/**********************************************************************
 
 Audacity: A Digital Audio Editor
 
 TimeToolBar.cpp
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.
 
 *//*******************************************************************/



// For compilers that support precompilation, includes "wx/wx.h".
#include <wx/wxprec.h>

#include <wx/setup.h> // for wxUSE_* macros

#ifndef WX_PRECOMP
#include <wx/intl.h>
#include <wx/sizer.h>
#endif

#include "TimeToolBar.h"
#include "SelectionBarListener.h"
#include "ToolManager.h"

#include "../AudioIO.h"
#include "../Project.h"
#include "../ProjectAudioIO.h"
#include "../ProjectSettings.h"
#include "../ViewInfo.h"

IMPLEMENT_CLASS(TimeToolBar, ToolBar);

// Having a fixed ID for the Audio Position is helpful for
// the Jaws screen reader script for Audacity.
enum {
   TimeBarFirstID = 2800,
   AudioPositionID
};

BEGIN_EVENT_TABLE(TimeToolBar, ToolBar)
   EVT_COMMAND(AudioPositionID, EVT_TIMETEXTCTRL_UPDATED, TimeToolBar::OnUpdate)
   EVT_SIZE(TimeToolBar::OnSize)
   EVT_IDLE(TimeToolBar::OnIdle)
END_EVENT_TABLE()

TimeToolBar::TimeToolBar(AudacityProject &project)
:  ToolBar(project, TimeBarID, XO("Time"), wxT("Time"), true),
   mListener(NULL),
   mAudioTime(NULL)
{
   project.Bind(EVT_PROJECT_SETTINGS_CHANGE, &TimeToolBar::OnSettingsChanged, this);
}

TimeToolBar::~TimeToolBar()
{
}

TimeToolBar &TimeToolBar::Get(AudacityProject &project)
{
   auto &toolManager = ToolManager::Get(project);
   return *static_cast<TimeToolBar*>(toolManager.GetToolBar(TimeBarID));
}

const TimeToolBar &TimeToolBar::Get(const AudacityProject &project)
{
   return Get(const_cast<AudacityProject&>(project)) ;
}

void TimeToolBar::Populate()
{
   const auto &settings = ProjectSettings::Get(mProject);

   // Get the default sample rate
   auto rate = settings.GetRate();

   // Get the default time format
   auto format = settings.GetAudioTimeFormat();

   // Create the read-only time control
   mAudioTime = safenew NumericTextCtrl(this, AudioPositionID, NumericConverter::TIME, format, 0.0, rate);
   mAudioTime->SetName(XO("Audio Position"));
   mAudioTime->SetReadOnly(true);

   // Add it to the toolbar
   Add(mAudioTime, 0, wxALIGN_CENTER, 0);

   // Calculate the width to height ratio
   wxSize digitSize = mAudioTime->GetDigitSize();
   mDigitRatio = (float)digitSize.x / digitSize.y;

   // During initialization, we need to bypass some resizing to prevent the "best size"
   // from being used as we want to ensure the saved size is used instead. See SetDocked()
   // and OnUpdate() for more info.
   mSettingInitialSize = true;

   // Establish initial resizing limits
//   SetResizingLimits();
}

void TimeToolBar::UpdatePrefs()
{
   // Since the language may have changed, we need to force an update to accommodate
   // different length text
   wxCommandEvent e;
   e.SetInt(mAudioTime->GetFormatIndex());
   OnUpdate(e);

   // Language may have changed so reset label
   SetLabel(XO("Time"));

   // Give the toolbar a chance
   ToolBar::UpdatePrefs();
}

void TimeToolBar::SetToDefaultSize()
{
   // Reset 
   SetMaxSize(wxDefaultSize);
   SetMinSize(wxDefaultSize);

   // Set the default time format
   SetAudioTimeFormat(NumericConverter::HoursMinsSecondsFormat());

   // Set the default size
   SetSize(GetInitialWidth(), 48);

   // Inform others the toobar has changed
   Updated();
}

wxSize TimeToolBar::GetDockedSize()
{
   wxSize sz = GetSize();

   // Anything less than a single height bar becomes single height
   if (sz.y <= toolbarSingle) {
      sz.y = toolbarSingle;
   }
   // Otherwise it will be a double height bar
   else {
      sz.y = 2 * toolbarSingle + toolbarGap;
   }

   return sz;
}

void TimeToolBar::SetDocked(ToolDock *dock, bool pushed)
{
   // It's important to call this FIRST since it unhides the resizer control.
   // Not doing so causes the calculated best size to be off by the width
   // of the resizer.
   ToolBar::SetDocked(dock, pushed);

   // Recalculate the min and max limits
   SetResizingLimits();

   // When moving from floater to dock, fit to toolbar since the resizer will
   // be mispositioned
   if (dock) {
      // During initialization, the desired size is already set, so do not
      // override it with the "best size". See OnUpdate for further info.
      if (!mSettingInitialSize) {
         // Fit() while retaining height
         SetSize(GetBestSize().x, GetSize().y);

         // Inform others the toolbar has changed
         Updated();
      }
   }
}

void TimeToolBar::SetListener(TimeToolBarListener *l)
{
   // Remember the listener
   mListener = l;

   // Get (and set) the saved time format
   SetAudioTimeFormat(mListener->TT_GetAudioTimeFormat());

   // During initialization, if the saved format is the same as the default,
   // OnUpdate() will not be called and need it to set the initial size.
   if (mSettingInitialSize) {
      wxCommandEvent e;
      e.SetInt(mAudioTime->GetFormatIndex());
      OnUpdate(e);
   }
}

void TimeToolBar::SetAudioTimeFormat(const NumericFormatSymbol & format)
{
   // Set the format if it's different from previous
   if (mAudioTime->SetFormatString(mAudioTime->GetBuiltinFormat(format))) {
      // Simulate an update since the format has changed.
      wxCommandEvent e;
      e.SetInt(mAudioTime->GetFormatIndex());
      OnUpdate(e);
   }
}

// The intention of this is to get the resize handle in the
// correct position, after we've let go in dragging.
void TimeToolBar::ResizingDone()
{
   // Fit() while retaining height
   SetSize(GetBestSize().x, GetSize().y);

   // Inform others the toobar has changed
   Updated();
}

void TimeToolBar::SetResizingLimits()
{
   // Reset limits
   SetMinSize(wxDefaultSize);
   SetMaxSize(wxDefaultSize);

   // If docked we use the current bar height since it's always a single or double height
   // toolbar.  For floaters, single height toolbar is the minimum height.
   int minH = IsDocked() ? GetSize().y : toolbarSingle;

   // Get the content size given the smallest digit height we allow
   wxSize minSize = ComputeSizing(minDigitH);

   // Account for any borders added by the window manager
   minSize.x += (mAudioTime->GetSize().x - mAudioTime->GetClientSize().x);

   // Calculate the space used by other controls and sizer borders with this toolbar
   wxSize outer = (GetSize() - GetSizer()->GetSize());

   // And account for them in the width
   minSize.x += outer.x;

   // Override the height
   minSize.y = minH;

   // Get the maximum digit height we can use. This is restricted to the toolbar's
   // current height minus any control borders
   int digH = minH - (mAudioTime->GetSize().y - mAudioTime->GetClientSize().y);

   // Get the content size using the digit height, if docked. Otherwise use the
   // maximum digit height we allow.
   wxSize maxSize = ComputeSizing(IsDocked() ? digH : maxDigitH);

   // Account for the other controls and sizer borders within this toolbar
   maxSize.x += outer.x;

   // Account for any borders added by the window manager and +1 to keep toolbar
   // from dropping to next smaller size when grabbing the resizer.
   maxSize.x += (mAudioTime->GetSize().x - mAudioTime->GetClientSize().x) + 1;

   // Override the height
   maxSize.y = IsDocked() ? minH : wxDefaultCoord;

   // And finally set them both
   SetMinSize(minSize);
   SetMaxSize(maxSize);
}

// Called when the project settings change
void TimeToolBar::OnSettingsChanged(wxCommandEvent &evt)
{
   evt.Skip(false);

   if (evt.GetInt() == ProjectSettings::ChangedProjectRate && mAudioTime)
   {
      const auto &settings = ProjectSettings::Get(mProject);
      mAudioTime->SetSampleRate(settings.GetRate());
   }
}

// Called when the format drop downs is changed.
// This causes recreation of the toolbar contents.
void TimeToolBar::OnUpdate(wxCommandEvent &evt)
{
   evt.Skip(false);

   // Reset to allow resizing to work
   SetMinSize(wxDefaultSize);
   SetMaxSize(wxDefaultSize);

   // Save format name before recreating the controls so they resize properly
   if (mListener) {
      mListener->TT_SetAudioTimeFormat(mAudioTime->GetBuiltinName(evt.GetInt()));
   }

   // During initialization, the desired size will have already been set at this point
   // and the "best" size" would override it, so we simply send a size event to force
   // the content to fit inside the toolbar.
   if (mSettingInitialSize) {
      mSettingInitialSize = false;
      SendSizeEvent();
   }
   // Otherwise we want the toolbar to resize to fit around the content
   else {
      // Fit() while retaining height
      SetSize(GetBestSize().x, GetSize().y);
   }

   // Go set the new size limits
   SetResizingLimits();

   // Inform others the toobar has changed
   Updated();
}

void TimeToolBar::OnSize(wxSizeEvent &evt)
{
   evt.Skip();

   // Can fire before we're ready
   if (!mAudioTime) {
      return;
   }

   // Make sure everything is where it's supposed to be
   Layout();

   // Get the sizer's size and remove any borders the time control might have.
   wxSize sizerBR = GetSizer()->GetSize() - (mAudioTime->GetSize() - mAudioTime->GetClientSize());

   // Get the content size of the time control. This can be different than the
   // control itself due to borders and sizer enduced changes.
   wxSize timeBR = mAudioTime->GetDimensions();

   // Get the current digit box height
   int h = mAudioTime->GetDigitSize().y;

   // Increase current size to find the best fit within the new size
   if (sizerBR.x >= timeBR.x && sizerBR.y >= timeBR.y) {
      do {
         h++;
         timeBR = ComputeSizing(h);
      } while (h < maxDigitH && sizerBR.x >= timeBR.x && sizerBR.y >= timeBR.y);
      h--;
   }
   // In all other cases, we need to decrease current size to fit within new size
   else if (sizerBR.x < timeBR.x || sizerBR.y < timeBR.y) {
      do {
         h--;
         timeBR = ComputeSizing(h);
      } while (h >= minDigitH && (sizerBR.x < timeBR.x || sizerBR.y < timeBR.y));
   }

   if (h != mAudioTime->GetDigitSize().y) {
      mAudioTime->SetDigitSize(h * mDigitRatio, h);
   }

   // Redraw the display immediately to smooth out resizing
   Update();
}

void TimeToolBar::OnIdle(wxIdleEvent &evt)
{
   evt.Skip();

   double audioTime;

   auto &projectAudioIO = ProjectAudioIO::Get(mProject);
   if (projectAudioIO.IsAudioActive()) {
      auto gAudioIO = AudioIO::Get();
      audioTime = gAudioIO->GetStreamTime();
   }
   else {
      const auto &playRegion = ViewInfo::Get(mProject).playRegion;
      audioTime = playRegion.GetStart();
   }

   mAudioTime->SetValue(wxMax(0.0, audioTime));
}

static RegisteredToolbarFactory factory
{
   TimeBarID,
   []( AudacityProject &project )
   {
      return ToolBar::Holder{ safenew TimeToolBar{ project } };
   }
};

namespace {
AttachedToolBarMenuItem sAttachment
{
   TimeBarID,
   wxT("ShowTimeTB"),
   /* i18n-hint: Clicking this menu item shows the toolbar
      for viewing actual time of the cursor */
   XXO("&Time Toolbar"),
   {
      Registry::OrderingHint::After,
      "ShowSelectionTB"
   }
};
}