evennia/lib/utils/evtable.py

1335 lines
55 KiB
Python

"""
EvTable
This is an advanced ASCII table creator. It was inspired
by prettytable but shares no code.
Note: to test ANSI colors on the command line you need to
call the printed table in a unicode() call, like print unicode(table).
This is due to a bug in the python interpreter and print.
Example usage:
table = EvTable("Heading1", "Heading2", table=[[1,2,3],[4,5,6],[7,8,9]], border="cells")
table.add_column("This is long data", "This is even longer data")
table.add_row("This is a single row")
print table
Result:
+----------------------+----------+---+--------------------------+
| Heading1 | Heading2 | | |
+~~~~~~~~~~~~~~~~~~~~~~+~~~~~~~~~~+~~~+~~~~~~~~~~~~~~~~~~~~~~~~~~+
| 1 | 4 | 7 | This is long data |
+----------------------+----------+---+--------------------------+
| 2 | 5 | 8 | This is even longer data |
+----------------------+----------+---+--------------------------+
| 3 | 6 | 9 | |
+----------------------+----------+---+--------------------------+
| This is a single row | | | |
+----------------------+----------+---+--------------------------+
As seen, the table will automatically expand with empty cells to make
the table symmetric.
Tables can be restricted to a given width.
table.reformat(width=50, align="l")
(We could just have added these keywords to the table creation call)
This yields the following result:
+-----------+------------+-----------+-----------+
| Heading1 | Heading2 | | |
+~~~~~~~~~~~+~~~~~~~~~~~~+~~~~~~~~~~~+~~~~~~~~~~~+
| 1 | 4 | 7 | This is |
| | | | long data |
+-----------+------------+-----------+-----------+
| | | | This is |
| 2 | 5 | 8 | even |
| | | | longer |
| | | | data |
+-----------+------------+-----------+-----------+
| 3 | 6 | 9 | |
+-----------+------------+-----------+-----------+
| This is a | | | |
| single | | | |
| row | | | |
+-----------+------------+-----------+-----------+
Table-columns can be individually formatted. Note that if an
individual column is set with a specific width, table auto-balancing
will not affect this column (this may lead to the full table being too
wide, so be careful mixing fixed-width columns with auto- balancing).
Here we change the width and alignment of the column at index 3
(Python starts from 0):
table.reformat_column(3, width=30, align="r")
print table
+-----------+-------+-----+-----------------------------+---------+
| Heading1 | Headi | | | |
| | ng2 | | | |
+~~~~~~~~~~~+~~~~~~~+~~~~~+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+~~~~~~~~~+
| 1 | 4 | 7 | This is long data | Test1 |
+-----------+-------+-----+-----------------------------+---------+
| 2 | 5 | 8 | This is even longer data | Test3 |
+-----------+-------+-----+-----------------------------+---------+
| 3 | 6 | 9 | | Test4 |
+-----------+-------+-----+-----------------------------+---------+
| This is a | | | | |
| single | | | | |
| row | | | | |
+-----------+-------+-----+-----------------------------+---------+
When adding new rows/columns their data can have its own alignments
(left/center/right, top/center/bottom).
If the height is restricted, cells will be restricted from expanding
vertically. This will lead to text contents being cropped. Each cell
can only shrink to a minimum width and height of 1.
EvTable is intended to be used with ANSIString for supporting
ANSI-coloured string types.
When a cell is auto-wrapped across multiple lines, ANSI-reset
sequences will be put at the end of each wrapped line. This means that
the colour of a wrapped cell will not "bleed", but it also means that
eventual colour outside
"""
#from textwrap import wrap
from textwrap import TextWrapper
from copy import deepcopy, copy
from src.utils.utils import to_unicode
from src.utils.ansi import ANSIString
def make_iter(obj):
"Makes sure that the object is always iterable."
return not hasattr(obj, '__iter__') and [obj] or obj
def _to_ansi(obj):
"convert to ANSIString"
if hasattr(obj, "__iter__"):
return [_to_ansi(o) for o in obj]
else:
return ANSIString(to_unicode(obj))
_unicode = unicode
_whitespace = '\t\n\x0b\x0c\r '
class ANSITextWrapper(TextWrapper):
def _munge_whitespace(self, text):
"""_munge_whitespace(text : string) -> string
Munge whitespace in text: expand tabs and convert all other
whitespace characters to spaces. Eg. " foo\tbar\n\nbaz"
becomes " foo bar baz".
"""
# ignore expand_tabs/replace_whitespace until ANSISTring handles them
return text
if self.expand_tabs:
text = text.expandtabs()
if self.replace_whitespace:
if isinstance(text, str):
text = text.translate(self.whitespace_trans)
elif isinstance(text, _unicode):
text = text.translate(self.unicode_whitespace_trans)
return text
def _split(self, text):
"""_split(text : string) -> [string]
Split the text to wrap into indivisible chunks. Chunks are
not quite the same as words; see _wrap_chunks() for full
details. As an example, the text
Look, goof-ball -- use the -b option!
breaks into the following chunks:
'Look,', ' ', 'goof-', 'ball', ' ', '--', ' ',
'use', ' ', 'the', ' ', '-b', ' ', 'option!'
if break_on_hyphens is True, or in:
'Look,', ' ', 'goof-ball', ' ', '--', ' ',
'use', ' ', 'the', ' ', '-b', ' ', option!'
otherwise.
"""
# only use unicode wrapper
if self.break_on_hyphens:
pat = self.wordsep_re_uni
else:
pat = self.wordsep_simple_re_uni
chunks = pat.split(_to_ansi(text))
chunks = filter(None, chunks) # remove empty chunks
return chunks
def _wrap_chunks(self, chunks):
"""_wrap_chunks(chunks : [string]) -> [string]
Wrap a sequence of text chunks and return a list of lines of
length 'self.width' or less. (If 'break_long_words' is false,
some lines may be longer than this.) Chunks correspond roughly
to words and the whitespace between them: each chunk is
indivisible (modulo 'break_long_words'), but a line break can
come between any two chunks. Chunks should not have internal
whitespace; ie. a chunk is either all whitespace or a "word".
Whitespace chunks will be removed from the beginning and end of
lines, but apart from that whitespace is preserved.
"""
lines = []
if self.width <= 0:
raise ValueError("invalid width %r (must be > 0)" % self.width)
# Arrange in reverse order so items can be efficiently popped
# from a stack of chucks.
chunks.reverse()
while chunks:
# Start the list of chunks that will make up the current line.
# cur_len is just the length of all the chunks in cur_line.
cur_line = []
cur_len = 0
# Figure out which static string will prefix this line.
if lines:
indent = self.subsequent_indent
else:
indent = self.initial_indent
# Maximum width for this line.
width = self.width - len(indent)
# First chunk on line is whitespace -- drop it, unless this
# is the very beginning of the text (ie. no lines started yet).
if self.drop_whitespace and chunks[-1].strip() == '' and lines:
del chunks[-1]
while chunks:
l = len(chunks[-1])
# Can at least squeeze this chunk onto the current line.
if cur_len + l <= width:
cur_line.append(chunks.pop())
cur_len += l
# Nope, this line is full.
else:
break
# The current line is full, and the next chunk is too big to
# fit on *any* line (not just this one).
if chunks and len(chunks[-1]) > width:
self._handle_long_word(chunks, cur_line, cur_len, width)
# If the last chunk on this line is all whitespace, drop it.
if self.drop_whitespace and cur_line and cur_line[-1].strip() == '':
del cur_line[-1]
# Convert current line back to a string and store it in list
# of all lines (return value).
if cur_line:
l = ""
for w in cur_line: # ANSI fix
l += w #
lines.append(indent + l)
return lines
# -- Convenience interface ---------------------------------------------
def wrap(text, width=70, **kwargs):
"""Wrap a single paragraph of text, returning a list of wrapped lines.
Reformat the single paragraph in 'text' so it fits in lines of no
more than 'width' columns, and return a list of wrapped lines. By
default, tabs in 'text' are expanded with string.expandtabs(), and
all other whitespace characters (including newline) are converted to
space. See TextWrapper class for available keyword args to customize
wrapping behaviour.
"""
w = ANSITextWrapper(width=width, **kwargs)
return w.wrap(text)
def fill(text, width=70, **kwargs):
"""Fill a single paragraph of text, returning a new string.
Reformat the single paragraph in 'text' to fit in lines of no more
than 'width' columns, and return a new string containing the entire
wrapped paragraph. As with wrap(), tabs are expanded and other
whitespace characters converted to space. See TextWrapper class for
available keyword args to customize wrapping behaviour.
"""
w = ANSITextWrapper(width=width, **kwargs)
return w.fill(text)
# EvCell class (see further down for the EvTable itself)
class EvCell(object):
"""
Holds a single data cell for the table. A cell has a certain width
and height and contains one or more lines of data. It can shrink
and resize as needed.
"""
def __init__(self, data, **kwargs):
"""
data - the un-padded data of the entry.
kwargs:
width - desired width of cell. It will pad
to this size.
height - desired height of cell. it will pad
to this size
pad_width - general padding width. This can be overruled
by individual settings below
pad_left - number of extra pad characters on the left
pad_right - extra pad characters on the right
pad_top - extra pad lines top (will pad with vpad_char)
pad_bottom - extra pad lines bottom (will pad with vpad_char)
pad_char - pad character to use for padding. This is overruled
by individual settings below (default " ")
hpad_char - pad character to use both for extra horizontal
padding (default " ")
vpad_char - pad character to use for extra vertical padding
and for vertical fill (default " ")
fill_char - character used to filling (expanding cells to
desired size). This can be overruled by individual
settings below.
hfill_char - character used for horizontal fill (default " ")
vfill_char - character used for vertical fill (default " ")
align - "l", "r" or "c", default is left-aligned
valign - "t", "b" or "c", default is centered
border_width -general border width. This is overruled
- by individual settings below.
border_left - left border width
border_right - right border width
border_top - top border width
border_bottom - bottom border width
border_char - this will use a single border char for all borders.
overruled by individual settings below
border_left_char - char used for left border
border_right_char - char used for right border
border_top_char - char used for top border
border_bottom_char - char user for bottom border
corner_char - character used when two borders cross.
(default is ""). This is overruled by
individual settings below.
corner_top_left_char - char used for "nw" corner
corner_top_right_char - char used for "nw" corner
corner_bottom_left_char - char used for "sw" corner
corner_bottom_right_char - char used for "se" corner
crop_string - string to use when cropping sideways,
default is '[...]'
crop - crop content of cell rather than expand vertically,
default=False
enforce_size - if true, the width/height of the
cell is strictly enforced and
extra text will be cropped rather
than the cell growing vertically.
"""
self.formatted = None
padwidth = kwargs.get("pad_width", None)
padwidth = int(padwidth) if padwidth is not None else None
self.pad_left = int(kwargs.get("pad_left", padwidth if padwidth is not None else 1))
self.pad_right = int(kwargs.get("pad_right", padwidth if padwidth is not None else 1))
self.pad_top = int( kwargs.get("pad_top", padwidth if padwidth is not None else 0))
self.pad_bottom = int(kwargs.get("pad_bottom", padwidth if padwidth is not None else 0))
self.enforce_size = kwargs.get("enforce_size", False)
# avoid multi-char pad_chars messing up counting
pad_char = kwargs.get("pad_char", " ")
pad_char = pad_char[0] if pad_char else " "
hpad_char = kwargs.get("hpad_char", pad_char)
self.hpad_char = hpad_char[0] if hpad_char else pad_char
vpad_char = kwargs.get("vpad_char", pad_char)
self.vpad_char = vpad_char[0] if vpad_char else pad_char
fill_char = kwargs.get("fill_char", " ")
fill_char = fill_char[0] if fill_char else " "
hfill_char = kwargs.get("hfill_char", fill_char)
self.hfill_char = hfill_char[0] if hfill_char else " "
vfill_char = kwargs.get("vfill_char", fill_char)
self.vfill_char = vfill_char[0] if vfill_char else " "
self.crop_string = kwargs.get("crop_string", "[...]")
# borders and corners
borderwidth = kwargs.get("border_width", 0)
self.border_left = kwargs.get("border_left", borderwidth)
self.border_right = kwargs.get("border_right", borderwidth)
self.border_top = kwargs.get("border_top", borderwidth)
self.border_bottom = kwargs.get("border_bottom", borderwidth)
borderchar = kwargs.get("border_char", None)
self.border_left_char = kwargs.get("border_left_char", borderchar if borderchar else "|")
self.border_right_char = kwargs.get("border_right_char", borderchar if borderchar else "|")
self.border_top_char = kwargs.get("border_topchar", borderchar if borderchar else "-")
self.border_bottom_char = kwargs.get("border_bottom_char", borderchar if borderchar else "-")
corner_char = kwargs.get("corner_char", "+")
self.corner_top_left_char = kwargs.get("corner_top_left_char", corner_char)
self.corner_top_right_char = kwargs.get("corner_top_right_char", corner_char)
self.corner_bottom_left_char = kwargs.get("corner_bottom_left_char", corner_char)
self.corner_bottom_right_char = kwargs.get("corner_bottom_right_char", corner_char)
# alignments
self.align = kwargs.get("align", "l")
self.valign = kwargs.get("valign", "c")
#self.data = self._split_lines(unicode(data))
self.data = self._split_lines(_to_ansi(data))
self.raw_width = max(len(line) for line in self.data)
self.raw_height = len(self.data)
# this is extra trimming required for cels in the middle of a table only
self.trim_horizontal = 0
self.trim_vertical = 0
# width/height is given without left/right or top/bottom padding
if "width" in kwargs:
width = kwargs.pop("width")
self.width = width - self.pad_left - self.pad_right - self.border_left - self.border_right
if self.width <= 0:
raise Exception("Cell width too small - no space for data.")
else:
self.width = self.raw_width
if "height" in kwargs:
height = kwargs.pop("height")
self.height = height - self.pad_top - self.pad_bottom - self.border_top - self.border_bottom
if self.height <= 0:
raise Exception("Cell height too small - no space for data.")
else:
self.height = self.raw_height
# prepare data
#self.formatted = self._reformat()
def _crop(self, text, width):
"Apply cropping of text"
if len(text) > width:
crop_string = self.crop_string
return text[:width-len(crop_string)] + crop_string
return text
def _reformat(self):
"Apply formatting"
return self._border(self._pad(self._valign(self._align(self._fit_width(self.data)))))
def _split_lines(self, text):
"Simply split by linebreak"
return text.split("\n")
def _fit_width(self, data):
"""
Split too-long lines to fit the desired width of the Cell.
Note that this also updates raw_width
"""
width = self.width
adjusted_data = []
for line in data:
if 0 < width < len(line):
# replace_whitespace=False, expand_tabs=False is a
# fix for ANSIString not supporting expand_tabs/translate
adjusted_data.extend([ANSIString(part + ANSIString("{n"))
for part in wrap(line, width=width, drop_whitespace=False)])
else:
adjusted_data.append(line)
if self.enforce_size:
# don't allow too high cells
excess = len(adjusted_data) - self.height
if excess > 0:
# too many lines. Crop and mark last line with ...
adjusted_data = adjusted_data[:-excess]
if len(adjusted_data[-1]) > 3:
adjusted_data[-1] = adjusted_data[-1][:-2] + ".."
elif excess < 0:
# too few lines. Fill to height.
adjusted_data.extend(["" for i in xrange(excess)])
return adjusted_data
def _center(self, text, width, pad_char):
"Horizontally center text on line of certain width, using padding"
excess = width - len(text)
if excess <= 0:
return text
if excess % 2:
# uneven padding
narrowside = (excess // 2) * pad_char
widerside = narrowside + pad_char
if width % 2:
return narrowside + text + widerside
else:
return widerside + text + narrowside
else:
# even padding - same on both sides
side = (excess // 2) * pad_char
return side + text + side
def _align(self, data):
"Align list of rows of cell"
align = self.align
if align == "l":
return [line.ljust(self.width, self.hfill_char) for line in data]
elif align == "r":
return [line.rjust(self.width, self.hfill_char) for line in data]
else:
return [self._center(line, self.width, self.hfill_char) for line in data]
def _valign(self, data):
"align cell vertically"
valign = self.valign
height = self.height
cheight = len(data)
excess = height - cheight
padline = self.vfill_char * self.width
if excess <= 0:
return data
# only care if we need to add new lines
if valign == 't':
return data + [padline for i in xrange(excess)]
elif valign == 'b':
return [padline for i in xrange(excess)] + data
else: # center
narrowside = [padline for i in xrange(excess // 2)]
widerside = narrowside + [padline]
if excess % 2:
# uneven padding
if height % 2:
return widerside + data + narrowside
else:
return narrowside + data + widerside
else:
# even padding, same on both sides
return narrowside + data + narrowside
def _pad(self, data):
"Pad data with extra characters on all sides"
left = self.hpad_char * self.pad_left
right = self.hpad_char * self.pad_right
vfill = (self.width + self.pad_left + self.pad_right) * self.vpad_char
top = [vfill for i in xrange(self.pad_top)]
bottom = [vfill for i in xrange(self.pad_bottom)]
return top + [left + line + right for line in data] + bottom
def _border(self, data):
"Add borders to the cell"
left = self.border_left_char * self.border_left
right = self.border_right_char * self.border_right
cwidth = self.width + self.pad_left + self.pad_right + \
max(0,self.border_left-1) + max(0, self.border_right-1)
vfill = self.corner_top_left_char if left else ""
vfill += cwidth * self.border_top_char
vfill += self.corner_top_right_char if right else ""
top = [vfill for i in xrange(self.border_top)]
vfill = self.corner_bottom_left_char if left else ""
vfill += cwidth * self.border_bottom_char
vfill += self.corner_bottom_right_char if right else ""
bottom = [vfill for i in xrange(self.border_bottom)]
return top + [left + line + right for line in data] + bottom
def get_min_height(self):
"""
Get the minimum possible height of cell, including at least
one line for data.
"""
return self.pad_top + self.pad_bottom + self.border_bottom + self.border_top + 1
def get_min_width(self):
"""
Get the minimum possible width of cell, including at least one
character-width for data.
"""
return self.pad_left + self.pad_right + self.border_left + self.border_right + 1
def get_height(self):
"Get natural height of cell, including padding"
return len(self.formatted) #if self.formatted else 0
def get_width(self):
"Get natural width of cell, including padding"
return len(self.formatted[0]) #if self.formatted else 0
def replace_data(self, data, **kwargs):
"""
Replace cell data. This causes a full reformat of the cell.
kwargs - like when creating the cell anew.
"""
#self.data = self._split_lines(unicode(data))
self.data = self._split_lines(_to_ansi(data))
self.raw_width = max(len(line) for line in self.data)
self.raw_height = len(self.data)
self.reformat(**kwargs)
def reformat(self, **kwargs):
"""
Reformat the EvCell with new options
kwargs:
as the class __init__
"""
# keywords that require manipulation
padwidth = kwargs.get("pad_width", None)
padwidth = int(padwidth) if padwidth is not None else None
self.pad_left = int(kwargs.pop("pad_left", padwidth if padwidth is not None else self.pad_left))
self.pad_right = int(kwargs.pop("pad_right", padwidth if padwidth is not None else self.pad_right))
self.pad_top = int( kwargs.pop("pad_top", padwidth if padwidth is not None else self.pad_top))
self.pad_bottom = int(kwargs.pop("pad_bottom", padwidth if padwidth is not None else self.pad_bottom))
self.enforce_size = kwargs.get("enforce_size", False)
pad_char = kwargs.pop("pad_char", None)
hpad_char = kwargs.pop("hpad_char", pad_char)
self.hpad_char = hpad_char[0] if hpad_char else self.hpad_char
vpad_char = kwargs.pop("vpad_char", pad_char)
self.vpad_char = vpad_char[0] if vpad_char else self.vpad_char
fillchar = kwargs.pop("fill_char", None)
hfill_char = kwargs.pop("hfill_char", fillchar)
self.hfill_char = hfill_char[0] if hfill_char else self.hfill_char
vfill_char = kwargs.pop("vfill_char", fillchar)
self.vfill_char = vfill_char[0] if vfill_char else self.vfill_char
borderwidth = kwargs.get("border_width", None)
self.border_left = kwargs.pop("border_left", borderwidth if borderwidth is not None else self.border_left)
self.border_right = kwargs.pop("border_right", borderwidth if borderwidth is not None else self.border_right)
self.border_top = kwargs.pop("border_top", borderwidth if borderwidth is not None else self.border_top)
self.border_bottom = kwargs.pop("border_bottom", borderwidth if borderwidth is not None else self.border_bottom)
borderchar = kwargs.get("border_char", None)
self.border_left_char = kwargs.pop("border_left_char", borderchar if borderchar else self.border_left_char)
self.border_right_char = kwargs.pop("border_right_char", borderchar if borderchar else self.border_right_char)
self.border_top_char = kwargs.pop("border_topchar", borderchar if borderchar else self.border_top_char)
self.border_bottom_char = kwargs.pop("border_bottom_char", borderchar if borderchar else self.border_bottom_char)
corner_char = kwargs.get("corner_char", None)
self.corner_top_left_char = kwargs.pop("corner_top_left", corner_char if corner_char is not None else self.corner_top_left_char)
self.corner_top_right_char = kwargs.pop("corner_top_right", corner_char if corner_char is not None else self.corner_top_right_char)
self.corner_bottom_left_char = kwargs.pop("corner_bottom_left", corner_char if corner_char is not None else self.corner_bottom_left_char)
self.corner_bottom_right_char = kwargs.pop("corner_bottom_right", corner_char if corner_char is not None else self.corner_bottom_right_char)
# this is used by the table to adjust size of cells with borders in the middle
# of the table
self.trim_horizontal = kwargs.pop("trim_horizontal", self.trim_horizontal)
self.trim_vertical = kwargs.pop("trim_vertical", self.trim_vertical)
# fill all other properties
for key, value in kwargs.items():
setattr(self, key, value)
# Handle sizes
if "width" in kwargs:
width = kwargs.pop("width")
self.width = width - self.pad_left - self.pad_right - self.border_left - self.border_right + self.trim_horizontal
if self.width <= 0:
raise Exception("Cell width too small, no room for data.")
if "height" in kwargs:
height = kwargs.pop("height")
self.height = height - self.pad_top - self.pad_bottom - self.border_top - self.border_bottom + self.trim_vertical
if self.height <= 0:
raise Exception("Cell height too small, no room for data.")
# reformat (to new sizes, padding, header and borders)
self.formatted = self._reformat()
def get(self):
"""
Get data, padded and aligned in the form of a list of lines.
"""
self.formatted = self._reformat()
return self.formatted
def __repr__(self):
self.formatted = self._reformat()
return unicode(ANSIString("EvCel<%s>" % self.formatted))
def __str__(self):
"returns cell contents on string form"
self.formatted = self._reformat()
return str(unicode(ANSIString("\n").join(self.formatted)))
def __unicode__(self):
"returns cell contents"
self.formatted = self._reformat()
return unicode(ANSIString("\n").join(self.formatted))
## EvColumn class
class EvColumn(object):
"""
Column class
This class holds a list of Cells to represent a column of a table.
It holds operations and settings that affect *all* cells in the
column.
Columns are not intended to be used stand-alone; they should be
incorporated into an EvTable (like EvCells)
"""
def __init__(self, *args, **kwargs):
"""
Args:
Data for each row in the column
Keywords:
All EvCell keywords are available, these settings
will be persistently applied to every Cell in the column.
"""
self.options = kwargs # column-specific options
self.column = [EvCell(data, **kwargs) for data in args]
#self._balance()
def _balance(self, **kwargs):
"""
Make sure to adjust the width of all cells so we form a
coherent and lined-up column. Will enforce column-specific
options to cells.
"""
col = self.column
kwargs.update(self.options)
# use fixed width or adjust to the largest cell
if not "width" in kwargs:
[cell.reformat() for cell in col] # this is necessary to get initial widths of all cells
kwargs["width"] = max(cell.get_width() for cell in col) if col else 0
[cell.reformat(**kwargs) for cell in col]
def add_rows(self, *args, **kwargs):
"""
Add new cells to column. They will be inserted as
a series of rows. It will inherit the options
of the rest of the column's cells (use update to change
options).
Args:
data for the new cells
Keywords:
ypos - index position in table before which to insert the
new column. Uses Python indexing, so to insert at the top,
use ypos=0. If not given, data will be inserted at the end
of the column.
"""
ypos = kwargs.get("ypos", None)
if ypos is None or ypos > len(self.column):
# add to the end
self.column.extend([EvCell(data, **self.options) for data in args])
else:
# insert cells before given index
ypos = min(len(self.column)-1, max(0, int(ypos)))
new_cells = [EvCell(data, **self.options) for data in args]
self.column = self.column[:ypos] + new_cells + self.column[ypos:]
#self._balance(**kwargs)
def reformat(self, **kwargs):
"""
Change the options for the collumn.
"""
self._balance(**kwargs)
def reformat_cell(self, index, **kwargs):
"""
reformat cell at given index, keeping column
options if necessary
"""
kwargs.update(self.options)
self.column[index].reformat(**kwargs)
def __repr__(self):
return "EvColumn<%i cels>" % len(self.column)
def __len__(self):
return len(self.column)
def __iter__(self):
return iter(self.column)
def __getitem__(self, index):
return self.column[index]
def __setitem__(self, index, value):
self.column[index] = value
def __delitem__(self, index):
del self.column[index]
## Main Evtable class
class EvTable(object):
"""
Table class.
The table holds a list of EvColumns, each consisting of EvCells so
that the result is a 2D matrix.
"""
def __init__(self, *args, **kwargs):
"""
Args:
headers for the table
Keywords:
table - list of columns (lists of lists, or lists of EvColumns) for seeding
the table. If not given, the table will start
out empty
header - True/False - turn off header being treated
as a header (like extra underlining)
pad_width - how much empty space to pad your cells with
(default is 1)
border - None, or one of
"table" - only a border around the whole table
"tablecols" - table and column borders
"header" - only border under header
"cols" - only vertical borders
"incols" - vertical borders, no outer edges
"rows" - only borders between rows
"cells" - border around all cells
border_width - width of table borders, if border is active.
Note that widths wider than 1 may give artifacts in the
corners. Default is 1.
corner_char - character to use in corners when border is
active.
corner_top_left_char - character to use in upper left corner of table
(defaults to corner_char)
corner_top_right_char
corner_bottom_left_char
corner_bottom_right_char
pretty_corners - (default True): use custom characters to make
the table corners look "rounded". Uses UTF-8
characters.
header_line_char - characters to use for underlining
the header row (default is '~')
Requires border to be active.
width - fixed width of table. If not set, width is
set by the total width of each column.
This will resize individual columns in
the vertical direction to fit.
height - fixed height of table. Defaults to unset.
Width is still given precedence. If
height is given, table cells will crop
text rather than expand vertically.
evenwidth - (default False). Used with the width keyword.
Adjusts collumns to have as even width as
possible. This often looks best also for
mixed-length tables.
maxwidth - This will set a maximum width of the table
while allowing it to be smaller. Only if it
grows wider than this size will it be resized.
This has no meaning if width is set.
See Cell class for further kwargs. These will be passed
to each cell in the table.
"""
# at this point table is a 2D grid - a list of columns
# x is the column position, y the row
table = kwargs.pop("table", [])
# header is a list of texts. We merge it to the table's top
header = list(args)
self.header = header != []
if self.header:
if table:
excess = len(header) - len(table)
if excess > 0:
# header bigger than table
self.table.extend([] for i in xrange(excess))
elif excess < 0:
# too short header
header.extend(_to_ansi(["" for i in xrange(abs(excess))]))
for ix, heading in enumerate(header):
table[ix].insert(0, heading)
else:
table = [[heading] for heading in header]
# even though we inserted the header, we can still turn off
# header border underling etc. We only allow this if a header
# was actually set
self.header = kwargs.pop("header", self.header) if self.header else False
hchar = kwargs.pop("header_line_char", "~")
self.header_line_char = hchar[0] if hchar else "~"
border = kwargs.pop("border", "tablecols")
if border is None:
border = "none"
if not border in ("none", "table", "tablecols",
"header", "incols", "cols", "rows", "cells"):
raise Exception("Unsupported border type: '%s'" % border)
self.border = border
# border settings are passed into Cell as well (so kwargs.get and not pop)
self.border_width = kwargs.get("border_width", 1)
self.corner_char = kwargs.get("corner_char", "+")
pcorners = kwargs.pop("pretty_corners", False)
self.corner_top_left_char = _to_ansi(kwargs.pop("corner_top_left_char", '.' if pcorners else self.corner_char))
self.corner_top_right_char = _to_ansi(kwargs.pop("corner_top_right_char", '.' if pcorners else self.corner_char))
self.corner_bottom_left_char = _to_ansi(kwargs.pop("corner_bottom_left_char", ' ' if pcorners else self.corner_char))
self.corner_bottom_right_char = _to_ansi(kwargs.pop("corner_bottom_right_char", ' ' if pcorners else self.corner_char))
self.width = kwargs.pop("width", None)
self.height = kwargs.pop("height", None)
self.evenwidth = kwargs.pop("evenwidth", False)
self.maxwidth = kwargs.pop("maxwidth", None)
if self.maxwidth and self.width and self.maxwidth < self.width:
raise Exception("table maxwidth < table width!")
# size in cell cols/rows
self.ncols = len(table)
self.nrows = max(len(col) for col in table) if table else 0
# size in characters (gets set when _balance is called)
self.nwidth = 0
self.nheight = 0
# save options
self.options = kwargs
# use the temporary table to generate the table on the fly, as a list of EvColumns
self.table = [EvColumn(*col, **kwargs) for col in table]
# this is the actual working table
self.worktable = None
# balance the table
#self._balance()
def _cellborders(self, ix, iy, nx, ny, kwargs):
"""
Adds borders to the table by adjusting the input
kwarg to instjruct cells to build a border in
the right positions. Returns a copy of the
kwarg to return to the cell. This is called
by self._borders.
"""
ret = kwargs.copy()
# handle the various border modes
border = self.border
header = self.header
bwidth = self.border_width
headchar = self.header_line_char
def corners(ret):
"Handle corners of table"
if ix == 0 and iy == 0:
ret["corner_top_left_char"] = self.corner_top_left_char
if ix == nx and iy == 0:
ret["corner_top_right_char"] = self.corner_top_right_char
if ix == 0 and iy == ny:
ret["corner_bottom_left_char"] = self.corner_bottom_left_char
if ix == nx and iy == ny:
ret["corner_bottom_right_char"] = self.corner_bottom_right_char
return ret
def left_edge(ret):
"add vertical border along left table edge"
if ix == 0:
ret["border_left"] = bwidth
ret["trim_horizontal"] = bwidth
return ret
def top_edge(ret):
"add border along top table edge"
if iy == 0:
ret["border_top"] = bwidth
#ret["trim_vertical"] = bwidth
return ret
def right_edge(ret):
"add vertical border along right table edge"
if ix == nx:# and 0 < iy < ny:
ret["border_right"] = bwidth
#ret["trim_horizontal"] = 0
return ret
def bottom_edge(ret):
"add border along bottom table edge"
if iy == ny:
ret["border_bottom"] = bwidth
#ret["trim_vertical"] = bwidth
return ret
def cols(ret):
"Adding vertical borders inside the table"
if 0 <= ix < nx:
ret["border_right"] = bwidth
return ret
def rows(ret):
"Adding horizontal borders inside the table"
if 0 <= iy < ny:
ret["border_bottom"] = bwidth
return ret
def head(ret):
"Add header underline"
if iy == 0:
# put different bottom line for header
ret["border_bottom"] = bwidth
ret["border_bottom_char"] = headchar
return ret
# use the helper functions to define various
# table "styles"
if border in ("table", "tablecols","cells"):
ret = bottom_edge(right_edge(top_edge(left_edge(corners(ret)))))
if border in ("cols", "tablecols", "cells"):
ret = cols(right_edge(left_edge(ret)))
if border in ("incols"):
ret = cols(ret)
if border in ("rows", "cells"):
ret = rows(bottom_edge(top_edge(ret)))
if header and not border in ("none", None):
ret = head(ret)
return ret
def _borders(self):
"""
Add borders to table. This is called from self._balance
"""
nx, ny = self.ncols-1, self.nrows-1
options = self.options
for ix, col in enumerate(self.worktable):
for iy, cell in enumerate(col):
col.reformat_cell(iy, **self._cellborders(ix,iy,nx,ny,options))
def _balance(self):
"""
Balance the table. This means to make sure
all cells on the same row have the same height,
that all columns have the same number of rows
and that the table fits within the given width.
"""
# we make all modifications on a working copy of the
# actual table. This allows us to add columns/rows
# and re-balance over and over without issue.
self.worktable = deepcopy(self.table)
options = copy(self.options)
# balance number of rows to make a rectangular table
# column by column
ncols = len(self.worktable)
nrows = [len(col) for col in self.worktable]
nrowmax = max(nrows) if nrows else 0
for icol, nrow in enumerate(nrows):
self.worktable[icol].reformat(**options)
if nrow < nrowmax:
# add more rows to too-short columns
empty_rows = ["" for i in xrange(nrowmax-nrow)]
self.worktable[icol].add_rows(*empty_rows)
self.ncols = ncols
self.nrows = nrowmax
# add borders - these add to the width/height, so we must do this before calculating width/height
self._borders()
# equalize widths within each column
#print [col.options for col in self.worktable]
#print [[cell.get_width() for cell in col] for col in self.worktable]
#print [[cell.get_height() for cell in col] for col in self.worktable]
cwidths = [max(cell.get_width() for cell in col) for col in self.worktable]
if self.width or self.maxwidth and self.maxwidth < sum(cwidths):
# we set a table width. Horizontal cells will be evenly distributed and
# expand vertically as needed (unless self.height is set, see below)
# use fixed width, or set to maxwidth
width = self.width if self.width else self.maxwidth
if ncols:
# get minimum possible cell widths for each row
cwidths_min = [max(cell.get_min_width() for cell in col) for col in self.worktable]
cwmin = sum(cwidths_min)
if cwmin > width:
# we cannot shrink any more
raise Exception("Cannot shrink table width to %s. Minimum size is %s." % (self.width, cwmin))
excess = width - cwmin
if self.evenwidth:
# make each collumn of equal width
for i in xrange(excess):
# flood-fill the minimum table starting with the smallest collumns
ci = cwidths_min.index(min(cwidths_min))
cwidths_min[ci] += 1
cwidths = cwidths_min
else:
# make each collumn expand more proportional to their data size
for i in xrange(excess):
# fill wider collumns first
ci = cwidths.index(max(cwidths))
cwidths_min[ci] += 1
cwidths[ci] -= 3
cwidths = cwidths_min
# reformat worktable (for width align)
for ix, col in enumerate(self.worktable):
try:
col.reformat(width=cwidths[ix], **options)
except Exception, e:
msg = "ix=%s, width=%s: %s" % (ix, cwidths[ix], e.message)
raise #Exception ("Error in horizontal allign:\n %s" % msg)
# equalize heights for each row (we must do this here, since it may have changed to fit new widths)
cheights = [max(cell.get_height() for cell in (col[iy] for col in self.worktable)) for iy in xrange(nrowmax)]
if self.height:
# if we are fixing the table height, it means cells must crop text instead of resizing.
if nrowmax:
# get minimum possible cell heights for each collumn
cheights_min = [max(cell.get_min_height() for cell in (col[iy] for col in self.worktable)) for iy in xrange(nrowmax)]
chmin = sum(cheights_min)
#print "cheights_min:", cheights_min
if chmin > self.height:
# we cannot shrink any more
raise Exception("Cannot shrink table height to %s. Minimum size is %s." % (self.height, chmin))
# now we add all the extra height up to the desired table-height.
# We do this so that the tallest cells gets expanded first (and
# thus avoid getting cropped)
excess = self.height - chmin
even = self.height % 2 == 0
for i in xrange(excess):
# expand the cells with the most rows first
if 0 <= i < nrowmax and nrowmax > 1:
# avoid adding to header first round (looks bad on very small tables)
ci = cheights[1:].index(max(cheights[1:])) + 1
else:
ci = cheights.index(max(cheights))
cheights_min[ci] += 1
if ci == 0 and self.header:
# it doesn't look very good if header expands too fast
cheights[ci] -= 2 if even else 3
cheights[ci] -= 2 if even else 1
cheights = cheights_min
# we must tell cells to crop instead of expanding
options["enforce_size"] = True
#print "cheights2:", cheights
# reformat table (for vertical align)
for ix, col in enumerate(self.worktable):
for iy, cell in enumerate(col):
try:
col.reformat_cell(iy, height=cheights[iy], **options)
except Exception, e:
msg = "ix=%s, iy=%s, height=%s: %s" % (ix, iy, cheights[iy], e.message)
raise Exception ("Error in vertical allign:\n %s" % msg)
# calculate actual table width/height in characters
self.cwidth = sum(cwidths)
self.cheight = sum(cheights)
#print "actual table width, height:", self.cwidth, self.cheight, self.width, self.height
def _generate_lines(self):
"""
Generates lines across all columns
(each cell may contain multiple lines)
This will also balance the table.
"""
self._balance()
for iy in xrange(self.nrows):
cell_row = [col[iy] for col in self.worktable]
# this produces a list of lists, each of equal length
cell_data = [cell.get() for cell in cell_row]
cell_height = min(len(lines) for lines in cell_data)
for iline in xrange(cell_height):
yield ANSIString("").join(_to_ansi(celldata[iline] for celldata in cell_data))
def add_header(self, *args, **kwargs):
"""
Add header to table. This is a number of texts to
be put at the top of the table. They will replace
an existing header.
"""
self.header = True
self.add_row(ypos=0, *args, **kwargs)
def add_column(self, *args, **kwargs):
"""
Add a column to table. If there are more
rows in new column than there are rows in the
current table, the table will expand with
empty rows in the other columns. If too few,
the new column with get new empty rows. All
filling rows are added to the end.
Args:
Either a single EvColumn instance or
a number of data to be used to create a new column
keyword-
header - the header text for the column
xpos - index position in table before which
to input new column. If not given,
column will be added to the end. Uses
Python indexing (so first column is xpos=0)
See Cell class for other keyword arguments
"""
# this will replace default options with new ones without changing default
options = dict(self.options.items() + kwargs.items())
xpos = kwargs.get("xpos", None)
column = EvColumn(*args, **options)
wtable = self.ncols
htable = self.nrows
excess = len(column) - htable
if excess > 0:
# we need to add new rows to table
for col in self.table:
empty_rows = ["" for i in xrange(excess)]
col.add_rows(*empty_rows, **options)
self.nrows += excess
elif excess < 0:
# we need to add new rows to new column
empty_rows = ["" for i in xrange(abs(excess))]
column.add_rows(*empty_rows, **options)
self.nrows -= excess
header = kwargs.get("header", None)
if header:
column.add_rows(unicode(header), ypos=0, **options)
self.header = True
elif self.header:
# we have a header already. Offset
column.add_rows("", ypos=0, **options)
if xpos is None or xpos > wtable - 1:
# add to the end
self.table.append(column)
else:
# insert column
xpos = min(wtable-1, max(0, int(xpos)))
self.table.insert(xpos, column)
self.ncols += 1
#self._balance()
def add_row(self, *args, **kwargs):
"""
Add a row to table (not a header). If there are
more cells in the given row than there are cells
in the current table the table will be expanded
with empty columns to match. These will be added
to the end of the table. In the same way, adding
a line with too few cells will lead to the last
ones getting padded.
keyword
ypos - index position in table before which to
input new row. If not given, will be added
to the end. Uses Python indexing (so first row is
ypos=0)
See EvCell class for other keyword arguments
"""
# this will replace default options with new ones without changing default
row = list(args)
options = dict(self.options.items() + kwargs.items())
ypos = kwargs.get("ypos", None)
wtable = self.ncols
htable = self.nrows
excess = len(row) - wtable
if excess > 0:
# we need to add new empty columns to table
empty_rows = ["" for i in xrange(htable)]
self.table.extend([EvColumn(*empty_rows, **options) for i in xrange(excess)])
self.ncols += excess
elif excess < 0:
# we need to add more cells to row
row.extend(["" for i in xrange(abs(excess))])
self.ncols -= excess
if ypos is None or ypos > htable - 1:
# add new row to the end
for icol, col in enumerate(self.table):
col.add_rows(row[icol], **options)
else:
# insert row elsewhere
ypos = min(htable-1, max(0, int(ypos)))
for icol, col in enumerate(self.table):
col.add_rows(row[icol], ypos=ypos, **options)
self.nrows += 1
#self._balance()
def reformat(self, **kwargs):
"""
Force a re-shape of the entire table
"""
self.width = kwargs.pop("width", self.width)
self.height = kwargs.pop("height", self.height)
for key, value in kwargs.items():
setattr(self, key, value)
hchar = kwargs.pop("header_line_char", self.header_line_char)
# border settings are also passed on into EvCells (so kwargs.get, not kwargs.pop)
self.header_line_char = hchar[0] if hchar else self.header_line_char
self.border_width = kwargs.get("border_width", self.border_width)
self.corner_char = kwargs.get("corner_char", self.corner_char)
self.header_line_char = kwargs.get("header_line_char", self.header_line_char)
self.corner_top_left_char = _to_ansi(kwargs.pop("corner_top_left_char", self.corner_char))
self.corner_top_right_char = _to_ansi(kwargs.pop("corner_top_right_char", self.corner_char))
self.corner_bottom_left_char = _to_ansi(kwargs.pop("corner_bottom_left_char", self.corner_char))
self.corner_bottom_right_char = _to_ansi(kwargs.pop("corner_bottom_right_char", self.corner_char))
self.options.update(kwargs)
#self._balance()
def reformat_column(self, index, **kwargs):
"""
Sends custom options to a specific column in the table. The column
is identified by its index in the table (0-Ncol)
"""
if index > len(self.table):
raise Exception("Not a valid column index")
self.table[index].options.update(kwargs)
self.table[index].reformat(**kwargs)
#self._balance()
def get(self):
"""
Return lines of table as a list
"""
return [line for line in self._generate_lines()]
def __str__(self):
"print table (this also balances it)"
return str(unicode(ANSIString("\n").join([line for line in self._generate_lines()])))
def __unicode__(self):
return unicode(ANSIString("\n").join([line for line in self._generate_lines()]))
def _test():
"Test"
table = EvTable("{yHeading1{n", "{gHeading2{n", table=[[1,2,3],[4,5,6],[7,8,9]], border="cells", align="l")
table.add_column("{rThis is long data{n", "{bThis is even longer data{n")
table.add_row("This is a single row")
print unicode(table)
table.reformat(width=50)
print unicode(table)
table.reformat_column(3, width=30, align='r')
print unicode(table)
return table