RFR: 8350203: [macos] Newlines and tabs are not ignored when drawing text to a Graphics2D object

[Daniel Gredler]

On Mon, 17 Feb 2025 14:06:53 GMT, Daniel Gredler <dgredler at openjdk.org> wrote:

> On other platforms like Windows and Linux, the `\n`, `\r` and `\t` characters are ignored when drawing text to a `Graphics2D` object. On macOS this is not currently the case.
> 
> See, for example, `CMap.getControlCodeGlyph(int, boolean)` or `RasterPrinterJob.removeControlChars(String)`.
> 
> This bug was found while running `test/jdk/java/awt/print/PrinterJob/PrintTextTest.java` on macOS.
> 
> The new test class passes on Linux, Windows and macOS.

Good news: it looks like it was possible to resolve the `0xFFFF` conflict on the HarfBuzz side by adjusting the HarfBuzz internal representation of AAT deleted glyphs. Amazingly quick turnaround from @behdad! I think we'll want to put this PR on hold until the next HarfBuzz upgrade. How often are dependencies like HarfBuzz upgraded? I saw we just completed one today, coincidentally.

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PR Comment: https://git.openjdk.org/jdk/pull/23665#issuecomment-2711714892