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Diffstat (limited to 'vehicle_gui.c')
-rw-r--r--vehicle_gui.c51
1 files changed, 50 insertions, 1 deletions
diff --git a/vehicle_gui.c b/vehicle_gui.c
index 2f74ab2b7..5c9888134 100644
--- a/vehicle_gui.c
+++ b/vehicle_gui.c
@@ -482,7 +482,7 @@ void ShowVehicleRefitWindow(const Vehicle *v, VehicleOrderID order)
}
/* Display additional text from NewGRF in the purchase information window */
-uint ShowAdditionalText(int x, int y, int w, EngineID engine)
+uint ShowAdditionalText(int x, int y, uint w, EngineID engine)
{
uint16 callback = GetVehicleCallback(CBID_VEHICLE_ADDITIONAL_TEXT, 0, 0, engine, NULL);
if (callback == CALLBACK_FAILED) return 0;
@@ -492,6 +492,55 @@ uint ShowAdditionalText(int x, int y, int w, EngineID engine)
return DrawStringMultiLine(x, y, STR_02BD, w);
}
+/* Count the number of bits that are set in a mask */
+static uint CountBits(uint32 mask)
+{
+ uint c = 0;
+ for (; mask != 0; mask >>= 1) if (HASBIT(mask, 0)) c++;
+ return c;
+}
+
+/* Display list of cargo types of the engine, for the purchase information window */
+uint ShowRefitOptionsList(int x, int y, uint w, EngineID engine)
+{
+ /* List of cargo types of this engine */
+ uint32 cmask = EngInfo(engine)->refit_mask;
+ /* List of cargo types available in this climate */
+ uint32 lmask = _landscape_global_cargo_mask[_opt.landscape];
+ char *b = _userstring;
+
+ /* Draw nothing if the engine is not refittable */
+ if (CountBits(cmask) <= 1) return 0;
+
+ b = InlineString(b, STR_PURCHASE_INFO_REFITTABLE_TO);
+
+ if (cmask == lmask) {
+ /* Engine can be refitted to all types in this climate */
+ b = InlineString(b, STR_PURCHASE_INFO_ALL_TYPES);
+ } else {
+ CargoID cid;
+
+ /* Check if we are able to refit to more cargo types and unable to. If
+ * so, invert the cargo types to list those that we can't refit to. */
+ if (CountBits(cmask ^ lmask) < CountBits(cmask)) {
+ cmask ^= lmask;
+ b = InlineString(b, STR_PURCHASE_INFO_ALL_BUT);
+ }
+
+ /* Add each cargo type to the list */
+ for (cid = 0; cmask != 0; cmask >>= 1, cid++) {
+ if (!HASBIT(cmask, 0)) continue;
+
+ b = InlineString(b, _cargoc.names_s[_local_cargo_id_ctype[cid]]);
+ if (cmask > 1) b = strecpy(b, ", ", lastof(_userstring));
+ }
+ }
+
+ /* Terminate and display the completed string */
+ *b = '\0';
+ return DrawStringMultiLine(x, y, STR_SPEC_USERSTRING, w);
+}
+
// if the sorting criteria had the same value, sort vehicle by unitnumber
#define VEHICLEUNITNUMBERSORTER(r, a, b) {if (r == 0) {r = a->unitnumber - b->unitnumber;}}