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/* Copyright 2015, Sebastian Reichel <sre@ring0.de>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
[DBus (name = "io.mainframe.shopsystem.StockPDF")]
public class StockPDF {
/* A4 sizes (in points, 72 DPI) */
private const double a4w = 595.27559; /* 210mm */
private const double a4h = 841.88976; /* 297mm */
private const double eanw = 100.0;
private const double eanh = 15.0;
private const double col1 = 40;
private const double col2 = 145;
private const double col3 = 400;
private const double col4 = 480;
private const double col5 = 550;
private const double row0 = 50;
private const double row1 = 65;
private const double padding = 3;
private int64 timestamp;
uint page;
double y;
EAN ean;
Cairo.Context ctx;
Pango.Layout layout;
DetailedProduct[] stock;
/* pdf data */
private uint8[] data;
private uint useddatalength;
private void render_page_header() {
var dt = new DateTime.from_unix_local(timestamp);
ctx.move_to(145, 25);
ctx.set_font_size(15.0);
var date = dt.format("%Y-%m-%d %H:%M:%S");
ctx.show_text(@"Shopsystem Stock - State: $date");
}
private void render_page_footer() {
ctx.move_to(277, 820);
ctx.set_font_size(12.0);
ctx.show_text(@"Page $page");
}
private void render_table_header() {
ctx.save();
/* border & font color */
ctx.set_source_rgb(0, 0, 0);
/* line width of the border */
ctx.set_line_width(0.8);
/* header font */
ctx.select_font_face("LMSans10", Cairo.FontSlant.NORMAL, Cairo.FontWeight.BOLD);
ctx.set_font_size(12);
ctx.move_to(col1, row0);
ctx.line_to(col5, row0);
ctx.line_to(col5, row1);
ctx.line_to(col1, row1);
ctx.line_to(col1, row0);
ctx.move_to(col2, row0);
ctx.line_to(col2, row1);
ctx.move_to(col3, row0);
ctx.line_to(col3, row1);
ctx.move_to(col4, row0);
ctx.line_to(col4, row1);
ctx.stroke();
/* header text */
ctx.move_to(col1 + padding, row1 - padding);
ctx.show_text("EAN");
ctx.move_to(col2 + padding, row1 - padding);
ctx.show_text("Produkt");
ctx.move_to(col3 + padding, row1 - padding);
ctx.show_text("Anzahl");
ctx.move_to(col4 + padding, row1 - padding);
ctx.show_text("Zählung");
ctx.restore();
}
private void render_table_row(DetailedProduct product) throws BarcodeError {
ctx.set_line_width(0.8);
/* borders */
ctx.move_to(col1, y);
ctx.line_to(col1, y + eanh + 2*padding);
ctx.line_to(col5, y + eanh + 2*padding);
ctx.line_to(col5, y);
ctx.move_to(col2, y);
ctx.line_to(col2, y + eanh + 2*padding);
ctx.move_to(col3, y);
ctx.line_to(col3, y + eanh + 2*padding);
ctx.move_to(col4, y);
ctx.line_to(col4, y + eanh + 2*padding);
ctx.stroke();
/* EAN */
ctx.move_to(col1 + padding, y + padding);
ean.draw(@"$(product.ean)");
/* Product Name */
ctx.move_to(col2 + padding, y);
layout.set_alignment(Pango.Alignment.LEFT);
layout.set_wrap(Pango.WrapMode.WORD_CHAR);
layout.set_spacing((int) (-padding * Pango.SCALE));
layout.set_width((int) (col3-col2) * Pango.SCALE);
var text = @"$(product.ean)\n$(product.name)";
layout.set_text(text, text.length);
Pango.cairo_update_layout(ctx, layout);
Pango.cairo_show_layout(ctx, layout);
/* Amount */
ctx.set_font_size(16.0);
ctx.move_to(col3 + padding, y + eanh + 1);
ctx.show_text(@"$(product.amount)");
}
private Cairo.Status pdf_write(uchar[] newdata) {
if(data == null) {
data = newdata;
useddatalength = newdata.length;
} else {
if(useddatalength + newdata.length > data.length) {
uint8[] alldata = new uint8[data.length + newdata.length + 512];
Posix.memcpy(alldata, data, data.length);
data = alldata;
}
Posix.memcpy((uint8*) data + useddatalength, newdata, newdata.length);
useddatalength += newdata.length;
}
return Cairo.Status.SUCCESS;
}
public uint8[] generate() throws DBusError, IOError {
data = null;
var surface = new Cairo.PdfSurface.for_stream(pdf_write, a4w, a4h);
ctx = new Cairo.Context(surface);
ean = new EAN(ctx, eanw, eanh);
layout = Pango.cairo_create_layout(ctx);
var font = new Pango.FontDescription();
font.set_family("LMRoman8");
font.set_size((int) 6.0 * Pango.SCALE);
layout.set_font_description(font);
/* get stock */
try {
Database db = Bus.get_proxy_sync(BusType.SYSTEM, "io.mainframe.shopsystem.Database", "/io/mainframe/shopsystem/database");
stock = db.get_stock();
timestamp = new DateTime.now_local().to_unix();
} catch(IOError e) {
return data;
}
/* render pdf */
ctx.select_font_face("LMSans10", Cairo.FontSlant.NORMAL, Cairo.FontWeight.NORMAL);
try {
y = row1;
page = 1;
render_page_header();
render_table_header();
foreach(var p in stock) {
render_table_row(p);
y += eanh + 6;
if(y > 780) {
y = row1;
render_page_footer();
ctx.show_page();
page++;
render_page_header();
render_table_header();
}
}
render_page_footer();
} catch(BarcodeError e) {
stderr.printf(e.message + "\n");
}
surface.finish();
surface.flush();
/* cleanup */
ean = null;
ctx = null;
surface = null;
return data;
}
}
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