github.com/jonasnick/go-ethereum@v0.7.12-0.20150216215225-22176f05d387/cmd/mist/html_container.go (about)

     1  /*
     2  	This file is part of go-ethereum
     3  
     4  	go-ethereum is free software: you can redistribute it and/or modify
     5  	it under the terms of the GNU General Public License as published by
     6  	the Free Software Foundation, either version 3 of the License, or
     7  	(at your option) any later version.
     8  
     9  	go-ethereum is distributed in the hope that it will be useful,
    10  	but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    12  	GNU General Public License for more details.
    13  
    14  	You should have received a copy of the GNU General Public License
    15  	along with go-ethereum.  If not, see <http://www.gnu.org/licenses/>.
    16  */
    17  /**
    18   * @authors
    19   * 	Jeffrey Wilcke <i@jev.io>
    20   */
    21  package main
    22  
    23  import (
    24  	"errors"
    25  	"fmt"
    26  	"io/ioutil"
    27  	"net/url"
    28  	"os"
    29  	"path"
    30  	"path/filepath"
    31  
    32  	"github.com/jonasnick/go-ethereum/core/types"
    33  	"github.com/jonasnick/go-ethereum/ethutil"
    34  	"github.com/jonasnick/go-ethereum/xeth"
    35  	"github.com/howeyc/fsnotify"
    36  	"github.com/obscuren/qml"
    37  )
    38  
    39  type HtmlApplication struct {
    40  	win     *qml.Window
    41  	webView qml.Object
    42  	engine  *qml.Engine
    43  	lib     *UiLib
    44  	path    string
    45  	watcher *fsnotify.Watcher
    46  }
    47  
    48  func NewHtmlApplication(path string, lib *UiLib) *HtmlApplication {
    49  	engine := qml.NewEngine()
    50  
    51  	return &HtmlApplication{engine: engine, lib: lib, path: path}
    52  
    53  }
    54  
    55  func (app *HtmlApplication) Create() error {
    56  	component, err := app.engine.LoadFile(app.lib.AssetPath("qml/webapp.qml"))
    57  	if err != nil {
    58  		return err
    59  	}
    60  
    61  	if filepath.Ext(app.path) == "eth" {
    62  		return errors.New("Ethereum package not yet supported")
    63  
    64  		// TODO
    65  		//ethutil.OpenPackage(app.path)
    66  	}
    67  
    68  	win := component.CreateWindow(nil)
    69  	win.Set("url", app.path)
    70  	webView := win.ObjectByName("webView")
    71  
    72  	app.win = win
    73  	app.webView = webView
    74  
    75  	return nil
    76  }
    77  
    78  func (app *HtmlApplication) RootFolder() string {
    79  	folder, err := url.Parse(app.path)
    80  	if err != nil {
    81  		return ""
    82  	}
    83  	return path.Dir(ethutil.WindonizePath(folder.RequestURI()))
    84  }
    85  func (app *HtmlApplication) RecursiveFolders() []os.FileInfo {
    86  	files, _ := ioutil.ReadDir(app.RootFolder())
    87  	var folders []os.FileInfo
    88  	for _, file := range files {
    89  		if file.IsDir() {
    90  			folders = append(folders, file)
    91  		}
    92  	}
    93  	return folders
    94  }
    95  
    96  func (app *HtmlApplication) NewWatcher(quitChan chan bool) {
    97  	var err error
    98  
    99  	app.watcher, err = fsnotify.NewWatcher()
   100  	if err != nil {
   101  		guilogger.Infoln("Could not create new auto-reload watcher:", err)
   102  		return
   103  	}
   104  	err = app.watcher.Watch(app.RootFolder())
   105  	if err != nil {
   106  		guilogger.Infoln("Could not start auto-reload watcher:", err)
   107  		return
   108  	}
   109  	for _, folder := range app.RecursiveFolders() {
   110  		fullPath := app.RootFolder() + "/" + folder.Name()
   111  		app.watcher.Watch(fullPath)
   112  	}
   113  
   114  	go func() {
   115  	out:
   116  		for {
   117  			select {
   118  			case <-quitChan:
   119  				app.watcher.Close()
   120  				break out
   121  			case <-app.watcher.Event:
   122  				//guilogger.Debugln("Got event:", ev)
   123  				app.webView.Call("reload")
   124  			case err := <-app.watcher.Error:
   125  				// TODO: Do something here
   126  				guilogger.Infoln("Watcher error:", err)
   127  			}
   128  		}
   129  	}()
   130  
   131  }
   132  
   133  func (app *HtmlApplication) Engine() *qml.Engine {
   134  	return app.engine
   135  }
   136  
   137  func (app *HtmlApplication) Window() *qml.Window {
   138  	return app.win
   139  }
   140  
   141  func (app *HtmlApplication) NewBlock(block *types.Block) {
   142  	b := &xeth.Block{Number: int(block.NumberU64()), Hash: ethutil.Bytes2Hex(block.Hash())}
   143  	app.webView.Call("onNewBlockCb", b)
   144  }
   145  
   146  func (app *HtmlApplication) Destroy() {
   147  	app.engine.Destroy()
   148  }
   149  
   150  func (app *HtmlApplication) Post(data string, seed int) {
   151  	fmt.Println("about to call 'post'")
   152  	app.webView.Call("post", seed, data)
   153  }