PangoFontMetrics *metrics;
};
+/* An output item whose rendering is in progress. */
+struct xr_render_fsm
+ {
+ /* Renders as much of itself as it can on the current page. Returns true
+ if rendering is complete, false if the output item needs another
+ page. */
+ bool (*render) (struct xr_render_fsm *, struct xr_driver *);
+
+ /* Destroys the output item. */
+ void (*destroy) (struct xr_render_fsm *);
+ };
+
/* Cairo output driver. */
struct xr_driver
{
cairo_t *cairo;
int page_number; /* Current page number. */
int y;
+ struct xr_render_fsm *fsm;
};
static const struct output_driver_class cairo_driver_class;
-static void xr_show_page (struct xr_driver *);
static void draw_headers (struct xr_driver *);
+static void xr_driver_destroy_fsm (struct xr_driver *);
+static void xr_driver_run_fsm (struct xr_driver *);
static bool load_font (struct xr_driver *, struct xr_font *);
static void free_font (struct xr_font *);
static void xr_draw_cell (void *, const struct table_cell *,
int bb[TABLE_N_AXES][2],
int clip[TABLE_N_AXES][2]);
+
+static struct xr_render_fsm *xr_render_output_item (
+ struct xr_driver *, const struct output_item *);
\f
-/* Driver initialization. */
+/* Output driver basics. */
static struct xr_driver *
xr_driver_cast (struct output_driver *driver)
goto error;
}
+ draw_headers (xr);
+
return &xr->driver;
error:
struct xr_driver *xr = xr_driver_cast (driver);
size_t i;
+ xr_driver_destroy_fsm (xr);
+
if (xr->cairo != NULL)
{
cairo_status_t status;
- if (xr->y > 0)
- xr_show_page (xr);
-
cairo_surface_finish (cairo_get_target (xr->cairo));
status = cairo_status (xr->cairo);
if (status != CAIRO_STATUS_SUCCESS)
}
static void
-xr_output_table_item (struct xr_driver *xr,
- const struct table_item *table_item)
+xr_submit (struct output_driver *driver, const struct output_item *output_item)
{
- struct render_break x_break;
- struct render_page *page;
- int caption_height;
-
- if (xr->y > 0)
- xr->y += xr->font_height;
+ struct xr_driver *xr = xr_driver_cast (driver);
- page = xr_render_table_item (xr, table_item, &caption_height);
- xr->params->size[V] = xr->length - caption_height;
- for (render_break_init (&x_break, page, H);
- render_break_has_next (&x_break); )
+ xr_driver_output_item (xr, output_item);
+ while (xr_driver_need_new_page (xr))
{
- struct render_page *x_slice;
- struct render_break y_break;
-
- x_slice = render_break_next (&x_break, xr->width);
- for (render_break_init (&y_break, x_slice, V);
- render_break_has_next (&y_break); )
- {
- int space = xr->length - xr->y;
- struct render_page *y_slice;
+ cairo_show_page (xr->cairo);
+ xr_driver_next_page (xr, xr->cairo);
+ }
+}
+\f
+/* Functions for rendering a series of output items to a series of Cairo
+ contexts, with pagination, possibly including headers.
- /* XXX doesn't allow for caption or space between segments */
- if (render_break_next_size (&y_break) > space)
- {
- assert (xr->y > 0);
- xr_show_page (xr);
- continue;
- }
+ Used by PSPPIRE for printing, and by the basic Cairo output driver above as
+ its underlying implementation.
- y_slice = render_break_next (&y_break, space);
- if (caption_height)
- {
- struct table_cell cell;
- int bb[TABLE_N_AXES][2];
+ See the big comment in cairo.h for intended usage. */
- xr_init_caption_cell (table_item_get_caption (table_item),
- &cell);
- bb[H][0] = 0;
- bb[H][1] = xr->width;
- bb[V][0] = 0;
- bb[V][1] = caption_height;
- xr_draw_cell (xr, &cell, bb, bb);
- xr->y += caption_height;
- caption_height = 0;
- }
+/* Gives new page CAIRO to XR for output. CAIRO may be null to skip actually
+ rendering the page (which might be useful to find out how many pages an
+ output document has without actually rendering it). */
+void
+xr_driver_next_page (struct xr_driver *xr, cairo_t *cairo)
+{
+ xr->page_number++;
+ xr->cairo = cairo;
+ xr->y = 0;
+ draw_headers (xr);
+ xr_driver_run_fsm (xr);
+}
- render_page_draw (y_slice);
- xr->y += render_page_get_size (y_slice, V);
- render_page_unref (y_slice);
- }
- render_break_destroy (&y_break);
- }
- render_break_destroy (&x_break);
+/* Start rendering OUTPUT_ITEM to XR. Only valid if XR is not in the middle of
+ rendering a previous output item, that is, only if xr_driver_need_new_page()
+ returns false. */
+void
+xr_driver_output_item (struct xr_driver *xr,
+ const struct output_item *output_item)
+{
+ assert (xr->fsm == NULL);
+ xr->fsm = xr_render_output_item (xr, output_item);
+ xr_driver_run_fsm (xr);
}
-static void
-xr_output_text (struct xr_driver *xr, const char *text)
+/* Returns true if XR is in the middle of rendering an output item and needs a
+ new page to be appended using xr_driver_next_page() to make progress,
+ otherwise false. */
+bool
+xr_driver_need_new_page (const struct xr_driver *xr)
{
- struct table_item *table_item;
+ return xr->fsm != NULL;
+}
- table_item = table_item_create (table_from_string (TAB_LEFT, text), NULL);
- xr_output_table_item (xr, table_item);
- table_item_unref (table_item);
+/* Returns true if the current page doesn't have any content yet (besides
+ headers, if enabled). */
+bool
+xr_driver_is_page_blank (const struct xr_driver *xr)
+{
+ return xr->y == 0;
}
static void
-xr_submit (struct output_driver *driver, const struct output_item *output_item)
+xr_driver_destroy_fsm (struct xr_driver *xr)
{
- struct xr_driver *xr = xr_driver_cast (driver);
- if (is_table_item (output_item))
- xr_output_table_item (xr, to_table_item (output_item));
- else if (is_chart_item (output_item))
- {
- if (xr->y > 0)
- xr_show_page (xr);
- xr_draw_chart (to_chart_item (output_item), xr->cairo, 0.0, 0.0,
- xr_to_pt (xr->width), xr_to_pt (xr->length));
- xr_show_page (xr);
- }
- else if (is_text_item (output_item))
- {
- const struct text_item *text_item = to_text_item (output_item);
- enum text_item_type type = text_item_get_type (text_item);
- const char *text = text_item_get_text (text_item);
-
- switch (type)
- {
- case TEXT_ITEM_TITLE:
- free (xr->title);
- xr->title = xstrdup (text);
- break;
-
- case TEXT_ITEM_SUBTITLE:
- free (xr->subtitle);
- xr->subtitle = xstrdup (text);
- break;
-
- case TEXT_ITEM_COMMAND_CLOSE:
- break;
-
- case TEXT_ITEM_BLANK_LINE:
- if (xr->y > 0)
- xr->y += xr->font_height;
- break;
-
- case TEXT_ITEM_EJECT_PAGE:
- if (xr->y > 0)
- xr_show_page (xr);
- break;
-
- default:
- xr_output_text (xr, text);
- break;
- }
- }
- else if (is_message_item (output_item))
+ if (xr->fsm != NULL)
{
- const struct message_item *message_item = to_message_item (output_item);
- const struct msg *msg = message_item_get_msg (message_item);
- char *s = msg_to_string (msg, xr->command_name);
- xr_output_text (xr, s);
- free (s);
+ xr->fsm->destroy (xr->fsm);
+ xr->fsm = NULL;
}
}
static void
-xr_show_page (struct xr_driver *xr)
+xr_driver_run_fsm (struct xr_driver *xr)
{
- if (xr->headers)
- {
- xr->y = 0;
- draw_headers (xr);
- }
- cairo_show_page (xr->cairo);
-
- xr->page_number++;
- xr->y = 0;
+ if (xr->fsm != NULL && !xr->fsm->render (xr->fsm, xr))
+ xr_driver_destroy_fsm (xr);
}
\f
static void
cell.contents = string;
cell.options = options;
bb[H][0] = x;
- bb[V][0] = y;
+ bb[V][0] = y - xr->y;
bb[H][1] = x + max_width;
- bb[V][1] = xr->font_height;
+ bb[V][1] = xr->font_height - xr->y;
xr_layout_cell (xr, &cell, bb, bb, PANGO_WRAP_WORD_CHAR, &w, &h);
return w;
}
int x0, x1;
int y;
+ if (!xr->headers || xr->cairo == NULL)
+ return;
+
y = -3 * xr->font_height;
x0 = xr->font_height / 2;
x1 = xr->width - xr->font_height / 2;
#define CHART_HEIGHT 375
struct xr_driver *
-xr_create_driver (cairo_t *cairo, struct string_map *options)
+xr_driver_create (cairo_t *cairo, struct string_map *options)
{
struct xr_driver *xr = xr_allocate ("cairo", 0, options);
xr->width = INT_MAX / 8;
return file_name;
}
+\f
+struct xr_table_state
+ {
+ struct xr_render_fsm fsm;
+ struct table_item *table_item;
+ struct render_break x_break;
+ struct render_break y_break;
+ int caption_height;
+ };
+
+static bool
+xr_table_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
+{
+ struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
+
+ for (;;)
+ {
+ struct render_page *y_slice;
+ int space;
+
+ while (!render_break_has_next (&ts->y_break))
+ {
+ struct render_page *x_slice;
+
+ render_break_destroy (&ts->y_break);
+ if (!render_break_has_next (&ts->x_break))
+ return false;
+
+ x_slice = render_break_next (&ts->x_break, xr->width);
+ render_break_init (&ts->y_break, x_slice, V);
+ }
+
+ space = xr->length - xr->y;
+ if (render_break_next_size (&ts->y_break) > space)
+ {
+ assert (xr->y > 0);
+ return true;
+ }
+
+ y_slice = render_break_next (&ts->y_break, space);
+ if (ts->caption_height)
+ {
+ if (xr->cairo)
+ {
+ struct table_cell cell;
+ int bb[TABLE_N_AXES][2];
+
+ xr_init_caption_cell (table_item_get_caption (ts->table_item),
+ &cell);
+ bb[H][0] = 0;
+ bb[H][1] = xr->width;
+ bb[V][0] = 0;
+ bb[V][1] = ts->caption_height;
+ xr_draw_cell (xr, &cell, bb, bb);
+ }
+ xr->y += ts->caption_height;
+ ts->caption_height = 0;
+ }
+
+ if (xr->cairo)
+ render_page_draw (y_slice);
+ xr->y += render_page_get_size (y_slice, V);
+ render_page_unref (y_slice);
+ }
+}
+
+static void
+xr_table_destroy (struct xr_render_fsm *fsm)
+{
+ struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
+
+ table_item_unref (ts->table_item);
+ render_break_destroy (&ts->x_break);
+ render_break_destroy (&ts->y_break);
+ free (ts);
+}
+
+static struct xr_render_fsm *
+xr_render_table (struct xr_driver *xr, const struct table_item *table_item)
+{
+ struct xr_table_state *ts;
+ struct render_page *page;
+
+ ts = xmalloc (sizeof *ts);
+ ts->fsm.render = xr_table_render;
+ ts->fsm.destroy = xr_table_destroy;
+ ts->table_item = table_item_ref (table_item);
+
+ if (xr->y > 0)
+ xr->y += xr->font_height;
+
+ page = xr_render_table_item (xr, table_item, &ts->caption_height);
+ xr->params->size[V] = xr->length - ts->caption_height;
+
+ render_break_init (&ts->x_break, page, H);
+ render_break_init_empty (&ts->y_break);
+
+ return &ts->fsm;
+}
+\f
+struct xr_chart_state
+ {
+ struct xr_render_fsm fsm;
+ struct chart_item *chart_item;
+ };
+
+static bool
+xr_chart_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
+{
+ struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
+
+ if (xr->y > 0)
+ return true;
+
+ if (xr->cairo != NULL)
+ xr_draw_chart (cs->chart_item, xr->cairo, 0.0, 0.0,
+ xr_to_pt (xr->width), xr_to_pt (xr->length));
+ xr->y = xr->length;
+
+ return false;
+}
+
+static void
+xr_chart_destroy (struct xr_render_fsm *fsm)
+{
+ struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
+
+ chart_item_unref (cs->chart_item);
+ free (cs);
+}
+
+static struct xr_render_fsm *
+xr_render_chart (const struct chart_item *chart_item)
+{
+ struct xr_chart_state *cs;
+
+ cs = xmalloc (sizeof *cs);
+ cs->fsm.render = xr_chart_render;
+ cs->fsm.destroy = xr_chart_destroy;
+ cs->chart_item = chart_item_ref (chart_item);
+
+ return &cs->fsm;
+}
+\f
+static bool
+xr_eject_render (struct xr_render_fsm *fsm UNUSED, struct xr_driver *xr)
+{
+ return xr->y > 0;
+}
+
+static void
+xr_eject_destroy (struct xr_render_fsm *fsm UNUSED)
+{
+ /* Nothing to do. */
+}
+
+static struct xr_render_fsm *
+xr_render_eject (void)
+{
+ static struct xr_render_fsm eject_renderer =
+ {
+ xr_eject_render,
+ xr_eject_destroy
+ };
+
+ return &eject_renderer;
+}
+\f
+static struct xr_render_fsm *
+xr_create_text_renderer (struct xr_driver *xr, const char *text)
+{
+ struct table_item *table_item;
+ struct xr_render_fsm *fsm;
+
+ table_item = table_item_create (table_from_string (TAB_LEFT, text), NULL);
+ fsm = xr_render_table (xr, table_item);
+ table_item_unref (table_item);
+
+ return fsm;
+}
+
+static struct xr_render_fsm *
+xr_render_text (struct xr_driver *xr, const struct text_item *text_item)
+{
+ enum text_item_type type = text_item_get_type (text_item);
+ const char *text = text_item_get_text (text_item);
+
+ switch (type)
+ {
+ case TEXT_ITEM_TITLE:
+ free (xr->title);
+ xr->title = xstrdup (text);
+ draw_headers (xr);
+ break;
+
+ case TEXT_ITEM_SUBTITLE:
+ free (xr->subtitle);
+ xr->subtitle = xstrdup (text);
+ draw_headers (xr);
+ break;
+
+ case TEXT_ITEM_COMMAND_CLOSE:
+ break;
+
+ case TEXT_ITEM_BLANK_LINE:
+ if (xr->y > 0)
+ xr->y += xr->font_height;
+ break;
+
+ case TEXT_ITEM_EJECT_PAGE:
+ if (xr->y > 0)
+ return xr_render_eject ();
+ break;
+
+ default:
+ return xr_create_text_renderer (xr, text);
+ }
+
+ return NULL;
+}
+
+static struct xr_render_fsm *
+xr_render_message (struct xr_driver *xr,
+ const struct message_item *message_item)
+{
+ const struct msg *msg = message_item_get_msg (message_item);
+ struct xr_render_fsm *fsm;
+ char *s;
+
+ s = msg_to_string (msg, xr->command_name);
+ fsm = xr_create_text_renderer (xr, s);
+ free (s);
+
+ return fsm;
+}
+
+static struct xr_render_fsm *
+xr_render_output_item (struct xr_driver *xr,
+ const struct output_item *output_item)
+{
+ if (is_table_item (output_item))
+ return xr_render_table (xr, to_table_item (output_item));
+ else if (is_chart_item (output_item))
+ return xr_render_chart (to_chart_item (output_item));
+ else if (is_text_item (output_item))
+ return xr_render_text (xr, to_text_item (output_item));
+ else if (is_message_item (output_item))
+ return xr_render_message (xr, to_message_item (output_item));
+ else
+ return NULL;
+}
projects / pspp-builds.git / commitdiff