Make DefaultCursorThickness an expect val and draw cursor without b…

…lurring.

This is needed to allow a different cursor thickness on the desktop. See #103

RelNote: "We are ever slightly changing the way cursor is drawn. You can use LocalCursorBlinkEnabled to disable the cursor drawing in tests."

Test: No additional tests needed; TextFieldCursorTest is passing.

Change-Id: I4c6979903bec329287ec25093f55b83668d674ea

compose/foundation/foundation/src/androidMain/kotlin/androidx/compose/foundation/text/TextFieldCursor.android.kt

@@ -1,6 +1,22 @@
+/*
+ * Copyright 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package androidx.compose.foundation.text
 
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
 
-internal actual val DefaultCursorThickness: Dp = 2.dp
+internal actual val DefaultCursorThickness: Dp = 2.dp

compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/text/TextFieldCursor.kt

@@ -80,7 +80,7 @@ internal fun Modifier.cursor(
                                     // When cursor width is odd, draw it in the middle of a pixel,
                                     // to avoid blurring due to antialiasing.
                                     if (cursorWidth.toInt() % 2 == 1) {
-                                        floor(it) + 0.5f  // round to nearest n+0.5
+                                        floor(it) + 0.5f // round to nearest n+0.5
                                     } else round(it)
                                 }
 

compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/text/input/internal/selection/TextFieldSelectionState.kt

@@ -323,7 +323,7 @@ internal class TextFieldSelectionState(
                     // When cursor width is odd, draw it in the middle of a pixel,
                     // to avoid blurring due to antialiasing.
                     if (cursorWidth.toInt() % 2 == 1) {
-                        floor(it) + 0.5f  // round to nearest n+0.5
+                        floor(it) + 0.5f // round to nearest n+0.5
                     } else round(it)
                 }