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100 lines
2.1 KiB
C++
100 lines
2.1 KiB
C++
#include <QtMath>
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#include <QFileInfo>
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#include "common/rectc.h"
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#include "demloader.h"
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#define DOWNLOAD_LIMIT 16
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static QList<DEM::Tile> tiles(const RectC &rect)
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{
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QList<DEM::Tile> list;
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if (rect.isNull())
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return list;
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for (int i = qFloor(rect.top()); i >= qFloor(rect.bottom()); i--)
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for (int j = qFloor(rect.left()); j <= qFloor(rect.right()); j++)
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list.append(DEM::Tile(j, i));
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return list;
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}
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static bool isZip(const QUrl &url)
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{
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QFileInfo fi(url.fileName());
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return (fi.suffix().toLower() == "zip");
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}
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DEMLoader::DEMLoader(const QString &dir, QObject *parent)
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: QObject(parent), _dir(dir)
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{
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_downloader = new Downloader(this);
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connect(_downloader, &Downloader::finished, this, &DEMLoader::finished);
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}
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bool DEMLoader::loadTiles(const RectC &rect)
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{
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QList<DEM::Tile> tl(tiles(rect));
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QList<Download> dl;
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/* Create the user DEM dir only when a download is requested as it will
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override the global DEM dir. */
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if (!_dir.mkpath(_dir.absolutePath())) {
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qWarning("%s: %s", qPrintable(_dir.canonicalPath()),
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"Error creating DEM directory");
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return false;
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}
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DEM::setDir(_dir.path());
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for (int i = 0; i < tl.size(); i++) {
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const DEM::Tile &t = tl.at(i);
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QString fn(tileFile(t));
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QString zn(fn + ".zip");
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if (!(QFileInfo::exists(zn) || QFileInfo::exists(fn))) {
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QUrl url(tileUrl(t));
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dl.append(Download(url, isZip(url) ? zn : fn));
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}
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if (dl.size() > DOWNLOAD_LIMIT) {
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qWarning("DEM download limit exceeded.");
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return false;
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}
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}
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return _downloader->get(dl, _authorization);
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}
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bool DEMLoader::checkTiles(const RectC &rect) const
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{
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QList<DEM::Tile> tl(tiles(rect));
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for (int i = 0; i < tl.size(); i++) {
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const DEM::Tile &t = tl.at(i);
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QString fn(tileFile(t));
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QString zn(fn + ".zip");
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if (!(QFileInfo::exists(zn) || QFileInfo::exists(fn)))
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return false;
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}
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return true;
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}
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QUrl DEMLoader::tileUrl(const DEM::Tile &tile) const
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{
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QString url(_url);
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url.replace("$lon", tile.lonStr());
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url.replace("$lat", tile.latStr());
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return QUrl(url);
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}
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QString DEMLoader::tileFile(const DEM::Tile &tile) const
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{
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return _dir.absoluteFilePath(tile.baseName());
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}
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