Introduce LFUN_SCROLL.

[features.git] / src / BufferView.cpp

diff --git a/src/BufferView.cpp b/src/BufferView.cpp
index b160285c1326b8ddbe1a9c1d25918ccb8136fb43..7afe959d586557692b90f6d9e9b566d758bd633d 100644 (file)
--- a/src/BufferView.cpp
+++ b/src/BufferView.cpp
@@ -830,6 +830,7 @@ FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 
        case LFUN_SCREEN_UP:
        case LFUN_SCREEN_DOWN:
+       case LFUN_SCROLL:
                flag.enabled(true);
                break;
 
@@ -1218,6 +1219,10 @@ bool BufferView::dispatch(FuncRequest const & cmd)
                break;
        }
 
+       case LFUN_SCROLL:
+               lfunScroll(cmd);
+               break;
+
        case LFUN_SCREEN_UP_SELECT:
        case LFUN_SCREEN_DOWN_SELECT: {
                // Those two are not ready yet for consumption.
@@ -1408,6 +1413,27 @@ void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
 }
 
 
+void BufferView::lfunScroll(FuncRequest const & cmd)
+{
+       string const scroll_type = cmd.getArg(0);
+       int const scroll_step = 
+               (scroll_type == "line")? d->scrollbarParameters_.lineScrollHeight
+               : (scroll_type == "page")? height_ : 0;
+       if (scroll_step == 0)
+               return;
+       string const scroll_quantity = cmd.getArg(1);
+       if (scroll_quantity == "up")
+               scrollUp(scroll_step);
+       else if (scroll_quantity == "down")
+               scrollDown(scroll_step);
+       else {
+               int const scroll_value = convert<int>(scroll_quantity);
+               if (scroll_value)
+                       scroll(scroll_step * scroll_value);
+       }
+}
+
+
 void BufferView::scroll(int y)
 {
        if (y > 0)