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Image-row placeholder padding measured the already-rendered body. ANSI color sequences and encoded markup were counted as visible terminal cells. In SharpMUSH's styled logo/menu banner this produced 124 cells for a 117-column layout (ANSI standard), and 153 cells for a 134-column layout (truecolor), wrapping the trailing rules in SharpMUTerm.
Changes
Add shared DisplayWidth.OfAnsi and DisplayWidth.OfTagged helpers for already-formatted fragments. They reuse the existing VT tokenizer and tag/entity scanners instead of counting formatting syntax.
Preserve the literal-source contract of DisplayWidth.Of, MarkupText.DisplayWidth, and width-based truncation. Literal & remains five source cells; tagged & measures one text cell.
Carry the original run's width in optional EmitContext.SourceDisplayWidth, before encoding or nested emission; point carriers have zero width. Use it for MXP, Pueblo, HTML, BBCode, and Markdown picture placeholders.
Route all five picture emitters through DisplayWidth.Of(body, context). It prefers SourceDisplayWidth, including zero; otherwise it selects ANSI measurement or checks context.Format.IsTagged for tagged measurement. Other formats preserve literal fallback semantics.
Declare the tagged-fragment capability on MarkupFormat, rather than hardcoding format identities in the width helper. HTML, MXP, and Pueblo declare it. An additive Custom(name, encoding, isTagged) overload permits explicit custom opt-in; the existing two-argument overload stays untagged. IsTagged means the specific angle-bracket/comment/entity grammar used by OfTagged, not arbitrary tags or identical full protocol semantics. Literal-text encoding does not infer this capability; name-based format identity is unchanged.
Cover ANSI controls and strings, tags and entities, malformed/overlong input, joined emoji across formatting boundaries, CJK/combining text, manual-context fallbacks, and literal-source compatibility.
Keep the original styled/uncolored, split-run, and 117/134-column banner regressions.
Why source geometry is still needed
Formatted text and reserved picture cells can differ even with correct parsing. A supported inner GaugeMarkup wrapping abc emits only <GAUGE hp MAX=maxhp>. That fragment has zero text cells, but the figure has already reserved three source cells. A regression verifies those cells survive; reparsing the emitted body cannot recover replaced text.
The helpers measure text cells, not browser layout, image dimensions, or terminal cursor motion. They follow the existing UTF-8 tokenizer policy for C1 characters and do not parse Markdown or BBCode. Large control-string payloads are consumed without retaining them; visible text is combined in a pooled buffer so formatting boundaries do not split joined Unicode text.
Verification
Final Release solution build, including net10.0/net11.0 core targets: zero warnings/errors.
Full Release test suite: 1,696 passed, including 87 new helper/context/capability cases.
Red/green checks: 21 formatted-input cases failed with raw measurement; three manual-context image fallbacks failed before routing through the tagged helper; 18 context/format cases failed with a raw-body resolver before source-aware dispatch; five capability cases failed before explicit metadata and custom opt-in were implemented.
Independent source/API review and focused reruns passed: capability 22/22 and context 24/24 on the final capability update; earlier formatted width 41/41 and figure 32/32 reruns also passed.
CI-style whitespace checks and git diff --check passed.
Native AOT publish and smoke binary passed with no trim/AOT warnings.
Release package creation and core API compatibility against deployed 2.27.2 baseline passed.
Earlier server/client reproduction for the source-geometry fix: actual SharpMUSH renderer output replayed through SharpMUTerm at unchanged 117/134-column panes; all four before/after tests passed. The fixed output kept the rules inline and image contiguous.
This fixes emitted padding and supplies shared formatted-width helpers. SharpMUSH must consume a released fixed library version separately. This PR does not merge, release, or deploy anything.
Summary by CodeRabbit
New Features
Added display-width measurement for ANSI-formatted and tagged text, excluding formatting syntax while accounting for recognized entities.
Custom formats can declare whether they use tagged syntax.
Bug Fixes
Image placeholders now preserve their source width across formatting and text encoding, preventing extra blank cells and keeping picture rows aligned.
Documentation
Clarified how display width is measured for literal, ANSI-formatted, and tagged text, and which built-in formats support tagged syntax.
No actionable comments were generated in the recent review.
Walkthrough
The change adds display-width APIs for ANSI and tagged text, adds tagged-format metadata, and carries source display width in the emission context. Image-row emitters use the context when calculating padding. Tests cover width measurement and picture spacing across formats.
Changes
Format-aware width and picture spacing
Layer / File(s)
Summary
Format declarations and width measurement MarkupString/MarkupFormat.cs, MarkupString/EmitContext.cs, MarkupString/DisplayWidth.cs, MarkupString/DisplayWidth.Formatted.cs, MarkupString.Tests/TaggedFormatTests.cs, MarkupString.Tests/FormattedDisplayWidthTests.cs, MarkupString.Tests/ContextDisplayWidthTests.cs
MarkupFormat declares whether a format uses tagged syntax. DisplayWidth adds ANSI, tagged, and context-aware measurement. Tests cover format declarations, syntax handling, and source-width precedence.
The renderer sets source display width in the emission context, with point-markup runs set to zero. Image emitters use the context when calculating width. Tests cover padding, encoded text, nested emitters, and picture-row alignment.
Public API and usage documentation MarkupString/PublicAPI.Unshipped.txt, README.md, CHANGELOG.md
The API listing and README describe the new width methods, tagged-format metadata, and source-width behavior. The changelog records the additions and picture-spacing fixes.
sequenceDiagram
participant MarkupTextRenderer
participant ImageEmitter
participant DisplayWidth
MarkupTextRenderer->>ImageEmitter: Pass EmitContext with SourceDisplayWidth
ImageEmitter->>DisplayWidth: Measure body with context
DisplayWidth-->>ImageEmitter: Return source or formatted width
ImageEmitter->>ImageEmitter: Append row-padding spaces
LoadingMerge Risk: Minimal · up to b0aa5
Picture padding now uses source widths instead of counting styling syntax. No actionable merge-blocking risk remains.
Pre-merge checks: 5
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Description Check
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Title check
The title names the main defect and its cause: styled image placeholders were counting markup as display width. The changeset matches this. It adds DisplayWidth.OfAnsi and DisplayWidth.OfTagged, carri…
Docstring Coverage
Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentat…
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Full details: Title check
Explanation
The title names the main defect and its cause: styled image placeholders were counting markup as display width. The changeset matches this. It adds DisplayWidth.OfAnsi and DisplayWidth.OfTagged, carries SourceDisplayWidth through EmitContext, and updates the five picture emitters to use source width or format-based measurement. The regression tests cover styled picture rows and the 117 and 134 column layouts. The title is specific and concise, and it does not cover the API additions, which is expected.
Full details: Docstring Coverage
Explanation
Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentation-only edits and deletions within surviving functions are included; unchanged diff context and fully deleted functions are excluded. Analyzed 17 functions across 13 files.
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Prompt to fix all issues
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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
minimal, and validate.
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Write docstrings for the functions missing them to satisfy the coverage
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The documentation warning is addressed in b0aa5c0. It adds XML summaries to the touched emitter methods, scanner helpers and regression tests, with no executable changes. The Release build, all 1,696 tests, formatting and current-head CI pass. Please reevaluate the current head before merge.
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Problem
Image-row placeholder padding measured the already-rendered body. ANSI color sequences and encoded markup were counted as visible terminal cells. In SharpMUSH's styled logo/menu banner this produced 124 cells for a 117-column layout (ANSI standard), and 153 cells for a 134-column layout (truecolor), wrapping the trailing rules in SharpMUTerm.
Changes
DisplayWidth.OfAnsiandDisplayWidth.OfTaggedhelpers for already-formatted fragments. They reuse the existing VT tokenizer and tag/entity scanners instead of counting formatting syntax.DisplayWidth.Of,MarkupText.DisplayWidth, and width-based truncation. Literal&remains five source cells; tagged&measures one text cell.EmitContext.SourceDisplayWidth, before encoding or nested emission; point carriers have zero width. Use it for MXP, Pueblo, HTML, BBCode, and Markdown picture placeholders.DisplayWidth.Of(body, context). It prefersSourceDisplayWidth, including zero; otherwise it selects ANSI measurement or checkscontext.Format.IsTaggedfor tagged measurement. Other formats preserve literal fallback semantics.MarkupFormat, rather than hardcoding format identities in the width helper. HTML, MXP, and Pueblo declare it. An additiveCustom(name, encoding, isTagged)overload permits explicit custom opt-in; the existing two-argument overload stays untagged.IsTaggedmeans the specific angle-bracket/comment/entity grammar used byOfTagged, not arbitrary tags or identical full protocol semantics. Literal-text encoding does not infer this capability; name-based format identity is unchanged.Why source geometry is still needed
Formatted text and reserved picture cells can differ even with correct parsing. A supported inner
GaugeMarkupwrappingabcemits only<GAUGE hp MAX=maxhp>. That fragment has zero text cells, but the figure has already reserved three source cells. A regression verifies those cells survive; reparsing the emitted body cannot recover replaced text.The helpers measure text cells, not browser layout, image dimensions, or terminal cursor motion. They follow the existing UTF-8 tokenizer policy for C1 characters and do not parse Markdown or BBCode. Large control-string payloads are consumed without retaining them; visible text is combined in a pooled buffer so formatting boundaries do not split joined Unicode text.
Verification
git diff --checkpassed.This fixes emitted padding and supplies shared formatted-width helpers. SharpMUSH must consume a released fixed library version separately. This PR does not merge, release, or deploy anything.
Summary by CodeRabbit