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|
#!/usr/bin/perl
#
# FixMyStreet:Map
# Adding the ability to have different maps on FixMyStreet.
#
# Copyright (c) 2010 UK Citizens Online Democracy. All rights reserved.
# Email: matthew@mysociety.org; WWW: http://www.mysociety.org/
package FixMyStreet::Map;
use strict;
use LWP::Simple;
use Problems;
use Cobrand;
use mySociety::Config;
use mySociety::Gaze;
use mySociety::GeoUtil;
use mySociety::Locale;
use mySociety::Web qw(ent NewURL);
use constant TILE_WIDTH => mySociety::Config::get('TILES_WIDTH');
use constant TIF_SIZE_M => mySociety::Config::get('TILES_TIFF_SIZE_METRES');
use constant TIF_SIZE_PX => mySociety::Config::get('TILES_TIFF_SIZE_PIXELS');
use constant SCALE_FACTOR => TIF_SIZE_M / (TIF_SIZE_PX / TILE_WIDTH);
sub header_js {
return '
<script type="text/javascript" src="/js/map-tilma.js"></script>
';
}
# display_map Q PARAMS
# PARAMS include:
# EASTING, NORTHING for the centre point of the map
# TYPE is 1 if the map is clickable, 2 if clickable and has a form upload,
# 0 if not clickable
# PINS is array of pins to show, location and colour
# PRE/POST are HTML to show above/below map
sub display_map {
my ($q, %params) = @_;
$params{pre} ||= '';
$params{post} ||= '';
my $mid_point = TILE_WIDTH; # Map is 2 TILE_WIDTHs in size, square.
if ($q->{site} eq 'barnet') { # Map is c. 380px wide
$mid_point = 189;
}
# X/Y tile co-ords may be overridden in the query string
my @vars = qw(x y);
my %input = map { $_ => $q->param($_) || '' } @vars;
($input{x}) = $input{x} =~ /^(\d+)/; $input{x} ||= 0;
($input{y}) = $input{y} =~ /^(\d+)/; $input{y} ||= 0;
my ($x, $y, $px, $py) = FixMyStreet::Map::os_to_px_with_adjust($q, $params{easting}, $params{northing}, $input{x}, $input{y});
my $pins = '';
foreach my $pin (@{$params{pins}}) {
my $pin_x = FixMyStreet::Map::os_to_px($pin->[0], $x);
my $pin_y = FixMyStreet::Map::os_to_px($pin->[1], $y, 1);
$pins .= FixMyStreet::Map::display_pin($q, $pin_x, $pin_y, $pin->[2]);
}
$px = defined($px) ? $mid_point - $px : 0;
$py = defined($py) ? $mid_point - $py : 0;
$x = int($x)<=0 ? 0 : $x;
$y = int($y)<=0 ? 0 : $y;
my $url = mySociety::Config::get('TILES_URL');
my $tiles_url = $url . ($x-1) . '-' . $x . ',' . ($y-1) . '-' . $y . '/RABX';
my $tiles = LWP::Simple::get($tiles_url);
return '<div id="map_box"> <div id="map"><div id="drag">' . _("Unable to fetch the map tiles from the tile server.") . '</div></div></div><div id="side">' if !$tiles;
my $tileids = RABX::unserialise($tiles);
my $tl = ($x-1) . '.' . $y;
my $tr = $x . '.' . $y;
my $bl = ($x-1) . '.' . ($y-1);
my $br = $x . '.' . ($y-1);
return '<div id="side">' if (!$tileids->[0][0] || !$tileids->[0][1] || !$tileids->[1][0] || !$tileids->[1][1]);
my $tl_src = $url . $tileids->[0][0];
my $tr_src = $url . $tileids->[0][1];
my $bl_src = $url . $tileids->[1][0];
my $br_src = $url . $tileids->[1][1];
my $out = '';
my $cobrand = Page::get_cobrand($q);
my $root_path_js = Cobrand::root_path_js($cobrand, $q);
my $cobrand_form_elements = Cobrand::form_elements($cobrand, 'mapForm', $q);
my $img_type;
my $form_action = Cobrand::url($cobrand, '', $q);
if ($params{type}) {
my $encoding = '';
$encoding = ' enctype="multipart/form-data"' if ($params{type}==2);
my $pc = $q->param('pc') || '';
my $pc_enc = ent($pc);
$out .= <<EOF;
<form action="$form_action" method="post" name="mapForm" id="mapForm"$encoding>
<input type="hidden" name="submit_map" value="1">
<input type="hidden" name="x" id="formX" value="$x">
<input type="hidden" name="y" id="formY" value="$y">
<input type="hidden" name="pc" value="$pc_enc">
$cobrand_form_elements
EOF
$img_type = '<input type="image"';
} else {
$img_type = '<img';
}
my $imgw = TILE_WIDTH . 'px';
my $tile_width = TILE_WIDTH;
my $tile_type = mySociety::Config::get('TILES_TYPE');
$out .= <<EOF;
<script type="text/javascript">
$root_path_js
var fixmystreet = {
'x': $x - 3,
'y': $y - 3,
'start_x': $px,
'start_y': $py,
'tile_type': '$tile_type',
'tilewidth': $tile_width,
'tileheight': $tile_width
};
</script>
<div id="map_box">
$params{pre}
<div id="map"><div id="drag">
$img_type alt="NW map tile" id="t2.2" name="tile_$tl" src="$tl_src" style="top:0px; left:0;">$img_type alt="NE map tile" id="t2.3" name="tile_$tr" src="$tr_src" style="top:0px; left:$imgw;"><br>$img_type alt="SW map tile" id="t3.2" name="tile_$bl" src="$bl_src" style="top:$imgw; left:0;">$img_type alt="SE map tile" id="t3.3" name="tile_$br" src="$br_src" style="top:$imgw; left:$imgw;">
<div id="pins">$pins</div>
</div>
EOF
if (Cobrand::show_watermark($cobrand) && mySociety::Config::get('TILES_TYPE') ne 'streetview') {
$out .= '<div id="watermark"></div>';
}
$out .= compass($q, $x, $y);
my $copyright;
if (mySociety::Config::get('TILES_TYPE') eq 'streetview') {
$copyright = _('Map contains Ordnance Survey data © Crown copyright and database right 2010.');
} else {
$copyright = _('© Crown copyright. All rights reserved. Ministry of Justice 100037819 2008.');
}
$out .= <<EOF;
</div>
<p id="copyright">$copyright</p>
$params{post}
EOF
$out .= '</div>';
$out .= '<div id="side">';
return $out;
}
sub display_map_end {
my ($type) = @_;
my $out = '</div>';
$out .= '</form>' if ($type);
return $out;
}
sub display_pin {
my ($q, $px, $py, $col, $num) = @_;
$num = '' if !$num || $num > 9;
my $host = Page::base_url_with_lang($q, undef);
my %cols = (red=>'R', green=>'G', blue=>'B', purple=>'P');
my $out = '<img class="pin" src="' . $host . '/i/pin' . $cols{$col}
. $num . '.gif" alt="' . _('Problem') . '" style="top:' . ($py-59)
. 'px; left:' . ($px) . 'px; position: absolute;">';
return $out unless $_ && $_->{id} && $col ne 'blue';
my $cobrand = Page::get_cobrand($q);
my $url = Cobrand::url($cobrand, NewURL($q, -retain => 1,
-url => '/report/' . $_->{id},
pc => undef,
x => undef,
y => undef,
sx => undef,
sy => undef,
all_pins => undef,
no_pins => undef), $q);
$out = '<a title="' . ent($_->{title}) . '" href="' . $url . '">' . $out . '</a>';
return $out;
}
sub map_features {
my ($q, $easting, $northing, $interval) = @_;
my $xx = FixMyStreet::Map::os_to_tile($easting);
my $yy = FixMyStreet::Map::os_to_tile($northing);
my $x = int($xx);
my $y = int($yy);
$x += 1 if ($xx - $x > 0.5);
$y += 1 if ($yy - $y > 0.5);
my $min_e = FixMyStreet::Map::tile_to_os($x-3); # Due to when the front-end AJAX look ups pins
my $min_n = FixMyStreet::Map::tile_to_os($y-3);
my $mid_e = FixMyStreet::Map::tile_to_os($x);
my $mid_n = FixMyStreet::Map::tile_to_os($y);
my $max_e = FixMyStreet::Map::tile_to_os($x+2);
my $max_n = FixMyStreet::Map::tile_to_os($y+2);
# list of problems aoround map can be limited, but should show all pins
my ($around_map, $around_map_list);
if (my $around_limit = Cobrand::on_map_list_limit(Page::get_cobrand($q))) {
$around_map_list = Problems::around_map($min_e, $max_e, $min_n, $max_n, $interval, $around_limit);
$around_map = Problems::around_map($min_e, $max_e, $min_n, $max_n, $interval, undef);
} else {
$around_map = $around_map_list = Problems::around_map($min_e, $max_e, $min_n, $max_n, $interval, undef);
}
my $dist;
mySociety::Locale::in_gb_locale {
my ($lat, $lon) = mySociety::GeoUtil::national_grid_to_wgs84($mid_e, $mid_n, 'G');
$dist = mySociety::Gaze::get_radius_containing_population($lat, $lon, 200000);
};
$dist = int($dist*10+0.5)/10;
my $limit = 20;
my @ids = map { $_->{id} } @$around_map_list;
my $nearby = Problems::nearby($dist, join(',', @ids), $limit, $mid_e, $mid_n, $interval);
return ($around_map, $around_map_list, $nearby, $dist);
}
sub map_pins {
my ($q, $x, $y, $sx, $sy, $interval) = @_;
my $e = FixMyStreet::Map::tile_to_os($x);
my $n = FixMyStreet::Map::tile_to_os($y);
my ($around_map, $around_map_list, $nearby, $dist) = FixMyStreet::Map::map_features($q, $e, $n, $interval);
my $pins = '';
foreach (@$around_map) {
my $px = FixMyStreet::Map::os_to_px($_->{easting}, $sx);
my $py = FixMyStreet::Map::os_to_px($_->{northing}, $sy, 1);
my $col = $_->{state} eq 'fixed' ? 'green' : 'red';
$pins .= FixMyStreet::Map::display_pin($q, $px, $py, $col);
}
foreach (@$nearby) {
my $px = FixMyStreet::Map::os_to_px($_->{easting}, $sx);
my $py = FixMyStreet::Map::os_to_px($_->{northing}, $sy, 1);
my $col = $_->{state} eq 'fixed' ? 'green' : 'red';
$pins .= FixMyStreet::Map::display_pin($q, $px, $py, $col);
}
return ($pins, $around_map_list, $nearby, $dist);
}
sub compass ($$$) {
my ($q, $x, $y) = @_;
my @compass;
for (my $i=$x-1; $i<=$x+1; $i++) {
for (my $j=$y-1; $j<=$y+1; $j++) {
$compass[$i][$j] = NewURL($q, x=>$i, y=>$j);
}
}
my $recentre = NewURL($q);
my $host = Page::base_url_with_lang($q, undef);
return <<EOF;
<table cellpadding="0" cellspacing="0" border="0" id="compass">
<tr valign="bottom">
<td align="right"><a rel="nofollow" href="${compass[$x-1][$y+1]}"><img src="$host/i/arrow-northwest.gif" alt="NW" width=11 height=11></a></td>
<td align="center"><a rel="nofollow" href="${compass[$x][$y+1]}"><img src="$host/i/arrow-north.gif" vspace="3" alt="N" width=13 height=11></a></td>
<td><a rel="nofollow" href="${compass[$x+1][$y+1]}"><img src="$host/i/arrow-northeast.gif" alt="NE" width=11 height=11></a></td>
</tr>
<tr>
<td><a rel="nofollow" href="${compass[$x-1][$y]}"><img src="$host/i/arrow-west.gif" hspace="3" alt="W" width=11 height=13></a></td>
<td align="center"><a rel="nofollow" href="$recentre"><img src="$host/i/rose.gif" alt="Recentre" width=35 height=34></a></td>
<td><a rel="nofollow" href="${compass[$x+1][$y]}"><img src="$host/i/arrow-east.gif" hspace="3" alt="E" width=11 height=13></a></td>
</tr>
<tr valign="top">
<td align="right"><a rel="nofollow" href="${compass[$x-1][$y-1]}"><img src="$host/i/arrow-southwest.gif" alt="SW" width=11 height=11></a></td>
<td align="center"><a rel="nofollow" href="${compass[$x][$y-1]}"><img src="$host/i/arrow-south.gif" vspace="3" alt="S" width=13 height=11></a></td>
<td><a rel="nofollow" href="${compass[$x+1][$y-1]}"><img src="$host/i/arrow-southeast.gif" alt="SE" width=11 height=11></a></td>
</tr>
</table>
EOF
}
# P is easting or northing
# C is centre tile reference of displayed map
sub os_to_px {
my ($p, $c, $invert) = @_;
return tile_to_px(os_to_tile($p), $c, $invert);
}
# Convert tile co-ordinates to pixel co-ordinates from top left of map
# C is centre tile reference of displayed map
sub tile_to_px {
my ($p, $c, $invert) = @_;
$p = TILE_WIDTH * ($p - $c + 1);
$p = 2 * TILE_WIDTH - $p if $invert;
$p = int($p + .5 * ($p <=> 0));
return $p;
}
# Tile co-ordinates are linear scale of OS E/N
# Will need more generalising when more zooms appear
sub os_to_tile {
return $_[0] / SCALE_FACTOR;
}
sub tile_to_os {
return int($_[0] * SCALE_FACTOR + 0.5);
}
sub click_to_tile {
my ($pin_tile, $pin, $invert) = @_;
$pin -= TILE_WIDTH while $pin > TILE_WIDTH;
$pin += TILE_WIDTH while $pin < 0;
$pin = TILE_WIDTH - $pin if $invert; # image submits measured from top down
return $pin_tile + $pin / TILE_WIDTH;
}
# Given some click co-ords (the tile they were on, and where in the
# tile they were), convert to OSGB36 and return.
sub click_to_os {
my ($pin_tile_x, $pin_x, $pin_tile_y, $pin_y) = @_;
my $tile_x = FixMyStreet::Map::click_to_tile($pin_tile_x, $pin_x);
my $tile_y = FixMyStreet::Map::click_to_tile($pin_tile_y, $pin_y, 1);
my $easting = FixMyStreet::Map::tile_to_os($tile_x);
my $northing = FixMyStreet::Map::tile_to_os($tile_y);
return ($easting, $northing);
}
# Given (E,N) and potential override (X,Y), return the X/Y tile for the centre
# of the map (either to get the point near the middle, or the override X,Y),
# and the pixel co-ords of the point, relative to that map.
sub os_to_px_with_adjust {
my ($q, $easting, $northing, $in_x, $in_y) = @_;
my $x = FixMyStreet::Map::os_to_tile($easting);
my $y = FixMyStreet::Map::os_to_tile($northing);
my $x_tile = $in_x || int($x);
my $y_tile = $in_y || int($y);
# Try and have point near centre of map
if (!$in_x && $x - $x_tile > 0.5) {
$x_tile += 1;
}
if (!$in_y && $y - $y_tile > 0.5) {
$y_tile += 1;
}
my $px = FixMyStreet::Map::os_to_px($easting, $x_tile);
my $py = FixMyStreet::Map::os_to_px($northing, $y_tile, 1);
if ($q->{site} eq 'barnet') { # Map is 380px, so might need to adjust
if (!$in_x && $px > 380) {
$x_tile++;
$px = FixMyStreet::Map::os_to_px($easting, $x_tile);
}
if (!$in_y && $py > 380) {
$y_tile--;
$py = FixMyStreet::Map::os_to_px($northing, $y_tile, 1);
}
}
return ($x_tile, $y_tile, $px, $py);
}
1;
|
