kua-agent
6610acfa44
- Services/PdfRedactText.cs: strip text whose origin falls inside a CoverAnnotation from the page content stream at save time, hooked into PdfBurn.DrawAnnotationsIntoDoc. Fixes edited values staying recoverable by text extraction. - Themes/MMD.xaml replaces all thirteen themes; picker and accent strip removed; no dark mode. - Rename KillerPDF -> MMD PDF across code, resources, packaging and locale strings; new icon. - Remove the upstream author credit and the in-app install button.
46 lines
2.2 KiB
C#
46 lines
2.2 KiB
C#
using PdfPigDoc = UglyToad.PdfPig.PdfDocument;
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namespace MmdPdf.Services
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{
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// ============================================================
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// Image placement extraction for the display dark mode (#135
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// follow-up: pictures keep their real colors while the page
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// inverts). Pure functions over an OPEN PdfPig document - the
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// caller owns the open/dispose, because a held handle on the
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// temp file would block the save-time file swap.
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// ============================================================
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internal static class PdfImages
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{
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/// <summary>
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/// The page's image bounding boxes as fractions of the unrotated page, top-left origin
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/// (PdfPig reports PDF points, bottom-left origin - the same y-flip the annotation
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/// pipeline uses). Fractional so one cached set serves every render resolution, and
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/// computed against the UNROTATED page because the render sites apply the display
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/// inversion before the pixel-buffer rotation. pageIndex is 0-based (PdfPig is 1-based).
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/// </summary>
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internal static BitmapHelpers.FracRect[] GetFracRects(PdfPigDoc doc, int pageIndex)
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{
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var page = doc.GetPage(pageIndex + 1);
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double pw = page.Width, ph = page.Height;
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if (pw <= 0 || ph <= 0) return [];
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var list = new List<BitmapHelpers.FracRect>();
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foreach (var img in page.GetImages())
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{
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var b = img.BoundingBox; // Bounds is obsolete in current PdfPig
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double l = b.Left / pw, r = b.Right / pw;
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double t = (ph - b.Top) / ph, bo = (ph - b.Bottom) / ph;
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if (r < l) { var tmp = l; l = r; r = tmp; }
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if (bo < t) { var tmp = t; t = bo; bo = tmp; }
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l = Clamp01(l); r = Clamp01(r);
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t = Clamp01(t); bo = Clamp01(bo);
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if (r - l <= 0 || bo - t <= 0) continue; // degenerate or fully off-page
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list.Add(new BitmapHelpers.FracRect(l, t, r, bo));
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}
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return list.ToArray();
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}
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private static double Clamp01(double v) => v < 0 ? 0 : (v > 1 ? 1 : v);
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}
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}
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