1// Aseprite
2// Copyright (C) 2001-2017 David Capello
3//
4// This program is distributed under the terms of
5// the End-User License Agreement for Aseprite.
6
7#ifdef HAVE_CONFIG_H
8#include "config.h"
9#endif
10
11#include <string>
12
13#include "app/app.h"
14#include "app/commands/command.h"
15#include "app/commands/params.h"
16#include "app/i18n/strings.h"
17#include "app/modules/palettes.h"
18#include "app/ui/color_bar.h"
19#include "doc/palette.h"
20#include "fmt/format.h"
21
22namespace app {
23
24class ChangeColorCommand : public Command
25{
26 enum Change {
27 None,
28 IncrementIndex,
29 DecrementIndex,
30 };
31
32 /**
33 * True means "change background color", false the foreground color.
34 */
35 bool m_background;
36
37 Change m_change;
38
39public:
40 ChangeColorCommand();
41
42protected:
43 bool onNeedsParams() const override { return true; }
44 void onLoadParams(const Params& params) override;
45 void onExecute(Context* context) override;
46 std::string onGetFriendlyName() const override;
47};
48
49ChangeColorCommand::ChangeColorCommand()
50 : Command(CommandId::ChangeColor(), CmdUIOnlyFlag)
51{
52 m_background = false;
53 m_change = None;
54}
55
56void ChangeColorCommand::onLoadParams(const Params& params)
57{
58 std::string target = params.get("target");
59 if (target == "foreground") m_background = false;
60 else if (target == "background") m_background = true;
61
62 std::string change = params.get("change");
63 if (change == "increment-index") m_change = IncrementIndex;
64 else if (change == "decrement-index") m_change = DecrementIndex;
65}
66
67void ChangeColorCommand::onExecute(Context* context)
68{
69 ColorBar* colorbar = ColorBar::instance();
70 app::Color color = m_background ? colorbar->getBgColor():
71 colorbar->getFgColor();
72
73 switch (m_change) {
74 case None:
75 // do nothing
76 break;
77 case IncrementIndex: {
78 const int palSize = get_current_palette()->size();
79 if (palSize >= 1) {
80 // Seems safe to assume getIndex() will return a
81 // positive number, so use truncation modulo.
82 color = app::Color::fromIndex((color.getIndex() + 1) % palSize);
83 }
84 break;
85 }
86 case DecrementIndex: {
87 const int palSize = get_current_palette()->size();
88 if (palSize >= 1) {
89 // Floor modulo.
90 color = app::Color::fromIndex(((color.getIndex() - 1) % palSize + palSize) % palSize);
91 }
92 break;
93 }
94 }
95
96 if (m_background)
97 colorbar->setBgColor(color);
98 else
99 colorbar->setFgColor(color);
100}
101
102std::string ChangeColorCommand::onGetFriendlyName() const
103{
104 std::string action;
105
106 switch (m_change) {
107 case None:
108 break;
109 case IncrementIndex:
110 if (m_background)
111 action = Strings::commands_ChangeColor_IncrementBgIndex();
112 else
113 action = Strings::commands_ChangeColor_IncrementFgIndex();
114 break;
115 case DecrementIndex:
116 if (m_background)
117 action = Strings::commands_ChangeColor_DecrementBgIndex();
118 else
119 action = Strings::commands_ChangeColor_DecrementFgIndex();
120 break;
121 }
122
123 return fmt::format(getBaseFriendlyName(), action);
124}
125
126Command* CommandFactory::createChangeColorCommand()
127{
128 return new ChangeColorCommand;
129}
130
131} // namespace app
132