,
+                0f,
+                viewWidth.toFloat(),
+                viewHeight.toFloat()
+            )
+        } else {
+            visibleRect.set(
+                paddingLeft.toFloat(),
+                paddingTop.toFloat(),
+                visibleRight.toFloat(),
+                visibleBottom.toFloat()
+            )
+        }
 
     }