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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
/*
* Copyright (c) 2021, Nicholas Hollett <niax@niax.co.uk>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "FlameGraphView.h"
#include "DevTools/Profiler/Profile.h"
#include "LibGfx/Forward.h"
#include <AK/Function.h>
#include <LibGUI/Painter.h>
#include <LibGUI/Widget.h>
#include <LibGfx/FontDatabase.h>
#include <LibGfx/Palette.h>
namespace Profiler {
constexpr int bar_rounding = 2;
constexpr int bar_margin = 2;
constexpr int bar_padding = 8;
constexpr int bar_height = 20;
constexpr int text_threshold = 30;
Vector<Gfx::Color> s_colors;
static Vector<Gfx::Color> const& get_colors()
{
if (s_colors.is_empty()) {
// Start with a nice orange, then make shades of it
Gfx::Color midpoint(255, 94, 19);
s_colors.extend(midpoint.shades(3, 0.5f));
s_colors.append(midpoint);
s_colors.extend(midpoint.tints(3, 0.5f));
}
return s_colors;
}
FlameGraphView::FlameGraphView(GUI::Model& model, int text_column, int width_column)
: m_model(model)
, m_text_column(text_column)
, m_width_column(width_column)
{
set_fill_with_background_color(true);
set_background_role(Gfx::ColorRole::Base);
m_model.register_client(*this);
m_colors = get_colors();
layout_bars();
}
GUI::ModelIndex FlameGraphView::hovered_index() const
{
if (!m_hovered_bar)
return GUI::ModelIndex();
return m_hovered_bar->index;
}
void FlameGraphView::model_did_update(unsigned)
{
m_selected_indexes.clear();
layout_bars();
update();
}
void FlameGraphView::mousemove_event(GUI::MouseEvent& event)
{
StackBar* hovered_bar = nullptr;
for (size_t i = 0; i < m_bars.size(); ++i) {
auto& bar = m_bars[i];
if (bar.rect.contains(event.x(), event.y())) {
hovered_bar = &bar;
break;
}
}
if (m_hovered_bar == hovered_bar)
return;
m_hovered_bar = hovered_bar;
if (on_hover_change)
on_hover_change();
String label = "";
if (m_hovered_bar != nullptr && m_hovered_bar->index.is_valid()) {
label = bar_label(*m_hovered_bar);
}
set_tooltip(label);
show_or_hide_tooltip();
update();
}
void FlameGraphView::mousedown_event(GUI::MouseEvent& event)
{
if (event.button() != GUI::MouseButton::Primary)
return;
if (!m_hovered_bar)
return;
m_selected_indexes.clear();
GUI::ModelIndex selected_index = m_hovered_bar->index;
while (selected_index.is_valid()) {
m_selected_indexes.append(selected_index);
selected_index = selected_index.parent();
}
layout_bars();
update();
}
void FlameGraphView::resize_event(GUI::ResizeEvent&)
{
layout_bars();
}
void FlameGraphView::paint_event(GUI::PaintEvent& event)
{
GUI::Painter painter(*this);
painter.add_clip_rect(event.rect());
for (auto const& bar : m_bars) {
auto label = bar_label(bar);
auto color = m_colors[label.hash() % m_colors.size()];
if (&bar == m_hovered_bar)
color = color.lightened(1.2f);
if (bar.selected)
color = color.with_alpha(128);
// Do rounded corners if the node will draw with enough width
if (bar.rect.width() > (bar_rounding * 3))
painter.fill_rect_with_rounded_corners(bar.rect.shrunken(0, bar_margin), color, bar_rounding);
else
painter.fill_rect(bar.rect.shrunken(0, bar_margin), color);
if (bar.rect.width() > text_threshold) {
painter.draw_text(
bar.rect.shrunken(bar_padding, 0),
label,
painter.font(),
Gfx::TextAlignment::CenterLeft,
Gfx::Color::Black,
Gfx::TextElision::Right);
}
}
}
String FlameGraphView::bar_label(StackBar const& bar) const
{
auto label_index = bar.index.sibling_at_column(m_text_column);
String label = "All";
if (label_index.is_valid()) {
label = m_model.data(label_index).to_string();
}
return label;
}
void FlameGraphView::layout_bars()
{
m_bars.clear();
// Explicit copy here so the layout can mutate
Vector<GUI::ModelIndex> selected = m_selected_indexes;
GUI::ModelIndex null_index;
layout_children(null_index, 0, 0, this->width(), selected);
}
void FlameGraphView::layout_children(GUI::ModelIndex& index, int depth, int left, int right, Vector<GUI::ModelIndex>& selected_nodes)
{
auto available_width = right - left;
if (available_width < 1)
return;
auto y = this->height() - (bar_height * depth) - bar_height;
if (y < 0)
return;
u32 node_event_count = 0;
if (!index.is_valid()) {
// We're at the root, so calculate the event count across all roots
for (auto i = 0; i < m_model.row_count(index); ++i) {
auto const& root = *static_cast<ProfileNode const*>(m_model.index(i).internal_data());
node_event_count += root.event_count();
}
m_bars.append({ {}, { left, y, available_width, bar_height }, false });
} else {
auto const* node = static_cast<ProfileNode const*>(index.internal_data());
bool selected = !selected_nodes.is_empty();
if (selected) {
VERIFY(selected_nodes.take_last() == index);
}
node_event_count = node->event_count();
Gfx::IntRect node_rect { left, y, available_width, bar_height };
m_bars.append({ index, node_rect, selected });
}
float width_per_sample = static_cast<float>(available_width) / node_event_count;
float new_left = static_cast<float>(left);
for (auto i = 0; i < m_model.row_count(index); ++i) {
auto child_index = m_model.index(i, 0, index);
if (!child_index.is_valid())
continue;
if (!selected_nodes.is_empty()) {
if (selected_nodes.last() != child_index)
continue;
layout_children(child_index, depth + 1, left, right, selected_nodes);
return;
}
auto const* child = static_cast<ProfileNode const*>(child_index.internal_data());
float child_width = width_per_sample * child->event_count();
layout_children(child_index, depth + 1, static_cast<int>(new_left), static_cast<int>(new_left + child_width), selected_nodes);
new_left += child_width;
}
}
}
|
