testbed/lark-parser__lark/docs/ide/app/utils.py

# -*- coding: utf-8 -*-
from . import core as html5

def unescape(val, maxLength = 0):
	"""
		Unquotes several HTML-quoted characters in a string.

		:param val: The value to be unescaped.
		:type val: str

		:param maxLength: Cut-off after maxLength characters.
				A value of 0 means "unlimited". (default)
		:type maxLength: int

		:returns: The unquoted string.
		:rtype: str
	"""
	val = val \
			.replace("&lt;", "<") \
			.replace("&gt;", ">") \
			.replace("&quot;", "\"") \
			.replace("&#39;", "'")

	if maxLength > 0:
		return val[0:maxLength]

	return val

def doesEventHitWidgetOrParents(event, widget):
	"""
		Test if event 'event' hits widget 'widget' (or *any* of its parents)
	"""
	while widget:
		if event.target == widget.element:
			return widget

		widget = widget.parent()

	return None

def doesEventHitWidgetOrChildren(event, widget):
	"""
		Test if event 'event' hits widget 'widget' (or *any* of its children)
	"""
	if event.target == widget.element:
		return widget

	for child in widget.children():
		if doesEventHitWidgetOrChildren(event, child):
			return child

	return None

def textToHtml(node, text):
	"""
	Generates html nodes from text by splitting text into content and into
	line breaks html5.Br.

	:param node: The node where the nodes are appended to.
	:param text: The text to be inserted.
	"""

	for (i, part) in enumerate(text.split("\n")):
		if i > 0:
			node.appendChild(html5.Br())

		node.appendChild(html5.TextNode(part))

def parseInt(s, ret = 0):
	"""
	Parses a value as int
	"""
	if not isinstance(s, str):
		return int(s)
	elif s:
		if s[0] in "+-":
			ts = s[1:]
		else:
			ts = s

		if ts and all([_ in "0123456789" for _ in ts]):
			return int(s)

	return ret

def parseFloat(s, ret = 0.0):
	"""
	Parses a value as float.
	"""
	if not isinstance(s, str):
		return float(s)
	elif s:
		if s[0] in "+-":
			ts = s[1:]
		else:
			ts = s

		if ts and ts.count(".") <= 1 and all([_ in ".0123456789" for _ in ts]):
			return float(s)

	return ret