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# help.py - help utilities for PythonWin.
import win32api
import win32con
import win32ui
import string
import sys
import regutil
import string, os
htmlhelp_handle = None
html_help_command_translators = {
win32con.HELP_CONTENTS : 1, # HH_DISPLAY_TOC
win32con.HELP_CONTEXT : 15, # HH_HELP_CONTEXT
win32con.HELP_FINDER : 1, # HH_DISPLAY_TOC
}
def FinalizeHelp():
global htmlhelp_handle
if htmlhelp_handle is not None:
import win32help
try:
#frame = win32ui.GetMainFrame().GetSafeHwnd()
frame = 0
win32help.HtmlHelp(frame, None, win32help.HH_UNINITIALIZE, htmlhelp_handle)
except win32help.error:
print("Failed to finalize htmlhelp!")
htmlhelp_handle = None
def OpenHelpFile(fileName, helpCmd = None, helpArg = None):
"Open a help file, given a full path"
# default help arg.
win32ui.DoWaitCursor(1)
try:
if helpCmd is None: helpCmd = win32con.HELP_CONTENTS
ext = os.path.splitext(fileName)[1].lower()
if ext == ".hlp":
win32api.WinHelp( win32ui.GetMainFrame().GetSafeHwnd(), fileName, helpCmd, helpArg)
# XXX - using the htmlhelp API wreaks havoc with keyboard shortcuts
# so we disable it, forcing ShellExecute, which works fine (but
# doesn't close the help file when Pythonwin is closed.
# Tom Heller also points out http://www.microsoft.com/mind/0499/faq/faq0499.asp,
# which may or may not be related.
elif 0 and ext == ".chm":
import win32help
global htmlhelp_handle
helpCmd = html_help_command_translators.get(helpCmd, helpCmd)
#frame = win32ui.GetMainFrame().GetSafeHwnd()
frame = 0 # Dont want it overlapping ours!
if htmlhelp_handle is None:
htmlhelp_hwnd, htmlhelp_handle = win32help.HtmlHelp(frame, None, win32help.HH_INITIALIZE)
win32help.HtmlHelp(frame, fileName, helpCmd, helpArg)
else:
# Hope that the extension is registered, and we know what to do!
win32api.ShellExecute(0, "open", fileName, None, "", win32con.SW_SHOW)
return fileName
finally:
win32ui.DoWaitCursor(-1)
def ListAllHelpFiles():
ret = []
ret = _ListAllHelpFilesInRoot(win32con.HKEY_LOCAL_MACHINE)
# Ensure we don't get dups.
for item in _ListAllHelpFilesInRoot(win32con.HKEY_CURRENT_USER):
if item not in ret:
ret.append(item)
return ret
def _ListAllHelpFilesInRoot(root):
"""Returns a list of (helpDesc, helpFname) for all registered help files
"""
import regutil
retList = []
try:
key = win32api.RegOpenKey(root, regutil.BuildDefaultPythonKey() + "\\Help", 0, win32con.KEY_READ)
except win32api.error as exc:
import winerror
if exc.winerror!=winerror.ERROR_FILE_NOT_FOUND:
raise
return retList
try:
keyNo = 0
while 1:
try:
helpDesc = win32api.RegEnumKey(key, keyNo)
helpFile = win32api.RegQueryValue(key, helpDesc)
retList.append((helpDesc, helpFile))
keyNo = keyNo + 1
except win32api.error as exc:
import winerror
if exc.winerror!=winerror.ERROR_NO_MORE_ITEMS:
raise
break
finally:
win32api.RegCloseKey(key)
return retList
def SelectAndRunHelpFile():
from pywin.dialogs import list
helpFiles = ListAllHelpFiles()
if len(helpFiles)==1:
# only 1 help file registered - probably ours - no point asking
index = 0
else:
index = list.SelectFromLists("Select Help file", helpFiles, ["Title"])
if index is not None:
OpenHelpFile(helpFiles[index][1])
helpIDMap = None
def SetHelpMenuOtherHelp(mainMenu):
"""Modifies the main Help Menu to handle all registered help files.
mainMenu -- The main menu to modify - usually from docTemplate.GetSharedMenu()
"""
# Load all help files from the registry.
global helpIDMap
if helpIDMap is None:
helpIDMap = {}
cmdID = win32ui.ID_HELP_OTHER
excludeList = ['Main Python Documentation', 'Pythonwin Reference']
firstList = ListAllHelpFiles()
# We actually want to not only exclude these entries, but
# their help file names (as many entries may share the same name)
excludeFnames = []
for desc, fname in firstList:
if desc in excludeList:
excludeFnames.append(fname)
helpDescs = []
for desc, fname in firstList:
if fname not in excludeFnames:
helpIDMap[cmdID] = (desc, fname)
win32ui.GetMainFrame().HookCommand(HandleHelpOtherCommand, cmdID)
cmdID = cmdID + 1
helpMenu = mainMenu.GetSubMenu(mainMenu.GetMenuItemCount()-1) # Help menu always last.
otherHelpMenuPos = 2 # cant search for ID, as sub-menu has no ID.
otherMenu = helpMenu.GetSubMenu(otherHelpMenuPos)
while otherMenu.GetMenuItemCount():
otherMenu.DeleteMenu(0, win32con.MF_BYPOSITION)
if helpIDMap:
for id, (desc, fname) in helpIDMap.items():
otherMenu.AppendMenu(win32con.MF_ENABLED|win32con.MF_STRING,id, desc)
else:
helpMenu.EnableMenuItem(otherHelpMenuPos, win32con.MF_BYPOSITION | win32con.MF_GRAYED)
def HandleHelpOtherCommand(cmd, code):
OpenHelpFile(helpIDMap[cmd][1])