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Merge pull request #99 from che-incubator/rebase-projector-sources
Rebase against the upstream Projector sources
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118 changes: 118 additions & 0 deletions
118
...ojector-client-web/src/main/kotlin/org/jetbrains/projector/client/web/ClipboardHandler.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| /* | ||
| * MIT License | ||
| * | ||
| * Copyright (c) 2019-2021 JetBrains s.r.o. | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in all | ||
| * copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| * SOFTWARE. | ||
| */ | ||
| package org.jetbrains.projector.client.web | ||
|
|
||
| import kotlinx.browser.document | ||
| import kotlinx.browser.window | ||
| import org.jetbrains.projector.client.web.misc.isDefined | ||
| import org.jetbrains.projector.client.web.misc.isElectron | ||
| import org.jetbrains.projector.client.web.misc.isGecko | ||
| import org.jetbrains.projector.common.protocol.toServer.ClientNotificationEvent | ||
| import org.jetbrains.projector.common.protocol.toServer.ClientNotificationType | ||
| import org.jetbrains.projector.util.logging.Logger | ||
| import org.w3c.dom.HTMLTextAreaElement | ||
|
|
||
| /** | ||
| * First try to copy via `window.navigator.clipboard`. If this method fails or is not available, | ||
| * then try to copy via `document.execCommand` (deprecated, but still supported by firefox). | ||
| * If this also fails, then fallback to asking user to copy manually. | ||
| */ | ||
| class ClipboardHandler(private val onCopyFailed: (ClientNotificationEvent) -> Unit) { | ||
|
|
||
| private val logger = Logger<ClipboardHandler>() | ||
|
|
||
| fun copyText(text: String) { | ||
| if (isDefined(window.navigator.clipboard)) { | ||
| window.navigator.clipboard.writeText(text) | ||
| .catch { | ||
| logger.error(it) { "Error writing clipboard: $it" } | ||
| fallbackCopy(text, it.message ?: "Unknown error") | ||
| } | ||
| } | ||
| else { | ||
| fallbackCopy(text, "Clipboard API is not available") | ||
| } | ||
| } | ||
|
|
||
| private fun fallbackCopy(textToCopy: String, reason: String) { | ||
| val execCommandReason = tryCopyTextViaExecCommand(textToCopy) | ||
| if (execCommandReason != null) { | ||
| askUserToCopyClipboardManually(textToCopy, reason, execCommandReason) | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Tries to automatically copy text to clipboard via Document.execCommand | ||
| * | ||
| * @return null if copy successful, string describing fail reason otherwise | ||
| */ | ||
| private fun tryCopyTextViaExecCommand(textToCopy: String): String? { | ||
|
|
||
| when { | ||
| !isDefined(js("document.execCommand")) -> return "Document.execCommand is not available" | ||
|
|
||
| // Chrome only allows Document.execCommand from event callbacks | ||
| !isGecko() -> return "Copying using Document.execCommand works only in Firefox" | ||
| } | ||
|
|
||
| val textArea = document.createElement("textarea") as HTMLTextAreaElement | ||
| textArea.id = "copyArea" | ||
| textArea.value = textToCopy | ||
| textArea.style.display = "hidden" | ||
|
|
||
| document.body!!.appendChild(textArea) | ||
|
|
||
| textArea.focus() | ||
| textArea.select() | ||
|
|
||
| var isCopied = false | ||
| try { | ||
| isCopied = document.execCommand("copy") | ||
| } | ||
| catch (t: Throwable) { // May throw SecurityError https://dvcs.w3.org/hg/editing/raw-file/tip/editing.html#the-copy-command | ||
| logger.error(t) { "Error while running 'document.execCommand(\"copy\")'" } | ||
| } | ||
| finally { | ||
| textArea.remove() | ||
| } | ||
|
|
||
| return if (isCopied) null else "Document.execCommand failed, check console for info from browser" | ||
| } | ||
|
|
||
| private fun askUserToCopyClipboardManually(textToCopy: String, vararg reasons: String) { | ||
| val message = "A clipboard change on the server detected but can't synchronize your clipboard with it automatically " + | ||
| "(reasons: ${reasons.joinToString("; ")}). Please copy text on next line manually:" | ||
|
|
||
| if (isElectron()) { // TODO window.prompt is not available in electron | ||
| val title = "Copying failed" | ||
| val notificationMessage = "Copying is not currently supported in insecure context in Projector launcher" | ||
| val type = ClientNotificationType.ERROR | ||
| onCopyFailed(ClientNotificationEvent(title, notificationMessage, type)) | ||
| } | ||
| else { | ||
| window.prompt(message, textToCopy) | ||
| } | ||
| } | ||
|
|
||
| } |
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