screenshot.py

import logging
import math
from pathlib import Path
import re
from time import time
from typing import List, Optional, Tuple

from PIL import Image, ImageDraw, ImageFont
from PIL.ImageFont import FreeTypeFont

from PIL import ImageFilter
logging.basicConfig(level="DEBUG")
logger = logging.getLogger(__name__)

BG_COMP = "bg_composant"
PROMPT_VAR = "prompt_variable"
GENERATION_VAR = "generation_var"
BOX_COMP = "box_comp"


def wrap_text(font: FreeTypeFont, text: str, max_width: int, direction: str = "ltr") -> str:
    """
    Wraps the text at the given width.
    :param font: Font to use.
    :param text: Text to fit.
    :param max_width: Maximum width of the final text, in pixels.
    :param max_height: Maximum height height of the final text, in pixels.
    :param spacing: The number of pixels between lines.
    :param direction: Direction of the text. It can be 'rtl' (right to
                      left), 'ltr' (left to right) or 'ttb' (top to bottom).
                      Requires libraqm.
    :return: The wrapped text.
    """
    words = text.split()

    lines: list[str] = [""]
    curr_line_width = 0

    for word in words:
        if curr_line_width == 0:
            word_width = font.getlength(word, direction)

            lines[-1] = word
            curr_line_width = word_width
        else:
            new_line_width = font.getlength(f"{lines[-1]} {word}", direction)

            if new_line_width > max_width:
                # Word is too long to fit on the current line
                word_width = font.getlength(word, direction)

                # Put the word on the next line
                lines.append(word)
                curr_line_width = word_width
            else:
                # Put the word on the current line
                lines[-1] = f"{lines[-1]} {word}"
                curr_line_width = new_line_width

    return "\n".join(lines)


# tr.wrap(my_str, width=30)


def _fit_paragraph(
    paragraph,
    font: FreeTypeFont,
    max_width: int,
    max_height: int,
    line_height,
    num_lines: List[str],
    spacing: int = 4,
    direction: str = "ltr",
    
):
    paragraph_lines: list[str] = [""]
    curr_line_width = 0
    # This is a very bad splitter for Chinese
    words = list(paragraph) if re.search(u'[\u4e00-\u9fff]',paragraph) else paragraph.split(" ")

    for word in words:
        if curr_line_width == 0:
            word_width = font.getlength(word, direction)

            if word_width > max_width:
                # Word is longer than max_width
                return None

            paragraph_lines[-1] = word
            curr_line_width = word_width
        else:
            new_line_width = font.getlength(f"{paragraph_lines[-1]} {word}", direction)

            if new_line_width > max_width:
                # Word is too long to fit on the current line
                word_width = font.getlength(word, direction)
                new_num_lines = num_lines + len(paragraph_lines) + 1
                new_text_height = (new_num_lines * line_height) + (new_num_lines * spacing)

                if word_width > max_width or new_text_height > max_height:
                    # Word is longer than max_width, and
                    # adding a new line would make the text too tall
                    return None

                # Put the word on the next line
                paragraph_lines.append(word)
                curr_line_width = word_width
            else:
                # Put the word on the current line
                paragraph_lines[-1] = f"{paragraph_lines[-1]} {word}"
                curr_line_width = new_line_width
    return paragraph_lines

def try_fit_text(
    font: FreeTypeFont,
    prompt: str,
    generation: str,
    max_width: int,
    max_height: int,
    spacing: int = 4,
    direction: str = "ltr",
) -> Optional[str]:
    """
    Attempts to wrap the text into a rectangle.
    Tries to fit the text into a box using the given font at decreasing sizes,
    based on ``scale_factor``. Makes ``max_iterations`` attempts.
    :param font: Font to use.
    :param text: Text to fit.
    :param max_width: Maximum width of the final text, in pixels.
    :param max_height: Maximum height height of the final text, in pixels.
    :param spacing: The number of pixels between lines.
    :param direction: Direction of the text. It can be 'rtl' (right to
                      left), 'ltr' (left to right) or 'ttb' (top to bottom).
                      Requires libraqm.
    :return: If able to fit the text, the wrapped text. Otherwise, ``None``.
    """

    line_height = font.size

    if line_height > max_height:
        # The line height is already too big
        return None

    prompt_lines: list[str] = []
    paragraphs = prompt.split("\n")
    for paragraph in paragraphs:
        paragraph_lines = _fit_paragraph(
            paragraph=paragraph,
            font=font,
            max_width=max_width,
            max_height=max_height,
            line_height=line_height,
            spacing=spacing,
            num_lines=len(prompt_lines),
            direction=direction,
        )
        if paragraph_lines is None:
            return None
        prompt_lines.extend(paragraph_lines)
    generation_lines: list[str] = []
    paragraphs = f"{prompt_lines[-1]}{generation}".split("\n")
    for paragraph in paragraphs:
        paragraph_lines = _fit_paragraph(
            paragraph=paragraph,
            font=font,
            max_width=max_width,
            max_height=max_height,
            line_height=line_height,
            spacing=spacing,
            num_lines=len(prompt_lines) + len(generation_lines),
            direction=direction,
        )
        if paragraph_lines is None:
            return None
        generation_lines.extend(paragraph_lines)
    generation_lines[0] = generation_lines[0][len(prompt_lines[-1]):]
    return "\n".join(prompt_lines), "\n".join(generation_lines)


# pylint: disable=too-many-arguments
def fit_text(
    font,
    prompt: str,
    generation: str,
    max_width: int,
    max_height: int,
    spacing: int = 4,
    scale_factor: float = 0.8,
    max_iterations: int = 5,
    direction: str = "ltr",
) -> Tuple[FreeTypeFont, str]:
    """
    Automatically determines text wrapping and appropriate font size.
    Tries to fit the text into a box using the given font at decreasing sizes,
    based on ``scale_factor``. Makes ``max_iterations`` attempts.
    If unable to find an appropriate font size within ``max_iterations``
    attempts, wraps the text at the last attempted size.
    :param font: Font to use.
    :param text: Text to fit.
    :param max_width: Maximum width of the final text, in pixels.
    :param max_height: Maximum height height of the final text, in pixels.
    :param spacing: The number of pixels between lines.
    :param scale_factor:
    :param max_iterations: Maximum number of attempts to try to fit the text.
    :param direction: Direction of the text. It can be 'rtl' (right to
                      left), 'ltr' (left to right) or 'ttb' (top to bottom).
                      Requires libraqm.
    :return: The font at the appropriate size and the wrapped text.
    """
    initial_font_size = font.size

    # logger.debug('Trying to fit text "%s"', text)

    for i in range(max_iterations):
        trial_font_size = int(initial_font_size * pow(scale_factor, i))
        trial_font = font.font_variant(size=trial_font_size)

        logger.debug("Trying font size %i", trial_font_size)

        wrapped = try_fit_text(trial_font, prompt, generation, max_width, max_height, spacing, direction)

        if wrapped is not None:
            logger.debug("Successfully fit text")
            return (trial_font, wrapped)

    # Give up and wrap the text at the last size
    logger.debug("Gave up trying to fit text; just wrapping text")
    wrapped = wrap_text(trial_font, prompt, max_width, direction) + wrap_text(
        trial_font, generation, max_width, direction
    )

    return (trial_font, wrapped)



def main(
    prompt,
    generation,
    width,
    height,
    assets_path,
    font_path,
    colors,
    frame_to_box_margin,
    text_to_text_box_margin,
    init_font_size,
    right_align = False
):
    # prompt_color = "#ffffff"
    # text_color = "#FF57A0"
    # text_box = ((500, 500, 2300, 1800))
    # margin = 50
    # input_color = "#CDD2E3"
    right_align_params = {"direction":'rtl',"align":'right',"features":'rtla'} if right_align else {}
    text_box_margin_r = frame_to_box_margin
    text_box_margin_t = frame_to_box_margin
    text_box_margin_l = frame_to_box_margin
    text_box_margin_b = int(height / 4.5)

    text_box = (
        text_box_margin_l,
        text_box_margin_t,
        width - text_box_margin_r,
        height - text_box_margin_b,
    )

    background = Image.new("RGB", (width, height), color=colors[BG_COMP])
    # Get assets
    assets_path = Path(assets_path)
    flower_1 = Image.open(assets_path / "image_1.png").copy()
    flower_2 = Image.open(assets_path / "image_2.png").copy()
    shadow = Image.open(assets_path / "image_3.png").copy()
    bloom_logo = Image.open(assets_path / "image_4.png").copy()
    input_info = Image.open(assets_path / "image_7.png").copy()
    output_info = Image.open(assets_path / "image_6.png").copy()
    details = Image.open(assets_path / "image_5.png").copy()

    flower_1_offsets = (int(width - flower_1.width * 2 / 3), int(-flower_1.height / 3))
    background.paste(flower_1, flower_1_offsets, flower_1)

    flower_2_offsets = (
        -int(flower_2.width * 2 / 5),
        int(height / 2 - flower_2.height / 2),
    )
    background.paste(flower_2, flower_2_offsets, flower_2)

    bloom_offsets = (
        frame_to_box_margin,
        int(height - bloom_logo.height - frame_to_box_margin),
    )
    background.paste(bloom_logo, bloom_offsets, bloom_logo)

    input_info_offsets = (
        width - details.width - text_to_text_box_margin - input_info.width - output_info.width ,
        int(height - details.height - frame_to_box_margin),
    )
    background.paste(input_info, input_info_offsets, input_info)

    output_info_offsets =(
        width - details.width - text_to_text_box_margin - input_info.width - output_info.width ,
        int(height - details.height - frame_to_box_margin + input_info.height + text_to_text_box_margin),
    )
    background.paste(output_info, output_info_offsets, output_info)

    details_offsets = (
        width - frame_to_box_margin - details.width ,
        int(height - details.height - frame_to_box_margin),
    )
    background.paste(details, details_offsets, details)
    box_margin = (
        text_box[0] + text_to_text_box_margin,
        text_box[1] + text_to_text_box_margin,
        text_box[2] - text_to_text_box_margin,
        text_box[3] - text_to_text_box_margin,
    )

    # text_box = ImageText(box_margin)
    drawing = ImageDraw.Draw(background, "RGBA")

    # Text box for main text
    input_color = colors[BOX_COMP][1:]
    input_color = tuple(int(input_color[i : i + 2], 16) for i in (0, 2, 4)) + (
        int(255 * 0.99),
    )  # RGB + A
    drawing.rounded_rectangle(text_box, outline="#000", fill=input_color, radius=47.9)

    # Adapt text size to box
    # font, (prompt_a, generation_a) = adapt_text_to_ratio(box_margin, prompt, generation)
    # generation_a = adapt_text_to_ratio(box_margin, generation, prompt)
    # font = adapt_font_to_text(box_margin, prompt_a + generation_a, font_path=font_path)

    init_font = ImageFont.truetype(font_path, size=init_font_size)
    font, (prompt_a, generation_a) = fit_text(
        prompt=prompt,
        generation=generation,
        font=init_font,
        max_height=box_margin[3] - box_margin[1],
        max_width=box_margin[2] - box_margin[0],
        max_iterations=50,
        scale_factor=0.95,
        direction="rtl" if right_align else "ltr"
    )
    # Prompt, main, then the last line
    prompt_s = prompt_a.split("\n")
    prompt_main = "\n".join(prompt_s[:-1])
    prompt_lastline = prompt_s[-1]
    drawing.multiline_text(
        (box_margin[0], box_margin[1]), 
        prompt_main, 
        colors[PROMPT_VAR], 
        font,
        **right_align_params
    )
    end_prompt_main = font.getsize_multiline(prompt_main)
    end_prompt_last = font.getsize_multiline(prompt_lastline)
    drawing.multiline_text(
        ((box_margin[2] - end_prompt_last[0]) if right_align else box_margin[0], box_margin[1] + end_prompt_main[1]),
        prompt_lastline,
        colors[PROMPT_VAR],
        font,
        **right_align_params
    )

    # Generated text, first line, then the rest
    generation_split = generation_a.split("\n")
    generation_firstline = generation_split[0]
    generation_main = "\n".join(generation_split[1:])
    drawing.multiline_text(
        # margin x + length(last line of prompt), margin Y + length(main part of prompt)
        (box_margin[0], box_margin[1] + end_prompt_main[1]) if right_align else \
        (box_margin[0] + end_prompt_last[0], box_margin[1] + end_prompt_main[1]),
        generation_firstline,
        colors[GENERATION_VAR],
        font, 
        **right_align_params
    )
    drawing.multiline_text(
        (box_margin[0], box_margin[1] + end_prompt_main[1] + end_prompt_last[1]),
        generation_main,
        colors[GENERATION_VAR],
        font,
        **right_align_params
    )

    final_font_size = font.size
    return final_font_size, background