"""Class browser.

XXX TO DO:

- reparse when source changed (maybe just a button would be OK?)

    (or recheck on window popup)

- add popup menu with more options (e.g. doc strings, base classes, imports)

- show function argument list? (have to do pattern matching on source)

- should the classes and methods lists also be in the module's menu bar?

- add base classes to class browser tree

"""

import os

import sys

import pyclbr

import PyShell

from WindowList import ListedToplevel

from TreeWidget import TreeNode, TreeItem, ScrolledCanvas

from configHandler import idleConf

class ClassBrowser:

    def __init__(self, flist, name, path):

        # XXX This API should change, if the file doesn't end in ".py"

        # XXX the code here is bogus!

        self.name = name

        self.file = os.path.join(path[0], self.name + ".py")

        self.init(flist)

    def close(self, event=None):

        self.top.destroy()

        self.node.destroy()

    def init(self, flist):

        self.flist = flist

        # reset pyclbr

        pyclbr._modules.clear()

        # create top

        self.top = top = ListedToplevel(flist.root)

        top.protocol("WM_DELETE_WINDOW", self.close)

        top.bind("<Escape>", self.close)

        self.settitle()

        top.focus_set()

        # create scrolled canvas

        theme = idleConf.GetOption('main','Theme','name')

        background = idleConf.GetHighlight(theme, 'normal')['background']

        sc = ScrolledCanvas(top, bg=background, highlightthickness=0, takefocus=1)

        sc.frame.pack(expand=1, fill="both")

        item = self.rootnode()

        self.node = node = TreeNode(sc.canvas, None, item)

        node.update()

        node.expand()

    def settitle(self):

        self.top.wm_title("Class Browser - " + self.name)

        self.top.wm_iconname("Class Browser")

    def rootnode(self):

        return ModuleBrowserTreeItem(self.file)

class ModuleBrowserTreeItem(TreeItem):

    def __init__(self, file):

        self.file = file

    def GetText(self):

        return os.path.basename(self.file)

    def GetIconName(self):

        return "python"

    def GetSubList(self):

        sublist = []

        for name in self.listclasses():

            item = ClassBrowserTreeItem(name, self.classes, self.file)

            sublist.append(item)

        return sublist

    def OnDoubleClick(self):

        if os.path.normcase(self.file[-3:]) != ".py":

            return

        if not os.path.exists(self.file):

            return

        PyShell.flist.open(self.file)

    def IsExpandable(self):

        return os.path.normcase(self.file[-3:]) == ".py"

    def listclasses(self):

        dir, file = os.path.split(self.file)

        name, ext = os.path.splitext(file)

        if os.path.normcase(ext) != ".py":

            return []

        try:

            dict = pyclbr.readmodule_ex(name, [dir] + sys.path)

        except ImportError, msg:

            return []

        items = []

        self.classes = {}

        for key, cl in dict.items():

            if cl.module == name:

                s = key

                if hasattr(cl, 'super') and cl.super:

                    supers = []

                    for sup in cl.super:

                        if type(sup) is type(''):

                            sname = sup

                        else:

                            sname = sup.name

                            if sup.module != cl.module:

                                sname = "%s.%s" % (sup.module, sname)

                        supers.append(sname)

                    s = s + "(%s)" % ", ".join(supers)

                items.append((cl.lineno, s))

                self.classes[s] = cl

        items.sort()

        list = []

        for item, s in items:

            list.append(s)

        return list

class ClassBrowserTreeItem(TreeItem):

    def __init__(self, name, classes, file):

        self.name = name

        self.classes = classes

        self.file = file

        try:

            self.cl = self.classes[self.name]

        except (IndexError, KeyError):

            self.cl = None

        self.isfunction = isinstance(self.cl, pyclbr.Function)

    def GetText(self):

        if self.isfunction:

            return "def " + self.name + "(...)"

        else:

            return "class " + self.name

    def GetIconName(self):

        if self.isfunction:

            return "python"

        else:

            return "folder"

    def IsExpandable(self):

        if self.cl:

            try:

                return not not self.cl.methods

            except AttributeError:

                return False

    def GetSubList(self):

        if not self.cl:

            return []

        sublist = []

        for name in self.listmethods():

            item = MethodBrowserTreeItem(name, self.cl, self.file)

            sublist.append(item)

        return sublist

    def OnDoubleClick(self):

        if not os.path.exists(self.file):

            return

        edit = PyShell.flist.open(self.file)

        if hasattr(self.cl, 'lineno'):

            lineno = self.cl.lineno

            edit.gotoline(lineno)

    def listmethods(self):

        if not self.cl:

            return []

        items = []

        for name, lineno in self.cl.methods.items():

            items.append((lineno, name))

        items.sort()

        list = []

        for item, name in items:

            list.append(name)

        return list

class MethodBrowserTreeItem(TreeItem):

    def __init__(self, name, cl, file):

        self.name = name

        self.cl = cl

        self.file = file

    def GetText(self):

        return "def " + self.name + "(...)"

    def GetIconName(self):

        return "python" # XXX

    def IsExpandable(self):

        return 0

    def OnDoubleClick(self):

        if not os.path.exists(self.file):

            return

        edit = PyShell.flist.open(self.file)

        edit.gotoline(self.cl.methods[self.name])

def main():

    try:

        file = __file__

    except NameError:

        file = sys.argv[0]

        if sys.argv[1:]:

            file = sys.argv[1]

        else:

            file = sys.argv[0]

    dir, file = os.path.split(file)

    name = os.path.splitext(file)[0]

    ClassBrowser(PyShell.flist, name, [dir])

    if sys.stdin is sys.__stdin__:

        mainloop()

if __name__ == "__main__":

    main()