LibLine: Refactor suggestion handling and display logic out

1 files changed, 90 insertions, 0 deletions

diff --git a/Libraries/LibLine/SuggestionDisplay.h b/Libraries/LibLine/SuggestionDisplay.h
new file mode 100644
index 0000000000..77393c0641
--- /dev/null
+++ b/Libraries/LibLine/SuggestionDisplay.h
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2020, The SerenityOS developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+#include <AK/Forward.h>
+#include <AK/String.h>
+#include <LibLine/SuggestionManager.h>
+#include <stdlib.h>
+
+namespace Line {
+
+class Editor;
+
+class SuggestionDisplay {
+public:
+    virtual ~SuggestionDisplay() { }
+    virtual void display(const SuggestionManager&) = 0;
+    virtual bool cleanup() = 0;
+    virtual void set_initial_prompt_lines(size_t) = 0;
+
+    virtual void set_vt_size(size_t lines, size_t columns) = 0;
+
+    size_t origin_x() const { return m_origin_x; }
+    size_t origin_y() const { return m_origin_y; }
+
+    void set_origin(int x, int y, Badge<Editor>)
+    {
+        m_origin_x = x;
+        m_origin_y = y;
+    }
+
+protected:
+    int m_origin_x { 0 };
+    int m_origin_y { 0 };
+};
+
+class XtermSuggestionDisplay : public SuggestionDisplay {
+public:
+    XtermSuggestionDisplay(size_t lines, size_t columns)
+        : m_num_lines(lines)
+        , m_num_columns(columns)
+    {
+    }
+    virtual ~XtermSuggestionDisplay() override { }
+    virtual void display(const SuggestionManager&) override;
+    virtual bool cleanup() override;
+
+    virtual void set_initial_prompt_lines(size_t lines) override
+    {
+        m_prompt_lines_at_suggestion_initiation = lines;
+    }
+
+    virtual void set_vt_size(size_t lines, size_t columns) override
+    {
+        m_num_lines = lines;
+        m_num_columns = columns;
+    }
+
+private:
+    size_t m_lines_used_for_last_suggestions { 0 };
+    size_t m_num_lines { 0 };
+    size_t m_num_columns { 0 };
+    size_t m_prompt_lines_at_suggestion_initiation { 0 };
+    size_t m_prompt_length { 0 };
+};
+
+}