feat: preview PDF links inline with first-page thumbnail and full pager

Adds MediaUrlPdf / PdfSegment to the rich-text pipeline so PDF URLs (detected by .pdf extension, NIP-92 imeta m tag, or application/pdf Content-Type) render a card showing the first page, filename, and page count. Tapping opens a full-screen HorizontalPager over every page rendered on demand with PdfRenderer. Long-press surfaces the existing share menu. Uses only the built-in Android PdfRenderer; no new dependencies. Desktop continues to fall back to a clickable link.
2026-04-18 23:06:49 +00:00
parent 8c71d490a7
commit ecdbc80fc1
11 changed files with 772 additions and 11 deletions
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.commons.richtext
+
+import com.vitorpamplona.amethyst.commons.model.EmptyTagList
+import com.vitorpamplona.amethyst.commons.model.ImmutableListOfLists
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+
+class PdfParserTest {
+    @Test
+    fun detectsPdfByExtension() {
+        val url = "https://example.com/docs/paper.pdf"
+        val state = RichTextParser().parseText(url, EmptyTagList, null)
+
+        val pdfMedia = state.mediaForPager[url]
+        assertTrue(pdfMedia is MediaUrlPdf, "Expected MediaUrlPdf for .pdf URL")
+
+        val segment = state.paragraphs[0].words[0]
+        assertTrue(segment is PdfSegment, "Expected PdfSegment for .pdf URL, got ${segment::class.simpleName}")
+        assertEquals(url, segment.segmentText)
+    }
+
+    @Test
+    fun detectsPdfFromImetaMimeTypeWithoutExtension() {
+        val url = "https://files.example.com/abcd1234"
+        val tags =
+            ImmutableListOfLists(
+                arrayOf(
+                    arrayOf("imeta", "url $url", "m application/pdf"),
+                ),
+            )
+
+        val state = RichTextParser().parseText(url, tags, null)
+
+        val pdfMedia = state.mediaForPager[url]
+        assertTrue(pdfMedia is MediaUrlPdf, "Expected MediaUrlPdf from imeta MIME tag")
+        assertEquals("application/pdf", (pdfMedia as MediaUrlPdf).mimeType)
+
+        val segment = state.paragraphs[0].words[0]
+        assertTrue(segment is PdfSegment, "Expected PdfSegment from imeta MIME tag, got ${segment::class.simpleName}")
+    }
+
+    @Test
+    fun isPdfUrlHelperMatchesPdfExtension() {
+        assertTrue(RichTextParser.isPdfUrl("https://example.com/doc.pdf"))
+        assertTrue(RichTextParser.isPdfUrl("https://example.com/doc.PDF"))
+        assertTrue(RichTextParser.isPdfUrl("https://example.com/doc.pdf?sig=abc"))
+    }
+}