"""
text - Plot text on a figure figure.
"""
import numpy as np
from pygmt.clib import Session
from pygmt.exceptions import GMTInvalidInput
from pygmt.helpers import (
build_arg_string,
data_kind,
dummy_context,
fmt_docstring,
is_nonstr_iter,
kwargs_to_strings,
use_alias,
)
@fmt_docstring
@use_alias(
R="region",
J="projection",
B="frame",
C="clearance",
D="offset",
G="fill",
N="no_clip",
V="verbose",
W="pen",
X="xshift",
Y="yshift",
p="perspective",
t="transparency",
)
@kwargs_to_strings(
R="sequence",
textfiles="sequence_space",
angle="sequence_comma",
font="sequence_comma",
justify="sequence_comma",
p="sequence",
)
def text(
self,
textfiles=None,
x=None,
y=None,
position=None,
text=None,
angle=None,
font=None,
justify=None,
**kwargs,
):
"""
Plot or typeset text strings of variable size, font type, and orientation.
Must provide at least one of the following combinations as input:
- *textfiles*
- *x*, *y*, and *text*
- *position* and *text*
Full option list at :gmt-docs:`text.html`
{aliases}
Parameters
----------
textfiles : str or list
A text data file name, or a list of filenames containing 1 or more
records with (x, y[, angle, font, justify], text).
x/y : float or 1d arrays
The x and y coordinates, or an array of x and y coordinates to plot
the text
position : str
Sets reference point on the map for the text by using x,y
coordinates extracted from *region* instead of providing them
through *x* and *y*. Specify with a two letter (order independent)
code, chosen from:
* Horizontal: L(eft), C(entre), R(ight)
* Vertical: T(op), M(iddle), B(ottom)
For example, position="TL" plots the text at the Upper Left corner
of the map.
text : str or 1d array
The text string, or an array of strings to plot on the figure
angle: int, float, str or bool
Set the angle measured in degrees counter-clockwise from
horizontal. E.g. 30 sets the text at 30 degrees. If no angle is
explicitly given (i.e. angle=True) then the input textfile(s) must
have this as a column.
font : str or bool
Set the font specification with format "size,font,color" where size
is text size in points, font is the font to use, and color sets the
font color. E.g. "12p,Helvetica-Bold,red" selects a 12p red
Helvetica-Bold font. If no font info is explicitly given (i.e.
font=True), then the input textfile(s) must have this information
in one of its columns.
justify : str or bool
Set the alignment which refers to the part of the text string that
will be mapped onto the (x,y) point. Choose a 2 character
combination of L, C, R (for left, center, or right) and T, M, B for
top, middle, or bottom. E.g., BL for lower left. If no
justification is explicitly given (i.e. justify=True), then the
input textfile(s) must have this as a column.
{J}
{R}
clearance : str
``[dx/dy][+to|O|c|C]``
Adjust the clearance between the text and the surrounding box
[15%]. Only used if *pen* or *fill* are specified. Append the unit
you want ('c' for cm, 'i' for inch, or 'p' for point; if not given
we consult 'PROJ_LENGTH_UNIT') or '%' for a percentage of the
font size. Optionally, use modifier '+t' to set the shape of the
textbox when using *fill* and/or *pen*. Append lower case 'o' to
get a straight rectangle [Default]. Append upper case 'O' to get a
rounded rectangle. In paragraph mode (*paragraph*) you can also
append lower case 'c' to get a concave rectangle or append upper
case 'C' to get a convex rectangle.
fill : str
Sets the shade or color used for filling the text box [Default is
no fill].
offset : str
``[j|J]dx[/dy][+v[pen]]``
Offsets the text from the projected (x,y) point by dx,dy [0/0]. If
dy is not specified then it is set equal to dx. Use offset='j' to
offset the text away from the point instead (i.e., the text
justification will determine the direction of the shift). Using
offset='J' will shorten diagonal offsets at corners by sqrt(2).
Optionally, append '+v' which will draw a line from the original
point to the shifted point; append a pen to change the attributes
for this line.
pen : str
Sets the pen used to draw a rectangle around the text string
(see *clearance*) [Default is width = default, color = black,
style = solid].
no_clip : bool
Do NOT clip text at map boundaries [Default is False, i.e. will
clip].
{V}
{XY}
{p}
{t}
"""
# pylint: disable=too-many-locals
# pylint: disable=too-many-branches
kwargs = self._preprocess(**kwargs)
# Ensure inputs are either textfiles, x/y/text, or position/text
if position is None:
kind = data_kind(textfiles, x, y, text)
else:
if x is not None or y is not None:
raise GMTInvalidInput(
"Provide either position only, or x/y pairs, not both"
)
kind = "vectors"
if kind == "vectors" and text is None:
raise GMTInvalidInput("Must provide text with x/y pairs or position")
# Build the `-F` argument in gmt text.
if "F" not in kwargs.keys() and (
(
position is not None
or angle is not None
or font is not None
or justify is not None
)
):
kwargs.update({"F": ""})
if angle is not None and isinstance(angle, (int, float, str)):
kwargs["F"] += f"+a{str(angle)}"
if font is not None and isinstance(font, str):
kwargs["F"] += f"+f{font}"
if justify is not None and isinstance(justify, str):
kwargs["F"] += f"+j{justify}"
if position is not None and isinstance(position, str):
kwargs["F"] += f'+c{position}+t"{text}"'
extra_arrays = []
# If an array of transparency is given, GMT will read it from
# the last numerical column per data record.
if "t" in kwargs and is_nonstr_iter(kwargs["t"]):
extra_arrays.append(kwargs["t"])
kwargs["t"] = ""
with Session() as lib:
file_context = dummy_context(textfiles) if kind == "file" else ""
if kind == "vectors":
if position is not None:
file_context = dummy_context("")
else:
file_context = lib.virtualfile_from_vectors(
np.atleast_1d(x),
np.atleast_1d(y),
*extra_arrays,
# text must be in str type, see issue #706
np.atleast_1d(text).astype(str),
)
with file_context as fname:
arg_str = " ".join([fname, build_arg_string(kwargs)])
lib.call_module("text", arg_str)