source: git/src/aventreectrl.cc@ ed0410c1

//
//  aventreectrl.cc
//
//  Tree control used for the survey tree.
//
//  Copyright (C) 2001, Mark R. Shinwell.
//  Copyright (C) 2001-2003,2005,2006,2016,2018 Olly Betts
//  Copyright (C) 2005 Martin Green
//
//  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.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program; if not, write to the Free Software
//  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
//

#include <config.h>

#include "aventreectrl.h"
#include "mainfrm.h"
#include "osalloc.h"

#include <stack>

using namespace std;

// STATE_BLANK is used for stations which are siblings of surveys which have
// select checkboxes.
enum { STATE_BLANK = 0, STATE_OFF, STATE_ON };

/* XPM */
static const char *blank_xpm[] = {
/* columns rows colors chars-per-pixel */
"15 15 1 1",
"  c None",
/* pixels */
"               ",
"               ",
"               ",
"               ",
"               ",
"               ",
"               ",
"               ",
"               ",
"               ",
"               ",
"               ",
"               ",
"               ",
"               "
};

/* XPM */
static const char *off_xpm[] = {
/* columns rows colors chars-per-pixel */
"15 15 2 1",
". c #000000",
"  c None",
/* pixels */
"               ",
"               ",
" ............  ",
" .          .  ",
" .          .  ",
" .          .  ",
" .          .  ",
" .          .  ",
" .          .  ",
" .          .  ",
" .          .  ",
" .          .  ",
" .          .  ",
" ............  ",
"               "
};

/* XPM */
static const char *on_xpm[] = {
/* columns rows colors chars-per-pixel */
"15 15 3 1",
". c #000000",
"X c #007F28",
"  c None",
/* pixels */
"               ",
"               ",
" ............XX",
" .          XXX",
" .         XXXX",
" .        XXXX ",
" .       XXXX  ",
" .      XXXX.  ",
" . XX  XXXX .  ",
" . XXXXXXX  .  ",
" .  XXXXX   .  ",
" .   XXX    .  ",
" .    X     .  ",
" ............  ",
"               "
};

BEGIN_EVENT_TABLE(AvenTreeCtrl, wxTreeCtrl)
    EVT_MOTION(AvenTreeCtrl::OnMouseMove)
    EVT_LEAVE_WINDOW(AvenTreeCtrl::OnLeaveWindow)
    EVT_TREE_SEL_CHANGED(wxID_ANY, AvenTreeCtrl::OnSelChanged)
    EVT_TREE_ITEM_ACTIVATED(wxID_ANY, AvenTreeCtrl::OnItemActivated)
    EVT_CHAR(AvenTreeCtrl::OnKeyPress)
    EVT_TREE_ITEM_MENU(wxID_ANY, AvenTreeCtrl::OnMenu)
    EVT_MENU(menu_SURVEY_SHOW_ALL, AvenTreeCtrl::OnRestrict)
    EVT_MENU(menu_SURVEY_RESTRICT, AvenTreeCtrl::OnRestrict)
    EVT_MENU(menu_SURVEY_HIDE, AvenTreeCtrl::OnHide)
    EVT_MENU(menu_SURVEY_SHOW, AvenTreeCtrl::OnShow)
    EVT_MENU(menu_SURVEY_HIDE_SIBLINGS, AvenTreeCtrl::OnHideSiblings)
    EVT_TREE_STATE_IMAGE_CLICK(wxID_ANY, AvenTreeCtrl::OnStateClick)
END_EVENT_TABLE()

AvenTreeCtrl::AvenTreeCtrl(MainFrm* parent, wxWindow* window_parent) :
    wxTreeCtrl(window_parent, wxID_ANY, wxDefaultPosition, wxDefaultSize,
               wxTR_DEFAULT_STYLE | wxTR_HIDE_ROOT),
    m_Parent(parent),
    m_Enabled(false),
    m_LastItem(),
    m_BackgroundColour(),
    m_SelValid(false),
    menu_data(NULL)
{
    wxImageList* img_list = new wxImageList(15, 15, 2);
    img_list->Add(wxBitmap(blank_xpm));
    img_list->Add(wxBitmap(off_xpm));
    img_list->Add(wxBitmap(on_xpm));
    AssignStateImageList(img_list);
}

void AvenTreeCtrl::FillTree(const wxString& root_name)
{
    Freeze();
    m_Enabled = false;
    m_LastItem = wxTreeItemId();
    m_SelValid = false;
    DeleteAllItems();

    const wxChar separator = m_Parent->GetSeparator();
    filter.clear();
    filter.SetSeparator(separator);

    // Create the (hidden) real root of the wxTreeCtrl.
    wxTreeItemId treeroot = AddRoot(wxString());

    // Create the root of the survey tree.
    wxTreeItemId surveyroot = AppendItem(treeroot, root_name);

    // Fill the tree of stations and prefixes.
    stack<wxTreeItemId> previous_ids;
    wxString current_prefix;
    wxTreeItemId current_id = surveyroot;

    list<LabelInfo*>::const_iterator pos = m_Parent->GetLabels();
    while (pos != m_Parent->GetLabelsEnd()) {
        LabelInfo* label = *pos++;

        if (label->IsAnon()) continue;

        // Determine the current prefix.
        wxString prefix = label->GetText().BeforeLast(separator);

        // Determine if we're still on the same prefix.
        if (prefix == current_prefix) {
            // no need to fiddle with branches...
        }
        // If not, then see if we've descended to a new prefix.
        else if (prefix.length() > current_prefix.length() &&
                 prefix.StartsWith(current_prefix) &&
                 (prefix[current_prefix.length()] == separator ||
                  current_prefix.empty())) {
            // We have, so start as many new branches as required.
            int current_prefix_length = current_prefix.length();
            current_prefix = prefix;
            size_t next_dot = current_prefix_length;
            if (!next_dot) --next_dot;
            do {
                size_t prev_dot = next_dot + 1;

                // Extract the next bit of prefix.
                next_dot = prefix.find(separator, prev_dot + 1);

                wxString bit = prefix.substr(prev_dot, next_dot - prev_dot);
                // Sigh, therion can produce files with empty components in
                // station names!
                // assert(!bit.empty());

                // Add the current tree ID to the stack.
                previous_ids.push(current_id);

                // Append the new item to the tree and set this as the current branch.
                current_id = AppendItem(current_id, bit);
                SetItemData(current_id, new TreeData(prefix.substr(0, next_dot)));
            } while (next_dot != wxString::npos);
        }
        // Otherwise, we must have moved up, and possibly then down again.
        else {
            size_t count = 0;
            bool ascent_only = (prefix.length() < current_prefix.length() &&
                                current_prefix.StartsWith(prefix) &&
                                (current_prefix[prefix.length()] == separator ||
                                 prefix.empty()));
            if (!ascent_only) {
                // Find out how much of the current prefix and the new prefix
                // are the same.
                // Note that we require a match of a whole number of parts
                // between dots!
                size_t n = min(prefix.length(), current_prefix.length());
                size_t i;
                for (i = 0; i < n && prefix[i] == current_prefix[i]; ++i) {
                    if (prefix[i] == separator) count = i + 1;
                }
            } else {
                count = prefix.length() + 1;
            }

            // Extract the part of the current prefix after the bit (if any)
            // which has matched.
            // This gives the prefixes to ascend over.
            wxString prefixes_ascended = current_prefix.substr(count);

            // Count the number of prefixes to ascend over.
            int num_prefixes = prefixes_ascended.Freq(separator);

            // Reverse up over these prefixes.
            for (int i = 1; i <= num_prefixes; i++) {
                previous_ids.pop();
            }
            current_id = previous_ids.top();
            previous_ids.pop();

            if (!ascent_only) {
                // Add branches for this new part.
                size_t next_dot = count - 1;
                do {
                    size_t prev_dot = next_dot + 1;

                    // Extract the next bit of prefix.
                    next_dot = prefix.find(separator, prev_dot + 1);

                    wxString bit = prefix.substr(prev_dot, next_dot - prev_dot);
                    // Sigh, therion can produce files with empty components in
                    // station names!
                    // assert(!bit.empty());

                    // Add the current tree ID to the stack.
                    previous_ids.push(current_id);

                    // Append the new item to the tree and set this as the current branch.
                    current_id = AppendItem(current_id, bit);
                    SetItemData(current_id, new TreeData(prefix.substr(0, next_dot)));
                } while (next_dot != wxString::npos);
            }

            current_prefix = prefix;
        }

        // Now add the leaf.
        wxString bit = label->GetText().AfterLast(separator);
        // Sigh, therion can produce files with empty components in station
        // names!
        // assert(!bit.empty());
        wxTreeItemId id = AppendItem(current_id, bit);
        SetItemData(id, new TreeData(label));
        label->tree_id = id;
        // Set the colour for an item in the survey tree.
        if (label->IsEntrance()) {
            // Entrances are green (like entrance blobs).
            SetItemTextColour(id, wxColour(0, 255, 40));
        } else if (label->IsSurface()) {
            // Surface stations are dark green.
            SetItemTextColour(id, wxColour(49, 158, 79));
        }
    }

    Expand(surveyroot);
    m_Enabled = true;
    Thaw();
}

constexpr auto TREE_MASK = wxTREE_HITTEST_ONITEMLABEL |
                           wxTREE_HITTEST_ONITEMRIGHT |
                           wxTREE_HITTEST_ONITEMSTATEICON;

void AvenTreeCtrl::OnMouseMove(wxMouseEvent& event)
{
    if (!m_Enabled || m_Parent->Animating())
        return;

    int flags;
    wxTreeItemId pos = HitTest(event.GetPosition(), flags);
    if (!(flags & TREE_MASK)) {
        pos = wxTreeItemId();
    }
    if (pos == m_LastItem) return;
    if (pos.IsOk()) {
        const TreeData* data = static_cast<const TreeData*>(GetItemData(pos));
        m_Parent->DisplayTreeInfo(data);
        if (data && !data->IsStation()) {
            // For stations, MainFrm calls back to SetHere(), but for surveys
            // we need to do that ourselves.
            SetHere(pos);
        }
    } else {
        m_Parent->DisplayTreeInfo();
    }
}

void AvenTreeCtrl::SetHere(wxTreeItemId pos)
{
    if (pos == m_LastItem) return;

    if (m_LastItem.IsOk()) {
        SetItemBackgroundColour(m_LastItem, m_BackgroundColour);
    }
    if (pos.IsOk()) {
        m_BackgroundColour = GetItemBackgroundColour(pos);
        SetItemBackgroundColour(pos, wxColour(180, 180, 180));
    }
    m_LastItem = pos;
}

void AvenTreeCtrl::OnLeaveWindow(wxMouseEvent&)
{
    if (m_LastItem.IsOk()) {
        SetItemBackgroundColour(m_LastItem, m_BackgroundColour);
        m_LastItem = wxTreeItemId();
    }
    m_Parent->DisplayTreeInfo();
}

void AvenTreeCtrl::OnSelChanged(wxTreeEvent&)
{
    m_SelValid = true;
}

void AvenTreeCtrl::OnItemActivated(wxTreeEvent& e)
{
    if (!m_Enabled) return;

    m_Parent->TreeItemSelected(GetItemData(e.GetItem()));
}

void AvenTreeCtrl::OnMenu(wxTreeEvent& e)
{
    if (!m_Enabled) return;

    const TreeData* data = static_cast<const TreeData*>(GetItemData(e.GetItem()));
    menu_data = data;
    menu_item = e.GetItem();
    if (!data) {
        // Survey tree root:
        wxMenu menu;
        /* TRANSLATORS: In aven's survey tree, right-clicking on the root
         * gives a pop-up menu and this is an option (but only enabled if
         * the view is restricted to a subsurvey). It reloads the current
         * survey file with the who survey visible.
         */
        menu.Append(menu_SURVEY_SHOW_ALL, wmsg(/*Show all*/245));
        if (m_Parent->GetSurvey().empty())
            menu.Enable(menu_SURVEY_SHOW_ALL, false);
        PopupMenu(&menu);
    } else if (data->IsStation()) {
        // Station: name is data->GetLabel()->GetText()
    } else if (ItemHasChildren(menu_item)) {
        // Survey:
        wxMenu menu;
        /* TRANSLATORS: In aven's survey tree, right-clicking on a survey
         * name gives a pop-up menu and this is an option.  It reloads the
         * current survey file with the view restricted to the survey
         * clicked upon.
         */
        menu.Append(menu_SURVEY_RESTRICT, wmsg(/*Hide others*/246));
        menu.AppendSeparator();
        menu.Append(menu_SURVEY_HIDE, wmsg(/*&Hide*/407));
        menu.Append(menu_SURVEY_SHOW, wmsg(/*&Show*/409));
        menu.Append(menu_SURVEY_HIDE_SIBLINGS, wmsg(/*Hide si&blings*/388));
        switch (GetItemState(menu_item)) {
            case STATE_ON: // Currently shown.
                menu.Enable(menu_SURVEY_SHOW, false);
                break;
            case STATE_OFF:
                menu.Enable(menu_SURVEY_HIDE, false);
                break;
        }
        PopupMenu(&menu);
    } else {
        // Overlay - FIXME: menu here?
    }
    menu_data = NULL;
    e.Skip();
}

bool AvenTreeCtrl::GetSelectionData(wxTreeItemData** data) const
{
    assert(m_Enabled);
    assert(data);

    if (!m_SelValid) {
        return false;
    }

    wxTreeItemId id = GetSelection();
    if (id.IsOk()) {
        *data = GetItemData(id);
    }

    return id.IsOk() && *data;
}

void AvenTreeCtrl::UnselectAll()
{
    m_SelValid = false;
    wxTreeCtrl::UnselectAll();
}

void AvenTreeCtrl::OnKeyPress(wxKeyEvent &e)
{
    switch (e.GetKeyCode()) {
        case WXK_ESCAPE:
            m_Parent->ClearTreeSelection();
            break;
        case WXK_RETURN: {
            wxTreeItemId id = GetSelection();
            if (id.IsOk()) {
                if (ItemHasChildren(id)) {
                    // If on a branch, expand/contract it.
                    if (IsExpanded(id)) {
                        Collapse(id);
                    } else {
                        Expand(id);
                    }
                } else {
                    // If on a station, centre on it by selecting it twice.
                    m_Parent->TreeItemSelected(GetItemData(id));
                    m_Parent->TreeItemSelected(GetItemData(id));
                }
            }
            break;
        }
        case WXK_LEFT: case WXK_RIGHT: case WXK_UP: case WXK_DOWN:
        case WXK_HOME: case WXK_END: case WXK_PAGEUP: case WXK_PAGEDOWN:
            e.Skip();
            break;
        default:
            // Pass key event to MainFrm which will pass to GfxCore which will
            // pass to GUIControl.
            m_Parent->OnKeyPress(e);
            break;
    }
}

void AvenTreeCtrl::OnRestrict(wxCommandEvent&)
{
    m_Parent->RestrictTo(menu_data && menu_data->IsSurvey() ? menu_data->GetSurvey() : wxString());
    // FIXME: Overlays
}

void AvenTreeCtrl::OnHide(wxCommandEvent&)
{
    // Shouldn't be available for the root item.
    wxASSERT(menu_data);
    // Hide should be disabled unless the item is explicitly shown.
    wxASSERT(GetItemState(menu_item) == STATE_ON);
    SetItemState(menu_item, STATE_OFF);
    // FIXME: Overlays?
    filter.remove(menu_data->GetSurvey());
#if 0
    Freeze();
    // Show siblings if not already shown or hidden.
    wxTreeItemId i = menu_item;
    while ((i = GetPrevSibling(i)).IsOk()) {
        if (GetItemState(i) == wxTREE_ITEMSTATE_NONE)
            SetItemState(i, 1);
    }
    i = menu_item;
    while ((i = GetNextSibling(i)).IsOk()) {
        if (GetItemState(i) == wxTREE_ITEMSTATE_NONE)
            SetItemState(i, 1);
    }
    Thaw();
#endif
    m_Parent->ForceFullRedraw();
}

void AvenTreeCtrl::OnShow(wxCommandEvent&)
{
    // Shouldn't be available for the root item.
    wxASSERT(menu_data);
    auto old_state = GetItemState(menu_item);
    // Show should be disabled for an explicitly shown item.
    wxASSERT(old_state != STATE_ON);
    Freeze();
    SetItemState(menu_item, STATE_ON);
    // FIXME: Overlays?
    filter.add(menu_data->GetSurvey());
    if (old_state == wxTREE_ITEMSTATE_NONE) {
        // Hide siblings if not already shown or hidden.
        wxTreeItemId i = menu_item;
        while ((i = GetPrevSibling(i)).IsOk()) {
            if (GetItemState(i) == wxTREE_ITEMSTATE_NONE) {
                const TreeData* data = static_cast<const TreeData*>(GetItemData(i));
                SetItemState(i, data->IsStation() ? STATE_BLANK : STATE_OFF);
            }
        }
        i = menu_item;
        while ((i = GetNextSibling(i)).IsOk()) {
            if (GetItemState(i) == wxTREE_ITEMSTATE_NONE) {
                const TreeData* data = static_cast<const TreeData*>(GetItemData(i));
                SetItemState(i, data->IsStation() ? STATE_BLANK : STATE_OFF);
            }
        }
    }
    Thaw();
    m_Parent->ForceFullRedraw();
}

void AvenTreeCtrl::OnHideSiblings(wxCommandEvent&)
{
    // Shouldn't be available for the root item.
    wxASSERT(menu_data);
    Freeze();
    // FIXME: Overlays?
    SetItemState(menu_item, STATE_ON);
    filter.add(menu_data->GetSurvey());

    wxTreeItemId i = menu_item;
    while ((i = GetPrevSibling(i)).IsOk()) {
        const TreeData* data = static_cast<const TreeData*>(GetItemData(i));
        filter.remove(data->GetSurvey());
        SetItemState(i, data->IsStation() ? STATE_BLANK : STATE_OFF);
    }
    i = menu_item;
    while ((i = GetNextSibling(i)).IsOk()) {
        const TreeData* data = static_cast<const TreeData*>(GetItemData(i));
        filter.remove(data->GetSurvey());
        SetItemState(i, data->IsStation() ? STATE_BLANK : STATE_OFF);
    }
    Thaw();
    m_Parent->ForceFullRedraw();
}

void AvenTreeCtrl::OnStateClick(wxTreeEvent& e)
{
    auto item = e.GetItem();
    const TreeData* data = static_cast<const TreeData*>(GetItemData(item));
    switch (GetItemState(item)) {
        case STATE_BLANK:
            // Click on blank state icon for a station - let the tree handle
            // this in the same way as a click on the label.
            return;
        case STATE_ON:
            if (!ItemHasChildren(item)) {
                // Overlay.
                m_Parent->InvalidateOverlays();
            } else {
                // Survey.
                if (data) filter.remove(data->GetSurvey());
            }
            SetItemState(item, STATE_OFF);
            break;
        case STATE_OFF:
            if (!ItemHasChildren(item)) {
                // Overlay.
                m_Parent->InvalidateOverlays();
            } else {
                // Survey.
                if (data) filter.add(data->GetSurvey());
            }
            SetItemState(item, STATE_ON);
            break;
    }
    e.Skip();
    m_Parent->ForceFullRedraw();
}

void AvenTreeCtrl::AddOverlay(const wxString& file)
{
    char* leaf = leaf_from_fnm(file.utf8_str());
    auto id = AppendItem(GetRootItem(), leaf);
    osfree(leaf);
    SetItemState(id, STATE_ON);
    SetItemData(id, new TreeData(file));
}

void AvenTreeCtrl::RemoveOverlay(const wxString& file)
{
    // If we add an overlay but fail to load it and remove it again, the
    // overlay will be the last one, so search from the last one back.
    for (auto item = GetLastChild(GetRootItem());
         item.IsOk();
         item = GetPrevSibling(item)) {
        if (ItemHasChildren(item)) {
            // Not an overlay.
            continue;
        }
        const TreeData* data = static_cast<const TreeData*>(GetItemData(item));
        if (data->GetSurvey() == file) {
            Delete(item);
            break;
        }
    }
}

wxTreeItemId AvenTreeCtrl::FirstOverlay()
{
    wxTreeItemIdValue cookie;
    auto item = GetFirstChild(GetRootItem(), cookie);
    while (item.IsOk() &&
           (ItemHasChildren(item) || GetItemState(item) != STATE_ON)) {
        item = GetNextSibling(item);
    }
    return item;
}

wxTreeItemId AvenTreeCtrl::NextOverlay(wxTreeItemId item)
{
    do {
        item = GetNextSibling(item);
    } while (item.IsOk() &&
             (ItemHasChildren(item) || GetItemState(item) != STATE_ON));
    return item;
}

wxTreeItemId AvenTreeCtrl::RemoveOverlay(wxTreeItemId id)
{
    wxTreeItemId item = NextOverlay(id);
    Delete(id);
    return item;
}

const wxString& AvenTreeCtrl::GetOverlayFilename(wxTreeItemId item)
{
    if (ItemHasChildren(item)) {
not_an_overlay:
        static const wxString empty_string;
        return empty_string;
    }

    const TreeData* data = static_cast<const TreeData*>(GetItemData(item));
    if (!data) goto not_an_overlay;
    return data->GetSurvey();
}