"""
text - Plot text on a 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",
U="timestamp",
V="verbose",
W="pen",
X="xshift",
Y="yshift",
a="aspatial",
c="panel",
e="find",
f="coltypes",
h="header",
i="incols",
p="perspective",
t="transparency",
w="wrap",
)
@kwargs_to_strings(
R="sequence",
textfiles="sequence_space",
angle="sequence_comma",
font="sequence_comma",
justify="sequence_comma",
c="sequence_comma",
i="sequence_comma",
p="sequence",
)
def text_(
self,
textfiles=None,
x=None,
y=None,
position=None,
text=None,
angle=None,
font=None,
justify=None,
**kwargs,
):
r"""
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``/``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 to ``textfiles``
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. For example,
``font="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 to ``textfiles`` 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 to ``textfiles`` must have this as a column.
{J}
{R}
*Required if this is the first plot command.*
clearance : str
[*dx/dy*][**+to**\|\ **O**\|\ **c**\|\ **C**].
Adjust the clearance between the text and the surrounding box
[Default is 15% of the font size]. 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 is **o**]. 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 **j** to
offset the text away from the point instead (i.e., the text
justification will determine the direction of the shift). Using
**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 will clip].
{U}
{V}
{XY}
{a}
{c}
{e}
{f}
{h}
{i}
{p}
{t}
*transparency* can also be a 1d array to set varying transparency
for texts, but this option is only valid if using x/y/text.
{w}
"""
# pylint: disable=too-many-locals
# pylint: disable=too-many-branches
kwargs = self._preprocess(**kwargs) # pylint: disable=protected-access
# 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 option in gmt text.
if kwargs.get("F") is None 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 True:
kwargs["F"] += "+a"
elif isinstance(angle, (int, float, str)):
kwargs["F"] += f"+a{str(angle)}"
if font is True:
kwargs["F"] += "+f"
elif isinstance(font, str):
kwargs["F"] += f"+f{font}"
if justify is True:
kwargs["F"] += "+j"
elif isinstance(justify, str):
kwargs["F"] += f"+j{justify}"
if 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 kwargs.get("t") is not None 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:
lib.call_module("text", build_arg_string(kwargs, infile=fname))