Add support for quickly reading text pasted into the terminal

Fixes #1.

src/docview.cc

@@ -28,7 +28,12 @@ void DocumentView::handleEvent(TEvent &ev)
         case evKeyDown:
             if (ev.keyDown.keyCode == kbIns)
                 setState(sfCursorIns, Boolean(!getState(sfCursorIns)));
-            editor.KeyDownWithModifiers(ev.keyDown, nullptr);
+            // If we always began reading events in consumeInputText,
+            // we would never autoindent newlines.
+            if (!ev.keyDown.textLength)
+                editor.KeyDownWithModifiers(ev.keyDown, nullptr);
+            else
+                consumeInputText(ev);
             handled = true;
             break;
         case evMouseDown:
@@ -75,6 +80,43 @@ void DocumentView::handleEvent(TEvent &ev)
     }
 }
 
+void DocumentView::consumeInputText(TEvent &ev)
+{
+    size_t count = 0;
+    std::vector<char> buf;
+    auto push = [&buf] (std::string_view text) {
+        buf.insert(buf.end(), text.data(), text.data()+text.size());
+    };
+
+    do {
+        if (ev.what == evKeyDown) {
+            if (ev.keyDown.keyCode == kbEnter)
+                push("\n");
+            else if (ev.keyDown.keyCode == kbTab)
+                push("\t");
+            else if (ev.keyDown.textLength)
+                push(ev.keyDown.asText());
+            else
+                break;
+        } else
+            break;
+        ++count;
+        getImmediateEvent(ev);
+    } while (true);
+    // Put non-text event back into the queue.
+    if (count && ev.what != evNothing)
+        putEvent(ev);
+
+    if (buf.size()) {
+        if (count > 2) // 1 may be too easy to trigger just by typing fast.
+            editor.WndProc(SCI_BEGINUNDOACTION, 0U, 0U);
+        editor.pasteText({buf.data(), buf.size()});
+        editor.WndProc(SCI_SCROLLCARET, 0U, 0U);
+        if (count > 2)
+            editor.WndProc(SCI_ENDUNDOACTION, 0U, 0U);
+    }
+}
+
 void DocumentView::draw()
 {
     auto [x, y] = editor.getCaretPosition();

src/docview.h

@@ -21,6 +21,8 @@ struct DocumentView : public TSurfaceView {
     void handleEvent(TEvent &ev) override;
     void draw() override;
 
+    void consumeInputText(TEvent &ev);
+
 };
 
 #endif

src/editwindow.cc

@@ -357,6 +357,7 @@ void EditorWindow::notify(SCNotification scn)
         case SCN_CHARADDED:
             if (scn.ch == '\n')
                 indent.autoIndentCurrentLine(editor);
+            break;
     }
 }
 

src/tscintilla.h

@@ -7,6 +7,7 @@
 #include <tvision/tv.h>
 
 #include <ScintillaHeaders.h>
+#include <string_view>
 
 struct DocumentView;
 class TDrawSurface;
@@ -55,6 +56,7 @@ struct TScintillaEditor : public ScintillaBase {
     void setWindow(TDrawSurface *wid);
     void setParent(TScintillaWindow *parent_);
     void changeSize();
+    void pasteText(std::string_view text);
     Sci::Line getFirstVisibleDocumentLine();
     TPoint getCaretPosition();
     TPoint getDelta();
@@ -76,6 +78,11 @@ inline void TScintillaEditor::changeSize()
     ScintillaBase::ChangeSize();
 }
 
+inline void TScintillaEditor::pasteText(std::string_view text)
+{
+    InsertPasteShape(text.data(), text.size(), pasteStream);
+}
+
 inline Sci::Line TScintillaEditor::getFirstVisibleDocumentLine()
 {
     return pcs->DocFromDisplay(topLine);