mirror of
https://github.com/storytold/pdfcraft.git
synced 2026-11-08 03:54:35 +00:00
Zinadin Zidan
7e8551e4bc
page_add_text and content_update took only RGB, so text added to a CMYK print file painted 0 0 0 rg, rich black on press. They now also take gray (0 to 1) or cmyk ([c, m, y, k]), painted with g or k and kept in /PCAdded as /Gray or /CMYK beside /Color, which holds the matching look. An ink applies only while the colour still shows its look: picking another colour, also in the Format panel, drops it for good. RGB text is written byte for byte as before, and a stored ink that doesn't match its colour is ignored.
90 lines
3.0 KiB
Rust
90 lines
3.0 KiB
Rust
//! Edit a PDF ▸ Add content: text and images added as page content (execution plan M7.4).
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//!
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//! Each added item is its own content stream on the page, tagged `/PCMark /Added`, with its
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//! parameters (text, font, size, colour, alignment, box; or image and box) kept in the stream
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//! dictionary under `/PCAdded`. That keeps the item editable later (move, resize, retype,
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//! reformat, delete) without content-stream surgery, while every viewer sees ordinary page
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//! content. Boxes are in display space (points, origin at the bottom-left of the page as shown,
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//! after `/UserUnit` and `/Rotate`), so items stay upright on rotated pages; an item records the
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//! `/UserUnit` it was written for.
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use std::collections::{HashMap, HashSet};
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use pdfcraft_cos::{Dict, Document, ObjRef, Object, PdfString, Stream};
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use pdfcraft_fonts::{
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GlyphError, GlyphOutline, ShapedCluster, ShapedScript, Std14, literal, shape_arabic, shape_hebrew, shape_thai, shaped_glyph, win_ansi,
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};
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use unicode_bidi::{Level, ParagraphBidiInfo};
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use crate::{EditError, MarkKind, check, contents, matrix_number, n, page_list, place_tagged};
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mod draw;
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mod layout;
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mod store;
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mod types;
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#[cfg(test)]
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use draw::{GLYPHS_PER_FONT, LaidLine, draw_laid_shaped};
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#[cfg(test)]
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use layout::Piece;
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#[cfg(test)]
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pub(crate) use layout::WRAP_CALLS;
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pub use layout::{PASTE_STEP, first_undrawable, lines, paste_place, paste_rect, text_rect, text_width};
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pub use store::{add_content, delete_content, isolate_content, list_added, scan_markers, update_content};
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pub use types::{Added, AddedImage, AddedText, Align, CHAR_SPACING_LIMIT, Family, Ink, MarkerScan};
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#[derive(Clone, Debug, PartialEq)]
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pub enum Content {
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Text(AddedText),
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Image(AddedImage),
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}
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impl Content {
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pub fn rect(&self) -> [f64; 4] {
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match self {
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Content::Text(t) => t.rect,
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Content::Image(i) => i.rect,
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}
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}
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/// The same item with its box and text size scaled by `factor`.
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fn scaled(self, factor: f64) -> Content {
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match self {
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_ if factor == 1.0 => self,
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Content::Text(t) => {
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Content::Text(AddedText { rect: t.rect.map(|v| v * factor), size: t.size * factor, char_spacing: t.char_spacing * factor, ..t })
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}
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Content::Image(i) => Content::Image(AddedImage { rect: i.rect.map(|v| v * factor), ..i }),
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}
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}
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/// The same item moved/resized to `rect` (text keeps its computed height).
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pub fn with_rect(&self, rect: [f64; 4]) -> Content {
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match self {
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Content::Text(t) => Content::Text(AddedText { rect, ..t.clone() }),
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Content::Image(i) => Content::Image(AddedImage { rect, ..i.clone() }),
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}
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}
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}
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fn align_code(a: Align) -> i64 {
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match a {
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Align::Left => 0,
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Align::Center => 1,
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Align::Right => 2,
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Align::Justify => 3,
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}
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}
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fn align_from(code: Option<i64>) -> Align {
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match code {
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Some(1) => Align::Center,
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Some(2) => Align::Right,
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Some(3) => Align::Justify,
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_ => Align::Left,
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}
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}
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#[cfg(test)]
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mod arabic_tests;
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