Drophash in Python dialects

Iron Python 1.1

Now for IronPython 1.1 — annoyingly the WebBrowser control doesn't accept normal DnD, nor does it let you paint it to a bitmap to blit on another control, so this one uses a ListView.

import clr
clr.AddReferenceByPartialName("System.Windows.Forms")
clr.AddReferenceByPartialName("System.Drawing")

from System.Windows.Forms import *
from System.Drawing import *

from md5 import *
from sha import *

pane = None
hashes = [md5, sha]
nbsp = list(" ")


def getHash(file, hashOp, delimiter) :

    try :
        reader = open(file, 'rb')
    except :
        return ""
   
    try :
        digest = hashOp()
        while True :
            chunk = reader.read(1024)
            if not chunk :
                break
            digest.update(chunk)
    finally:
        reader.close()

    raw = digest.hexdigest()
    work = []
    i = 0
    while i < len(raw) :
        work.append(raw[i])
        i += 1
        if 0 == (i%8) :
            work = work + delimiter

    return ''.join(work)

def dragOver(sender, evt):
  evt.Effect = DragDropEffects.Link
 
def dragDrop(sender, evt):
  global pane
  data = evt.Data
  data = data.GetData(DataFormats.FileDrop)
  num = pane.Items.Count
 
  for file in data:
    pane.Items.Add(file)
    for hashOp in hashes :
      anHash = getHash(file, hashOp, nbsp)
      pane.Items[num].SubItems.Add(anHash)
    num += 1
      
    


def decorate(frame):
    global pane
    frame.Text = "IronPython - Drophash"
    ## optional icon
    ## ico = Image.FromFile("drophash.ico")
    ## frame.Icon = Icon.FromHandle(ico.GetHicon());
    pane = ListView()
    pane.Dock = DockStyle.Fill;
    frame.Controls.Add(pane)
    pane.AllowDrop = True
    pane.DragOver += dragOver
    pane.DragEnter += dragOver
    pane.DragDrop += dragDrop
    pane.View = View.Details
    pane.Columns.Add("File name", 100, HorizontalAlignment.Left)
    pane.Columns.Add("MD5", 200, HorizontalAlignment.Left)
    pane.Columns.Add("SHA-1", 200, HorizontalAlignment.Left)


if __name__ == "__main__":
    frame = Form()
    decorate(frame)
    Application.Run(frame)

Jython 2.2

Jython next; but rather than coding the messy .ico to image transformation again, use a PNG icon (save as drophash.png) instead:—

import sys
import os.path
sys.packageManager.makeJavaPackage("javax.swing", "JWindow", None)
sys.packageManager.makeJavaPackage("java.awt", "Window", None)
sys.packageManager.makeJavaPackage("java.awt.dnd", "DropTargetListener", None)
sys.packageManager.makeJavaPackage("java.awt.datatransfer", "DataFlavor", None)
import javax.swing
import java.lang
import java.awt.dnd
import java.awt.datatransfer

from md5 import *
from sha import *

pane = None
hashes = [md5, sha]
nbsp = list(" ")
target = None

def getHash(file, hashOp, delimiter) :

  try :
    reader = open(file, 'rb')
  except :
    return ""
  
  try :
    digest = hashOp()

  while True :
    chunk = reader.read(1024)
    if not chunk :
      break

      digest.update(chunk)
  finally:
    reader.close()
        
  raw = digest.hexdigest()
  work = []
  i = 0
  while i < len(raw) :
    work.append(raw[i])
    i += 1
    if 0 == (i%8) :
      work = work + delimiter

  return ''.join(work)
  
def OnDropFiles(filenames) :
  global pane, nbsp, hashes
  pane.text += "<table border=1><tr><th>File</th><th>MD5</th><th>SHA-1</th></tr>"
  for file in filenames :
    pane.text += "<tr><td>%s</td>" % file

    for hashOp in hashes :
      anHash = getHash(str(file), hashOp, nbsp)
      pane.text += "<td><pre>%s</pre></td>" % anHash

  pane.text +="</tr>"
  pane.text +="</table>"

  

class dropHandler(java.awt.dnd.DropTargetAdapter):
  def __init__(self):
    java.awt.dnd.DropTargetAdapter.__init__(self)

  def drop(self, evt):
    if not evt.transferable.isDataFlavorSupported(java.awt.datatransfer.DataFlavor.javaFileListFlavor):
      return
    evt.acceptDrop(-1)
    names = evt.transferable.getTransferData(java.awt.datatransfer.DataFlavor.javaFileListFlavor)
    OnDropFiles(names)

def decorate(frame):
  global pane
  frame.setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE)
  frame.title = "Jython - Drophash"
  frame.layout = java.awt.BorderLayout()

  pane = javax.swing.JLabel()
  pane.border = javax.swing.BorderFactory.createEmptyBorder(5,5,5,5)
  frame.contentPane.add(javax.swing.JScrollPane(pane), java.awt.BorderLayout.CENTER)
  pane.text = "<html>"
  icon = java.awt.Toolkit.getDefaultToolkit().createImage("drophash.png")
  frame.setIconImage(icon)
  target = java.awt.dnd.DropTarget(pane, dropHandler())
  
  
  width = 800
  height = 600
  frame.setSize(width, height);
  screenDim = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
  frame.setLocation(
        (screenDim.width - width) / 2,
        (screenDim.height - height) / 2
        )
  



if __name__ == "__main__":
  frame = javax.swing.JFrame()
  decorate(frame)
  frame.visible = True

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