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import math
from pathlib import Path
from fpdf import FPDF
from fpdf.enums import Angle
from test.conftest import assert_pdf_equal, LOREM_IPSUM
HERE = Path(__file__).resolve().parent
def draw_mirror_line(pdf, origin, angle):
"""
A helper method which converts a given angle and origin to two co-ordinates to
then draw a line.
Used to help visualize & test mirror transformations.
Args:
pdf (fpdf.FPDF): pdf to modify
origin (float, Sequence[float, float]): a point on the mirror line
angle: (fpdf.enums.Angle): the direction of the mirror line
"""
x, y = origin
try:
theta = Angle.coerce(angle).value
except ValueError:
theta = angle
cos_theta, sin_theta = (
math.cos(math.radians(theta)),
math.sin(math.radians(theta)) * -1,
)
x1 = x - (150 * cos_theta)
y1 = y - (150 * sin_theta)
x2 = x + (150 * cos_theta)
y2 = y + (150 * sin_theta)
pdf.line(x1=x1, y1=y1, x2=x2, y2=y2)
def test_mirror(tmp_path):
pdf = FPDF()
pdf.add_page()
pdf.set_line_width(0.5)
pdf.set_draw_color(r=255, g=128, b=0)
img_filepath = HERE / "image/png_images/66ac49ef3f48ac9482049e1ab57a53e9.png"
pdf.image(img_filepath, x=100, y=100)
pdf.image(img_filepath, x=100, y=100)
with pdf.mirror((pdf.epw / 2, pdf.eph / 2.5), "WEST"):
draw_mirror_line(pdf, (pdf.epw / 2, pdf.eph / 2.5), "WEST")
pdf.image(img_filepath, x=100, y=100)
with pdf.mirror((pdf.epw / 2.5, pdf.eph / 2), "SOUTH"):
pdf.set_draw_color(r=128, g=0, b=0)
draw_mirror_line(pdf, (pdf.epw / 2.5, pdf.eph / 2), "SOUTH")
pdf.image(img_filepath, x=100, y=100)
with pdf.mirror((pdf.epw / 1.5, pdf.eph / 1.5), "SOUTHWEST"):
pdf.set_draw_color(r=0, g=0, b=128)
draw_mirror_line(pdf, (pdf.epw / 1.5, pdf.eph / 1.5), "SOUTHWEST")
pdf.image(img_filepath, x=100, y=100)
with pdf.mirror((pdf.epw / 3, pdf.eph / 2.5), "SOUTHEAST"):
pdf.set_draw_color(r=0, g=128, b=0)
draw_mirror_line(pdf, (pdf.epw / 3, pdf.eph / 2.5), "SOUTHEAST")
pdf.image(img_filepath, x=100, y=100)
assert_pdf_equal(pdf, HERE / "mirror.pdf", tmp_path)
def test_mirror_with_angle_as_number(tmp_path):
pdf = FPDF()
pdf.set_font("helvetica", size=50)
pdf.add_page()
x, y = 50, 50
pdf.text(x, y, text="mirror this text")
with pdf.mirror((x, y), 180):
pdf.set_text_color(r=255, g=128, b=0)
pdf.text(x, y, text="mirror this text")
assert_pdf_equal(pdf, HERE / "mirror_with_angle_as_number.pdf", tmp_path)
def test_mirror_text(tmp_path):
pdf = FPDF()
pdf.add_page()
pdf.set_font("helvetica", size=12)
pdf.text(pdf.epw / 2, pdf.epw / 2, text="mirror this text")
with pdf.mirror((pdf.epw / 2, pdf.eph / 2.5), "EAST"):
pdf.text(pdf.epw / 2, pdf.eph / 2, text="mirrored text E/W")
with pdf.mirror((pdf.epw / 2.5, pdf.eph / 2), "NORTH"):
pdf.text(pdf.epw / 2, pdf.eph / 2, text="mirrored text N/S")
with pdf.mirror((pdf.epw / 1.5, pdf.eph / 1.5), "NORTHWEST"):
pdf.text(pdf.epw / 2, pdf.eph / 2, text="mirrored text NW/SE")
with pdf.mirror((pdf.epw / 2.5, pdf.eph / 2.5), "NORTHEAST"):
pdf.text(pdf.epw / 2, pdf.eph / 2, text="mirrored text NE/SW")
assert_pdf_equal(pdf, HERE / "mirror_text.pdf", tmp_path)
def test_mirror_cell(tmp_path):
pdf = FPDF()
pdf.add_page()
pdf.set_font("helvetica", size=12)
pdf.set_fill_color(255, 255, 0)
pdf.cell(text="cell to be mirrored repeatedly")
pdf.x = pdf.l_margin
with pdf.mirror((pdf.epw / 2, 0), "NORTH"):
draw_mirror_line(pdf, (pdf.epw / 2, 0), "NORTH")
pdf.cell(text="cell mirrored", fill=True)
pdf.cell(text="cell mirrored", fill=True)
pdf.cell(text="cell mirrored", fill=True)
pdf.ln(40)
pdf.cell(text="cell text 1")
pdf.x = pdf.l_margin
with pdf.mirror((pdf.epw / 2, pdf.eph / 4), "EAST"):
draw_mirror_line(pdf, (pdf.epw / 2, pdf.eph / 4), "EAST")
pdf.cell(text="cell text 1", fill=True)
pdf.ln(40)
pdf.cell(text="cell text 2")
pdf.x = pdf.l_margin
with pdf.mirror((pdf.epw / 2, 0), "SOUTHWEST"):
draw_mirror_line(pdf, (pdf.epw / 2, 0), "SOUTHWEST")
pdf.cell(text="cell text 2", fill=True)
pdf.ln(40)
pdf.cell(text="cell text 3")
pdf.x = pdf.l_margin
with pdf.mirror((pdf.epw / 2, pdf.eph / 4), "NORTHEAST"):
draw_mirror_line(pdf, (pdf.epw / 2, pdf.eph / 4), "NORTHEAST")
pdf.cell(text="cell text 3", fill=True, border=1)
pdf.ln(40)
assert_pdf_equal(pdf, HERE / "mirror_cell.pdf", tmp_path)
def test_mirror_multi_cell(tmp_path):
pdf = FPDF()
pdf.add_page()
pdf.set_font("helvetica", size=12)
pdf.set_fill_color(255, 255, 0)
pdf.multi_cell(w=50, text=LOREM_IPSUM[:200])
pdf.x = pdf.l_margin
pdf.y = pdf.t_margin
with pdf.mirror((pdf.epw / 2, pdf.eph / 4), "NORTHEAST"):
draw_mirror_line(pdf, (pdf.epw / 2, pdf.eph / 4), "NORTHEAST")
pdf.multi_cell(w=50, text=LOREM_IPSUM[:200], fill=True)
pdf.ln(20)
prev_y = pdf.y
pdf.multi_cell(w=100, text=LOREM_IPSUM[:200])
pdf.x = pdf.l_margin
pdf.y = prev_y
with pdf.mirror((0, pdf.eph / 2), "EAST"):
draw_mirror_line(pdf, (0, pdf.eph / 2), "EAST")
pdf.multi_cell(w=100, text=LOREM_IPSUM[:200], fill=True)
pdf.ln(150)
prev_y = pdf.y
pdf.multi_cell(w=120, text=LOREM_IPSUM[:120])
pdf.x = pdf.l_margin
pdf.y = prev_y
with pdf.mirror((pdf.epw / 2, pdf.eph), "SOUTH"):
draw_mirror_line(pdf, (pdf.epw / 2, pdf.eph), "SOUTH")
pdf.multi_cell(w=120, text=LOREM_IPSUM[:120], fill=True, border=1)
assert_pdf_equal(pdf, HERE / "mirror_multi_cell.pdf", tmp_path)
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