/* PSPP - a program for statistical analysis.
- Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc.
+ Copyright (C) 2009, 2010, 2011, 2013, 2014 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include <math.h>
#include <stdio.h>
+#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "libpspp/hash-functions.h"
#include "libpspp/hmap.h"
#include "output/render.h"
+#include "output/tab.h"
+#include "output/table-item.h"
#include "output/table.h"
#include "gl/minmax.h"
May represent the layout of an entire table presented to
render_page_create(), or a rectangular subregion of a table broken out using
- render_page_next() to allow a table to be broken across multiple pages. */
+ render_break_next() to allow a table to be broken across multiple pages.
+
+ A page's size is not limited to the size passed in as part of render_params.
+ render_pager breaks a render_page into smaller render_pages that will fit in
+ the available space. */
struct render_page
{
const struct render_params *params; /* Parameters of the target device. */
Similarly, cp[V] represents y positions within the table.
cp[V][0] = 0.
cp[V][1] = the height of the topmost horizontal rule.
- cp[V][2] = cp[V][1] + the height of the topmost column.
+ cp[V][2] = cp[V][1] + the height of the topmost row.
cp[V][3] = cp[V][2] + the height of the second-from-top horizontal rule.
and so on:
cp[V][2 * nr] = y position of the bottommost horizontal rule.
entire page can overflow on all four sides!) */
struct hmap overflows;
+ /* Contains "struct render_footnote"s, one for each cell with one or more
+ footnotes.
+
+ 'n_footnotes' is the number of footnotes in the table. There might be
+ more than hmap_count(&page->footnotes) because there can be more than
+ one footnote in a cell. */
+ struct hmap footnotes;
+ size_t n_footnotes;
+
/* If a single column (or row) is too wide (or tall) to fit on a page
reasonably, then render_break_next() will split a single row or column
across multiple render_pages. This member indicates when this has
int *join_crossing[TABLE_N_AXES];
};
+static struct render_page *render_page_create (const struct render_params *,
+ const struct table *);
+
+struct render_page *render_page_ref (const struct render_page *page_);
+static void render_page_unref (struct render_page *);
+
/* Returns the offset in struct render_page's cp[axis] array of the rule with
index RULE_IDX. That is, if RULE_IDX is 0, then the offset is that of the
leftmost or topmost rule; if RULE_IDX is 1, then the offset is that of the
return axis_width (page, axis, cell_ofs (x), cell_ofs (x) + 1);
}
+/* Returns the width of rule X along AXIS in PAGE. */
+static int
+rule_width (const struct render_page *page, int axis, int x)
+{
+ return axis_width (page, axis, rule_ofs (x), rule_ofs (x) + 1);
+}
+
+/* Returns the width of rule X along AXIS in PAGE. */
+static int
+rule_width_r (const struct render_page *page, int axis, int x)
+{
+ int ofs = rule_ofs_r (page, axis, x);
+ return axis_width (page, axis, ofs, ofs + 1);
+}
+
/* Returns the width of cells X0 through X1, exclusive, along AXIS in PAGE. */
static int
joined_width (const struct render_page *page, int axis, int x0, int x1)
int overflow[TABLE_N_AXES][2];
};
-/* Returns a hash value for (X,Y). */
+/* Returns a hash value for (,Y). */
static unsigned int
-hash_overflow (int x, int y)
+hash_cell (int x, int y)
{
return hash_int (x + (y << 16), 0);
}
const struct render_overflow *of;
HMAP_FOR_EACH_WITH_HASH (of, struct render_overflow, node,
- hash_overflow (x, y), &page->overflows)
+ hash_cell (x, y), &page->overflows)
if (x == of->d[H] && y == of->d[V])
return of;
}
return NULL;
}
\f
+/* A footnote. */
+struct render_footnote
+ {
+ struct hmap_node node;
+
+ /* The area of the table covered by the cell that has the footnote.
+
+ d[H][0] is the leftmost column.
+ d[H][1] is the rightmost column, plus 1.
+ d[V][0] is the top row.
+ d[V][1] is the bottom row, plus 1.
+
+ The cell in its original table might occupy a larger region. This
+ member reflects the size of the cell in the current render_page, after
+ trimming off any rows or columns due to page-breaking. */
+ int d[TABLE_N_AXES][2];
+
+ /* The index of the first footnote in the cell. */
+ int idx;
+ };
+
+static int
+count_footnotes (const struct table_cell *cell)
+{
+ size_t i;
+ int n;
+
+ n = 0;
+ for (i = 0; i < cell->n_contents; i++)
+ n += cell->contents[i].n_footnotes;
+ return n;
+}
+
+static int
+find_footnote_idx (const struct table_cell *cell, const struct hmap *footnotes)
+{
+ const struct render_footnote *f;
+
+ if (!count_footnotes (cell))
+ return 0;
+
+ HMAP_FOR_EACH_WITH_HASH (f, struct render_footnote, node,
+ hash_cell (cell->d[H][0], cell->d[V][0]), footnotes)
+ if (f->d[H][0] == cell->d[H][0] && f->d[V][0] == cell->d[V][0])
+ return f->idx;
+
+ NOT_REACHED ();
+}
+\f
/* Row or column dimensions. Used to figure the size of a table in
render_page_create() and discarded after that. */
struct render_row
w += width * unspanned * d0;
}
- rows[x].width = w / d;
+ rows[x].width = MAX (rows[x].width, w / d);
w -= rows[x].width * d;
}
}
}
hmap_init (&page->overflows);
+ hmap_init (&page->footnotes);
+ page->n_footnotes = 0;
memset (page->is_edge_cutoff, 0, sizeof page->is_edge_cutoff);
return page;
The new render_page will be suitable for rendering on a device whose page
size is PARAMS->size, but the caller is responsible for actually breaking it
up to fit on such a device, using the render_break abstraction. */
-struct render_page *
+static struct render_page *
render_page_create (const struct render_params *params,
const struct table *table_)
{
struct render_row *rows;
int table_widths[2];
int *rules[TABLE_N_AXES];
+ struct hmap footnotes;
+ int footnote_idx;
int nr, nc;
int x, y;
int i;
}
/* Calculate minimum and maximum widths of cells that do not
- span multiple columns. */
+ span multiple columns. Assign footnote markers. */
+ hmap_init (&footnotes);
+ footnote_idx = 0;
for (i = 0; i < 2; i++)
columns[i] = xzalloc (nc * sizeof *columns[i]);
for (y = 0; y < nr; y++)
struct table_cell cell;
table_get_cell (table, x, y, &cell);
- if (y == cell.d[V][0] && table_cell_colspan (&cell) == 1)
+ if (y == cell.d[V][0])
{
- int w[2];
- int i;
-
- params->measure_cell_width (params->aux, &cell, &w[MIN], &w[MAX]);
- for (i = 0; i < 2; i++)
- if (columns[i][x].unspanned < w[i])
- columns[i][x].unspanned = w[i];
+ int n;
+
+ if (table_cell_colspan (&cell) == 1)
+ {
+ int w[2];
+ int i;
+
+ params->measure_cell_width (params->aux, &cell, footnote_idx,
+ &w[MIN], &w[MAX]);
+ for (i = 0; i < 2; i++)
+ if (columns[i][x].unspanned < w[i])
+ columns[i][x].unspanned = w[i];
+ }
+
+ n = count_footnotes (&cell);
+ if (n > 0)
+ {
+ struct render_footnote *f = xmalloc (sizeof *f);
+ f->d[H][0] = cell.d[H][0];
+ f->d[H][1] = cell.d[H][1];
+ f->d[V][0] = cell.d[V][0];
+ f->d[V][1] = cell.d[V][1];
+ f->idx = footnote_idx;
+ hmap_insert (&footnotes, &f->node, hash_cell (x, y));
+
+ footnote_idx += n;
+ }
}
x = cell.d[H][1];
table_cell_free (&cell);
{
int w[2];
- params->measure_cell_width (params->aux, &cell, &w[MIN], &w[MAX]);
+ params->measure_cell_width (params->aux, &cell,
+ find_footnote_idx (&cell, &footnotes),
+ &w[MIN], &w[MAX]);
for (i = 0; i < 2; i++)
distribute_spanned_width (w[i], &columns[i][cell.d[H][0]],
rules[H], table_cell_colspan (&cell));
if (table_cell_rowspan (&cell) == 1)
{
int w = joined_width (page, H, cell.d[H][0], cell.d[H][1]);
- int h = params->measure_cell_height (params->aux, &cell, w);
+ int h = params->measure_cell_height (
+ params->aux, &cell, find_footnote_idx (&cell, &footnotes), w);
if (h > r->unspanned)
r->unspanned = r->width = h;
}
if (y == cell.d[V][0] && table_cell_rowspan (&cell) > 1)
{
int w = joined_width (page, H, cell.d[H][0], cell.d[H][1]);
- int h = params->measure_cell_height (params->aux, &cell, w);
+ int h = params->measure_cell_height (
+ params->aux, &cell, find_footnote_idx (&cell, &footnotes), w);
distribute_spanned_width (h, &rows[cell.d[V][0]], rules[V],
table_cell_rowspan (&cell));
}
}
}
+ hmap_swap (&page->footnotes, &footnotes);
+ hmap_destroy (&footnotes);
+ page->n_footnotes = footnote_idx;
+
free (rules[H]);
free (rules[V]);
/* Decreases PAGE's reference count and destroys PAGE if this causes the
reference count to fall to zero. */
-void
+static void
render_page_unref (struct render_page *page)
{
if (page != NULL && --page->ref_cnt == 0)
{
return page->cp[axis][page->n[axis] * 2 + 1];
}
+
+/* If PAGE is smaller than SIZE along AXIS, inserts extra space to increase
+ its size to SIZE. */
+void
+render_page_stretch (struct render_page *page, enum table_axis axis,
+ int size)
+{
+ int extra = size - render_page_get_size (page, axis);
+ if (extra > 0)
+ {
+ int n = page->n[axis];
+ int error = 0;
+ int adjust = 0;
+ int i;
+
+ for (i = 2; i <= 2 * n + 1; i++)
+ {
+ if (!(i & 1))
+ {
+ error += extra;
+ adjust += error / n;
+ error %= n;
+ }
+ page->cp[axis][i] += adjust;
+ }
+ }
+}
+
+int
+render_page_get_best_breakpoint (const struct render_page *page, int height)
+{
+ int y;
+
+ /* If there's no room for at least the top row and the rules above and below
+ it, don't include any of the table. */
+ if (page->cp[V][3] > height)
+ return 0;
+
+ /* Otherwise include as many rows and rules as we can. */
+ for (y = 5; y <= 2 * page->n[V] + 1; y += 2)
+ if (page->cp[V][y] > height)
+ return page->cp[V][y - 2];
+ return height;
+}
\f
/* Drawing render_pages. */
}
static void
-render_rule (const struct render_page *page, const int d[TABLE_N_AXES])
+render_rule (const struct render_page *page, const int ofs[TABLE_N_AXES],
+ const int d[TABLE_N_AXES])
{
enum render_line_style styles[TABLE_N_AXES][2];
enum table_axis a;
{
int bb[TABLE_N_AXES][2];
- bb[H][0] = page->cp[H][d[H]];
- bb[H][1] = page->cp[H][d[H] + 1];
- bb[V][0] = page->cp[V][d[V]];
- bb[V][1] = page->cp[V][d[V] + 1];
+ bb[H][0] = ofs[H] + page->cp[H][d[H]];
+ bb[H][1] = ofs[H] + page->cp[H][d[H] + 1];
+ bb[V][0] = ofs[V] + page->cp[V][d[V]];
+ bb[V][1] = ofs[V] + page->cp[V][d[V] + 1];
page->params->draw_line (page->params->aux, bb, styles);
}
}
static void
-render_cell (const struct render_page *page, const struct table_cell *cell)
+render_cell (const struct render_page *page, const int ofs[TABLE_N_AXES],
+ const struct table_cell *cell)
{
const struct render_overflow *of;
int bb[TABLE_N_AXES][2];
int clip[TABLE_N_AXES][2];
- bb[H][0] = clip[H][0] = page->cp[H][cell->d[H][0] * 2 + 1];
- bb[H][1] = clip[H][1] = page->cp[H][cell->d[H][1] * 2];
- bb[V][0] = clip[V][0] = page->cp[V][cell->d[V][0] * 2 + 1];
- bb[V][1] = clip[V][1] = page->cp[V][cell->d[V][1] * 2];
+ bb[H][0] = clip[H][0] = ofs[H] + page->cp[H][cell->d[H][0] * 2 + 1];
+ bb[H][1] = clip[H][1] = ofs[H] + page->cp[H][cell->d[H][1] * 2];
+ bb[V][0] = clip[V][0] = ofs[V] + page->cp[V][cell->d[V][0] * 2 + 1];
+ bb[V][1] = clip[V][1] = ofs[V] + page->cp[V][cell->d[V][1] * 2];
of = find_overflow (page, cell->d[H][0], cell->d[V][0]);
if (of)
if (of->overflow[axis][0])
{
bb[axis][0] -= of->overflow[axis][0];
- if (cell->d[axis][0] == 0)
- clip[axis][0] = page->cp[axis][cell->d[axis][0] * 2];
+ if (cell->d[axis][0] == 0 && !page->is_edge_cutoff[axis][0])
+ clip[axis][0] = ofs[axis] + page->cp[axis][cell->d[axis][0] * 2];
}
if (of->overflow[axis][1])
{
bb[axis][1] += of->overflow[axis][1];
- if (cell->d[axis][1] == page->n[axis])
- clip[axis][1] = page->cp[axis][cell->d[axis][1] * 2 + 1];
+ if (cell->d[axis][1] == page->n[axis] && !page->is_edge_cutoff[axis][1])
+ clip[axis][1] = ofs[axis] + page->cp[axis][cell->d[axis][1] * 2 + 1];
}
}
}
- page->params->draw_cell (page->params->aux, cell, bb, clip);
+ page->params->draw_cell (page->params->aux, cell,
+ find_footnote_idx (cell, &page->footnotes), bb, clip);
}
/* Draws the cells of PAGE indicated in BB. */
static void
render_page_draw_cells (const struct render_page *page,
- int bb[TABLE_N_AXES][2])
+ int ofs[TABLE_N_AXES], int bb[TABLE_N_AXES][2])
{
int x, y;
int d[TABLE_N_AXES];
d[H] = x;
d[V] = y;
- render_rule (page, d);
+ render_rule (page, ofs, d);
x++;
}
else
struct table_cell cell;
table_get_cell (page->table, x / 2, y / 2, &cell);
- if (y == bb[V][0] || y / 2 == cell.d[V][0])
- render_cell (page, &cell);
+ if (y / 2 == bb[V][0] / 2 || y / 2 == cell.d[V][0])
+ render_cell (page, ofs, &cell);
x = rule_ofs (cell.d[H][1]);
table_cell_free (&cell);
}
/* Renders PAGE, by calling the 'draw_line' and 'draw_cell' functions from the
render_params provided to render_page_create(). */
void
-render_page_draw (const struct render_page *page)
+render_page_draw (const struct render_page *page, int ofs[TABLE_N_AXES])
{
int bb[TABLE_N_AXES][2];
bb[V][0] = 0;
bb[V][1] = page->n[V] * 2 + 1;
- render_page_draw_cells (page, bb);
+ render_page_draw_cells (page, ofs, bb);
}
/* Returns the greatest value i, 0 <= i < n, such that cp[i] <= x0. */
return best;
}
-/* Returns the least value i, 0 <= i < n, such that cp[i + 1] >= x1. */
+/* Returns the least value i, 0 <= i < n, such that cp[i] >= x1. */
static int
get_clip_max_extent (int x1, const int cp[], int n)
{
low = middle + 1;
}
+ while (best > 0 && cp[best - 1] == cp[best])
+ best--;
+
return best;
}
render_page_create(). */
void
render_page_draw_region (const struct render_page *page,
- int x, int y, int w, int h)
+ int ofs[TABLE_N_AXES], int clip[TABLE_N_AXES][2])
{
int bb[TABLE_N_AXES][2];
- bb[H][0] = get_clip_min_extent (x, page->cp[H], page->n[H] * 2 + 1);
- bb[H][1] = get_clip_max_extent (x + w, page->cp[H], page->n[H] * 2 + 1);
- bb[V][0] = get_clip_min_extent (y, page->cp[V], page->n[V] * 2 + 1);
- bb[V][1] = get_clip_max_extent (y + h, page->cp[V], page->n[V] * 2 + 1);
+ bb[H][0] = get_clip_min_extent (clip[H][0], page->cp[H], page->n[H] * 2 + 1);
+ bb[H][1] = get_clip_max_extent (clip[H][1], page->cp[H], page->n[H] * 2 + 1);
+ bb[V][0] = get_clip_min_extent (clip[V][0], page->cp[V], page->n[V] * 2 + 1);
+ bb[V][1] = get_clip_max_extent (clip[V][1], page->cp[V], page->n[V] * 2 + 1);
- render_page_draw_cells (page, bb);
+ render_page_draw_cells (page, ofs, bb);
}
\f
/* Breaking up tables to fit on a page. */
+/* An iterator for breaking render_pages into smaller chunks. */
+struct render_break
+ {
+ struct render_page *page; /* Page being broken up. */
+ enum table_axis axis; /* Axis along which 'page' is being broken. */
+ int z; /* Next cell along 'axis'. */
+ int pixel; /* Pixel offset within cell 'z' (usually 0). */
+ int hw; /* Width of headers of 'page' along 'axis'. */
+ };
+
static int needed_size (const struct render_break *, int cell);
static bool cell_is_breakable (const struct render_break *, int cell);
static struct render_page *render_page_select (const struct render_page *,
int z0, int p0,
int z1, int p1);
-/* Initializes render_break B for breaking PAGE along AXIS.
-
- Ownership of PAGE is transferred to B. The caller must use
- render_page_ref() if it needs to keep a copy of PAGE. */
-void
-render_break_init (struct render_break *b, struct render_page *page,
+/* Initializes render_break B for breaking PAGE along AXIS. */
+static void
+render_break_init (struct render_break *b, const struct render_page *page,
enum table_axis axis)
{
- b->page = page;
+ b->page = render_page_ref (page);
b->axis = axis;
- b->cell = page->h[axis][0];
+ b->z = page->h[axis][0];
b->pixel = 0;
b->hw = headers_width (page, axis);
}
/* Initializes B as a render_break structure for which
render_break_has_next() always returns false. */
-void
+static void
render_break_init_empty (struct render_break *b)
{
b->page = NULL;
b->axis = TABLE_HORZ;
- b->cell = 0;
+ b->z = 0;
b->pixel = 0;
b->hw = 0;
}
/* Frees B and unrefs the render_page that it owns. */
-void
+static void
render_break_destroy (struct render_break *b)
{
if (b != NULL)
/* Returns true if B still has cells that are yet to be returned,
false if all of B's page has been processed. */
-bool
+static bool
render_break_has_next (const struct render_break *b)
{
const struct render_page *page = b->page;
enum table_axis axis = b->axis;
- return page != NULL && b->cell < page->n[axis] - page->h[axis][1];
-}
-
-/* Returns the minimum SIZE argument that, if passed to render_break_next(),
- will avoid a null return value (if cells are still left). */
-int
-render_break_next_size (const struct render_break *b)
-{
- const struct render_page *page = b->page;
- enum table_axis axis = b->axis;
-
- return (!render_break_has_next (b) ? 0
- : !cell_is_breakable (b, b->cell) ? needed_size (b, b->cell + 1)
- : b->hw + page->params->font_size[axis]);
+ return page != NULL && b->z < page->n[axis] - page->h[axis][1];
}
/* Returns a new render_page that is up to SIZE pixels wide along B's axis.
SIZE is too small to reasonably render any cells. The latter will never
happen if SIZE is at least as large as the page size passed to
render_page_create() along B's axis. */
-struct render_page *
+static struct render_page *
render_break_next (struct render_break *b, int size)
{
const struct render_page *page = b->page;
enum table_axis axis = b->axis;
struct render_page *subpage;
- int cell, pixel;
+ int z, pixel;
if (!render_break_has_next (b))
return NULL;
pixel = 0;
- for (cell = b->cell; cell < page->n[axis] - page->h[axis][1]; cell++)
- if (needed_size (b, cell + 1) > size)
- {
- if (!cell_is_breakable (b, cell))
- {
- if (cell == b->cell)
- return NULL;
- }
- else
- pixel = (cell == b->cell
- ? b->pixel + size - b->hw
- : size - needed_size (b, cell));
- break;
- }
+ for (z = b->z; z < page->n[axis] - page->h[axis][1]; z++)
+ {
+ int needed = needed_size (b, z + 1);
+ if (needed > size)
+ {
+ if (cell_is_breakable (b, z))
+ {
+ /* If there is no right header and we render a partial cell on
+ the right side of the body, then we omit the rightmost rule of
+ the body. Otherwise the rendering is deceptive because it
+ looks like the whole cell is present instead of a partial
+ cell.
+
+ This is similar to code for the left side in needed_size(). */
+ int rule_allowance = (page->h[axis][1]
+ ? 0
+ : rule_width (page, axis, z));
+
+ /* The amount that, if we added cell 'z', the rendering would
+ overfill the allocated 'size'. */
+ int overhang = needed - size - rule_allowance;
+
+ /* The width of cell 'z'. */
+ int cell_size = cell_width (page, axis, z);
+
+ /* The amount trimmed off the left side of 'z',
+ and the amount left to render. */
+ int cell_ofs = z == b->z ? b->pixel : 0;
+ int cell_left = cell_size - cell_ofs;
+
+ /* A small but visible width. */
+ int em = page->params->font_size[axis];
+
+ /* If some of the cell remains to render,
+ and there would still be some of the cell left afterward,
+ then partially render that much of the cell. */
+ pixel = (cell_left && cell_left > overhang
+ ? cell_left - overhang + cell_ofs
+ : 0);
+
+ /* If there would be only a tiny amount of the cell left after
+ rendering it partially, reduce the amount rendered slightly
+ to make the output look a little better. */
+ if (pixel + em > cell_size)
+ pixel = MAX (pixel - em, 0);
+
+ /* If we're breaking vertically, then consider whether the cells
+ being broken have a better internal breakpoint than the exact
+ number of pixels available, which might look bad e.g. because
+ it breaks in the middle of a line of text. */
+ if (axis == TABLE_VERT && page->params->adjust_break)
+ {
+ int x;
+
+ for (x = 0; x < page->n[H]; )
+ {
+ struct table_cell cell;
+ int better_pixel;
+ int w;
+
+ table_get_cell (page->table, x, z, &cell);
+ w = joined_width (page, H, cell.d[H][0], cell.d[H][1]);
+ better_pixel = page->params->adjust_break (
+ page->params->aux, &cell,
+ find_footnote_idx (&cell, &page->footnotes), w, pixel);
+ x = cell.d[H][1];
+ table_cell_free (&cell);
+
+ if (better_pixel < pixel)
+ {
+ if (better_pixel > (z == b->z ? b->pixel : 0))
+ {
+ pixel = better_pixel;
+ break;
+ }
+ else if (better_pixel == 0 && z != b->z)
+ {
+ pixel = 0;
+ break;
+ }
+ }
+ }
+ }
+ }
+ break;
+ }
+ }
+
+ if (z == b->z && !pixel)
+ return NULL;
- subpage = render_page_select (page, axis, b->cell, b->pixel,
- pixel ? cell + 1 : cell,
- pixel ? cell_width (page, axis, cell) - pixel
+ subpage = render_page_select (page, axis, b->z, b->pixel,
+ pixel ? z + 1 : z,
+ pixel ? cell_width (page, axis, z) - pixel
: 0);
- b->cell = cell;
+ b->z = z;
b->pixel = pixel;
return subpage;
}
enum table_axis axis = b->axis;
int size;
- size = joined_width (page, axis, b->cell, cell) + b->hw - b->pixel;
+ /* Width of left header not including its rightmost rule. */
+ size = axis_width (page, axis, 0, rule_ofs (page->h[axis][0]));
+
+ /* If we have a pixel offset and there is no left header, then we omit the
+ leftmost rule of the body. Otherwise the rendering is deceptive because
+ it looks like the whole cell is present instead of a partial cell.
+
+ Otherwise (if there are headers) we will be merging two rules: the
+ rightmost rule in the header and the leftmost rule in the body. We assume
+ that the width of a merged rule is the larger of the widths of either rule
+ invidiually. */
+ if (b->pixel == 0 || page->h[axis][0])
+ size += MAX (rule_width (page, axis, page->h[axis][0]),
+ rule_width (page, axis, b->z));
+
+ /* Width of body, minus any pixel offset in the leftmost cell. */
+ size += joined_width (page, axis, b->z, cell) - b->pixel;
+
+ /* Width of rightmost rule in body merged with leftmost rule in headers. */
+ size += MAX (rule_width_r (page, axis, page->h[axis][1]),
+ rule_width (page, axis, cell));
+
+ /* Width of right header not including its leftmost rule. */
+ size += axis_width (page, axis, rule_ofs_r (page, axis, page->h[axis][1]),
+ rule_ofs_r (page, axis, 0));
+
+ /* Join crossing. */
if (page->h[axis][0] && page->h[axis][1])
- size += page->join_crossing[axis][b->cell];
+ size += page->join_crossing[axis][b->z];
return size;
}
const struct render_page *page = b->page;
enum table_axis axis = b->axis;
- return cell_width (page, axis, cell) > page->params->size[axis] / 2;
+ return cell_width (page, axis, cell) >= page->params->min_break[axis];
+}
+\f
+/* render_pager. */
+
+struct render_pager
+ {
+ const struct render_params *params;
+
+ struct render_page **pages;
+ size_t n_pages, allocated_pages;
+
+ size_t cur_page;
+ struct render_break x_break;
+ struct render_break y_break;
+ };
+
+static struct render_page *
+render_pager_add_table (struct render_pager *p, struct table *table)
+{
+ struct render_page *page;
+
+ if (p->n_pages >= p->allocated_pages)
+ p->pages = x2nrealloc (p->pages, &p->allocated_pages, sizeof *p->pages);
+ page = p->pages[p->n_pages++] = render_page_create (p->params, table);
+ return page;
+}
+
+static void
+render_pager_start_page (struct render_pager *p)
+{
+ render_break_init (&p->x_break, p->pages[p->cur_page++], H);
+ render_break_init_empty (&p->y_break);
+}
+
+static void
+add_footnote_page (struct render_pager *p, const struct render_page *body)
+{
+ const struct table *table = body->table;
+ int nc = table_nc (table);
+ int nr = table_nr (table);
+ int footnote_idx = 0;
+ struct tab_table *t;
+ int x, y;
+
+ if (!body->n_footnotes)
+ return;
+
+ t = tab_create (2, body->n_footnotes);
+ for (y = 0; y < nr; y++)
+ for (x = 0; x < nc; )
+ {
+ struct table_cell cell;
+
+ table_get_cell (table, x, y, &cell);
+ if (y == cell.d[V][0])
+ {
+ size_t i;
+
+ for (i = 0; i < cell.n_contents; i++)
+ {
+ const struct cell_contents *cc = &cell.contents[i];
+ size_t j;
+
+ for (j = 0; j < cc->n_footnotes; j++)
+ {
+ const char *f = cc->footnotes[j];
+
+ tab_text (t, 0, footnote_idx, TAB_LEFT, "");
+ tab_footnote (t, 0, footnote_idx, "(none)");
+ tab_text (t, 1, footnote_idx, TAB_LEFT, f);
+ footnote_idx++;
+ }
+ }
+ }
+ x = cell.d[H][1];
+ table_cell_free (&cell);
+ }
+ render_pager_add_table (p, &t->table);
+}
+
+/* Creates and returns a new render_pager for rendering TABLE_ITEM on the
+ device with the given PARAMS. */
+struct render_pager *
+render_pager_create (const struct render_params *params,
+ const struct table_item *table_item)
+{
+ const char *caption = table_item_get_caption (table_item);
+ const char *title = table_item_get_title (table_item);
+ const struct render_page *body_page;
+ struct render_page *title_page;
+ struct render_pager *p;
+
+ p = xzalloc (sizeof *p);
+ p->params = params;
+
+ /* Title. */
+ title_page = (title
+ ? render_pager_add_table (
+ p, table_from_string (TAB_CENTER | TAB_EMPH, title))
+ : NULL);
+
+ /* Body. */
+ body_page = render_pager_add_table (p, table_ref (table_item_get_table (
+ table_item)));
+ if (title_page && body_page)
+ {
+ int body_page_size = render_page_get_size (body_page, H);
+ render_page_stretch (title_page, H,
+ MIN (body_page_size, params->size[H]));
+ }
+
+ /* Caption. */
+ if (caption)
+ render_pager_add_table (p, table_from_string (TAB_LEFT, caption));
+
+ /* Footnotes. */
+ add_footnote_page (p, body_page);
+
+ render_pager_start_page (p);
+
+ return p;
+}
+
+/* Destroys P. */
+void
+render_pager_destroy (struct render_pager *p)
+{
+ if (p)
+ {
+ size_t i;
+
+ render_break_destroy (&p->x_break);
+ render_break_destroy (&p->y_break);
+ for (i = 0; i < p->n_pages; i++)
+ render_page_unref (p->pages[i]);
+ free (p->pages);
+ free (p);
+ }
+}
+
+/* Returns true if P has content remaining to render, false if rendering is
+ done. */
+bool
+render_pager_has_next (const struct render_pager *p_)
+{
+ struct render_pager *p = CONST_CAST (struct render_pager *, p_);
+
+ while (!render_break_has_next (&p->y_break))
+ {
+ render_break_destroy (&p->y_break);
+ if (!render_break_has_next (&p->x_break))
+ {
+ render_break_destroy (&p->x_break);
+ if (p->cur_page >= p->n_pages)
+ {
+ render_break_init_empty (&p->x_break);
+ render_break_init_empty (&p->y_break);
+ return false;
+ }
+ render_pager_start_page (p);
+ }
+ else
+ render_break_init (&p->y_break,
+ render_break_next (&p->x_break, p->params->size[H]), V);
+ }
+ return true;
+}
+
+/* Draws a chunk of content from P to fit in a space that has vertical size
+ SPACE and the horizontal size specified in the render_params passed to
+ render_page_create(). Returns the amount of space actually used by the
+ rendered chunk, which will be 0 if SPACE is too small to render anything or
+ if no content remains (use render_pager_has_next() to distinguish these
+ cases). */
+int
+render_pager_draw_next (struct render_pager *p, int space)
+{
+ int ofs[TABLE_N_AXES] = { 0, 0 };
+ size_t start_page = SIZE_MAX;
+
+ while (render_pager_has_next (p))
+ {
+ struct render_page *page;
+
+ if (start_page == p->cur_page)
+ break;
+ start_page = p->cur_page;
+
+ page = render_break_next (&p->y_break, space - ofs[V]);
+ if (!page)
+ break;
+
+ render_page_draw (page, ofs);
+ ofs[V] += render_page_get_size (page, V);
+ render_page_unref (page);
+ }
+ return ofs[V];
+}
+
+/* Draws all of P's content. */
+void
+render_pager_draw (const struct render_pager *p)
+{
+ render_pager_draw_region (p, 0, 0, INT_MAX, INT_MAX);
+}
+
+/* Draws the region of P's content that lies in the region (X,Y)-(X+W,Y+H).
+ Some extra content might be drawn; the device should perform clipping as
+ necessary. */
+void
+render_pager_draw_region (const struct render_pager *p,
+ int x, int y, int w, int h)
+{
+ int ofs[TABLE_N_AXES] = { 0, 0 };
+ int clip[TABLE_N_AXES][2];
+ size_t i;
+
+ clip[H][0] = x;
+ clip[H][1] = x + w;
+ for (i = 0; i < p->n_pages; i++)
+ {
+ const struct render_page *page = p->pages[i];
+ int size = render_page_get_size (page, V);
+
+ clip[V][0] = MAX (y, ofs[V]) - ofs[V];
+ clip[V][1] = MIN (y + h, ofs[V] + size) - ofs[V];
+ if (clip[V][1] > clip[V][0])
+ render_page_draw_region (page, ofs, clip);
+
+ ofs[V] += size;
+ }
+}
+
+/* Returns the size of P's content along AXIS; i.e. the content's width if AXIS
+ is TABLE_HORZ and its length if AXIS is TABLE_VERT. */
+int
+render_pager_get_size (const struct render_pager *p, enum table_axis axis)
+{
+ int size = 0;
+ size_t i;
+
+ for (i = 0; i < p->n_pages; i++)
+ {
+ int subsize = render_page_get_size (p->pages[i], axis);
+ size = axis == H ? MAX (size, subsize) : size + subsize;
+ }
+
+ return size;
+}
+
+int
+render_pager_get_best_breakpoint (const struct render_pager *p, int height)
+{
+ int y = 0;
+ size_t i;
+
+ for (i = 0; i < p->n_pages; i++)
+ {
+ int size = render_page_get_size (p->pages[i], V);
+ if (y + size >= height)
+ return render_page_get_best_breakpoint (p->pages[i], height - y) + y;
+ y += size;
+ }
+
+ return height;
}
\f
/* render_page_select() and helpers. */
const struct table_cell *);
/* Creates and returns a new render_page whose contents are a subregion of
- PAGE's contents. The new render_page includes cells Z0 through Z1 along
- AXIS, plus any headers on AXIS.
+ PAGE's contents. The new render_page includes cells Z0 through Z1
+ (exclusive) along AXIS, plus any headers on AXIS.
If P0 is nonzero, then it is a number of pixels to exclude from the left or
top (according to AXIS) of cell Z0. Similarly, P1 is a number of pixels to
render_page_select (const struct render_page *page, enum table_axis axis,
int z0, int p0, int z1, int p1)
{
+ const struct render_footnote *f;
struct render_page_selection s;
enum table_axis a = axis;
enum table_axis b = !a;
dcp = subpage->cp[a];
*dcp = 0;
for (z = 0; z <= rule_ofs (subpage->h[a][0]); z++, dcp++)
- dcp[1] = dcp[0] + (scp[z + 1] - scp[z]);
+ {
+ if (z == 0 && subpage->is_edge_cutoff[a][0])
+ dcp[1] = dcp[0];
+ else
+ dcp[1] = dcp[0] + (scp[z + 1] - scp[z]);
+ }
for (z = cell_ofs (z0); z <= cell_ofs (z1 - 1); z++, dcp++)
{
dcp[1] = dcp[0] + (scp[z + 1] - scp[z]);
}
for (z = rule_ofs_r (page, a, subpage->h[a][1]);
z <= rule_ofs_r (page, a, 0); z++, dcp++)
- dcp[1] = dcp[0] + (scp[z + 1] - scp[z]);
+ {
+ if (z == rule_ofs_r (page, a, 0) && subpage->is_edge_cutoff[a][1])
+ dcp[1] = dcp[0];
+ else
+ dcp[1] = dcp[0] + (scp[z + 1] - scp[z]);
+ }
assert (dcp == &subpage->cp[a][2 * subpage->n[a] + 1]);
for (z = 0; z < page->n[b] * 2 + 2; z++)
s.p1 = p1;
s.subpage = subpage;
- for (z = 0; z < page->n[b]; z++)
- {
- struct table_cell cell;
- int d[TABLE_N_AXES];
+ if (!page->h[a][0] || z0 > page->h[a][0] || p0)
+ for (z = 0; z < page->n[b]; )
+ {
+ struct table_cell cell;
+ int d[TABLE_N_AXES];
+ bool overflow0;
+ bool overflow1;
- d[a] = z0;
- d[b] = z;
- table_get_cell (page->table, d[H], d[V], &cell);
- if ((z == cell.d[b][0] && (p0 || cell.d[a][0] < z0))
- || (z == cell.d[b][1] - 1 && p1))
- {
- ro = insert_overflow (&s, &cell);
- ro->overflow[a][0] += p0 + axis_width (page, a,
- cell_ofs (cell.d[a][0]),
- cell_ofs (z0));
- if (z1 == z0 + 1)
- ro->overflow[a][1] += p1;
- if (page->h[a][0] && page->h[a][1])
- ro->overflow[a][0] -= page->join_crossing[a][cell.d[a][0] + 1];
- if (cell.d[a][1] > z1)
- ro->overflow[a][1] += axis_width (page, a, cell_ofs (z1),
- cell_ofs (cell.d[a][1]));
- }
- table_cell_free (&cell);
- }
+ d[a] = z0;
+ d[b] = z;
- for (z = 0; z < page->n[b]; z++)
- {
- struct table_cell cell;
- int d[TABLE_N_AXES];
+ table_get_cell (page->table, d[H], d[V], &cell);
+ overflow0 = p0 || cell.d[a][0] < z0;
+ overflow1 = cell.d[a][1] > z1 || (cell.d[a][1] == z1 && p1);
+ if (overflow0 || overflow1)
+ {
+ ro = insert_overflow (&s, &cell);
+
+ if (overflow0)
+ {
+ ro->overflow[a][0] += p0 + axis_width (
+ page, a, cell_ofs (cell.d[a][0]), cell_ofs (z0));
+ if (page->h[a][0] && page->h[a][1])
+ ro->overflow[a][0] -= page->join_crossing[a][cell.d[a][0]
+ + 1];
+ }
+
+ if (overflow1)
+ {
+ ro->overflow[a][1] += p1 + axis_width (
+ page, a, cell_ofs (z1), cell_ofs (cell.d[a][1]));
+ if (page->h[a][0] && page->h[a][1])
+ ro->overflow[a][1] -= page->join_crossing[a][cell.d[a][1]];
+ }
+ }
+ z = cell.d[b][1];
+ table_cell_free (&cell);
+ }
- /* XXX need to handle p1 below */
- d[a] = z1 - 1;
- d[b] = z;
- table_get_cell (page->table, d[H], d[V], &cell);
- if (z == cell.d[b][0] && cell.d[a][1] > z1
- && find_overflow_for_cell (&s, &cell) == NULL)
- {
- ro = insert_overflow (&s, &cell);
- ro->overflow[a][1] += axis_width (page, a, cell_ofs (z1),
- cell_ofs (cell.d[a][1]));
- }
- table_cell_free (&cell);
- }
+ if (!page->h[a][1] || z1 < page->n[a] - page->h[a][1] || p1)
+ for (z = 0; z < page->n[b]; )
+ {
+ struct table_cell cell;
+ int d[TABLE_N_AXES];
+
+ d[a] = z1 - 1;
+ d[b] = z;
+ table_get_cell (page->table, d[H], d[V], &cell);
+ if ((cell.d[a][1] > z1 || (cell.d[a][1] == z1 && p1))
+ && find_overflow_for_cell (&s, &cell) == NULL)
+ {
+ ro = insert_overflow (&s, &cell);
+ ro->overflow[a][1] += p1 + axis_width (page, a, cell_ofs (z1),
+ cell_ofs (cell.d[a][1]));
+ }
+ z = cell.d[b][1];
+ table_cell_free (&cell);
+ }
/* Copy overflows from PAGE into subpage. */
HMAP_FOR_EACH (ro, struct render_overflow, node, &page->overflows)
table_cell_free (&cell);
}
+ /* Copy footnotes from PAGE into subpage. */
+ HMAP_FOR_EACH (f, struct render_footnote, node, &page->footnotes)
+ if ((f->d[a][0] >= z0 && f->d[a][0] < z1)
+ || (f->d[a][1] - 1 >= z0 && f->d[a][1] - 1 < z1))
+ {
+ struct render_footnote *nf = xmalloc (sizeof *nf);
+ nf->d[a][0] = MAX (z0, f->d[a][0]) - z0 + page->h[a][0];
+ nf->d[a][1] = MIN (z1, f->d[a][1]) - z0 + page->h[a][0];
+ nf->d[b][0] = f->d[b][0];
+ nf->d[b][1] = f->d[b][1];
+ nf->idx = f->idx;
+ hmap_insert (&subpage->footnotes, &nf->node,
+ hash_cell (nf->d[H][0], nf->d[V][0]));
+ }
+
return subpage;
}
of = xzalloc (sizeof *of);
cell_to_subpage (s, cell, of->d);
hmap_insert (&s->subpage->overflows, &of->node,
- hash_overflow (of->d[H], of->d[V]));
+ hash_cell (of->d[H], of->d[V]));
old = find_overflow (s->page, cell->d[H][0], cell->d[V][0]);
if (old != NULL)
projects / pspp / blobdiff