| Siyamed Sinir | 8fe71b0 | 2022-01-15 15:21:34 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2022 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package androidx.compose.ui.text.input |
| 18 | |
| Siyamed Sinir | 01e9778 | 2022-01-16 07:48:22 -0800 | [diff] [blame] | 19 | import android.graphics.Matrix |
| Siyamed Sinir | 8fe71b0 | 2022-01-15 15:21:34 -0800 | [diff] [blame] | 20 | import android.view.inputmethod.CursorAnchorInfo |
| Siyamed Sinir | 01e9778 | 2022-01-16 07:48:22 -0800 | [diff] [blame] | 21 | import androidx.compose.ui.text.TextLayoutResult |
| 22 | import androidx.compose.ui.text.style.ResolvedTextDirection |
| Siyamed Sinir | 8fe71b0 | 2022-01-15 15:21:34 -0800 | [diff] [blame] | 23 | |
| 24 | /** |
| 25 | * Helper function to build [CursorAnchorInfo](https://developer.android.com/reference/android/view/inputmethod/CursorAnchorInfo). |
| 26 | * |
| 27 | * @param textFieldValue required to set text, composition and selection information into the |
| 28 | * CursorAnchorInfo. |
| Siyamed Sinir | 01e9778 | 2022-01-16 07:48:22 -0800 | [diff] [blame] | 29 | * @param textLayoutResult TextLayoutResult for the [textFieldValue] used to enter cursor and |
| 30 | * character information |
| 31 | * @param matrix Matrix used to convert local coordinates to global coordinates. |
| Siyamed Sinir | 8fe71b0 | 2022-01-15 15:21:34 -0800 | [diff] [blame] | 32 | */ |
| 33 | internal fun CursorAnchorInfo.Builder.build( |
| Siyamed Sinir | 01e9778 | 2022-01-16 07:48:22 -0800 | [diff] [blame] | 34 | textFieldValue: TextFieldValue, |
| 35 | textLayoutResult: TextLayoutResult, |
| 36 | matrix: Matrix |
| Siyamed Sinir | 8fe71b0 | 2022-01-15 15:21:34 -0800 | [diff] [blame] | 37 | ): CursorAnchorInfo { |
| 38 | reset() |
| 39 | |
| Siyamed Sinir | 01e9778 | 2022-01-16 07:48:22 -0800 | [diff] [blame] | 40 | setMatrix(matrix) |
| 41 | |
| Siyamed Sinir | 8fe71b0 | 2022-01-15 15:21:34 -0800 | [diff] [blame] | 42 | val selectionStart = textFieldValue.selection.min |
| 43 | val selectionEnd = textFieldValue.selection.max |
| 44 | setSelectionRange(selectionStart, selectionEnd) |
| 45 | |
| Siyamed Sinir | 01e9778 | 2022-01-16 07:48:22 -0800 | [diff] [blame] | 46 | setInsertionMarker(selectionStart, textLayoutResult) |
| 47 | |
| Siyamed Sinir | 8fe71b0 | 2022-01-15 15:21:34 -0800 | [diff] [blame] | 48 | // set composition |
| 49 | val compositionStart = textFieldValue.composition?.min ?: -1 |
| 50 | val compositionEnd = textFieldValue.composition?.max ?: -1 |
| 51 | |
| 52 | if (compositionStart in 0 until compositionEnd) { |
| 53 | setComposingText( |
| 54 | compositionStart, |
| 55 | textFieldValue.text.subSequence(compositionStart, compositionEnd) |
| 56 | ) |
| 57 | } |
| 58 | |
| 59 | return build() |
| 60 | } |
| Siyamed Sinir | 01e9778 | 2022-01-16 07:48:22 -0800 | [diff] [blame] | 61 | |
| 62 | private fun CursorAnchorInfo.Builder.setInsertionMarker( |
| 63 | selectionStart: Int, |
| 64 | textLayoutResult: TextLayoutResult |
| 65 | ): CursorAnchorInfo.Builder { |
| 66 | if (selectionStart < 0) return this |
| 67 | |
| 68 | val cursorRect = textLayoutResult.getCursorRect(selectionStart) |
| 69 | val isRtl = textLayoutResult.getBidiRunDirection(selectionStart) == ResolvedTextDirection.Rtl |
| 70 | |
| 71 | var flags = 0 |
| 72 | if (isRtl) flags = flags or CursorAnchorInfo.FLAG_IS_RTL |
| 73 | |
| 74 | // Sets the location of the text insertion point (zero width cursor) as a rectangle in local |
| 75 | // coordinates. |
| 76 | setInsertionMarkerLocation( |
| 77 | cursorRect.left, |
| 78 | cursorRect.top, |
| 79 | cursorRect.bottom, |
| 80 | cursorRect.bottom, |
| 81 | flags |
| 82 | ) |
| 83 | |
| 84 | return this |
| 85 | } |
