Veronica Berglyd Olsen
466 lines
14 KiB
Python
466 lines
14 KiB
Python
"""
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novelWriter – Project Tree Class
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================================
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Data class for the project's tree of project items
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File History:
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Created: 2020-05-07 [0.4.5]
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This file is a part of novelWriter
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Copyright 2018–2022, Veronica Berglyd Olsen
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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"""
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import random
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import logging
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from pathlib import Path
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from novelwriter.enum import nwItemClass, nwItemLayout
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from novelwriter.error import logException
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from novelwriter.common import checkHandle
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from novelwriter.constants import nwFiles
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from novelwriter.core.item import NWItem
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logger = logging.getLogger(__name__)
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class NWTree:
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MAX_DEPTH = 1000 # Cap of tree traversing for loops
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def __init__(self, theProject):
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self.theProject = theProject
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self._projTree = {} # Holds all the items of the project
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self._treeOrder = [] # The order of the tree items on the tree view
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self._treeRoots = {} # The root items of the tree
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self._trashRoot = None # The handle of the trash root folder
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self._archRoot = None # The handle of the archive root folder
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self._theIndex = 0 # The current iterator index
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self._treeChanged = False # True if tree structure has changed
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return
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##
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# Class Methods
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##
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def clear(self):
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"""Clear the item tree entirely.
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"""
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self._projTree = {}
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self._treeOrder = []
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self._treeRoots = {}
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self._trashRoot = None
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self._archRoot = None
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self._theIndex = 0
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self._treeChanged = False
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return
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def handles(self):
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"""Returns a copy of the list of all the active handles.
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"""
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return self._treeOrder.copy()
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def append(self, tHandle, pHandle, nwItem):
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"""Add a new item to the end of the tree.
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"""
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tHandle = checkHandle(tHandle, None, True)
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pHandle = checkHandle(pHandle, None, True)
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if tHandle is None:
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tHandle = self._makeHandle()
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if tHandle in self._projTree:
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logger.warning("Duplicate handle '%s' detected, skipping", tHandle)
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return False
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logger.debug("Adding item '%s' with parent '%s'", str(tHandle), str(pHandle))
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nwItem.setHandle(tHandle)
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nwItem.setParent(pHandle)
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if nwItem.isRootType():
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logger.debug("Item '%s' is a root item", str(tHandle))
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self._treeRoots[tHandle] = nwItem
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if nwItem.itemClass == nwItemClass.ARCHIVE:
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logger.debug("Item '%s' is the archive folder", str(tHandle))
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self._archRoot = tHandle
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elif nwItem.itemClass == nwItemClass.TRASH:
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if self._trashRoot is None:
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logger.debug("Item '%s' is the trash folder", str(tHandle))
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self._trashRoot = tHandle
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else:
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logger.error("Only one trash folder allowed")
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return False
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self._projTree[tHandle] = nwItem
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self._treeOrder.append(tHandle)
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self._setTreeChanged(True)
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return True
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def pack(self):
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"""Pack the content of the tree into the provided XML object. In
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the order defined by the _treeOrder list.
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"""
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tree = []
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for tHandle in self._treeOrder:
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tItem = self.__getitem__(tHandle)
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if tItem:
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tree.append(tItem.pack())
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return tree
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def unpack(self, data):
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"""Iterate through all items of a list and add them to the
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project tree.
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"""
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self.clear()
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for item in data:
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nwItem = NWItem(self.theProject)
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if nwItem.unpack(item):
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self.append(nwItem.itemHandle, nwItem.itemParent, nwItem)
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nwItem.saveInitialCount()
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return True
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def writeToCFile(self):
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"""Write the convenience table of contents file in the root of
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the project directory.
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"""
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runtimePath = self.theProject.storage.runtimePath
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contentPath = self.theProject.storage.contentPath
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if not (isinstance(contentPath, Path) and isinstance(runtimePath, Path)):
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return False
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tocList = []
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tocLen = 0
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for tHandle in self._treeOrder:
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tItem = self.__getitem__(tHandle)
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if tItem is None:
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continue
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tFile = tHandle+".nwd"
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if (contentPath / tFile).is_file():
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tocLine = "{0:<25s} {1:<9s} {2:<8s} {3:s}".format(
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str(Path("content") / tFile),
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tItem.itemClass.name,
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tItem.itemLayout.name,
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tItem.itemName,
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)
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tocList.append(tocLine)
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tocLen = max(tocLen, len(tocLine))
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try:
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# Dump the text
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tocText = runtimePath / nwFiles.TOC_TXT
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with open(tocText, mode="w", encoding="utf-8") as outFile:
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outFile.write("\n")
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outFile.write("Table of Contents\n")
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outFile.write("=================\n")
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outFile.write("\n")
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outFile.write("{0:<25s} {1:<9s} {2:<8s} {3:s}\n".format(
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"File Name", "Class", "Layout", "Document Label"
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))
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outFile.write("-"*max(tocLen, 62) + "\n")
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outFile.write("\n".join(tocList))
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outFile.write("\n")
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except Exception:
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logger.error("Could not write ToC file")
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logException()
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return False
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return True
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def sumWords(self):
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"""Loop over all entries and add up the word counts.
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"""
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noteWords = 0
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novelWords = 0
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for tHandle in self._treeOrder:
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tItem = self.__getitem__(tHandle)
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if tItem is None:
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continue
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if tItem.itemLayout == nwItemLayout.NO_LAYOUT:
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pass
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elif tItem.itemLayout == nwItemLayout.NOTE:
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noteWords += tItem.wordCount
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else:
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novelWords += tItem.wordCount
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return novelWords, noteWords
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##
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# Tree Item Methods
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##
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def updateItemData(self, tHandle):
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"""Update the root item handle of a given item. Returns True if
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a root was found and data updated, otherwise False.
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"""
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tItem = self.__getitem__(tHandle)
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if tItem is None:
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return False
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iItem = tItem
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for _ in range(self.MAX_DEPTH):
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if iItem.itemParent is None:
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tItem.setRoot(iItem.itemHandle)
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tItem.setClassDefaults(iItem.itemClass)
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return True
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else:
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iItem = self.__getitem__(iItem.itemParent)
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if iItem is None:
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return False
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else:
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raise RecursionError("Critical internal error")
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def checkType(self, tHandle, itemType):
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"""Return true of item exists and is of the specified item type.
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"""
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tItem = self.__getitem__(tHandle)
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if not tItem:
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return False
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return tItem.itemType == itemType
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def getItemPath(self, tHandle):
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"""Iterate upwards in the tree until we find the item with
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parent None, the root item, and return the list of handles.
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We do this with a for loop with a maximum depth to make
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infinite loops impossible.
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"""
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tTree = []
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tItem = self.__getitem__(tHandle)
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if tItem is not None:
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tTree.append(tHandle)
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for _ in range(self.MAX_DEPTH):
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if tItem.itemParent is None:
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return tTree
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else:
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tHandle = tItem.itemParent
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tItem = self.__getitem__(tHandle)
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if tItem is None:
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return tTree
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else:
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tTree.append(tHandle)
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else:
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raise RecursionError("Critical internal error")
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return tTree
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##
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# Tree Root Methods
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##
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def rootClasses(self):
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"""Return a set of all root classes in use by the project.
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"""
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rootClasses = set()
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for nwItem in self._treeRoots.values():
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rootClasses.add(nwItem.itemClass)
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return rootClasses
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def iterRoots(self, itemClass):
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"""Iterate over all root items of a given class in order.
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"""
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for tHandle in self._treeOrder:
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nwItem = self.__getitem__(tHandle)
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if nwItem is not None and nwItem.isRootType():
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if itemClass is None or nwItem.itemClass == itemClass:
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yield tHandle, nwItem
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return
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def isRoot(self, tHandle):
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"""Check if a handle is a root item.
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"""
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return tHandle in self._treeRoots
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def isTrash(self, tHandle):
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"""Check if an item is in or is the trash folder.
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"""
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tItem = self.__getitem__(tHandle)
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if tItem is None:
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return True
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if tItem.itemClass == nwItemClass.TRASH:
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return True
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if self._trashRoot is not None:
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if tHandle == self._trashRoot:
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return True
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elif tItem.itemParent == self._trashRoot:
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return True
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elif tItem.itemRoot == self._trashRoot:
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return True
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return False
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def trashRoot(self):
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"""Returns the handle of the trash folder, or None if there
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isn't one.
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"""
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if self._trashRoot:
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return self._trashRoot
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return None
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def findRoot(self, theClass):
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"""Find the first root item for a given class.
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"""
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for aRoot in self._treeRoots:
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tItem = self.__getitem__(aRoot)
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if tItem is None:
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continue
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if theClass == tItem.itemClass:
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return tItem.itemHandle
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return None
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##
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# Setters
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##
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def setOrder(self, newOrder):
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"""Reorders the tree based on a list of items.
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"""
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tmpOrder = [tHandle for tHandle in newOrder if tHandle in self._projTree]
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if not (len(tmpOrder) == len(newOrder) == len(self._treeOrder)):
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# Something is wrong, so let's debug it
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for tHandle in newOrder:
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if tHandle not in self._projTree:
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logger.error("Handle '%s' in new tree order is not in old order", tHandle)
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for tHandle in self._treeOrder:
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if tHandle not in tmpOrder:
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logger.warning("Handle '%s' in old tree order is not in new order", tHandle)
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# Save the temp list
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self._treeOrder = tmpOrder
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self._setTreeChanged(True)
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logger.debug("Project tree order updated")
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return
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def setFileItemLayout(self, tHandle, itemLayout):
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"""Set the nwItemLayout for a specific file.
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"""
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tItem = self.__getitem__(tHandle)
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if tItem is None:
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return False
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if not tItem.isFileType():
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logger.error("Item '%s' is not a file", tHandle)
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return False
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if not isinstance(itemLayout, nwItemLayout):
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return False
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tItem.setLayout(itemLayout)
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return True
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##
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# Meta Methods
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##
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def __len__(self):
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"""Return the length counter. Does not check that it is correct!
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"""
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return len(self._treeOrder)
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def __bool__(self):
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"""Returns True if the tree has any entries.
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"""
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return len(self._treeOrder) > 0
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##
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# Item Access Methods
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##
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def __getitem__(self, tHandle):
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"""Return a project item based on its handle. Returns None if
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the handle doesn't exist in the project.
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"""
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if tHandle in self._projTree:
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return self._projTree[tHandle]
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logger.error("No tree item with handle '%s'", str(tHandle))
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return None
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def __delitem__(self, tHandle):
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"""Remove an item from the internal lists and dictionaries.
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"""
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if tHandle in self._treeOrder and tHandle in self._projTree:
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self._treeOrder.remove(tHandle)
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del self._projTree[tHandle]
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else:
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logger.warning("Failed to delete item '%s': item not found", tHandle)
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return
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if tHandle in self._treeRoots:
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del self._treeRoots[tHandle]
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if tHandle == self._trashRoot:
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self._trashRoot = None
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if tHandle == self._archRoot:
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self._archRoot = None
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self._setTreeChanged(True)
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return
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def __contains__(self, tHandle):
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"""Checks if a handle exists in the tree.
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"""
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return tHandle in self._treeOrder
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##
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# Iterator Methods
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##
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def __iter__(self):
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"""Initiates the iterator.
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"""
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self._theIndex = 0
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return self
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def __next__(self):
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"""Returns the item from the next entry in the _treeOrder list.
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"""
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if self._theIndex < len(self._treeOrder):
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theItem = self.__getitem__(self._treeOrder[self._theIndex])
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self._theIndex += 1
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return theItem
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else:
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raise StopIteration
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##
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# Internal Functions
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##
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def _setTreeChanged(self, theState):
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"""Set the changed flag to theState, and if being set to True,
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propagate that state change to the parent NWProject class.
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"""
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self._treeChanged = theState
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if theState:
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self.theProject.setProjectChanged(True)
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return
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def _makeHandle(self):
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"""Generate a unique item handle. In the event that the key
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already exists, generate a new one.
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"""
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logger.debug("Generating new handle")
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handle = f"{random.getrandbits(52):013x}"
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if handle in self._projTree:
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logger.warning("Duplicate handle encountered! Retrying ...")
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handle = self._makeHandle()
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return handle
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# END Class NWTree
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