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WebView.desktop.kt
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WebView.desktop.kt
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package com.multiplatform.webview.web
import androidx.compose.runtime.*
import androidx.compose.ui.Modifier
import androidx.compose.ui.awt.SwingPanel
import com.multiplatform.webview.jsbridge.WebViewJsBridge
import compose_webview_multiplatform.webview.generated.resources.Res
import dev.datlag.kcef.KCEF
import dev.datlag.kcef.KCEFBrowser
import org.cef.browser.CefRendering
import org.jetbrains.compose.resources.ExperimentalResourceApi
/**
* Desktop WebView implementation.
*/
@Composable
actual fun ActualWebView(
state: WebViewState,
modifier: Modifier,
captureBackPresses: Boolean,
navigator: WebViewNavigator,
webViewJsBridge: WebViewJsBridge?,
onCreated: () -> Unit,
onDispose: () -> Unit,
) {
DesktopWebView(
state,
modifier,
navigator,
webViewJsBridge,
onCreated = onCreated,
onDispose = onDispose,
)
}
/**
* Desktop WebView implementation.
*/
@OptIn(ExperimentalResourceApi::class)
@Composable
fun DesktopWebView(
state: WebViewState,
modifier: Modifier,
navigator: WebViewNavigator,
webViewJsBridge: WebViewJsBridge?,
onCreated: () -> Unit,
onDispose: () -> Unit,
) {
val currentOnDispose by rememberUpdatedState(onDispose)
val client =
remember(state.webSettings.desktopWebSettings.disablePopupWindows) {
KCEF.newClientOrNullBlocking()?.also {
if (state.webSettings.desktopWebSettings.disablePopupWindows) {
it.addLifeSpanHandler(DisablePopupWindowsLifeSpanHandler())
} else {
if (it.getLifeSpanHandler() is DisablePopupWindowsLifeSpanHandler) {
it.removeLifeSpanHandler()
}
}
}
}
val scope = rememberCoroutineScope()
val fileContent by produceState("", state.content) {
value =
if (state.content is WebContent.File) {
val res = Res.readBytes("assets/${(state.content as WebContent.File).fileName}")
res.decodeToString().trimIndent()
} else {
""
}
}
val browser: KCEFBrowser? =
remember(
client,
state.webSettings.desktopWebSettings.offScreenRendering,
state.webSettings.desktopWebSettings.transparent,
state.webSettings,
fileContent,
) {
val rendering =
if (state.webSettings.desktopWebSettings.offScreenRendering) {
CefRendering.OFFSCREEN
} else {
CefRendering.DEFAULT
}
when (val current = state.content) {
is WebContent.Url ->
client?.createBrowser(
current.url,
rendering,
state.webSettings.desktopWebSettings.transparent,
createModifiedRequestContext(state.webSettings),
)
is WebContent.Data ->
client?.createBrowserWithHtml(
current.data,
current.baseUrl ?: KCEFBrowser.BLANK_URI,
rendering,
state.webSettings.desktopWebSettings.transparent,
)
is WebContent.File ->
client?.createBrowserWithHtml(
fileContent,
KCEFBrowser.BLANK_URI,
rendering,
state.webSettings.desktopWebSettings.transparent,
)
else -> {
client?.createBrowser(
KCEFBrowser.BLANK_URI,
rendering,
state.webSettings.desktopWebSettings.transparent,
createModifiedRequestContext(state.webSettings),
)
}
}
}
val desktopWebView =
remember(browser) {
if (browser != null) {
DesktopWebView(browser, scope, webViewJsBridge)
} else {
null
}
}
browser?.let {
SwingPanel(
factory = {
onCreated()
state.webView = desktopWebView
webViewJsBridge?.webView = desktopWebView
browser.apply {
addDisplayHandler(state)
addLoadListener(state, navigator)
addRequestHandler(state, navigator)
}
browser.uiComponent
},
modifier = modifier,
)
}
DisposableEffect(Unit) {
onDispose {
client?.dispose()
currentOnDispose()
}
}
}