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diff mupdf-source/docs/examples/storytest.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/docs/examples/storytest.c	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,557 @@
+#include "mupdf/fitz.h"
+#include "mupdf/pdf.h"
+
+#include <string.h>
+#include <memory.h>
+
+const char snark[] =
+	"<!DOCTYPE html>"
+	"<style>"
+	"#a { margin: 30px; }"
+	"#b { margin: 20px; }"
+	"#c { margin: 5px; }"
+	"#a { border: 1px solid red; }"
+	"#b { border: 1px solid green; }"
+	"#c { border: 1px solid blue; }"
+	"</style>"
+	"<body>"
+	"<div id=\"a\">"
+	"A"
+	"</div>"
+	"<div id=\"b\">"
+	"<div id=\"c\">"
+	"C"
+	"</div>"
+	"</div>"
+	"<div style=\"text-align:center;\"><IMG width=\"300\" src=\"docs/examples/SnarkFront.svg\"></div>"
+	"<H1>The hunting of the Snark</H1>"
+	"<div style=\"text-align:center\"><IMG width=\"30\" src=\"docs/examples/huntingofthesnark.png\"></div>"
+	"<p>\"Just the place for a Snark!\" the Bellman cried,<br>"
+	"As he landed his crew with care;<br>"
+	"Supporting each man on the top of the tide<br>"
+	"By a finger entwined in his hair.</p>"
+
+	"<P>Just the place for a Snark! I have said it twice:<br>"
+	"That alone should encourage the crew.<br>"
+	"Just the place for a Snark! I have said it thrice:<br>"
+	"What I tell you three times is true.</p>"
+
+	"<p>The crew was complete: it included a Boots-<br>"
+	"A maker of Bonnets and Hoods-<br>"
+	"A Barrister, brought to arrange their disputes-<br>"
+	"And a Broker, to value their goods.</p>"
+
+	"<p>A Billiard-marker, whose skill was immense,<br>"
+	"Might perhaps have won more than his share-<br>"
+	"But a Banker, engaged at enormous expense,<br>"
+	"Had the whole of their cash in his care.</p>"
+
+	"<p>There was also a Beaver, that paced on the deck,<br>"
+	"Or would sit making lace in the bow:<br>"
+	"And had often (the Bellman said) saved them from wreck,<br>"
+	"Though none of the sailors knew how.</p>"
+
+	"<p>There was one who was famed for the number of things<br>"
+	"He forgot when he entered the ship:<br>"
+	"His umbrella, his watch, all his jewels and rings,<br>"
+	"And the clothes he had bought for the trip.</p>"
+	"<div id=\"a\">"
+	"<p>He had forty-two boxes, all carefully packed,<br>"
+	"With his name painted clearly on each:<br>"
+	"But, since he omitted to mention the fact,<br>"
+	"They were all left behind on the beach.</p>"
+	"</div>"
+
+	"<p>The loss of his clothes hardly mattered, because<br>"
+	"He had seven coats on when he came,<br>"
+	"With three pair of boots-but the worst of it was,<br>"
+	"He had wholly forgotten his name.</p>"
+
+	"<p>He would answer to \"Hi!\" or to any loud cry,<br>"
+	"Such as \"Fry me!\" or \"Fritter my wig!\"<br>"
+	"To \"What-you-may-call-um!\" or \"What-was-his-name!\"<br>"
+	"But especially \"Thing-um-a-jig!\"</p>"
+
+	"<p>While, for those who preferred a more forcible word,<br>"
+	"He had different names from these:<br>"
+	"His intimate friends called him \"Candle-ends,\"<br>"
+	"And his enemies \"Toasted-cheese.\"</p>"
+
+	"<p>\"His form is ungainly-his intellect small-\"<br>"
+	"(So the Bellman would often remark)<br>"
+	"\"But his courage is perfect! And that, after all,<br>"
+	"Is the thing that one needs with a Snark.\"</p>"
+
+	"<p>He would joke with hyenas, returning their stare<br>"
+	"With an impudent wag of the head:<br>"
+	"And he once went a walk, paw-in-paw, with a bear,<br>"
+	"\"Just to keep up its spirits,\" he said.</p>"
+
+	"<p>He came as a Baker: but owned, when too late-<br>"
+	"And it drove the poor Bellman half-mad-<br>"
+	"He could only bake Bride-cake-for which, I may state,<br>"
+	"No materials were to be had.</p>"
+
+	"<p>The last of the crew needs especial remark,<br>"
+	"Though he looked an incredible dunce:<br>"
+	"He had just one idea-but, that one being \"Snark,\"<br>"
+	"The good Bellman engaged him at once.</p>"
+
+	"<p>He came as a Butcher: but gravely declared,<br>"
+	"When the ship had been sailing a week,<br>"
+	"He could only kill Beavers. The Bellman looked scared,<br>"
+	"And was almost too frightened to speak:</p>"
+
+	"<p>But at length he explained, in a tremulous tone,<br>"
+	"There was only one Beaver on board;<br>"
+	"And that was a tame one he had of his own,<br>"
+	"Whose death would be deeply deplored.</p>"
+
+	"<div id=\"b\">"
+	"<p>The Beaver, who happened to hear the remark,<br>"
+	"Protested, with tears in its eyes,<br>"
+	"That not even the rapture of hunting the Snark<br>"
+	"Could atone for that dismal surprise!</p>"
+	"</div>"
+
+	"<p style=\"-mupdf-leading:7pt;\">It strongly advised that the Butcher should be<br>"
+	"Conveyed in a separate ship:<br>"
+	"But the Bellman declared that would never agree<br>"
+	"With the plans he had made for the trip:</p>"
+
+	"<p style=\"-mupdf-leading:11pt;\">Navigation was always a difficult art,<br>"
+	"Though with only one ship and one bell:<br>"
+	"And he feared he must really decline, for his part,<br>"
+	"Undertaking another as well.</p>"
+
+	"<p style=\"-mupdf-leading:15pt;\">The Beaver's best course was, no doubt, to procure<br>"
+	"A second-hand dagger-proof coat-<br>"
+	"So the Baker advised it-and next, to insure<br>"
+	"Its life in some Office of note:</p>"
+
+	"<p style=\"-mupdf-leading:20pt;\">This the Banker suggested, and offered for hire<br>"
+	"(On moderate terms), or for sale,<br>"
+	"Two excellent Policies, one Against Fire,<br>"
+	"And one Against Damage From Hail.</p>"
+
+	"<p style=\"-mupdf-leading:30pt;\">Yet still, ever after that sorrowful day,<br>"
+	"Whenever the Butcher was by,<br>"
+	"The Beaver kept looking the opposite way,<br>"
+	"And appeared unaccountably shy.</p>"
+;
+
+#define MAX_CAST_MEMBERS 32
+
+typedef struct {
+	const char *title;
+	const char *director;
+	const char *year;
+	const char *cast[MAX_CAST_MEMBERS];
+} film_t;
+
+static const film_t films[] =
+{
+	{
+		"Pulp Fiction",
+		"Quentin Tarantino",
+		"1994",
+		{
+			"John Travolta",
+			"Samuel L Jackson",
+			"Uma Thurman",
+			"Bruce Willis",
+			"Ving Rhames",
+			"Harvey Keitel",
+			"Tim Roth",
+			"Bridget Fonda"
+		}
+	},
+
+	{
+		"The Usual Suspects",
+		"Bryan Singer",
+		"1995",
+		{
+			"Kevin Spacey",
+			"Gabriel Byrne",
+			"Chazz Palminteri",
+			"Benicio Del Toro",
+			"Kevin Pollak",
+			"Pete Postlethwaite",
+			"Steven Baldwin"
+		}
+
+	},
+
+	{
+		"Fight Club",
+		"David Fincher",
+		"1999",
+		{
+			"Brad Pitt",
+			"Edward Norton",
+			"Helena Bonham Carter"
+		}
+	}
+};
+
+const char *festival_template =
+	"<html><head><title>Why do we have a title? Why not?</title></head>"
+	"<body><h1 style=\"text-align:center\">Hook Norton Film Festival</h1>"
+	"<ol>"
+	"<li id=\"filmtemplate\">"
+	"<b id=\"filmtitle\"></b>"
+	"<dl>"
+	"<dt>Director<dd id=\"director\">"
+	"<dt>Release Year<dd id=\"filmyear\">"
+	"<dt>Cast<dd id=\"cast\">"
+	"</dl>"
+	"</li>"
+	"<ul>"
+	"</body></html";
+
+
+static int toc_rectfn(fz_context *ctx, void *ref, int num, fz_rect filled, fz_rect *rect, fz_matrix *ctm, fz_rect *mediabox)
+{
+	if (num == 0)
+	{
+		rect->x0 = 100;
+		rect->y0 = 200;
+		rect->x1 = 175;
+		rect->y1 = 300;
+	}
+	else
+	{
+		rect->x0 = 10;
+		rect->y0 = 50;
+		rect->x1 = 290;
+		rect->y1 = 350;
+	}
+	mediabox->x0 = 0;
+	mediabox->y0 = 0;
+	mediabox->x1 = 300;
+	mediabox->y1 = 400;
+	return 1;
+}
+
+static void toc_contentfn(fz_context *ctx, void *ref, const fz_write_story_positions *positions, fz_buffer *buffer)
+{
+	int i;
+	fz_append_string(ctx, buffer,
+			"<!DOCTYPE html>\n"
+			"<style>\n"
+			"#a { margin: 30px; }\n"
+			"#b { margin: 20px; }\n"
+			"#c { margin: 5px; }\n"
+			"#a { border: 1px solid red; }\n"
+			"#b { border: 1px solid green; }\n"
+			"#c { border: 1px solid blue; }\n"
+			"</style>\n"
+			"<body>\n"
+			"<h2>Contents</h2>\n"
+			"<ol>\n"
+			);
+	for (i=0; i<positions->num; ++i)
+	{
+		fz_write_story_position *position = &positions->positions[i];
+
+		fz_append_printf(ctx, buffer,
+				"	<li>page=%i depth=%i heading=%i id='%s' rect=(%f %f %f %f) text='<b>%s</b>' open_close=%i\n",
+				position->page_num,
+				position->element.depth,
+				position->element.heading,
+				(position->element.id) ? position->element.id : "",
+				position->element.rect.x0,
+				position->element.rect.y0,
+				position->element.rect.x1,
+				position->element.rect.y1,
+				(position->element.text) ? position->element.text : "",
+				position->element.open_close
+				);
+	}
+	fz_append_string(ctx, buffer, "</ol>\n");
+	fz_append_string(ctx, buffer,
+			"<h1>Section the first</h1>\n"
+			"<p>Blah.\n"
+			"<h1>Section the second</h1>\n"
+			"<p>Blah blah.\n"
+			"<h2>Subsection</h2>\n"
+			"<p>Blah blah blah.\n"
+			"<p>Blah blah blah.\n"
+			"<p>Blah blah blah.\n"
+			"<h1>Section the third</h1>\n"
+			"<p>Blah blah.\n"
+			"</body>\n"
+			);
+	{
+		const char *data = fz_string_from_buffer(ctx, buffer);
+		printf( "======== Html content: ========\n");
+		printf( "%s", data);
+		printf( "========\n");
+	}
+}
+
+static void toc_pagefn(fz_context *ctx, void *ref, int page_num, fz_rect mediabox, fz_device *dev, int after)
+{
+	fz_path *path = fz_new_path(ctx);
+	fz_matrix ctm = fz_identity;
+	printf("toc_pagefn(): ref=%p page_num=%i dev=%p after=%i\n", ref, page_num, dev, after);
+	if (after)
+	{
+		float rgb[3] = { 0.75, 0.25, 0.125};
+		fz_moveto(ctx, path, 50, 50);
+		fz_lineto(ctx, path, 100, 200);
+		fz_lineto(ctx, path, 50, 200);
+		fz_closepath(ctx, path);
+		fz_fill_path(ctx, dev, path, 0, ctm, fz_device_rgb(ctx), rgb, 0.9f /*alpha*/, fz_default_color_params);
+		fz_drop_path(ctx, path);
+	}
+	else
+	{
+		float rgb[3] = { 0.125, 0.25, 0.75};
+		fz_moveto(ctx, path, 50, 50);
+		fz_lineto(ctx, path, 50, 200);
+		fz_lineto(ctx, path, 100, 50);
+		fz_closepath(ctx, path);
+		fz_fill_path(ctx, dev, path, 0, ctm, fz_device_rgb(ctx), rgb, 0.9f /*alpha*/, fz_default_color_params);
+		fz_drop_path(ctx, path);
+	}
+}
+
+static void test_write_stabilized_story(fz_context *ctx)
+{
+	fz_document_writer *writer = fz_new_pdf_writer(ctx, "out_toc.pdf", "");
+	fz_write_stabilized_story(
+			ctx,
+			writer,
+			"" /*user_css*/,
+			11 /*em*/,
+			toc_contentfn,
+			NULL /*contentfn_ref*/,
+			toc_rectfn,
+			NULL /*rectfn_ref*/,
+			toc_pagefn /*pagefn*/,
+			NULL /*pagefn_ref*/,
+			NULL /* archive */
+			);
+	fz_close_document_writer(ctx, writer);
+	fz_drop_document_writer(ctx, writer);
+}
+
+int main(int argc, const char *argv[])
+{
+	fz_context *ctx;
+	fz_document_writer *writer = NULL;
+	fz_story *story = NULL;
+	fz_buffer *buf = NULL;
+	fz_device *dev = NULL;
+	fz_archive *archive = NULL;
+	fz_rect mediabox = { 0, 0, 512, 640 };
+	float margin = 10;
+	int more;
+
+	ctx = fz_new_context(NULL, NULL, FZ_STORE_DEFAULT);
+	if (ctx == NULL)
+	{
+		fprintf(stderr, "Failed to create context");
+		return 1;
+	}
+
+	fz_var(writer);
+	fz_var(story);
+	fz_var(buf);
+	fz_var(dev);
+	fz_var(archive);
+
+	/* First one made with precooked content. */
+	fz_try(ctx)
+	{
+		writer = fz_new_pdf_writer(ctx, "out.pdf", "");
+
+		buf = fz_new_buffer_from_copied_data(ctx, (unsigned char *)snark, strlen(snark)+1);
+
+		archive = fz_open_directory(ctx, ".");
+
+		story = fz_new_story(ctx, buf, "", 11, archive);
+
+		do
+		{
+			fz_rect where;
+			fz_rect filled;
+
+			where.x0 = mediabox.x0 + margin;
+			where.y0 = mediabox.y0 + margin;
+			where.x1 = mediabox.x1 - margin;
+			where.y1 = mediabox.y1 - margin;
+
+			dev = fz_begin_page(ctx, writer, mediabox);
+
+			more = fz_place_story(ctx, story, where, &filled);
+
+			fz_draw_story(ctx, story, dev, fz_identity);
+
+			fz_end_page(ctx, writer);
+		}
+		while (more);
+
+		fz_close_document_writer(ctx, writer);
+	}
+	fz_always(ctx)
+	{
+		fz_drop_story(ctx, story);
+		fz_drop_buffer(ctx, buf);
+		fz_drop_document_writer(ctx, writer);
+		fz_drop_archive(ctx, archive);
+	}
+	fz_catch(ctx)
+	{
+		fz_report_error(ctx);
+	}
+
+	/* Now one made with programmatic content. */
+	writer = NULL;
+	buf = NULL;
+	story = NULL;
+	dev = NULL;
+
+	fz_try(ctx)
+	{
+		fz_xml *dom, *body, *tmp;
+
+		writer = fz_new_pdf_writer(ctx, "out2.pdf", "");
+
+		story = fz_new_story(ctx, NULL, "", 11, NULL);
+
+		dom = fz_story_document(ctx, story);
+
+		body = fz_dom_body(ctx, dom);
+
+		fz_dom_append_child(ctx, body, fz_dom_create_text_node(ctx, dom, "This is some text."));
+		tmp = fz_dom_create_element(ctx, dom, "b");
+		fz_dom_append_child(ctx, body, tmp);
+		fz_dom_append_child(ctx, tmp, fz_dom_create_text_node(ctx, dom, "This is some bold text."));
+		fz_dom_append_child(ctx, body, fz_dom_create_text_node(ctx, dom, "This is some normal text."));
+
+		do
+		{
+			fz_rect where;
+			fz_rect filled;
+
+			where.x0 = mediabox.x0 + margin;
+			where.y0 = mediabox.y0 + margin;
+			where.x1 = mediabox.x1 - margin;
+			where.y1 = mediabox.y1 - margin;
+
+			dev = fz_begin_page(ctx, writer, mediabox);
+
+			more = fz_place_story(ctx, story, where, &filled);
+
+			fz_draw_story(ctx, story, dev, fz_identity);
+
+			fz_end_page(ctx, writer);
+		}
+		while (more);
+
+		fz_close_document_writer(ctx, writer);
+	}
+	fz_always(ctx)
+	{
+		fz_drop_story(ctx, story);
+		fz_drop_buffer(ctx, buf);
+		fz_drop_document_writer(ctx, writer);
+	}
+	fz_catch(ctx)
+	{
+		fz_report_error(ctx);
+	}
+
+	/* Now a combination of the two. */
+	writer = NULL;
+	buf = NULL;
+	story = NULL;
+	dev = NULL;
+
+	fz_try(ctx)
+	{
+		fz_xml *dom, *body, *tmp, *templat;
+		int i, j;
+
+		writer = fz_new_pdf_writer(ctx, "out3.pdf", "");
+
+		buf = fz_new_buffer_from_copied_data(ctx, (unsigned char *)festival_template, strlen(festival_template)+1);
+		story = fz_new_story(ctx, buf, "", 11, NULL);
+
+		dom = fz_story_document(ctx, story);
+
+		body = fz_dom_body(ctx, dom);
+
+		templat = fz_dom_find(ctx, body, NULL, "id", "filmtemplate");
+
+		for (i = 0; i < nelem(films); i++)
+		{
+			fz_xml *film = fz_dom_clone(ctx, templat);
+
+			/* Now fill in some of the template. */
+			tmp = fz_dom_find(ctx, film, NULL, "id", "filmtitle");
+			fz_dom_append_child(ctx, tmp, fz_dom_create_text_node(ctx, dom, films[i].title));
+
+			tmp = fz_dom_find(ctx, film, NULL, "id", "director");
+			fz_dom_append_child(ctx, tmp, fz_dom_create_text_node(ctx, dom, films[i].director));
+
+			tmp = fz_dom_find(ctx, film, NULL, "id", "filmyear");
+			fz_dom_append_child(ctx, tmp, fz_dom_create_text_node(ctx, dom, films[i].year));
+
+			tmp = fz_dom_find(ctx, film, NULL, "id", "cast");
+			for (j = 0; j < MAX_CAST_MEMBERS; j++)
+			{
+				if (films[i].cast[j] == NULL)
+					break;
+				fz_dom_append_child(ctx, tmp, fz_dom_create_text_node(ctx, dom, films[i].cast[j]));
+				fz_dom_append_child(ctx, tmp, fz_dom_create_element(ctx, dom, "br"));
+			}
+
+			fz_dom_append_child(ctx, fz_dom_parent(ctx, templat), film);
+		}
+
+		/* Remove the template. */
+		fz_dom_remove(ctx, templat);
+
+		do
+		{
+			fz_rect where;
+			fz_rect filled;
+
+			where.x0 = mediabox.x0 + margin;
+			where.y0 = mediabox.y0 + margin;
+			where.x1 = mediabox.x1 - margin;
+			where.y1 = mediabox.y1 - margin;
+
+			dev = fz_begin_page(ctx, writer, mediabox);
+
+			more = fz_place_story(ctx, story, where, &filled);
+
+			fz_draw_story(ctx, story, dev, fz_identity);
+
+			fz_end_page(ctx, writer);
+		}
+		while (more);
+
+		fz_close_document_writer(ctx, writer);
+	}
+	fz_always(ctx)
+	{
+		fz_drop_story(ctx, story);
+		fz_drop_buffer(ctx, buf);
+		fz_drop_document_writer(ctx, writer);
+	}
+	fz_catch(ctx)
+	{
+		fz_report_error(ctx);
+	}
+
+	test_write_stabilized_story(ctx);
+
+	fz_drop_context(ctx);
+
+	return 0;
+}