#!/usr/bin/env python # -*- coding: utf-8 -*- """ This implementation of FormField represents a text area. """ import typing import zlib from decimal import Decimal from borb.io.read.pdf_object import PDFObject from borb.io.read.types import Boolean from borb.io.read.types import Decimal as bDecimal from borb.io.read.types import Dictionary from borb.io.read.types import List from borb.io.read.types import Name from borb.io.read.types import Stream from borb.io.read.types import String from borb.pdf.canvas.color.color import Color from borb.pdf.canvas.color.color import HexColor from borb.pdf.canvas.color.color import RGBColor from borb.pdf.canvas.font.simple_font.font_type_1 import StandardType1Font from borb.pdf.canvas.geometry.rectangle import Rectangle from borb.pdf.canvas.layout.forms.form_field import FormField from borb.pdf.canvas.layout.layout_element import Alignment from borb.pdf.page.page import Page class TextArea(FormField): """ This implementation of FormField represents a text area. """ # # CONSTRUCTOR # def __init__( self, background_color: typing.Optional[Color] = None, border_bottom: bool = True, border_color: Color = HexColor("808080"), border_left: bool = True, border_radius_bottom_left: Decimal = Decimal(0), border_radius_bottom_right: Decimal = Decimal(0), border_radius_top_left: Decimal = Decimal(0), border_radius_top_right: Decimal = Decimal(0), border_right: bool = True, border_top: bool = True, border_width: Decimal = Decimal(1), default_value: str = "", field_name: typing.Optional[str] = None, font_color: Color = HexColor("000000"), font_size: typing.Optional[Decimal] = Decimal(12), horizontal_alignment: Alignment = Alignment.LEFT, margin_bottom: typing.Optional[Decimal] = Decimal(0), margin_left: typing.Optional[Decimal] = Decimal(0), margin_right: typing.Optional[Decimal] = Decimal(0), margin_top: typing.Optional[Decimal] = Decimal(0), number_of_lines: int = 5, padding_bottom: Decimal = Decimal(0), padding_left: Decimal = Decimal(0), padding_right: Decimal = Decimal(0), padding_top: Decimal = Decimal(0), value: str = "", vertical_alignment: Alignment = Alignment.TOP, ): super(TextArea, self).__init__( background_color=background_color, border_bottom=border_bottom, border_color=border_color, border_left=border_left, border_radius_bottom_left=border_radius_bottom_left, border_radius_bottom_right=border_radius_bottom_right, border_radius_top_left=border_radius_top_left, border_radius_top_right=border_radius_top_right, border_right=border_right, border_top=border_top, border_width=border_width, font="Helvetica", font_color=font_color, font_size=font_size, horizontal_alignment=horizontal_alignment, margin_bottom=margin_bottom, margin_left=margin_left, margin_right=margin_right, margin_top=margin_top, padding_bottom=padding_bottom, padding_left=padding_left, padding_right=padding_right, padding_top=padding_top, vertical_alignment=vertical_alignment, ) assert number_of_lines > 0 self._font_color = font_color self._value: str = value self._default_value: str = default_value self._number_of_lines: int = number_of_lines self._field_name: typing.Optional[str] = field_name self._widget_dictionary: typing.Optional[Dictionary] = None # # PRIVATE # def _get_content_box(self, available_space: Rectangle) -> Rectangle: assert self._font_size is not None line_height: Decimal = self._font_size * Decimal(1.2) return Rectangle( available_space.get_x(), available_space.get_y() + available_space.get_height() - line_height * self._number_of_lines, max(available_space.get_width(), Decimal(64)), line_height * self._number_of_lines, ) def _init_widget_dictionary(self, page: Page, layout_box: Rectangle) -> None: if self._widget_dictionary is not None: return root: typing.Optional[PDFObject] = page.get_root() assert root is not None assert isinstance(root, Dictionary) if "XRef" not in root: return # init page and font resources assert self._font_size is not None font_resource_name: Name = self._get_font_resource_name( StandardType1Font("Helvetica"), page ) # widget resource dictionary widget_resources: Dictionary = Dictionary() widget_resources.set_is_unique(True) widget_resources[Name("Font")] = page["Resources"]["Font"] # widget normal appearance widget_normal_appearance: Stream = Stream() widget_normal_appearance.set_is_unique(True) widget_normal_appearance[Name("Type")] = Name("XObject") widget_normal_appearance[Name("Subtype")] = Name("Form") widget_normal_appearance[Name("BBox")] = List().set_is_inline(True) widget_normal_appearance["BBox"].append(bDecimal(0)) widget_normal_appearance["BBox"].append(bDecimal(0)) widget_normal_appearance["BBox"].append(bDecimal(layout_box.width)) widget_normal_appearance["BBox"].append( bDecimal((self._font_size + 1) * self._number_of_lines) ) widget_normal_appearance[Name("Resources")] = widget_resources bts = b"/Tx BMC EMC" widget_normal_appearance[Name("DecodedBytes")] = bts widget_normal_appearance[Name("Bytes")] = zlib.compress(bts, 9) widget_normal_appearance[Name("Filter")] = Name("FlateDecode") widget_normal_appearance[Name("Length")] = bDecimal(len(bts)) # widget appearance dictionary widget_appearance_dictionary: Dictionary = Dictionary() widget_appearance_dictionary.set_is_unique(True) widget_appearance_dictionary[Name("N")] = widget_normal_appearance # get Catalog catalog: Dictionary = root["XRef"]["Trailer"]["Root"] # type: ignore[attr-defined] # widget dictionary # fmt: off self._widget_dictionary = Dictionary() self._widget_dictionary.set_is_unique(True) self._widget_dictionary[Name("Type")] = Name("Annot") self._widget_dictionary[Name("Subtype")] = Name("Widget") self._widget_dictionary[Name("F")] = bDecimal(4) self._widget_dictionary[Name("Rect")] = List().set_is_inline(True) self._widget_dictionary["Rect"].append(bDecimal(layout_box.x)) self._widget_dictionary["Rect"].append(bDecimal(layout_box.y + layout_box.height - (self._font_size + 1) * self._number_of_lines)) self._widget_dictionary["Rect"].append(bDecimal(layout_box.x + layout_box.width)) self._widget_dictionary["Rect"].append(bDecimal(layout_box.y + layout_box.height)) self._widget_dictionary[Name("FT")] = Name("Tx") self._widget_dictionary[Name("Ff")] = bDecimal(4096) self._widget_dictionary[Name("P")] = catalog self._widget_dictionary[Name("T")] = String(self._field_name or self._get_auto_generated_field_name(page)) self._widget_dictionary[Name("V")] = String(self._value) self._widget_dictionary[Name("DV")] = String(self._default_value) self._widget_dictionary[Name("DR")] = widget_resources # fmt: on # rendering instructions font_color_rgb: RGBColor = self._font_color.to_rgb() self._widget_dictionary[Name("DA")] = String( "%f %f %f rg /%s %f Tf" % ( float(font_color_rgb.red), float(font_color_rgb.green), float(font_color_rgb.blue), font_resource_name, float(self._font_size), ) ) self._widget_dictionary[Name("AP")] = widget_appearance_dictionary # append field to page /Annots if "Annots" not in page: page[Name("Annots")] = List() page["Annots"].append(self._widget_dictionary) # append field to catalog if "AcroForm" not in catalog: catalog[Name("AcroForm")] = Dictionary() catalog["AcroForm"][Name("Fields")] = List() catalog["AcroForm"][Name("DR")] = widget_resources catalog["AcroForm"][Name("NeedAppearances")] = Boolean(True) catalog["AcroForm"]["Fields"].append(self._widget_dictionary) def _paint_content_box(self, page: "Page", available_space: Rectangle) -> None: # determine layout rectangle cbox: Rectangle = self._get_content_box(available_space) # init self._widget_dictionary self._init_widget_dictionary(page, cbox) # set location # fmt: off assert self._font_size is not None if self._widget_dictionary is not None: self._widget_dictionary["AP"]["N"]["BBox"][2] = bDecimal(cbox.get_width()) self._widget_dictionary["AP"]["N"]["BBox"][3] = bDecimal(self._font_size) self._widget_dictionary["Rect"][0] = bDecimal(cbox.get_x()) self._widget_dictionary["Rect"][1] = bDecimal(cbox.get_y()) self._widget_dictionary["Rect"][2] = bDecimal(cbox.get_x() + cbox.get_width()) self._widget_dictionary["Rect"][3] = bDecimal(cbox.get_y() + cbox.get_height()) # fmt: on # # PUBLIC #