Add StructuredText.snap to snap selection points to text lines.

ArtifexSoftware · Jan 27, 2025 · 02782e6 · 02782e6
1 parent 3c6d33c
commit 02782e6
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Showing 3 changed files with 23 additions and 3 deletions.
diff --git a/src/mupdf-wasm.d.ts b/src/mupdf-wasm.d.ts
@@ -243,6 +243,7 @@ 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_snap_selection(text: Pointer<"fz_stext_page">, a: Pointer<"fz_point">, b: Pointer<"fz_point">, mode: number): Pointer<"fz_quad">,
 	_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_print_stext_page_as_html(page: Pointer<"fz_stext_page">, id: number): Pointer<"char">,

diff --git a/src/mupdf.c b/src/mupdf.c
@@ -1061,6 +1061,12 @@ 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
+fz_quad * wasm_snap_selection(fz_stext_page *text, fz_point *a, fz_point *b, int mode)
+{
+	QUAD(fz_snap_selection, text, a, b, mode);
+}
+
 EXPORT
 char * wasm_copy_selection(fz_stext_page *text, fz_point *a, fz_point *b)
 {

diff --git a/src/mupdf.ts b/src/mupdf.ts
@@ -1300,12 +1300,20 @@ interface StructuredTextWalker {
 	endTextBlock?(): void
 }
 
+type SelectMode = "chars" | "words" | "lines"
+
 export class StructuredText extends Userdata<"fz_stext_page"> {
 	static override readonly _drop = libmupdf._wasm_drop_stext_page
 
-	static readonly SELECT_CHARS = 0
-	static readonly SELECT_WORDS = 1
-	static readonly SELECT_LINES = 2
+	static readonly SELECT_MODE: SelectMode[] = [
+		"chars",
+		"words",
+		"lines"
+	]
+
+	static readonly SELECT_CHARS = "chars"
+	static readonly SELECT_WORDS = "words"
+	static readonly SELECT_LINES = "lines"
 
 	walk(walker: StructuredTextWalker) {
 		let block = libmupdf._wasm_stext_page_get_first_block(this.pointer)
@@ -1373,6 +1381,11 @@ export class StructuredText extends Userdata<"fz_stext_page"> {
 		return fromStringFree(libmupdf._wasm_print_stext_page_as_text(this.pointer))
 	}
 
+	snap(p: Point, q: Point, mode: SelectMode): Quad {
+		let mm = ENUM<SelectMode>(mode, StructuredText.SELECT_MODE)
+		return fromQuad(libmupdf._wasm_snap_selection(this.pointer, POINT(p), POINT2(q), mm))
+	}
+
 	copy(p: Point, q: Point): string {
 		return fromStringFree(libmupdf._wasm_copy_selection(this.pointer, POINT(p), POINT2(q)))
 	}