1 /*
2 * Copyright 2016 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "tools/sk_app/CommandSet.h"
9
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkFont.h"
12 #include "src/core/SkStringUtils.h"
13
14 namespace sk_app {
15
CommandSet()16 CommandSet::CommandSet()
17 : fHelpMode(kNone_HelpMode) {
18 this->addCommand('h', "Overlays", "Show help screen", [this]() {
19 switch (this->fHelpMode) {
20 case kNone_HelpMode:
21 this->fHelpMode = kGrouped_HelpMode;
22 break;
23 case kGrouped_HelpMode:
24 this->fHelpMode = kAlphabetical_HelpMode;
25 break;
26 case kAlphabetical_HelpMode:
27 this->fHelpMode = kNone_HelpMode;
28 break;
29 }
30 fWindow->inval();
31 });
32 }
33
attach(Window * window)34 void CommandSet::attach(Window* window) {
35 fWindow = window;
36 }
37
onKey(skui::Key key,skui::InputState state,skui::ModifierKey modifiers)38 bool CommandSet::onKey(skui::Key key, skui::InputState state, skui::ModifierKey modifiers) {
39 if (skui::InputState::kDown == state) {
40 for (Command& cmd : fCommands) {
41 if (Command::kKey_CommandType == cmd.fType && key == cmd.fKey) {
42 cmd.fFunction();
43 return true;
44 }
45 }
46 }
47
48 return false;
49 }
50
onChar(SkUnichar c,skui::ModifierKey modifiers)51 bool CommandSet::onChar(SkUnichar c, skui::ModifierKey modifiers) {
52 for (Command& cmd : fCommands) {
53 if (Command::kChar_CommandType == cmd.fType && c == cmd.fChar) {
54 cmd.fFunction();
55 return true;
56 }
57 }
58
59 return false;
60 }
61
onSoftkey(const SkString & softkey)62 bool CommandSet::onSoftkey(const SkString& softkey) {
63 for (const Command& cmd : fCommands) {
64 if (cmd.getSoftkeyString().equals(softkey)) {
65 cmd.fFunction();
66 return true;
67 }
68 }
69 return false;
70 }
71
addCommand(SkUnichar c,const char * group,const char * description,std::function<void (void)> function)72 void CommandSet::addCommand(SkUnichar c, const char* group, const char* description,
73 std::function<void(void)> function) {
74 fCommands.push_back(Command(c, group, description, function));
75 }
76
addCommand(skui::Key k,const char * keyName,const char * group,const char * description,std::function<void (void)> function)77 void CommandSet::addCommand(skui::Key k, const char* keyName, const char* group,
78 const char* description, std::function<void(void)> function) {
79 fCommands.push_back(Command(k, keyName, group, description, function));
80 }
81
compareCommandKey(const Command & first,const Command & second)82 bool CommandSet::compareCommandKey(const Command& first, const Command& second) {
83 return SK_strcasecmp(first.fKeyName.c_str(), second.fKeyName.c_str()) < 0;
84 }
85
compareCommandGroup(const Command & first,const Command & second)86 bool CommandSet::compareCommandGroup(const Command& first, const Command& second) {
87 return SK_strcasecmp(first.fGroup.c_str(), second.fGroup.c_str()) < 0;
88 }
89
drawHelp(SkCanvas * canvas)90 void CommandSet::drawHelp(SkCanvas* canvas) {
91 if (kNone_HelpMode == fHelpMode) {
92 return;
93 }
94
95 // Sort commands for current mode:
96 std::stable_sort(fCommands.begin(), fCommands.end(),
97 kAlphabetical_HelpMode == fHelpMode ? compareCommandKey : compareCommandGroup);
98
99 SkFont font;
100 font.setSize(16);
101
102 SkFont groupFont;
103 groupFont.setSize(18);
104
105 SkPaint bgPaint;
106 bgPaint.setColor(0xC0000000);
107 canvas->drawPaint(bgPaint);
108
109 SkPaint paint;
110 paint.setAntiAlias(true);
111 paint.setColor(0xFFFFFFFF);
112
113 SkPaint groupPaint;
114 groupPaint.setAntiAlias(true);
115 groupPaint.setColor(0xFFFFFFFF);
116
117 SkScalar x = SkIntToScalar(10);
118 SkScalar y = SkIntToScalar(10);
119
120 // Measure all key strings:
121 SkScalar keyWidth = 0;
122 for (Command& cmd : fCommands) {
123 keyWidth = std::max(keyWidth,
124 font.measureText(cmd.fKeyName.c_str(), cmd.fKeyName.size(),
125 SkTextEncoding::kUTF8));
126 }
127 keyWidth += font.measureText(" ", 1, SkTextEncoding::kUTF8);
128
129 // If we're grouping by category, we'll be adding text height on every new group (including the
130 // first), so no need to do that here. Otherwise, skip down so the first line is where we want.
131 if (kGrouped_HelpMode != fHelpMode) {
132 y += font.getSize();
133 }
134
135 // Print everything:
136 SkString lastGroup;
137 for (Command& cmd : fCommands) {
138 if (kGrouped_HelpMode == fHelpMode && lastGroup != cmd.fGroup) {
139 // Group change. Advance and print header:
140 y += font.getSize();
141 canvas->drawSimpleText(cmd.fGroup.c_str(), cmd.fGroup.size(), SkTextEncoding::kUTF8,
142 x, y, groupFont, groupPaint);
143 y += groupFont.getSize() + 2;
144 lastGroup = cmd.fGroup;
145 }
146
147 canvas->drawSimpleText(cmd.fKeyName.c_str(), cmd.fKeyName.size(), SkTextEncoding::kUTF8,
148 x, y, font, paint);
149 SkString text = SkStringPrintf(": %s", cmd.fDescription.c_str());
150 canvas->drawString(text, x + keyWidth, y, font, paint);
151 y += font.getSize() + 2;
152 }
153 }
154
getCommandsAsSoftkeys() const155 std::vector<SkString> CommandSet::getCommandsAsSoftkeys() const {
156 std::vector<SkString> result;
157 for(const Command& command : fCommands) {
158 result.push_back(command.getSoftkeyString());
159 }
160 return result;
161 }
162
163 } // namespace sk_app
164