Split off External applications from main library

External applications now accept containers which function as the
frontend where the ExtApplication functions as the backend. Containers
execute within their own engine and have their own context and are
destroyed when released.

ethereal/ui/ui_lib.go

@@ -6,9 +6,9 @@ import (
 	"github.com/ethereum/eth-go"
 	"github.com/ethereum/eth-go/ethchain"
 	"github.com/ethereum/eth-go/ethutil"
-	"github.com/obscuren/mutan"
 	"github.com/ethereum/go-ethereum/utils"
 	"github.com/go-qml/qml"
+	"github.com/obscuren/mutan"
 	"os"
 	"path"
 	"path/filepath"
@@ -53,60 +53,18 @@ func (ui *UiLib) Open(path string) {
 }
 
 func (ui *UiLib) OpenHtml(path string) {
-	component, err := ui.engine.LoadFile(ui.AssetPath("qml/webapp.qml"))
-	if err != nil {
-		ethutil.Config.Log.Debugln(err)
+	container := NewHtmlApplication(path, ui)
+	app := NewExtApplication(container, ui)
 
-		return
+	go app.run()
+}
+
+func (ui *UiLib) Watch(addr, storageAddr string) {
+	if len(storageAddr) == 0 {
+		ui.eth.Reactor().Subscribe("storage:"+string(ethutil.FromHex(addr))+":"+string(ethutil.FromHex(storageAddr)), nil)
+	} else {
+		ui.eth.Reactor().Subscribe("object:"+string(ethutil.FromHex(addr)), nil)
 	}
-	win := component.CreateWindow(nil)
-	if filepath.Ext(path) == "eth" {
-		fmt.Println("Ethereum package not yet supported")
-
-		return
-
-		// TODO
-		ethutil.OpenPackage(path)
-	}
-	win.Set("url", path)
-
-	webView := win.ObjectByName("webView")
-	go func() {
-		blockChan := make(chan ethutil.React, 1)
-		addrChan := make(chan ethutil.React, 1)
-		quitChan := make(chan bool)
-
-		go func() {
-		out:
-			for {
-				select {
-				case <-quitChan:
-					ui.eth.Reactor().Unsubscribe("newBlock", blockChan)
-					break out
-				case block := <-blockChan:
-					if block, ok := block.Resource.(*ethchain.Block); ok {
-						b := &QBlock{Number: int(block.BlockInfo().Number), Hash: ethutil.Hex(block.Hash())}
-						webView.Call("onNewBlockCb", b)
-					}
-				case stateObject := <-addrChan:
-					if stateObject, ok := stateObject.Resource.(*ethchain.StateObject); ok {
-						webView.Call("onObjectChangeCb", NewQStateObject(stateObject))
-					}
-				}
-			}
-
-			// Clean up
-			close(blockChan)
-			close(quitChan)
-		}()
-		ui.eth.Reactor().Subscribe("newBlock", blockChan)
-		ui.eth.Reactor().Subscribe("addressChanged", addrChan)
-
-		win.Show()
-		win.Wait()
-
-		quitChan <- true
-	}()
 }
 
 func (ui *UiLib) Muted(content string) {