Fit a document to the screen, as Android does

[andiwand]

Stacked on #156, which is stacked on #155 — this branch adds only its own commit.

What the two apps actually send odrcore

CoreLoader.kt and CoreWrapper.swift, side by side:

	OpenDocument.droid	here, before	here, now
embedImages	false	false	false
embedShippedResources	true	unset (default true)	true
relativeResourcePaths	false	false	false
textDocumentMargin	the pagination setting, default true	true	true
editable	editable	editable	editable
viewport	unset → automatic	unset → automatic	unset → automatic

So the config was already the same in effect, on the same odrcore (6.6.0) — embedShippedResources is the one line that was left implicit, and it is spelled out now. Android's textDocumentMargin follows a user setting we have no equivalent for; its default is true, which is what we pass.

The HTML that comes back is therefore identical. I checked what odrcore emits for each fixture:

fixture	viewport meta
test.odt	width=device-width,user-scalable=yes
test.odp	width=device-width,user-scalable=yes
test.ods	width=device-width,initial-scale=1.0,user-scalable=yes
test.csv	width=device-width,initial-scale=1.0,user-scalable=yes

Paged content leaves the scale out on purpose; reflowing content names it.

Where the two readers part

Leaving the scale out only means "fit the width" to a web view in overview mode. PageView.kt sets loadWithOverviewMode = true and useWideViewPort = true, so Android zooms a page out until its full width is on screen. WKWebView has no such setting and reads width=device-width literally: lay out at screen width, let the rest overflow. A letter-wide page ran off the right edge of every iPhone — the clipped text is visible in the screenshots on #155.

A script at document end gives the viewport meta the width the page actually needs, which is overview mode by the only means iOS has. A page that names its own scale is left alone, so spreadsheets and csvs still open at 100% exactly as they do on Android.

Checked in the simulator

iPhone 17 Pro on iOS 26.0 and iPhone 16 Pro on iOS 18.4:

• test.odt — the page now fits the screen with odrcore's gutter around it, and full lines are readable instead of being cut off mid-sentence. Pinch to zoom still works.
• test.ods — unchanged, opens at actual size.

Unit tests pass and scripts/format.sh --check is clean.

🤖 Generated with Claude Code

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