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[boot] Add framebuffer progress bar

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After exiting UEFI, the bootloader had no way of displaying status to
the user. Now it will display a series of small boxes as a progress bar
along the bottom of the screen if a framebuffer exists. Errors or
warnings during a step will cause that step's box to turn red or orange,
and display bars above it to signal the error code.

This caused the simplification of the error handling system (which was
mostly just calling status_line::fail) and added different types of
status objects.
This commit is contained in:
Justin C. Miller
2021-01-08 22:25:37 -08:00
parent 1ba44c99d1
commit 61845b8761
13 changed files with 457 additions and 293 deletions
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44
src/boot/console.h
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@@ -1,5 +1,5 @@
/// \file console.h
/// Text output and status message handling
/// Text output handler
#pragma once
#include <stdarg.h>
#include <stddef.h>
@@ -42,46 +42,4 @@ private:
static console *s_console;
};
/// Scoped status line reporter. Prints a message and an "OK" if no errors
/// or warnings were reported before destruction, otherwise reports the
/// error or warning.
class status_line
{
public:
/// Constructor.
/// \arg message Description of the operation in progress
/// \arg context If non-null, printed after `message` and a colon
status_line(const wchar_t *message, const wchar_t *context = nullptr);
~status_line();
/// Set the state to warning, and print a message. If the state is already at
/// warning or error, the state is unchanged but the message is still printed.
/// \arg message The warning message to print
/// \arg error If non-null, printed after `message`
inline static void warn(const wchar_t *message, const wchar_t *error = nullptr) {
if (s_current) s_current->do_warn(message, error);
}
/// Set the state to error, and print a message. If the state is already at
/// error, the state is unchanged but the message is still printed.
/// \arg message The error message to print
/// \arg error If non-null, printed after `message`
inline static void fail(const wchar_t *message, const wchar_t *error = nullptr) {
if (s_current) s_current->do_fail(message, error);
}
private:
void print_status_tag();
void do_warn(const wchar_t *message, const wchar_t *error);
void do_fail(const wchar_t *message, const wchar_t *error);
void finish();
size_t m_line;
int m_level;
int m_depth;
status_line *m_next;
static status_line *s_current;
};
} // namespace boot