OSDGUI.cc

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#include "OSDGUI.hh"
#include "OSDWidget.hh"
#include "OSDRectangle.hh"
#include "OSDText.hh"
#include "Display.hh"
#include "CommandException.hh"
#include "TclObject.hh"
#include "StringOp.hh"
#include "memory.hh"
#include "outer.hh"
#include <algorithm>
#include <cassert>

using std::string;
using std::unique_ptr;
using std::vector;

namespace openmsx {

// class OSDGUI

OSDGUI::OSDGUI(CommandController& commandController, Display& display_)
        : display(display_)
        , osdCommand(commandController)
        , topWidget(*this)
{
}

void OSDGUI::refresh() const
{
        getDisplay().repaintDelayed(40000); // 25 fps
}


// class OSDCommand

OSDGUI::OSDCommand::OSDCommand(CommandController& commandController_)
        : Command(commandController_, "osd")
{
}

void OSDGUI::OSDCommand::execute(array_ref<TclObject> tokens, TclObject& result)
{
        if (tokens.size() < 2) {
                throw SyntaxError();
        }
        auto& gui = OUTER(OSDGUI, osdCommand);
        string_ref subCommand = tokens[1].getString();
        if (subCommand == "create") {
                create(tokens, result);
                gui.refresh();
        } else if (subCommand == "destroy") {
                destroy(tokens, result);
                gui.refresh();
        } else if (subCommand == "info") {
                info(tokens, result);
        } else if (subCommand == "exists") {
                exists(tokens, result);
        } else if (subCommand == "configure") {
                configure(tokens, result);
                gui.refresh();
        } else {
                throw CommandException(
                        "Invalid subcommand '" + subCommand + "', expected "
                        "'create', 'destroy', 'info', 'exists' or 'configure'.");
        }
}

void OSDGUI::OSDCommand::create(array_ref<TclObject> tokens, TclObject& result)
{
        if (tokens.size() < 4) {
                throw SyntaxError();
        }
        string_ref type = tokens[2].getString();
        auto& fullname = tokens[3];
        auto fullnameStr = fullname.getString();

        auto& gui = OUTER(OSDGUI, osdCommand);
        auto& top = gui.getTopWidget();
        if (top.findByName(fullnameStr)) {
                throw CommandException(
                        "There already exists a widget with this name: " +
                        fullnameStr);
        }

        string_ref parentname, childName;
        StringOp::splitOnLast(fullnameStr, '.', parentname, childName);
        auto* parent = childName.empty() ? &top : top.findByName(parentname);
        if (!parent) {
                throw CommandException(
                        "Parent widget doesn't exist yet:" + parentname);
        }

        auto widget = create(type, fullname);
        configure(*widget, tokens, 4);
        top.addName(*widget);
        parent->addWidget(std::move(widget));

        result = fullname;
}

unique_ptr<OSDWidget> OSDGUI::OSDCommand::create(
        string_ref type, const TclObject& newName) const
{
        auto& gui = OUTER(OSDGUI, osdCommand);
        if (type == "rectangle") {
                return make_unique<OSDRectangle>(gui, newName);
        } else if (type == "text") {
                return make_unique<OSDText>(gui, newName);
        } else {
                throw CommandException(
                        "Invalid widget type '" + type + "', expected "
                        "'rectangle' or 'text'.");
        }
}

void OSDGUI::OSDCommand::destroy(array_ref<TclObject> tokens, TclObject& result)
{
        if (tokens.size() != 3) {
                throw SyntaxError();
        }
        auto fullname = tokens[2].getString();

        auto& gui = OUTER(OSDGUI, osdCommand);
        auto& top = gui.getTopWidget();
        auto* widget = top.findByName(fullname);
        if (!widget) {
                // widget not found, not an error
                result.setBoolean(false);
                return;
        }

        auto* parent = widget->getParent();
        if (!parent) {
                throw CommandException("Can't destroy the top widget.");
        }

        top.removeName(*widget);
        parent->deleteWidget(*widget);
        result.setBoolean(true);
}

void OSDGUI::OSDCommand::info(array_ref<TclObject> tokens, TclObject& result)
{
        auto& gui = OUTER(OSDGUI, osdCommand);
        switch (tokens.size()) {
        case 2: {
                // list widget names
                result.addListElements(gui.getTopWidget().getAllWidgetNames());
                break;
        }
        case 3: {
                // list properties for given widget
                const auto& widget = getWidget(tokens[2].getString());
                result.addListElements(widget.getProperties());
                break;
        }
        case 4: {
                // get current value for given widget/property
                const auto& widget = getWidget(tokens[2].getString());
                widget.getProperty(tokens[3].getString(), result);
                break;
        }
        default:
                throw SyntaxError();
        }
}

void OSDGUI::OSDCommand::exists(array_ref<TclObject> tokens, TclObject& result)
{
        if (tokens.size() != 3) {
                throw SyntaxError();
        }
        auto& gui = OUTER(OSDGUI, osdCommand);
        auto* widget = gui.getTopWidget().findByName(tokens[2].getString());
        result.setBoolean(widget != nullptr);
}

void OSDGUI::OSDCommand::configure(array_ref<TclObject> tokens, TclObject& /*result*/)
{
        if (tokens.size() < 3) {
                throw SyntaxError();
        }
        configure(getWidget(tokens[2].getString()), tokens, 3);
}

void OSDGUI::OSDCommand::configure(OSDWidget& widget, array_ref<TclObject> tokens,
                                   unsigned skip)
{
        assert(tokens.size() >= skip);
        if ((tokens.size() - skip) & 1) {
                // odd number of extra arguments
                throw CommandException(
                        "Missing value for '" + tokens.back().getString() + "'.");
        }

        auto& interp = getInterpreter();
        for (size_t i = skip; i < tokens.size(); i += 2) {
                const auto& propName = tokens[i + 0].getString();
                widget.setProperty(interp, propName, tokens[i + 1]);
        }
}

string OSDGUI::OSDCommand::help(const vector<string>& tokens) const
{
        if (tokens.size() >= 2) {
                if (tokens[1] == "create") {
                        return
                          "osd create <type> <widget-path> [<property-name> <property-value>]...\n"
                          "\n"
                          "Creates a new OSD widget of given type. Path is a "
                          "hierarchical name for the widget (separated by '.'). "
                          "The parent widget for this new widget must already "
                          "exist.\n"
                          "Optionally you can set initial values for one or "
                          "more properties.\n"
                          "This command returns the path of the newly created "
                          "widget. This is path is again needed to configure "
                          "or to remove the widget. It may be useful to assign "
                          "this path to a variable.";
                } else if (tokens[1] == "destroy") {
                        return
                          "osd destroy <widget-path>\n"
                          "\n"
                          "Remove the specified OSD widget. Returns '1' on "
                          "success and '0' when widget couldn't be destroyed "
                          "because there was no widget with that name";
                } else if (tokens[1] == "info") {
                        return
                          "osd info [<widget-path> [<property-name>]]\n"
                          "\n"
                          "Query various information about the OSD status. "
                          "You can call this command with 0, 1 or 2 arguments.\n"
                          "Without any arguments, this command returns a list "
                          "of all existing widget IDs.\n"
                          "When a path is given as argument, this command "
                          "returns a list of available properties for that widget.\n"
                          "When both path and property name arguments are "
                          "given, this command returns the current value of "
                          "that property.";
                } else if (tokens[1] == "exists") {
                        return
                          "osd exists <widget-path>\n"
                          "\n"
                          "Test whether there exists a widget with given name. "
                          "This subcommand is meant to be used in scripts.";
                } else if (tokens[1] == "configure") {
                        return
                          "osd configure <widget-path> [<property-name> <property-value>]...\n"
                          "\n"
                          "Modify one or more properties on the given widget.";
                } else {
                        return "No such subcommand, see 'help osd'.";
                }
        } else {
                return
                  "Low level OSD GUI commands\n"
                  "  osd create <type> <widget-path> [<property-name> <property-value>]...\n"
                  "  osd destroy <widget-path>\n"
                  "  osd info [<widget-path> [<property-name>]]\n"
                  "  osd exists <widget-path>\n"
                  "  osd configure <widget-path> [<property-name> <property-value>]...\n"
                  "Use 'help osd <subcommand>' to see more info on a specific subcommand";
        }
}

void OSDGUI::OSDCommand::tabCompletion(vector<string>& tokens) const
{
        auto& gui = OUTER(OSDGUI, osdCommand);
        if (tokens.size() == 2) {
                static const char* const cmds[] = {
                        "create", "destroy", "info", "exists", "configure"
                };
                completeString(tokens, cmds);
        } else if ((tokens.size() == 3) && (tokens[1] == "create")) {
                static const char* const types[] = { "rectangle", "text" };
                completeString(tokens, types);
        } else if ((tokens.size() == 3) ||
                   ((tokens.size() == 4) && (tokens[1] == "create"))) {
                completeString(tokens, gui.getTopWidget().getAllWidgetNames());
        } else {
                try {
                        vector<string_ref> properties;
                        if (tokens[1] == "create") {
                                auto widget = create(tokens[2], TclObject());
                                properties = widget->getProperties();
                        } else if ((tokens[1] == "configure") ||
                                   (tokens[1] == "info")) {
                                const auto& widget = getWidget(tokens[2]);
                                properties = widget.getProperties();
                        }
                        completeString(tokens, properties);
                } catch (MSXException&) {
                        // ignore
                }
        }
}

OSDWidget& OSDGUI::OSDCommand::getWidget(string_ref widgetName) const
{
        auto& gui = OUTER(OSDGUI, osdCommand);
        auto* widget = gui.getTopWidget().findByName(widgetName);
        if (!widget) {
                throw CommandException("No widget with name " + widgetName);
        }
        return *widget;
}

} // namespace openmsx