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app/internal/window: [Android] implement clipboard

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Updates gio#31

Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2020-05-17 15:42:24 +02:00
parent 268e9e44b8
commit 1e934673d7
4 changed files with 65 additions and 49 deletions
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app/internal/window/os_android.go
+37 -30
View File
@@ -74,6 +74,7 @@ type window struct {
win *C.ANativeWindow
animating bool
// Cached Java methods.
mgetDensity C.jmethodID
mgetFontScale C.jmethodID
mshowTextInput C.jmethodID
@@ -81,6 +82,9 @@ type window struct {
mpostFrameCallback C.jmethodID
mpostFrameCallbackOnMainThread C.jmethodID
mRegisterFragment C.jmethodID
mwakeupMainThread C.jmethodID
mwriteClipboard C.jmethodID
mreadClipboard C.jmethodID
}
type jvalue uint64 // The largest JNI type fits in 64 bits.
@@ -96,18 +100,14 @@ var android struct {
// The global Android App context.
appCtx C.jobject
// The Gio class reference.
gioCls C.jclass
// Cached Java methods.
writeClipboard C.jmethodID
readClipboard C.jmethodID
}
var views = make(map[C.jlong]*window)
var mainWindow = newWindowRendezvous()
var mainFuncs = make(chan func(env *C.JNIEnv), 1)
func getMethodID(env *C.JNIEnv, class C.jclass, method, sig string) C.jmethodID {
m := C.CString(method)
defer C.free(unsafe.Pointer(m))
@@ -153,10 +153,7 @@ func initJVM(env *C.JNIEnv, gio C.jclass, ctx C.jobject) {
if res := C.gio_jni_GetJavaVM(env, &android.jvm); res != 0 {
panic("gio: GetJavaVM failed")
}
android.writeClipboard = getStaticMethodID(env, gio, "writeClipboard", "(Landroid/content/Context;Ljava/lang/String;)V")
android.readClipboard = getStaticMethodID(env, gio, "readClipboard", "(Landroid/content/Context;)Ljava/lang/String;")
android.appCtx = C.gio_jni_NewGlobalRef(env, ctx)
android.gioCls = C.jclass(C.gio_jni_NewGlobalRef(env, C.jobject(gio)))
}
func JavaVM() uintptr {
@@ -192,6 +189,9 @@ func Java_org_gioui_GioView_onCreateView(env *C.JNIEnv, class C.jclass, view C.j
mpostFrameCallback: getMethodID(env, class, "postFrameCallback", "()V"),
mpostFrameCallbackOnMainThread: getMethodID(env, class, "postFrameCallbackOnMainThread", "()V"),
mRegisterFragment: getMethodID(env, class, "registerFragment", "(Ljava/lang/String;)V"),
mwakeupMainThread: getMethodID(env, class, "wakeupMainThread", "()V"),
mwriteClipboard: getMethodID(env, class, "writeClipboard", "(Ljava/lang/String;)V"),
mreadClipboard: getMethodID(env, class, "readClipboard", "()Ljava/lang/String;"),
}
wopts := <-mainWindow.out
w.callbacks = wopts.window
@@ -619,33 +619,40 @@ func NewWindow(window Callbacks, opts *Options) error {
return <-mainWindow.errs
}
func WriteClipboard(s string) error {
var jerr error
jvm := javaVM()
if jvm == nil {
return errors.New("clipboard: the JVM is not yet available")
}
runInJVM(jvm, func(env *C.JNIEnv) {
func (w *window) WriteClipboard(s string) {
w.runOnMain(func(env *C.JNIEnv) {
jstr := javaString(env, s)
jerr = callStaticVoidMethod(env, android.gioCls, android.writeClipboard, jvalue(android.appCtx), jvalue(jstr))
callVoidMethod(env, w.view, w.mwriteClipboard, jvalue(jstr))
})
return jerr
}
func ReadClipboard() (string, error) {
var clipboard string
var jerr error
jvm := javaVM()
if jvm == nil {
return "", errors.New("clipboard: the JVM is not yet available")
}
runInJVM(jvm, func(env *C.JNIEnv) {
c, err := callStaticObjectMethod(env, android.gioCls, android.readClipboard, jvalue(android.appCtx))
func (w *window) ReadClipboard() {
w.runOnMain(func(env *C.JNIEnv) {
c, err := callObjectMethod(env, w.view, w.mreadClipboard)
if err != nil {
jerr = err
return
}
clipboard = goString(env, C.jstring(c))
content := goString(env, C.jstring(c))
w.callbacks.Event(system.ClipboardEvent{Text: content})
})
return clipboard, jerr
}
// runOnMain runs a function on the Java main thread.
func (w *window) runOnMain(f func(env *C.JNIEnv)) {
mainFuncs <- f
runInJVM(javaVM(), func(env *C.JNIEnv) {
callVoidMethod(env, w.view, w.mwakeupMainThread)
})
}
//export Java_org_gioui_GioView_scheduleMainFuncs
func Java_org_gioui_GioView_scheduleMainFuncs(env *C.JNIEnv, this C.jobject) {
for {
select {
case f := <-mainFuncs:
f(env)
default:
return
}
}
}