From d7eaae0e2c816c0727ba0a1a5e497a934e0289b6 Mon Sep 17 00:00:00 2001
From: Joursoir <chat@joursoir.net>
Date: Sat, 11 Dec 2021 21:50:16 +0300
Subject: dialog-box: make handling keyboard actions and highlighting of
 widgets

---
 Library/UefiShellUfmCommandLib/dialog-box.c | 58 +++++++++++++++++++++++++++++
 Library/UefiShellUfmCommandLib/dialog-box.h | 19 ++++++++++
 2 files changed, 77 insertions(+)

diff --git a/Library/UefiShellUfmCommandLib/dialog-box.c b/Library/UefiShellUfmCommandLib/dialog-box.c
index 0da3fae..c6cbe62 100644
--- a/Library/UefiShellUfmCommandLib/dialog-box.c
+++ b/Library/UefiShellUfmCommandLib/dialog-box.c
@@ -6,10 +6,40 @@
 
 #define COLOR_WHITE_CYAN (EFI_TEXT_ATTR(EFI_WHITE, EFI_CYAN))
 #define COLOR_WHITE_LIGHTGRAY (EFI_TEXT_ATTR(EFI_WHITE, EFI_LIGHTGRAY))
+#define HIGHLIGHT(w, active) \
+	whline(w, 0, 0, 0, active ? COLOR_WHITE_CYAN : COLOR_WHITE_LIGHTGRAY, 0)
 
 CONST CHAR16 ok_button_msg[] = L"[ OK ]";
 CONST CHAR16 cl_button_msg[] = L"[ Cancel ]";
 
+STATIC VOID highlight_widget(struct dbox_ctx *dbox, enum dbox_widgets wid, BOOLEAN active)
+{
+	if(wid == DBOX_OK_BUTTON) {
+		HIGHLIGHT(dbox->wok, active);
+		wrefresh(dbox->wok);
+	}
+	else if(wid == DBOX_CL_BUTTON) {
+		HIGHLIGHT(dbox->wcl, active);
+		wrefresh(dbox->wcl);
+	}
+	else if(wid == DBOX_INPUT_BOX)
+		input_update(dbox->in);
+}
+
+STATIC VOID set_active_widget(struct dbox_ctx *dbox, enum dbox_widgets wid)
+{
+	enum dbox_widgets extreme_val = dbox->in ? DBOX_END_WID : DBOX_INPUT_BOX;
+
+	if(wid <= DBOX_START_WID)
+		wid = extreme_val - 1;
+	else if(wid >= extreme_val)
+		wid = DBOX_START_WID + 1;
+
+	highlight_widget(dbox, dbox->active_widget, FALSE);
+	dbox->active_widget = wid;
+	highlight_widget(dbox, dbox->active_widget, TRUE);
+}
+
 struct dbox_ctx *dbox_alloc(struct screen *scr, CONST CHAR16 *title,
 	CONST CHAR16 *label, BOOLEAN wid_input, CONST CHAR16 *input_text)
 {
@@ -54,11 +84,13 @@ struct dbox_ctx *dbox_alloc(struct screen *scr, CONST CHAR16 *title,
 	if(!dbox->wok)
 		break;
 	mvwprintf(dbox->wok, 0, 0, ok_button_msg);
+	HIGHLIGHT(dbox->wok, !wid_input);
 
 	dbox->wcl = newwin(scr, len_cl, 1, start_ok + 1 + len_ok, start_y + dbox_height - 2);
 	if(!dbox->wcl)
 		break;
 	mvwprintf(dbox->wcl, 0, 0, cl_button_msg);
+	HIGHLIGHT(dbox->wcl, FALSE);
 
 	for(y = 0; y < dbox_height; y++)
 		whline(dbox->wbg, 0, y, 0, COLOR_WHITE_LIGHTGRAY, 0);
@@ -91,6 +123,32 @@ VOID dbox_release(struct dbox_ctx *dbox)
 	FreePool(dbox);
 }
 
+BOOLEAN dbox_handle(struct dbox_ctx *dbox)
+{
+	EFI_INPUT_KEY key;
+
+	set_active_widget(dbox, dbox->in ? DBOX_INPUT_BOX : DBOX_OK_BUTTON);
+	for(;;)
+	{
+		key = wgetch(dbox->wbg);
+
+		if(key.ScanCode == SCAN_ESC)
+			return FALSE;
+		else if(key.ScanCode == SCAN_UP)
+			set_active_widget(dbox, dbox->active_widget - 1);
+		else if(key.ScanCode == SCAN_DOWN)
+			set_active_widget(dbox, dbox->active_widget + 1);
+		else if(key.UnicodeChar == CHAR_LINEFEED || key.UnicodeChar == CHAR_CARRIAGE_RETURN) {
+			if(dbox->active_widget == DBOX_CL_BUTTON)
+				return FALSE;
+
+			return TRUE;
+		}
+		else if(dbox->active_widget == DBOX_INPUT_BOX)
+			input_handle_char(dbox->in, key);
+	}
+}
+
 VOID dbox_refresh(struct dbox_ctx *dbox)
 {
 	wrefresh(dbox->wbg);
diff --git a/Library/UefiShellUfmCommandLib/dialog-box.h b/Library/UefiShellUfmCommandLib/dialog-box.h
index d6d6e43..4d7e899 100644
--- a/Library/UefiShellUfmCommandLib/dialog-box.h
+++ b/Library/UefiShellUfmCommandLib/dialog-box.h
@@ -4,10 +4,20 @@
 #include <Uefi.h>
 #include "widget/input.h"
 
+enum dbox_widgets {
+	DBOX_START_WID = 0,
+	DBOX_OK_BUTTON,
+	DBOX_CL_BUTTON,
+	DBOX_INPUT_BOX,
+	DBOX_END_WID
+};
+
 struct dbox_ctx {
 	struct window *wbg;
 	struct widget_input *in;
 	struct window *wok, *wcl;
+
+	enum dbox_widgets active_widget;
 };
 
 /*
@@ -35,6 +45,15 @@ struct dbox_ctx *dbox_alloc(struct screen *scr, CONST CHAR16 *title,
 */
 VOID dbox_release(struct dbox_ctx *dbox);
 
+/*
+ * Handles all keyboard actions in the dialog box
+ *
+ * dbox: the dialog box on which to operate
+ *
+ * return: TRUE if user pressed OK. Otherwise FALSE
+*/
+BOOLEAN dbox_handle(struct dbox_ctx *dbox);
+
 /*
  * Does the output of dialog box to the terminal
  *
-- 
cgit v1.2.3-18-g5258