compose/ui/ui-text/src/commonMain/kotlin/androidx/compose/ui/text/input/TextInputService.kt - platform/frameworks/support - Git at Google

 /*
  * Copyright 2019 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.ui.text.input

 import androidx.compose.ui.geometry.Rect
 import androidx.compose.ui.text.AtomicReference

 /**
  * Handles communication with the IME. Informs about the IME changes via [EditCommand]s and
  * provides utilities for working with software keyboard.
  *
  * This class is responsible for ensuring there is only one open [TextInputSession] which will
  * interact with software keyboards. Start new a TextInputSession by calling [startInput] and
  * close it with [stopInput].
  */
 // Open for testing purposes.
 open class TextInputService(private val platformTextInputService: PlatformTextInputService) {
     private val _currentInputSession: AtomicReference<TextInputSession?> =
         AtomicReference(null)

     internal val currentInputSession: TextInputSession?
         get() = _currentInputSession.get()

     /**
      * Start text input session for given client.
      *
      * If there is a previous [TextInputSession] open, it will immediately be closed by this call
      * to [startInput].
      *
      * @param value initial [TextFieldValue]
      * @param imeOptions IME configuration
      * @param onEditCommand callback to inform about changes requested by IME
      * @param onImeActionPerformed callback to inform if an IME action such as [ImeAction.Done]
      * etc occurred.
      */
     open fun startInput(
         value: TextFieldValue,
         imeOptions: ImeOptions,
         onEditCommand: (List<EditCommand>) -> Unit,
         onImeActionPerformed: (ImeAction) -> Unit
     ): TextInputSession {
         platformTextInputService.startInput(
             value,
             imeOptions,
             onEditCommand,
             onImeActionPerformed
         )
         val nextSession = TextInputSession(this, platformTextInputService)
         _currentInputSession.set(nextSession)
         return nextSession
     }

     /**
      * Stop text input session.
      *
      * If the [session] is not the currently open session, no action will occur.
      *
      * @param session the session returned by [startInput] call.
      */
     open fun stopInput(session: TextInputSession) {
         if (_currentInputSession.compareAndSet(session, null)) {
             platformTextInputService.stopInput()
         }
     }

     /**
      * Request showing onscreen keyboard.
      *
      * This call will be ignored if there is not an open [TextInputSession], as it means there is
      * nothing that will accept typed input. The most common way to open a TextInputSession is to
      * set the focus to an editable text composable.
      *
      * There is no guarantee that the keyboard will be shown. The software keyboard or
      * system service may silently ignore this request.
      */
     @Deprecated(
         message = "Use SoftwareKeyboardController.show or " +
             "TextInputSession.showSoftwareKeyboard instead.",
         replaceWith = ReplaceWith("textInputSession.showSoftwareKeyboard()")
     )
     // TODO(b/183448615) @InternalTextApi
     fun showSoftwareKeyboard() {
         if (_currentInputSession.get() != null) {
             platformTextInputService.showSoftwareKeyboard()
         }
     }

     /**
      * Hide onscreen keyboard.
      */
     @Deprecated(
         message = "Use SoftwareKeyboardController.hide or " +
             "TextInputSession.hideSoftwareKeyboard instead.",
         replaceWith = ReplaceWith("textInputSession.hideSoftwareKeyboard()")
     )
     // TODO(b/183448615) @InternalTextApi
     fun hideSoftwareKeyboard(): Unit = platformTextInputService.hideSoftwareKeyboard()
 }
 /**
  * Represents a input session for interactions between a soft keyboard and editable text.
  *
  * This session may be closed at any time by [TextInputService] or by calling [dispose], after
  * which [isOpen] will return false and all further calls will have no effect.
  */
 class TextInputSession(
     private val textInputService: TextInputService,
     private val platformTextInputService: PlatformTextInputService
 ) {
     /**
      * If this session is currently open.
      *
      * A session may be closed at any time by [TextInputService] or by calling [dispose].
      */
     val isOpen: Boolean
         get() = textInputService.currentInputSession == this

     /**
      * Close this input session.
      *
      * All further calls to this object will have no effect, and [isOpen] will return false.
      *
      * Note, [TextInputService] may also close this input session at any time without calling
      * dispose. Calling dispose after this session has been closed has no effect.
      */
     fun dispose() {
         textInputService.stopInput(this)
     }

     /**
      * Execute [block] if [isOpen] is true.
      *
      * This function will only check [isOpen] once, and may execute the action after the input
      * session closes in the case of concurrent execution.
      *
      * @param block action to take if isOpen
      * @return true if an action was performed
      */
     private inline fun ensureOpenSession(block: () -> Unit): Boolean {
         return isOpen.also { applying ->
             if (applying) {
                 block()
             }
         }
     }

     @Suppress("DeprecatedCallableAddReplaceWith", "DEPRECATION")
     @Deprecated("This method should not be called, used BringIntoViewRequester instead.")
     fun notifyFocusedRect(rect: Rect): Boolean = ensureOpenSession {
         platformTextInputService.notifyFocusedRect(rect)
     }

     /**
      * Notify IME about the new [TextFieldValue] and latest state of the editing buffer. [oldValue]
      * is the state of the buffer before the changes applied by the [newValue].
      *
      * [oldValue] represents the changes that was requested by IME on the buffer, and [newValue]
      * is the final state of the editing buffer that was requested by the application. In cases
      * where [oldValue] is not equal to [newValue], it would mean the IME suggested value is
      * rejected, and the IME connection will be restarted with the newValue.
      *
      * If the session is not open, action will be performed.
      *
      * @param oldValue the value that was requested by IME on the buffer
      * @param newValue final state of the editing buffer that was requested by the application
      * @return false if this session expired and no action was performed
      */
     fun updateState(
         oldValue: TextFieldValue?,
         newValue: TextFieldValue
     ): Boolean = ensureOpenSession {
         platformTextInputService.updateState(oldValue, newValue)
     }

     /**
      * Request showing onscreen keyboard.
      *
      * This call will have no effect if this session is not open.
      *
      * This should be used instead of [TextInputService.showSoftwareKeyboard] when implementing a
      * new editable text composable to show the keyboard in response to events related to that
      * composable.
      *
      * There is no guarantee that the keyboard will be shown. The software keyboard or
      * system service may silently ignore this request.
      *
      * @return false if this session expired and no action was performed
      */
     fun showSoftwareKeyboard(): Boolean = ensureOpenSession {
         platformTextInputService.showSoftwareKeyboard()
     }

     /**
      * Hide onscreen keyboard for a specific [TextInputSession].
      *
      * This call will have no effect if this session is not open.
      *
      * This should be used instead of [TextInputService.showSoftwareKeyboard] when implementing a
      * new editable text composable to hide the keyboard in response to events related to that
      * composable.
      *
      * @return false if this session expired and no action was performed
      */
     fun hideSoftwareKeyboard(): Boolean = ensureOpenSession {
         platformTextInputService.hideSoftwareKeyboard()
     }
 }

 /**
  * Platform specific text input service.
  */
 interface PlatformTextInputService {
     /**
      * Start text input session for given client.
      *
      * @see TextInputService.startInput
      */
     fun startInput(
         value: TextFieldValue,
         imeOptions: ImeOptions,
         onEditCommand: (List<EditCommand>) -> Unit,
         onImeActionPerformed: (ImeAction) -> Unit
     )

     /**
      * Stop text input session.
      *
      * @see TextInputService.stopInput
      */
     fun stopInput()

     /**
      * Request showing onscreen keyboard
      *
      * There is no guarantee nor callback of the result of this API.
      *
      * @see TextInputService.showSoftwareKeyboard
      */
     fun showSoftwareKeyboard()

     /**
      * Hide software keyboard
      *
      * @see TextInputService.hideSoftwareKeyboard
      */
     fun hideSoftwareKeyboard()

     /*
      * Notify the new editor model to IME.
      *
      * @see TextInputService.updateState
      */
     fun updateState(oldValue: TextFieldValue?, newValue: TextFieldValue)

     @Deprecated("This method should not be called, used BringIntoViewRequester instead.")
     fun notifyFocusedRect(rect: Rect) {
     }
 }
	/*
	* Copyright 2019 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.ui.text.input

	import androidx.compose.ui.geometry.Rect
	import androidx.compose.ui.text.AtomicReference

	/**
	* Handles communication with the IME. Informs about the IME changes via [EditCommand]s and
	* provides utilities for working with software keyboard.
	*
	* This class is responsible for ensuring there is only one open [TextInputSession] which will
	* interact with software keyboards. Start new a TextInputSession by calling [startInput] and
	* close it with [stopInput].
	*/
	// Open for testing purposes.
	open class TextInputService(private val platformTextInputService: PlatformTextInputService) {
	private val _currentInputSession: AtomicReference<TextInputSession?> =
	AtomicReference(null)

	internal val currentInputSession: TextInputSession?
	get() = _currentInputSession.get()

	/**
	* Start text input session for given client.
	*
	* If there is a previous [TextInputSession] open, it will immediately be closed by this call
	* to [startInput].
	*
	* @param value initial [TextFieldValue]
	* @param imeOptions IME configuration
	* @param onEditCommand callback to inform about changes requested by IME
	* @param onImeActionPerformed callback to inform if an IME action such as [ImeAction.Done]
	* etc occurred.
	*/
	open fun startInput(
	value: TextFieldValue,
	imeOptions: ImeOptions,
	onEditCommand: (List<EditCommand>) -> Unit,
	onImeActionPerformed: (ImeAction) -> Unit
	): TextInputSession {
	platformTextInputService.startInput(
	value,
	imeOptions,
	onEditCommand,
	onImeActionPerformed
	)
	val nextSession = TextInputSession(this, platformTextInputService)
	_currentInputSession.set(nextSession)
	return nextSession
	}

	/**
	* Stop text input session.
	*
	* If the [session] is not the currently open session, no action will occur.
	*
	* @param session the session returned by [startInput] call.
	*/
	open fun stopInput(session: TextInputSession) {
	if (_currentInputSession.compareAndSet(session, null)) {
	platformTextInputService.stopInput()
	}
	}

	/**
	* Request showing onscreen keyboard.
	*
	* This call will be ignored if there is not an open [TextInputSession], as it means there is
	* nothing that will accept typed input. The most common way to open a TextInputSession is to
	* set the focus to an editable text composable.
	*
	* There is no guarantee that the keyboard will be shown. The software keyboard or
	* system service may silently ignore this request.
	*/
	@Deprecated(
	message = "Use SoftwareKeyboardController.show or " +
	"TextInputSession.showSoftwareKeyboard instead.",
	replaceWith = ReplaceWith("textInputSession.showSoftwareKeyboard()")
	)
	// TODO(b/183448615) @InternalTextApi
	fun showSoftwareKeyboard() {
	if (_currentInputSession.get() != null) {
	platformTextInputService.showSoftwareKeyboard()
	}
	}

	/**
	* Hide onscreen keyboard.
	*/
	@Deprecated(
	message = "Use SoftwareKeyboardController.hide or " +
	"TextInputSession.hideSoftwareKeyboard instead.",
	replaceWith = ReplaceWith("textInputSession.hideSoftwareKeyboard()")
	)
	// TODO(b/183448615) @InternalTextApi
	fun hideSoftwareKeyboard(): Unit = platformTextInputService.hideSoftwareKeyboard()
	}
	/**
	* Represents a input session for interactions between a soft keyboard and editable text.
	*
	* This session may be closed at any time by [TextInputService] or by calling [dispose], after
	* which [isOpen] will return false and all further calls will have no effect.
	*/
	class TextInputSession(
	private val textInputService: TextInputService,
	private val platformTextInputService: PlatformTextInputService
	) {
	/**
	* If this session is currently open.
	*
	* A session may be closed at any time by [TextInputService] or by calling [dispose].
	*/
	val isOpen: Boolean
	get() = textInputService.currentInputSession == this

	/**
	* Close this input session.
	*
	* All further calls to this object will have no effect, and [isOpen] will return false.
	*
	* Note, [TextInputService] may also close this input session at any time without calling
	* dispose. Calling dispose after this session has been closed has no effect.
	*/
	fun dispose() {
	textInputService.stopInput(this)
	}

	/**
	* Execute [block] if [isOpen] is true.
	*
	* This function will only check [isOpen] once, and may execute the action after the input
	* session closes in the case of concurrent execution.
	*
	* @param block action to take if isOpen
	* @return true if an action was performed
	*/
	private inline fun ensureOpenSession(block: () -> Unit): Boolean {
	return isOpen.also { applying ->
	if (applying) {
	block()
	}
	}
	}

	@Suppress("DeprecatedCallableAddReplaceWith", "DEPRECATION")
	@Deprecated("This method should not be called, used BringIntoViewRequester instead.")
	fun notifyFocusedRect(rect: Rect): Boolean = ensureOpenSession {
	platformTextInputService.notifyFocusedRect(rect)
	}

	/**
	* Notify IME about the new [TextFieldValue] and latest state of the editing buffer. [oldValue]
	* is the state of the buffer before the changes applied by the [newValue].
	*
	* [oldValue] represents the changes that was requested by IME on the buffer, and [newValue]
	* is the final state of the editing buffer that was requested by the application. In cases
	* where [oldValue] is not equal to [newValue], it would mean the IME suggested value is
	* rejected, and the IME connection will be restarted with the newValue.
	*
	* If the session is not open, action will be performed.
	*
	* @param oldValue the value that was requested by IME on the buffer
	* @param newValue final state of the editing buffer that was requested by the application
	* @return false if this session expired and no action was performed
	*/
	fun updateState(
	oldValue: TextFieldValue?,
	newValue: TextFieldValue
	): Boolean = ensureOpenSession {
	platformTextInputService.updateState(oldValue, newValue)
	}

	/**
	* Request showing onscreen keyboard.
	*
	* This call will have no effect if this session is not open.
	*
	* This should be used instead of [TextInputService.showSoftwareKeyboard] when implementing a
	* new editable text composable to show the keyboard in response to events related to that
	* composable.
	*
	* There is no guarantee that the keyboard will be shown. The software keyboard or
	* system service may silently ignore this request.
	*
	* @return false if this session expired and no action was performed
	*/
	fun showSoftwareKeyboard(): Boolean = ensureOpenSession {
	platformTextInputService.showSoftwareKeyboard()
	}

	/**
	* Hide onscreen keyboard for a specific [TextInputSession].
	*
	* This call will have no effect if this session is not open.
	*
	* This should be used instead of [TextInputService.showSoftwareKeyboard] when implementing a
	* new editable text composable to hide the keyboard in response to events related to that
	* composable.
	*
	* @return false if this session expired and no action was performed
	*/
	fun hideSoftwareKeyboard(): Boolean = ensureOpenSession {
	platformTextInputService.hideSoftwareKeyboard()
	}
	}

	/**
	* Platform specific text input service.
	*/
	interface PlatformTextInputService {
	/**
	* Start text input session for given client.
	*
	* @see TextInputService.startInput
	*/
	fun startInput(
	value: TextFieldValue,
	imeOptions: ImeOptions,
	onEditCommand: (List<EditCommand>) -> Unit,
	onImeActionPerformed: (ImeAction) -> Unit
	)

	/**
	* Stop text input session.
	*
	* @see TextInputService.stopInput
	*/
	fun stopInput()

	/**
	* Request showing onscreen keyboard
	*
	* There is no guarantee nor callback of the result of this API.
	*
	* @see TextInputService.showSoftwareKeyboard
	*/
	fun showSoftwareKeyboard()

	/**
	* Hide software keyboard
	*
	* @see TextInputService.hideSoftwareKeyboard
	*/
	fun hideSoftwareKeyboard()

	/*
	* Notify the new editor model to IME.
	*
	* @see TextInputService.updateState
	*/
	fun updateState(oldValue: TextFieldValue?, newValue: TextFieldValue)

	@Deprecated("This method should not be called, used BringIntoViewRequester instead.")
	fun notifyFocusedRect(rect: Rect) {
	}
	}