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fix(ui): Update previews the page without the marks it replaces

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Update Background, Update Watermark and Update Header and Footer
previewed the new marks on the page's thumbnail, which still has the
marks Update replaces. A pale yellow background updated to light blue
showed a muddy teal (the blue multiplied onto the yellow), and a new
watermark or header was drawn over the old one. The applied result was
right; only the preview was wrong.

In Update, the preview now draws the page without its marks of that
kind. The engine removes them on a copy of the document
(Document::page_without_marks, read-only like the other preview layers),
and the dialog renders that page off the UI thread at the preview's
size, showing a blank sheet until it arrives. Add, and pages without
marks of that kind, keep the thumbnail.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
alehel
2026-10-25 21:23:17 +01:00
co-authored by Claude Opus 5.5
parent 833cd63c8a
commit 2b83ae6a7a
7 changed files with 294 additions and 13 deletions
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parity/acrobat-features.toml
+6 -6
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@@ -2423,8 +2423,8 @@ milestone = "M7"
status = "shipped"
commands = ["edit.header_footer"]
tools = ["doc_header_footer"]
evidence = ["crates/ui-egui/tests/it/marks.rs::header_and_footer_dialog_inserts_tokens_and_applies_to_a_subset", "crates/edit/src/tests.rs::header_and_footer_are_drawn_in_display_space_and_wrap_the_original_content", "crates/engine/src/tests.rs::headers_footers_watermarks_and_backgrounds_show_update_and_remove", "crates/ui-egui/tests/it/marks.rs::the_preview_shows_the_page_the_range_selects_under_the_marks"]
notes = "Standard faces only: Helvetica, Times or Courier (#3754; no bold, italic or embedded fonts yet); drawn in display space on rotated pages; artifact-tagged; the dialog previews the text over the page's own thumbnail (the current page, or the first one the range selects), in the interface font and with tokens unexpanded"
evidence = ["crates/ui-egui/tests/it/marks.rs::header_and_footer_dialog_inserts_tokens_and_applies_to_a_subset", "crates/edit/src/tests.rs::header_and_footer_are_drawn_in_display_space_and_wrap_the_original_content", "crates/engine/src/tests.rs::headers_footers_watermarks_and_backgrounds_show_update_and_remove", "crates/ui-egui/tests/it/marks.rs::the_preview_shows_the_page_the_range_selects_under_the_marks", "crates/ui-egui/tests/it/marks.rs::update_previews_the_page_without_the_marks_it_replaces", "crates/engine/src/tests.rs::update_previews_on_the_page_without_the_marks_it_replaces"]
notes = "Standard faces only: Helvetica, Times or Courier (#3754; no bold, italic or embedded fonts yet); drawn in display space on rotated pages; artifact-tagged; the dialog previews the text over the page's own thumbnail (the current page, or the first one the range selects), in the interface font and with tokens unexpanded; Update previews it on the page without the headers and footers it replaces"
[[feature]]
id = "edit.header-footer-update-remove"
@@ -2483,8 +2483,8 @@ milestone = "M7"
status = "shipped"
commands = ["edit.watermark"]
tools = ["doc_watermark"]
evidence = ["crates/edit/src/tests.rs::watermarks_rotate_fade_and_can_go_behind", "crates/ui-egui/tests/it/marks.rs::watermark_and_background_dialogs", "crates/automation/tests/it/automation.rs::headers_watermarks_and_backgrounds_through_tools", "crates/ui-egui/tests/it/marks.rs::the_preview_shows_the_page_the_range_selects_under_the_marks"]
notes = "Helvetica; fit-to-page or a size; the dialog previews it over the page's own thumbnail, always on top (a watermark behind the page is not drawn under its content there)"
evidence = ["crates/edit/src/tests.rs::watermarks_rotate_fade_and_can_go_behind", "crates/ui-egui/tests/it/marks.rs::watermark_and_background_dialogs", "crates/automation/tests/it/automation.rs::headers_watermarks_and_backgrounds_through_tools", "crates/ui-egui/tests/it/marks.rs::the_preview_shows_the_page_the_range_selects_under_the_marks", "crates/ui-egui/tests/it/marks.rs::update_previews_the_page_without_the_marks_it_replaces", "crates/engine/src/tests.rs::update_previews_on_the_page_without_the_marks_it_replaces"]
notes = "Helvetica; fit-to-page or a size; the dialog previews it over the page's own thumbnail, always on top (a watermark behind the page is not drawn under its content there); Update previews on the page without the watermarks it replaces"
[[feature]]
id = "edit.watermark-add-file"
@@ -2531,8 +2531,8 @@ milestone = "M7"
status = "shipped"
commands = ["edit.background"]
tools = ["doc_background"]
evidence = ["crates/ui-egui/tests/it/marks.rs::watermark_and_background_dialogs", "crates/engine/src/tests.rs::headers_footers_watermarks_and_backgrounds_show_update_and_remove", "crates/engine/src/tests.rs::backgrounds_and_watermarks_from_files", "crates/ui-egui/tests/it/marks.rs::backgrounds_and_watermarks_from_a_file", "crates/organize/src/tests.rs::a_page_becomes_a_form_xobject_upright", "crates/ui-egui/tests/it/marks.rs::the_preview_shows_the_page_the_range_selects_under_the_marks"]
notes = "colour, or a picture from a file (an image or a page of a PDF) scaled relative to the page; the dialog previews a colour as a tint of the page's own thumbnail (opaque pictures on the page are tinted there too, not in the result), a file as its frame and name"
evidence = ["crates/ui-egui/tests/it/marks.rs::watermark_and_background_dialogs", "crates/engine/src/tests.rs::headers_footers_watermarks_and_backgrounds_show_update_and_remove", "crates/engine/src/tests.rs::backgrounds_and_watermarks_from_files", "crates/ui-egui/tests/it/marks.rs::backgrounds_and_watermarks_from_a_file", "crates/organize/src/tests.rs::a_page_becomes_a_form_xobject_upright", "crates/ui-egui/tests/it/marks.rs::the_preview_shows_the_page_the_range_selects_under_the_marks", "crates/ui-egui/tests/it/marks.rs::update_previews_the_page_without_the_marks_it_replaces", "crates/engine/src/tests.rs::update_previews_on_the_page_without_the_marks_it_replaces"]
notes = "colour, or a picture from a file (an image or a page of a PDF) scaled relative to the page; the dialog previews a colour as a tint of the page's own thumbnail (opaque pictures on the page are tinted there too, not in the result), a file as its frame and name; Update previews on the page without the backgrounds it replaces, not tinting the old one"
[[feature]]
id = "edit.background-update-remove"