From cb04a26148f386906e5acd37c3f3ddfea034b00e Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor.andersson@artifex.com>
Date: Wed, 10 Jul 2024 18:33:17 +0200
Subject: [PATCH] Issue #101: Implement StructuredText.copy and .highlight

---
 src/mupdf-wasm.d.ts |  2 ++
 src/mupdf.c         | 12 ++++++++++++
 src/mupdf.ts        | 19 +++++++++++++++++--
 3 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/src/mupdf-wasm.d.ts b/src/mupdf-wasm.d.ts
index 3943b5a..a178d8c 100644
--- a/src/mupdf-wasm.d.ts
+++ b/src/mupdf-wasm.d.ts
@@ -243,6 +243,8 @@ interface Libmupdf {
 	_wasm_close_document_writer(wri: Pointer<"fz_document_writer">): void,
 	_wasm_print_stext_page_as_json(page: Pointer<"fz_stext_page">, scale: number): Pointer<"char">,
 	_wasm_search_stext_page(text: Pointer<"fz_stext_page">, needle: Pointer<"char">, marks: Pointer<"int">, hits: Pointer<"fz_quad">, hit_max: number): number,
+	_wasm_copy_selection(text: Pointer<"fz_stext_page">, a: Pointer<"fz_point">, b: Pointer<"fz_point">): Pointer<"char">,
+	_wasm_highlight_selection(text: Pointer<"fz_stext_page">, a: Pointer<"fz_point">, b: Pointer<"fz_point">, hits: Pointer<"fz_quad">, n: number): number,
 	_wasm_open_document_with_buffer(magic: Pointer<"char">, buffer: Pointer<"fz_buffer">): Pointer<"any_document">,
 	_wasm_open_document_with_stream(magic: Pointer<"char">, stream: Pointer<"fz_stream">): Pointer<"any_document">,
 	_wasm_format_link_uri(doc: Pointer<"any_document">, ch: number, pg: number, ty: number, x: number, y: number, w: number, h: number, z: number): Pointer<"char">,
diff --git a/src/mupdf.c b/src/mupdf.c
index 12f1b07..918f401 100644
--- a/src/mupdf.c
+++ b/src/mupdf.c
@@ -849,6 +849,18 @@ int wasm_search_stext_page(fz_stext_page *text, char *needle, int *marks, fz_qua
 	INTEGER(fz_search_stext_page, text, needle, marks, hits, hit_max)
 }
 
+EXPORT
+char * wasm_copy_selection(fz_stext_page *text, fz_point *a, fz_point *b)
+{
+	POINTER(fz_copy_selection, text, *a, *b, 0);
+}
+
+EXPORT
+int wasm_highlight_selection(fz_stext_page *text, fz_point *a, fz_point *b, fz_quad *hits, int n)
+{
+	INTEGER(fz_highlight_selection, text, *a, *b, hits, n);
+}
+
 // --- Document ---
 
 EXPORT
diff --git a/src/mupdf.ts b/src/mupdf.ts
index 87c067e..fa1e6ef 100644
--- a/src/mupdf.ts
+++ b/src/mupdf.ts
@@ -1330,8 +1330,23 @@ export class StructuredText extends Userdata<"fz_stext_page"> {
 		return fromStringFree(libmupdf._wasm_print_stext_page_as_json(this.pointer, scale))
 	}
 
-	// TODO: highlight(a, b) -> quad[]
-	// TODO: copy(a, b) -> string
+	copy(p: Point, q: Point): string {
+		return fromStringFree(libmupdf._wasm_copy_selection(this.pointer, POINT(p), POINT2(q)))
+	}
+
+	highlight(p: Point, q: Point, max_hits = 100): Quad[] {
+		let hits = 0 as Pointer<"fz_quad">
+		let result: Quad[] = []
+		try {
+			hits = Malloc<"fz_quad">(32 * max_hits)
+			let n = libmupdf._wasm_highlight_selection(this.pointer, POINT(p), POINT2(q), hits, max_hits)
+			for (let i = 0; i < n; ++i)
+				result.push(fromQuad(hits + i * 32 as Pointer<"fz_quad">))
+		} finally {
+			Free(hits)
+		}
+		return result
+	}
 
 	search(needle: string, max_hits = 500) {
 		return runSearch(libmupdf._wasm_search_stext_page, this.pointer, needle, max_hits)