all: rename the gioui.org/ui module to gioui.org

The "ui" is redundant and stutters.

Signed-off-by: Elias Naur <mail@eliasnaur.com>

app/log_android.go

@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: Unlicense OR MIT
+
+package app
+
+/*
+#cgo LDFLAGS: -llog
+
+#include <stdlib.h>
+#include <android/log.h>
+*/
+import "C"
+
+import (
+	"bufio"
+	"log"
+	"os"
+	"runtime"
+	"syscall"
+	"unsafe"
+)
+
+func init() {
+	// Android's logcat already includes timestamps.
+	log.SetFlags(log.Flags() &^ log.LstdFlags)
+	logFd(os.Stdout.Fd())
+	logFd(os.Stderr.Fd())
+}
+
+func logFd(fd uintptr) {
+	r, w, err := os.Pipe()
+	if err != nil {
+		panic(err)
+	}
+	if err := syscall.Dup3(int(w.Fd()), int(fd), syscall.O_CLOEXEC); err != nil {
+		panic(err)
+	}
+	go func() {
+		tag := C.CString("gio")
+		defer C.free(unsafe.Pointer(tag))
+		// 1024 is the truncation limit from android/log.h, plus a \n.
+		lineBuf := bufio.NewReaderSize(r, 1024)
+		// The buffer to pass to C, including the terminating '\0'.
+		buf := make([]byte, lineBuf.Size()+1)
+		cbuf := (*C.char)(unsafe.Pointer(&buf[0]))
+		for {
+			line, _, err := lineBuf.ReadLine()
+			if err != nil {
+				break
+			}
+			copy(buf, line)
+			buf[len(line)] = 0
+			C.__android_log_write(C.ANDROID_LOG_INFO, tag, cbuf)
+		}
+		// The garbage collector doesn't know that w's fd was dup'ed.
+		// Avoid finalizing w, and thereby avoid its finalizer closing its fd.
+		runtime.KeepAlive(w)
+	}()
+}