421 lines
16 KiB
Python
421 lines
16 KiB
Python
import os
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from typing import List, Optional
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import uuid
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from lxml import etree
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from pptx import Presentation
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from pptx.shapes.autoshape import Shape
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from pptx.slide import Slide
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from pptx.text.text import _Paragraph, TextFrame, Font, _Run
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from pptx.opc.constants import RELATIONSHIP_TYPE as RT
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from lxml.etree import fromstring, tostring
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from PIL import Image
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from pptx.util import Pt
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from pptx.dml.color import RGBColor
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from ppt_generator.models.pptx_models import (
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PptxAutoShapeBoxModel,
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PptxBoxShapeEnum,
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PptxConnectorModel,
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PptxFillModel,
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PptxFontModel,
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PptxParagraphModel,
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PptxPictureBoxModel,
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PptxPositionModel,
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PptxPresentationModel,
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PptxShadowModel,
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PptxSlideModel,
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PptxSpacingModel,
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PptxStrokeModel,
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PptxTextBoxModel,
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PptxTextRunModel,
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)
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from ppt_generator.utils import (
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clip_image,
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fit_image,
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round_image_corners,
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create_circle_image,
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change_image_color,
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)
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BLANK_SLIDE_LAYOUT = 6
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class PptxPresentationCreator:
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def __init__(self, ppt_model: PptxPresentationModel, temp_dir: str):
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self._temp_dir = temp_dir
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self._ppt_model = ppt_model
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self._slide_models = ppt_model.slides
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self._ppt = Presentation()
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self._ppt.slide_width = Pt(1280)
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self._ppt.slide_height = Pt(720)
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self._slide_fill = PptxFillModel(color=ppt_model.background_color)
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def create_ppt(self):
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for slide_model in self._slide_models:
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# Adding global shapes to slide
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if self._ppt_model.shapes:
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slide_model.shapes.append(self._ppt_model.shapes)
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self.add_and_populate_slide(slide_model)
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def set_presentation_theme(self):
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slide_master = self._ppt.slide_master
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slide_master_part = slide_master.part
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theme_part = slide_master_part.part_related_by(RT.THEME)
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theme = fromstring(theme_part.blob)
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theme_colors = self._theme.colors.theme_color_mapping
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nsmap = {"a": "http://schemas.openxmlformats.org/drawingml/2006/main"}
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for color_name, hex_value in theme_colors.items():
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if color_name:
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color_element = theme.xpath(
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f"a:themeElements/a:clrScheme/a:{color_name}/a:srgbClr",
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namespaces=nsmap,
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)[0]
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color_element.set("val", hex_value.encode("utf-8"))
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theme_part._blob = tostring(theme)
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def add_and_populate_slide(self, slide_model: PptxSlideModel):
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slide = self._ppt.slides.add_slide(self._ppt.slide_layouts[BLANK_SLIDE_LAYOUT])
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if self._slide_fill:
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self.apply_fill_to_shape(slide.background, self._slide_fill)
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for shape_model in slide_model.shapes:
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model_type = type(shape_model)
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if model_type is PptxPictureBoxModel:
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self.add_picture(slide, shape_model)
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elif model_type is PptxAutoShapeBoxModel:
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self.add_autoshape(slide, shape_model)
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elif model_type is PptxTextBoxModel:
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self.add_textbox(slide, shape_model)
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elif model_type is PptxConnectorModel:
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self.add_connector(slide, shape_model)
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def add_connector(self, slide: Slide, connector_model: PptxConnectorModel):
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if connector_model.thickness == 0:
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return
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connector_shape = slide.shapes.add_connector(
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connector_model.type, *connector_model.position.to_pt_xyxy()
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)
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connector_shape.line.width = Pt(connector_model.thickness)
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connector_shape.line.color.rgb = RGBColor.from_string(connector_model.color)
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def add_picture(self, slide: Slide, picture_model: PptxPictureBoxModel):
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image_path = picture_model.picture.path
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if (
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picture_model.clip
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or picture_model.border_radius
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or picture_model.overlay
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or picture_model.object_fit
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or picture_model.shape
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):
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try:
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image = Image.open(image_path)
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except:
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print(f"Could not open image: {image_path}")
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return
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image = image.convert("RGBA")
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# ? Applying border radius twice to support both clip and object fit
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if picture_model.border_radius:
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image = round_image_corners(image, picture_model.border_radius)
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if picture_model.object_fit:
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image = fit_image(
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image,
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picture_model.position.width,
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picture_model.position.height,
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picture_model.object_fit,
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)
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elif picture_model.clip:
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image = clip_image(
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image,
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picture_model.position.width,
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picture_model.position.height,
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)
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if picture_model.border_radius:
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image = round_image_corners(image, picture_model.border_radius)
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if picture_model.shape == PptxBoxShapeEnum.CIRCLE:
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image = create_circle_image(image)
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if picture_model.overlay:
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image = change_image_color(image, picture_model.overlay)
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image_path = os.path.join(self._temp_dir, f"{str(uuid.uuid4())}.png")
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image.save(image_path)
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margined_position = self.get_margined_position(
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picture_model.position, picture_model.margin
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)
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slide.shapes.add_picture(image_path, *margined_position.to_pt_list())
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def add_autoshape(self, slide: Slide, autoshape_box_model: PptxAutoShapeBoxModel):
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position = autoshape_box_model.position
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if autoshape_box_model.margin:
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position = self.get_margined_position(position, autoshape_box_model.margin)
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autoshape = slide.shapes.add_shape(
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autoshape_box_model.type, *position.to_pt_list()
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)
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textbox = autoshape.text_frame
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textbox.word_wrap = autoshape_box_model.text_wrap
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self.apply_fill_to_shape(autoshape, autoshape_box_model.fill)
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self.apply_margin_to_text_box(textbox, autoshape_box_model.margin)
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self.apply_stroke_to_shape(autoshape, autoshape_box_model.stroke)
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self.apply_shadow_to_shape(autoshape, autoshape_box_model.shadow)
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self.apply_border_radius_to_shape(autoshape, autoshape_box_model.border_radius)
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if autoshape_box_model.paragraphs:
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self.add_paragraphs(textbox, autoshape_box_model.paragraphs)
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def add_textbox(self, slide: Slide, textbox_model: PptxTextBoxModel):
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position = textbox_model.position
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textbox_shape = slide.shapes.add_textbox(*position.to_pt_list())
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textbox_shape.width += Pt(2)
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textbox = textbox_shape.text_frame
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textbox.word_wrap = textbox_model.text_wrap
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self.apply_fill_to_shape(textbox_shape, textbox_model.fill)
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self.apply_margin_to_text_box(textbox, textbox_model.margin)
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self.add_paragraphs(textbox, textbox_model.paragraphs)
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def add_paragraphs(
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self, textbox: TextFrame, paragraph_models: List[PptxParagraphModel]
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):
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for index, paragraph_model in enumerate(paragraph_models):
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paragraph = textbox.add_paragraph() if index > 0 else textbox.paragraphs[0]
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self.populate_paragraph(paragraph, paragraph_model)
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def populate_paragraph(
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self, paragraph: _Paragraph, paragraph_model: PptxParagraphModel
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):
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if paragraph_model.spacing:
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self.apply_spacing_to_paragraph(paragraph, paragraph_model.spacing)
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if paragraph_model.alignment:
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paragraph.alignment = paragraph_model.alignment
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if paragraph_model.font:
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self.apply_font_to_paragraph(paragraph, paragraph_model.font)
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text_runs = []
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if paragraph_model.text:
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text_runs = self.parse_markdown_text_to_text_runs(
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paragraph_model.font, paragraph_model.text
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)
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elif paragraph_model.text_runs:
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text_runs = paragraph_model.text_runs
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for text_run_model in text_runs:
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text_run = paragraph.add_run()
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self.populate_text_run(text_run, text_run_model)
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def parse_markdown_text_to_text_runs(self, font: PptxFontModel, text: str):
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text_runs = []
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for line in text.split("\n"):
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current_pos = 0
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while current_pos < len(line):
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# Check for bold and italic (***text***)
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if (
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line[current_pos:].startswith("***")
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and "***" in line[current_pos + 3 :]
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):
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end_pos = line.find("***", current_pos + 3)
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text_content = line[current_pos + 3 : end_pos]
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font_json = font.model_dump()
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font_json["bold"] = True
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font_json["italic"] = True
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text_runs.append(
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PptxTextRunModel(
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text=text_content, font=PptxFontModel(**font_json)
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)
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)
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current_pos = end_pos + 3
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# Check for bold (**text**)
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elif (
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line[current_pos:].startswith("**")
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and "**" in line[current_pos + 2 :]
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):
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end_pos = line.find("**", current_pos + 2)
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text_content = line[current_pos + 2 : end_pos]
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font_json = font.model_dump()
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font_json["bold"] = True
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text_runs.append(
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PptxTextRunModel(
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text=text_content, font=PptxFontModel(**font_json)
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)
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)
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current_pos = end_pos + 2
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# Check for italic (*text*)
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elif (
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line[current_pos:].startswith("__")
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and "__" in line[current_pos + 2 :]
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):
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end_pos = line.find("__", current_pos + 2)
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text_content = line[current_pos + 2 : end_pos]
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font_json = font.model_dump()
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font_json["italic"] = True
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text_runs.append(
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PptxTextRunModel(
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text=text_content, font=PptxFontModel(**font_json)
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)
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)
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current_pos = end_pos + 2
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else:
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# Find the next formatting marker or end of line
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next_marker = float("inf")
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for marker in ["***", "**", "__"]:
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pos = line.find(marker, current_pos)
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if pos != -1:
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next_marker = min(next_marker, pos)
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end_pos = next_marker if next_marker != float("inf") else len(line)
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text_content = line[current_pos:end_pos]
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if text_content: # Only add non-empty text
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text_runs.append(PptxTextRunModel(text=text_content, font=font))
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current_pos = end_pos
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# Add newline if not the last line
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if line != text.split("\n")[-1]:
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text_runs.append(PptxTextRunModel(text="\n"))
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return text_runs
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def populate_text_run(self, text_run: _Run, text_run_model: PptxTextRunModel):
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text_run.text = text_run_model.text
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if text_run_model.font:
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self.apply_font(text_run.font, text_run_model.font)
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def apply_border_radius_to_shape(self, shape: Shape, border_radius: Optional[int]):
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if not border_radius:
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return
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try:
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normalized_border_radius = Pt(border_radius) / min(
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shape.width, shape.height
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)
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shape.adjustments[0] = normalized_border_radius
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except:
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print("Could not apply border radius.")
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def apply_fill_to_shape(self, shape: Shape, fill: Optional[PptxFillModel] = None):
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if not fill:
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shape.fill.background()
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else:
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shape.fill.solid()
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shape.fill.fore_color.rgb = RGBColor.from_string(fill.color)
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def apply_stroke_to_shape(
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self, shape: Shape, stroke: Optional[PptxStrokeModel] = None
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):
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if not stroke or stroke.thickness == 0:
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shape.line.fill.background()
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else:
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shape.line.fill.solid()
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shape.line.fill.fore_color.rgb = RGBColor.from_string(stroke.color)
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shape.line.width = Pt(stroke.thickness)
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def apply_shadow_to_shape(
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self, shape: Shape, shadow: Optional[PptxShadowModel] = None
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):
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# Access the XML for the shape
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sp_element = shape._element
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sp_pr = sp_element.xpath("p:spPr")[0] # Shape properties XML element
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nsmap = sp_pr.nsmap
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# # Remove existing shadow effects if present
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effect_list = sp_pr.find("a:effectLst", namespaces=nsmap)
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if effect_list:
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old_shadow = effect_list.find("a:outerShdw")
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if old_shadow:
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effect_list.remove(
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old_shadow, namespaces=nsmap
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) # Remove the old shadow
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if not shadow:
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return
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if not effect_list:
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effect_list = etree.SubElement(
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sp_pr, f"{{{nsmap['a']}}}effectLst", nsmap=nsmap
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)
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outer_shadow = etree.SubElement(
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effect_list,
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f"{{{nsmap['a']}}}outerShdw",
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{
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"blurRad": f"{Pt(shadow.radius)}",
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"dir": f"{shadow.angle * 1000}",
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"dist": f"{Pt(shadow.offset)}",
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"rotWithShape": "0",
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},
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nsmap=nsmap,
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)
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color_element = etree.SubElement(
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outer_shadow,
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f"{{{nsmap['a']}}}srgbClr",
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{"val": f"{shadow.color}"},
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nsmap=nsmap,
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)
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etree.SubElement(
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color_element,
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f"{{{nsmap['a']}}}alpha",
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{"val": f"{int(shadow.opacity * 100000)}"},
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nsmap=nsmap,
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)
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def get_margined_position(
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self, position: PptxPositionModel, margin: Optional[PptxSpacingModel]
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) -> PptxPositionModel:
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if not margin:
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return position
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left = position.left + margin.left
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top = position.top + margin.top
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width = max(position.width - margin.left - margin.right, 0)
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height = max(position.height - margin.top - margin.bottom, 0)
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return PptxPositionModel(left=left, top=top, width=width, height=height)
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def apply_margin_to_text_box(
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self, text_frame: TextFrame, margin: Optional[PptxSpacingModel]
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) -> PptxPositionModel:
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text_frame.margin_left = Pt(margin.left if margin else 0)
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text_frame.margin_right = Pt(margin.right if margin else 0)
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text_frame.margin_top = Pt(margin.top if margin else 0)
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text_frame.margin_bottom = Pt(margin.bottom if margin else 0)
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def apply_spacing_to_paragraph(
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self, paragraph: _Paragraph, spacing: PptxSpacingModel
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):
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paragraph.space_before = Pt(spacing.top)
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paragraph.space_after = Pt(spacing.bottom)
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def apply_font_to_paragraph(self, paragraph: _Paragraph, font: PptxFontModel):
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self.apply_font(paragraph.font, font)
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def apply_font(self, font: Font, font_model: PptxFontModel):
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font.name = font_model.name
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font.color.rgb = RGBColor.from_string(font_model.color)
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font.bold = font_model.bold
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font.italic = font_model.italic
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font.size = Pt(font_model.size)
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def save(self, path: str):
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self._ppt.save(path)
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