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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "CommandSet.h"
#include "SkCanvas.h"
#include "SkTSort.h"
namespace sk_app {
static bool on_key_handler(Window::Key key, Window::InputState state, uint32_t modifiers,
void* userData) {
CommandSet* cs = reinterpret_cast<CommandSet*>(userData);
return cs->onKey(key, state, modifiers);
}
static bool on_char_handler(SkUnichar c, uint32_t modifiers, void* userData) {
CommandSet* cs = reinterpret_cast<CommandSet*>(userData);
return cs->onChar(c, modifiers);
}
CommandSet::CommandSet()
: fHelpMode(kNone_HelpMode) {
this->addCommand('h', "Overlays", "Show help screen", [this]() {
switch (this->fHelpMode) {
case kNone_HelpMode:
this->fHelpMode = kGrouped_HelpMode;
break;
case kGrouped_HelpMode:
this->fHelpMode = kAlphabetical_HelpMode;
break;
case kAlphabetical_HelpMode:
this->fHelpMode = kNone_HelpMode;
break;
}
fWindow->inval();
});
}
void CommandSet::attach(Window* window) {
fWindow = window;
window->registerKeyFunc(on_key_handler, this);
window->registerCharFunc(on_char_handler, this);
}
bool CommandSet::onKey(Window::Key key, Window::InputState state, uint32_t modifiers) {
if (Window::kDown_InputState == state) {
for (Command& cmd : fCommands) {
if (Command::kKey_CommandType == cmd.fType && key == cmd.fKey) {
cmd.fFunction();
return true;
}
}
}
return false;
}
bool CommandSet::onChar(SkUnichar c, uint32_t modifiers) {
for (Command& cmd : fCommands) {
if (Command::kChar_CommandType == cmd.fType && c == cmd.fChar) {
cmd.fFunction();
return true;
}
}
return false;
}
void CommandSet::addCommand(SkUnichar c, const char* group, const char* description,
std::function<void(void)> function) {
fCommands.push_back(Command(c, group, description, function));
}
void CommandSet::addCommand(Window::Key k, const char* keyName, const char* group,
const char* description, std::function<void(void)> function) {
fCommands.push_back(Command(k, keyName, group, description, function));
}
#if defined(SK_BUILD_FOR_WIN32)
#define SK_strcasecmp _stricmp
#else
#define SK_strcasecmp strcasecmp
#endif
bool CommandSet::compareCommandKey(const Command& first, const Command& second) {
return SK_strcasecmp(first.fKeyName.c_str(), second.fKeyName.c_str()) < 0;
}
bool CommandSet::compareCommandGroup(const Command& first, const Command& second) {
return SK_strcasecmp(first.fGroup.c_str(), second.fGroup.c_str()) < 0;
}
void CommandSet::drawHelp(SkCanvas* canvas) {
if (kNone_HelpMode == fHelpMode) {
return;
}
// Sort commands for current mode:
SkTQSort(fCommands.begin(), fCommands.end() - 1,
kAlphabetical_HelpMode == fHelpMode ? compareCommandKey : compareCommandGroup);
SkPaint bgPaint;
bgPaint.setColor(0xC0000000);
canvas->drawPaint(bgPaint);
SkPaint paint;
paint.setTextSize(16);
paint.setAntiAlias(true);
paint.setColor(0xFFFFFFFF);
SkPaint groupPaint;
groupPaint.setTextSize(18);
groupPaint.setUnderlineText(true);
groupPaint.setAntiAlias(true);
groupPaint.setColor(0xFFFFFFFF);
SkScalar x = SkIntToScalar(10);
SkScalar y = SkIntToScalar(10);
// Measure all key strings:
SkScalar keyWidth = 0;
for (Command& cmd : fCommands) {
keyWidth = SkMaxScalar(keyWidth,
paint.measureText(cmd.fKeyName.c_str(), cmd.fKeyName.size()));
}
keyWidth += paint.measureText(" ", 1);
// If we're grouping by category, we'll be adding text height on every new group (including the
// first), so no need to do that here. Otherwise, skip down so the first line is where we want.
if (kGrouped_HelpMode != fHelpMode) {
y += paint.getTextSize();
}
// Print everything:
SkString lastGroup;
for (Command& cmd : fCommands) {
if (kGrouped_HelpMode == fHelpMode && lastGroup != cmd.fGroup) {
// Group change. Advance and print header:
y += paint.getTextSize();
canvas->drawText(cmd.fGroup.c_str(), cmd.fGroup.size(), x, y, groupPaint);
y += groupPaint.getTextSize() + 2;
lastGroup = cmd.fGroup;
}
canvas->drawText(cmd.fKeyName.c_str(), cmd.fKeyName.size(), x, y, paint);
SkString text = SkStringPrintf(": %s", cmd.fDescription.c_str());
canvas->drawText(text.c_str(), text.size(), x + keyWidth, y, paint);
y += paint.getTextSize() + 2;
}
}
} // namespace sk_app
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