1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
#include <apt-pkg/iprogress.h>
#include <apt-pkg/strutl.h>
#include <termios.h>
#include <sys/ioctl.h>
namespace APT {
namespace Progress {
void PackageManagerFancy::SetupTerminalScrollArea(int nr_rows)
{
// scroll down a bit to avoid visual glitch when the screen
// area shrinks by one row
std::cout << "\n";
// save cursor
std::cout << "\033[s";
// set scroll region (this will place the cursor in the top left)
std::cout << "\033[1;" << nr_rows - 1 << "r";
// restore cursor but ensure its inside the scrolling area
std::cout << "\033[u";
static const char *move_cursor_up = "\033[1A";
std::cout << move_cursor_up;
std::flush(std::cout);
}
PackageManagerFancy::PackageManagerFancy()
: nr_terminal_rows(-1)
{
struct winsize win;
if(ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&win) == 0)
{
nr_terminal_rows = win.ws_row;
}
}
void PackageManagerFancy::Started()
{
if (nr_terminal_rows > 0)
SetupTerminalScrollArea(nr_terminal_rows);
}
void PackageManagerFancy::Finished()
{
if (nr_terminal_rows > 0)
{
SetupTerminalScrollArea(nr_terminal_rows + 1);
// override the progress line (sledgehammer)
static const char* clear_screen_below_cursor = "\033[J";
std::cout << clear_screen_below_cursor;
}
}
void PackageManagerFancy::StatusChanged(std::string PackageName,
unsigned int StepsDone,
unsigned int TotalSteps)
{
int reporting_steps = _config->FindI("DpkgPM::Reporting-Steps", 1);
float percentage = StepsDone/(float)TotalSteps * 100.0;
if(percentage < (last_reported_progress + reporting_steps))
return;
std::string progress_str;
strprintf(progress_str, "Progress: [%3i%%]", (int)percentage);
int row = nr_terminal_rows;
static string save_cursor = "\033[s";
static string restore_cursor = "\033[u";
static string set_bg_color = "\033[42m"; // green
static string set_fg_color = "\033[30m"; // black
static string restore_bg = "\033[49m";
static string restore_fg = "\033[39m";
std::cout << save_cursor
// move cursor position to last row
<< "\033[" << row << ";0f"
<< set_bg_color
<< set_fg_color
<< progress_str
<< restore_cursor
<< restore_bg
<< restore_fg;
std::flush(std::cout);
last_reported_progress = percentage;
}
void PackageManagerText::StatusChanged(std::string PackageName,
unsigned int StepsDone,
unsigned int TotalSteps)
{
int reporting_steps = _config->FindI("DpkgPM::Reporting-Steps", 1);
float percentage = StepsDone/(float)TotalSteps * 100.0;
if(percentage < (last_reported_progress + reporting_steps))
return;
std::string progress_str;
strprintf(progress_str, "Progress: [%3i%%]", (int)percentage);
std::cout << progress_str << "\r\n";
std::flush(std::cout);
last_reported_progress = percentage;
}
}; // namespace progress
}; // namespace apt
|
