Restore "Export PDF" and add initial printing stuff

1 files changed, 185 insertions, 0 deletions

diff --git a/src/print.c b/src/print.c
new file mode 100644
index 0000000..dfdbf83
--- /dev/null
+++ b/src/print.c
@@ -0,0 +1,185 @@
+/*
+ * print.c
+ *
+ * Copyright © 2016 Thomas White <taw@bitwiz.org.uk>
+ *
+ * This file is part of Colloquium.
+ *
+ * Colloquium is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <gtk/gtk.h>
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "presentation.h"
+#include "narrative_window.h"
+#include "render.h"
+
+
+static GtkPrintSettings *print_settings = NULL;
+
+struct print_stuff
+{
+	struct presentation *p;
+	GtkWidget *combo;
+	int slides_only;
+	SCBlock *slide;
+};
+
+
+static void print_widget_apply(GtkPrintOperation *op, GtkWidget *widget,
+                               void *vp)
+{
+	const char *id;
+	struct print_stuff *ps = vp;
+
+	id = gtk_combo_box_get_active_id(GTK_COMBO_BOX(ps->combo));
+	if ( strcmp(id, "slides") == 0 ) {
+		ps->slides_only = 1;
+	} else {
+		ps->slides_only = 0;
+	}
+}
+
+
+static GObject *print_widget(GtkPrintOperation *op, void *vp)
+{
+	GtkWidget *vbox;
+	GtkWidget *cbox;
+	struct print_stuff *ps = vp;
+
+	vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 10);
+	gtk_container_set_border_width(GTK_CONTAINER(vbox), 10);
+
+	/* What do you want to print? */
+	cbox = gtk_combo_box_text_new();
+	gtk_combo_box_text_append(GTK_COMBO_BOX_TEXT(cbox), "slides",
+	                          "Print the slides only");
+	gtk_combo_box_text_append(GTK_COMBO_BOX_TEXT(cbox), "narrative",
+	                          "Print the narrative");
+	gtk_box_pack_start(GTK_BOX(vbox), cbox, FALSE, FALSE, 10);
+	gtk_combo_box_set_active(GTK_COMBO_BOX(cbox), 1);
+	ps->combo = cbox;
+
+	gtk_widget_show_all(vbox);
+	return G_OBJECT(vbox);
+
+}
+
+
+static void print_slide_only(GtkPrintOperation *op, GtkPrintContext *ctx,
+                             struct print_stuff *ps, int page)
+{
+	cairo_t *cr;
+	PangoContext *pc;
+	double w, h;
+	SCBlock *stylesheets[2];
+	struct frame *top;
+
+	cr = gtk_print_context_get_cairo_context(ctx);
+	pc = gtk_print_context_create_pango_context(ctx);
+	w = gtk_print_context_get_width(ctx);
+	h = gtk_print_context_get_height(ctx);
+
+	stylesheets[0] = ps->p->stylesheet;
+	stylesheets[1] = NULL;
+
+	cairo_rectangle(cr, 0.0, 0.0, w, h);
+	cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
+	cairo_fill(cr);
+
+	top = interp_and_shape(sc_block_child(ps->slide), stylesheets, NULL,
+	                       ps->p->is, ISZ_SLIDESHOW,
+	                       page+1, cr,
+	                       ps->p->slide_width, ps->p->slide_height,
+	                       ps->p->lang);
+
+	recursive_wrap(top, pc);
+
+	recursive_draw(top, cr, ps->p->is, ISZ_SLIDESHOW,
+	               0.0, ps->p->slide_height);
+
+	ps->slide = next_slide(ps->p, ps->slide);
+}
+
+
+static void print_begin(GtkPrintOperation *op, GtkPrintContext *ctx, void *vp)
+{
+	struct print_stuff *ps = vp;
+
+	if ( ps->slides_only ) {
+		gtk_print_operation_set_n_pages(op, num_slides(ps->p));
+		ps->slide = first_slide(ps->p);
+	} else {
+		/* FIXME */
+		printf("Don't know how to print the narrative yet\n");
+	}
+}
+
+
+static void print_draw(GtkPrintOperation *op, GtkPrintContext *ctx, gint page,
+                       void *vp)
+{
+	struct print_stuff *ps = vp;
+	if ( ps->slides_only ) {
+		print_slide_only(op, ctx, ps, page);
+	}
+}
+
+
+void print_sig(GSimpleAction *action, GVariant *parameter, gpointer vp)
+{
+	struct presentation *p = vp;
+	GtkPrintOperation *print;
+	GtkPrintOperationResult res;
+	struct print_stuff *ps;
+
+	ps = malloc(sizeof(struct print_stuff));
+	if ( ps == NULL ) return;
+	ps->p = p;
+
+	print = gtk_print_operation_new();
+	if ( print_settings != NULL ) {
+		gtk_print_operation_set_print_settings(print, print_settings);
+	}
+
+	g_signal_connect(print, "create-custom-widget",
+			 G_CALLBACK(print_widget), ps);
+	g_signal_connect(print, "custom-widget-apply",
+			 G_CALLBACK(print_widget_apply), ps);
+	g_signal_connect(print, "begin_print", G_CALLBACK(print_begin), ps);
+	g_signal_connect(print, "draw_page", G_CALLBACK(print_draw), ps);
+
+	res = gtk_print_operation_run(print,
+	                              GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG,
+	                              GTK_WINDOW(NULL), NULL);
+
+	if ( res == GTK_PRINT_OPERATION_RESULT_APPLY ) {
+		if ( print_settings != NULL ) {
+			g_object_unref(print_settings);
+		}
+		print_settings = g_object_ref(
+				 gtk_print_operation_get_print_settings(print));
+	}
+	g_object_unref(print);
+}
+