Clipboard

src/text_editor/buffer_history.cpp

@@ -104,7 +104,7 @@ void AfterEdit(Buffer *buffer, Array<Edit> *edits, Array<Caret> *carets) {
     buffer->debug_edit_phase -= 2;
     HistoryEntry *entry = GetLast(buffer->undo_stack);
 
-#if 1
+#if BUFFER_DEBUG
     Assert(entry->carets.len);
     Assert(entry->edits.len);
     for (Int i = 0; i < edits->len - 1; i += 1) {
@@ -133,8 +133,4 @@ void AfterEdit(Buffer *buffer, Array<Edit> *edits, Array<Caret> *carets) {
         }
     }
     for (Int i = 0; i < carets->len; i += 1) carets->data[i] = new_carets[i];
-
-    // Make sure all carets are in range
-    // @todo: remove?
-    For(*carets) it.range = Clamp(*buffer, it.range);
 }

src/text_editor/string16.cpp

@@ -49,3 +49,28 @@ bool AreEqual(String16 a, String16 b, unsigned ignore_case = false) {
 }
 inline bool operator==(String16 a, String16 b) { return AreEqual(a, b); }
 inline bool operator!=(String16 a, String16 b) { return !AreEqual(a, b); }
+
+String16 Merge(Allocator allocator, Array<String16> list, String16 separator = " ") {
+    int64_t char_count = 0;
+    For(list) char_count += it.len;
+    if (char_count == 0) return {};
+    int64_t node_count = list.len;
+
+    int64_t  base_size = (char_count + 1);
+    int64_t  sep_size  = (node_count - 1) * separator.len;
+    int64_t  size      = base_size + sep_size;
+    wchar_t *buff      = (wchar_t *)AllocSize(allocator, sizeof(wchar_t) * (size + 1));
+    String16 string    = {buff, 0};
+    For(list) {
+        Assert(string.len + it.len <= size);
+        memcpy(string.data + string.len, it.data, it.len * sizeof(wchar_t));
+        string.len += it.len;
+        if (!IsLast(list, it)) {
+            memcpy(string.data + string.len, separator.data, separator.len * sizeof(wchar_t));
+            string.len += separator.len;
+        }
+    }
+    Assert(string.len == size - 1);
+    string.data[size] = 0;
+    return string;
+}

src/text_editor/text_editor.cpp

@@ -22,13 +22,12 @@
 #include "colors.cpp"
 
 #include "view.h"
+#include "view_commands_clipboard.cpp"
 #include "view_commands.cpp"
 #include "view_draw.cpp"
 
 /*
-- Ctrl + Z, Ctrl + C - Undo redo history
 - Ctrl + D - create new cursor at next occurence of word
-- Ctrl + X, Ctrl + C, Ctrl + V - Copy paste
 - Scrollbars
 - Line numbers
 - file info bar at bottom (line, column, line endings)

src/text_editor/view_commands.cpp

@@ -222,6 +222,15 @@ void HandleKeybindings(View *_view) {
         UndoEdit(&buf, &view.carets);
     }
 
+    if (CtrlPress(KEY_C)) {
+        Command_Copy(&view);
+    } else if (CtrlPress(KEY_V)) {
+        Command_Paste(&view);
+    } else if (CtrlPress(KEY_X)) {
+        Command_Copy(&view);
+        Command_Replace(&view, L"");
+    }
+
     if (ShiftPress(KEY_PAGE_UP)) {
         Command_MoveCursorsByPageSize(&view, DIR_UP, SHIFT_PRESSED);
     } else if (Press(KEY_PAGE_UP)) {

src/text_editor/view_commands_clipboard.cpp

@@ -0,0 +1,67 @@
+String16        SavedClipboardString;
+Array<String16> SavedClipboardCursors;
+
+void Command_Copy(View *view) {
+    Allocator sys_allocator = GetSystemAllocator();
+
+    SavedClipboardCursors.allocator = sys_allocator;
+    if (SavedClipboardCursors.data) {
+        For(SavedClipboardCursors) Dealloc(sys_allocator, &it.data);
+        SavedClipboardCursors.len = 0;
+    }
+
+    if (SavedClipboardString.data) {
+        Dealloc(sys_allocator, &SavedClipboardString.data);
+        SavedClipboardString = {};
+    }
+
+    // First, if there is no selection - select the entire line
+    For(view->carets) {
+        if (GetSize(it.range) == 0) {
+            Int   line       = PosToLine(*view->buffer, it.range.min);
+            Range line_range = GetLineRange(*view->buffer, line);
+            it.range         = line_range;
+        }
+    }
+
+    For(view->carets) {
+        String16 string = GetString(*view->buffer, it.range);
+        String16 copy   = Copy(sys_allocator, string);
+        Add(&SavedClipboardCursors, copy);
+    }
+
+    // @todo: maybe only add new line if there is no new line at the end, experiment with it
+    SavedClipboardString = Merge(sys_allocator, SavedClipboardCursors, L"\n");
+    Scratch scratch;
+    SetClipboardText(ToString(scratch, SavedClipboardString).data);
+}
+
+void Command_Paste(View *view) {
+    Scratch     scratch;
+    const char *text    = GetClipboardText();
+    String      string_ = text;
+    String16    string  = ToString16(scratch, string_);
+
+    // Regular paste
+    if (string != SavedClipboardString || SavedClipboardCursors.len != view->carets.len) {
+        BeforeEdit(view->buffer, view->carets);
+        MergeCarets(&view->carets);
+        Array<Edit> edits = {scratch};
+        For(view->carets) AddEdit(&edits, it.range, string);
+        ApplyEdits(view->buffer, edits);
+        AfterEdit(view->buffer, &edits, &view->carets);
+        return;
+    }
+
+    // Multicursor paste
+    BeforeEdit(view->buffer, view->carets);
+    MergeCarets(&view->carets);
+    Array<Edit> edits = {scratch};
+    for (int64_t i = 0; i < view->carets.len; i += 1) {
+        String16 string = SavedClipboardCursors[i];
+        Caret   &it     = view->carets[i];
+        AddEdit(&edits, it.range, string);
+    }
+    ApplyEdits(view->buffer, edits);
+    AfterEdit(view->buffer, &edits, &view->carets);
+}