The diff and merge viewers had no overview lane, so changes outside the viewport were invisible. The scrollbar now marks every change, coloured by type (modified, inserted, deleted, conflict), in the side-by-side view (both panes), the aligned view (one stripe over the shared scroller), the unified view and the three-way merge editor; clicking a mark jumps to the change. Marks span the lane's width from the first to the last changed line with a 2px minimum. The colours are new --diff-*-stripe theme tokens (Darcula, Light and High-contrast values), mapped from ERROR_STRIPE_COLOR on .icls import and set in the Harbor Night theme template.
Part of #1505
Co-authored-by: jaw52 <[email protected]>
The selection is drawn in a layer behind the text, so any range with its own background (find
matches, warnings in light schemes, usages, semantic backgrounds) hid it: selected text there
kept its yellow or other highlight. Selected text is now also marked in the innermost span with
the selection colour, in text editors, notebook cells and the VCS viewers.
Blocks that were moved unchanged, re-indented or moved and then edited are paired across the split diff: each side gets a link to the other (keyboard accessible), moved lines carry a left accent bar, edits inside a moved block get word-level highlights, and the toolbar counts moved blocks and whitespace-only changes. Staging and reverting still work on the original hunks.
Co-authored-by: shohruh-genius <[email protected]>
Opaque diff line and word backgrounds painted over CodeMirror's selection layer, so selected text in a diff was invisible. Text-area diff colours are now translucent mixes of the same tokens (gutters stay opaque), and the left pane's changed text uses the deleted colour.
Co-authored-by: a-rookie-of-C-language <[email protected]>
* feat(vcs): IDEA's diff algorithm and change colouring in the diff viewer
Port IntelliJ's text comparison to TypeScript (src/features/vcs/comparison):
Myers/patience LCS with unique-element discarding, ByLine (smart matching
that skips unimportant lines, chunk optimizer, second-step correction),
ByWord (word chunks, punctuation matching, whitespace policies, line block
splitting) and ComparisonManager's compareLinesInner / processBlocks. The
port runs IntelliJ's own LineComparisonUtilTest, WordComparisonUtilTest and
SplitComparisonUtilTest cases (459 runs), converted to ideaCases.json.
MergeView chunks now come straight from these line fragments, with the
inner word fragments as chunk changes, instead of @codemirror/merge's
presentable diff. Revert and >> / << replace lines as
DiffUtil.applyModification does.
Colour changes as IDEA does: modified (blue), inserted (green) and deleted
(grey) by chunk type, a lighter line background for chunks whose words were
compared, each word fragment in its own type at full line height, a thin
bar for a fragment empty on one side, and the colours carried into the
gutters and the divider bands. New --diff-modified / --diff-inserted /
--diff-deleted theme tokens, imported from .icls DIFF_* attributes.
Add a Playwright suite over a generated git repository of diff cases,
including 10,000-line files, in every viewer mode.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
* fix(vcs): preserve unified revert boundaries and bound large diffs
---------
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: l0ng-ai <[email protected]>
The VCS viewers (diff, merge, local history) hard-coded the default mono
font, size and line height, so Settings > Editor > Font had no effect on
them. Read the editor font variables like the main editor does, and apply
fontExtension next to the caret, kept in step with the settings.
Co-authored-by: Claude Opus 5.5 <[email protected]>
The side-by-side diff gets two independent options. Synchronize Scrolling (toolbar lock, also in the settings menu, on by default) scrolls both panes together; Align Changes (settings menu, off by default) pads the panes so changes line up. With Align Changes off, the panes keep their own heights and a divider of curved bands joins each change, with arrows to apply it; scrolling one pane moves the other through the matching change (anchored at a third of the height), including caret moves and the wheel over the divider. Scroll mapping and the divider look up changes by binary search, so large files with thousands of changes scroll smoothly.
Claude-Session: https://claude.ai/code/session_01Dq6jQQn8ZhRfkkyj3PRutA
Co-authored-by: jaw52 <[email protected]>
Find in the diff viewer (⌘F / ⌘R / ⌘G) opens the editor's find bar instead of CodeMirror's search panel: same field, Match Case / Words / Regex, counter, navigation, filter menu and highlights. In the side-by-side viewer the bar sits over the side with the caret, Replace is offered only on editable sides, and the shortcuts come from the keymap. Esc closes the bar even while a match is selected.
Claude-Session: https://claude.ai/code/session_01Dq6jQQn8ZhRfkkyj3PRutA
Co-authored-by: jaw52 <[email protected]>
Settings › Editor › General › Appearance gets "Use smooth caret blinking" and "Use smooth caret movement" (Snappy / Gliding), both off by default. Smooth movement animates only navigation and clicks; typing, edits and scrolling moves stay instant, and reduced motion turns it off. The diff and merge viewers now use the editor's caret and follow these settings instead of CodeMirror's default caret. Also translates a select's value shown while its checkbox is unchecked.
Claude-Session: https://claude.ai/code/session_01Dq6jQQn8ZhRfkkyj3PRutA
Co-authored-by: jaw52 <[email protected]>
Read-only revision panes inherited the workbench's user-select: none and had no tab stop, so text couldn't be selected with the mouse or keyboard or copied. The viewer content now allows text selection and read-only panes take focus; editing stays blocked.
Once focusable, these panes picked up CodeMirror's dark-theme focused selection colour, which outranked the viewer's rule and made selected text unreadable in light themes; the viewer's selection rule now matches that specificity.
Co-authored-by: dvictor357 <[email protected]>
In long files several distant edits could collapse into one large replacement that highlighted unchanged lines, and multi-line changes showed per-line stripes.
Lines are now matched before character-level changes. The line diff is anchored on lines that occur once on both sides (patience-style), with a bounded diff only between anchors, so 50k-line files with distant edits keep separate chunks. Whole inserted or deleted lines render as continuous blocks; paired modified lines keep the line background plus word-level highlights, also inside multi-line chunks. Line decorations are built for the visible range only.
Co-authored-by: zzxzz12345 <[email protected]>
Claude-Session: https://claude.ai/code/session_01VUYsdXA2nkF5v6zsC93dpn
Root cause: the editor had no font weight settings, and the WebView rendering of JetBrains Mono looks lighter than IDEA (#32).
Fix (IDEA's Settings › Editor › Font › Typography Settings): configurable Main font weight and Bold font weight (defaults Regular 400 / Bold 700) via --fw-code / --fw-code-bold; colour-scheme bold/regular overrides still win; settings preview updates live. Replaces the Light-only 450/550 hard-coding.
Siblings covered: sticky lines, diff/merge, run console (ANSI bold), Find in Files, completion/parameter info/docs, database editor, debugger value popup, matched braces, terminal with "Use editor font".
Verified: scoped vitest, ide-core tests, in-app on macOS (settings UI, editor weight follows the setting end to end).
Claude-Session: https://claude.ai/code/session_01VUYsdXA2nkF5v6zsC93dpn
Jaw
l0ng-ai
Shohruh Ismoilovтаshohruh-genius
arookieofcтаa-rookie-of-C-language
Dimas Victorтаdvictor357
胡翀таzzxzz12345