import ide;
import ghs_ideobject;
import ghs_constants;
import ghs_winreg;
from ghs_util import *;

class GHS_DiffView(ghs_ideobject.GHS_IdeObject):
    """ Describe information for MULTI Diffview. """
    #
    # Initialize object.
    #
    # GHS: Validated 
    #
    def __init__(self, workingDir=""):
	ghs_ideobject.GHS_IdeObject.__init__(self, "DiffView",
					     workingDir);
	self.service = GHS_GetGeneralService(self.serviceName,
					    "MULTI Diff View",
					    workingDir);
    #
    # Open the window to choose files to view differences.
    #
    # Return an object of GHS_Window for the window which is for you to choose
    # two files to diff.
    #
    # GHS: Validated 
    #
    def OpenChooseWindow(self, fileName1="", fileName2="", reuse=True):
	if not self.service:
	    print("MULTI DiffView service is not started up.");
	    return None;

	winreg = ghs_misc.GetGlobal("winreg");
	if not winreg:
	    winreg = ghs_winreg.GHS_WindowRegister();
	    ghs_misc.SetGlobal("winreg", winreg);

	oldWinList = winreg.GetWindowList(False);
	self.service.ChooseNewDiff(fileName1, fileName2, reuse, 0);
	obj = winreg.WaitForWindow(oldWinList,
				   self.maxSecToWaitForNewWindow);
	return obj;
    # Define some aliases for the function
    openchoosewindow = OpenChooseWindow;
    OpenChooseWin = OpenChooseWindow;
    openchoosewin = OpenChooseWindow;
    #
    # Diff files.
    #
    # Return an object of GHS_DiffViewWindow when "reuse" is False.
    #
    # GHS: Validated 
    #
    def DiffFiles(self, fileName1, fileName2, reuse=False, append=False):
	if not self.service:
	    print("MULTI DiffView service is not started up.");
	    return None;
	self.CleanCmdExecVariables();
	if not fileName1 or not fileName2:
	    self.OpenChooseWindow(fileName1, fileName2, reuse);
	    return None;

	winreg = ghs_misc.GetGlobal("winreg");
	if not winreg:
	    winreg = ghs_winreg.GHS_WindowRegister();
	    ghs_misc.SetGlobal("winreg", winreg);

	oldWinList = winreg.GetWindowList(False);
	# First argument is the command, so fileName1 must be quoted in case it
	# contains spaces in the path.
	self.cmdExecOutput = self.service.CreateNewDiff(GHS_QuotifyString(fileName1),
							fileName2,
							reuse,
							append);
	if self.cmdExecOutput:
	    print("%s" % self.cmdExecOutput);
	    return None;
	if reuse:
	    # Without changing the diffview's code, we have no idea which
	    # diffview window is reused, so don't try to wait for a new
	    # diffview window to showup.
	    obj = None;
	else:
	    winreg = ghs_misc.GetGlobal("winreg");
	    if not winreg:
		winreg = ghs_winreg.GHS_WindowRegister();
		ghs_misc.SetGlobal("winreg", winreg);

	    obj = winreg.WaitForWindowFromClass(oldWinList,
			  self.maxSecToWaitForNewWindow,
			  getattr(ghs_constants.winClassNames, "diffview", ""),
			  "");
	    if not obj:
		print("Did not see MULTI DiffView window.");
	return obj;
    # Define some aliases for the function
    difffiles = DiffFiles;


    ##########################################################################
    #
    # More APIs......
    #
    ##########################################################################

# Define an object for the class.
ghs_diffview = GHS_DiffView;