/*
 *  This file is part of RawTherapee.
 *
 *  Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
 *
 *  RawTherapee 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  RawTherapee 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 RawTherapee.  If not, see <https://www.gnu.org/licenses/>.
 */
#include "thumbbrowserentrybase.h"

#include "options.h"
#include "thumbbrowserbase.h"
#include "rtengine/rt_math.h"
#include "rtsurface.h"

namespace
{

Glib::ustring getPaddedName(const Glib::ustring& name)
{
    enum class State {
        OTHER,
        NUMBER
    };

    constexpr unsigned int pad_width = 16;

    Glib::ustring res;

    State state = State::OTHER;
    Glib::ustring number;

    for (auto c : name) {
        switch (state) {
            case State::OTHER: {
                switch (c) {
                    case '0':
                    case '1':
                    case '2':
                    case '3':
                    case '4':
                    case '5':
                    case '6':
                    case '7':
                    case '8':
                    case '9': {
                        number += c;

                        state = State::NUMBER;
                        break;
                    }

                    default: {
                        res += c;
                        break;
                    }
                }
                break;
            }

            case State::NUMBER: {
                switch (c) {
                    case '0':
                    case '1':
                    case '2':
                    case '3':
                    case '4':
                    case '5':
                    case '6':
                    case '7':
                    case '8':
                    case '9': {
                        number += c;
                        break;
                    }

                    default: {
                        if (number.size() < pad_width) {
                            res.append(pad_width - number.size(), '0');
                        }
                        res += number;
                        res += c;
                        number.clear();

                        state = State::OTHER;
                        break;
                    }
                }
                break;
            }
        }
    }

    switch (state) {
        case State::OTHER: {
            break;
        }

        case State::NUMBER: {
            if (number.size() < pad_width) {
                res.append(pad_width - number.size(), '0');
            }
            res += number;
            break;
        }
    }

    return res;
}

}

ThumbBrowserEntryBase::ThumbBrowserEntryBase (const Glib::ustring& fname, Thumbnail *thm) :
    fnlabw(0),
    fnlabh(0),
    dtlabw(0),
    dtlabh(0),
    exlabw(0),
    exlabh(0),
    prew(0),
    preh(0),
    prex(0),
    prey(0),
    upperMargin(6),
    borderWidth(1),
    textGap(6),
    sideMargin(8),
    lowerMargin(8),
    dispname(Glib::path_get_basename(fname)),
    buttonSet(nullptr),
    width(0),
    height(0),
    exp_width(0),
    exp_height(0),
    startx(0),
    starty(0),
    ofsX(0),
    ofsY(0),
    redrawRequests(0),
    parent(nullptr),
    original(nullptr),
    bbSelected(false),
    bbFramed(false),
    bbPreview(nullptr),
    cursor_type(CSUndefined),
    collate_name(getPaddedName(dispname).casefold_collate_key()),
    collate_exif(getPaddedName(thm->getExifString()).casefold_collate_key()),
    thumbnail(thm),
    filename(fname),
    selected(false),
    drawable(false),
    filtered(false),
    framed(false),
    processing(false),
    italicstyle(false),
    edited(false),
    recentlysaved(false),
    updatepriority(false),
    withFilename(WFNAME_NONE)
{
}

ThumbBrowserEntryBase::~ThumbBrowserEntryBase ()
{
    delete buttonSet;
}

void ThumbBrowserEntryBase::addButtonSet (LWButtonSet* bs)
{
    buttonSet = bs;
}

void ThumbBrowserEntryBase::updateBackBuffer ()
{

    if (!parent) {
        return;
    }

    Gtk::Widget* w = parent->getDrawingArea ();

    if (backBuffer && (backBuffer->getWidth() != exp_width || backBuffer->getHeight() != exp_height )) {
        // deleting the existing BackBuffer
        backBuffer.reset();
    }
    if (!backBuffer) {
        backBuffer = Glib::RefPtr<BackBuffer>(new BackBuffer(exp_width, exp_height));
    }

    // If thumbnail is hidden by a filter, drawing to it will crash
    // if either with or height is zero then return early
    if (!backBuffer->getWidth() || !backBuffer->getHeight()) {
        return;
    }

    Cairo::RefPtr<Cairo::ImageSurface> surface = backBuffer->getSurface();

    bbSelected = selected;
    bbFramed = framed;
    bbPreview = preview.data();

    Cairo::RefPtr<Cairo::Context> cc = Cairo::Context::create(surface);

    Glib::RefPtr<Gtk::StyleContext> style = parent->getStyle();
    Gdk::RGBA textn = parent->getNormalTextColor();
    Gdk::RGBA texts = parent->getSelectedTextColor();
    Gdk::RGBA bgn = parent->getNormalBgColor();
    Gdk::RGBA bgs = parent->getSelectedBgColor();

    // clear area, draw frames and background
    style->render_background(cc, 0., 0., exp_width, exp_height);
    /*
    cc->set_line_width(0.);
    cc->set_line_cap(Cairo::LINE_CAP_BUTT);
    cc->set_antialias(Cairo::ANTIALIAS_NONE);
    cc->set_source_rgb(bgn.get_red(), bgn.get_green(), bgn.get_blue());
    cc->rectangle(0., 0., exp_width, exp_height);
    cc->fill();
    */

    cc->set_antialias(Cairo::ANTIALIAS_SUBPIXEL);

    drawFrame (cc, bgs, bgn);

    // calculate height of button set
    int bsHeight = 0;

    if (buttonSet) {
        int tmp;
        buttonSet->getAllocatedDimensions(tmp, bsHeight);
    }

    int infow, infoh;
    getTextSizes(infow, infoh);

    // draw preview frame
    //backBuffer->draw_rectangle (cc, false, (exp_width-prew)/2, upperMargin+bsHeight, prew+1, preh+1);
    // draw thumbnail image
    if (!preview.empty()) {
        prex = borderWidth + (exp_width - prew) / 2;
        const int hh = exp_height - (upperMargin + bsHeight + borderWidth + infoh + lowerMargin);
        prey = upperMargin + bsHeight + borderWidth + std::max((hh - preh) / 2, 0);
        backBuffer->copyRGBCharData(preview.data(), 0, 0, prew, preh, prew * 3, prex, prey);
    }

    customBackBufferUpdate (cc);

    // draw icons onto the thumbnail area
    bbIcons = getIconsOnImageArea ();
    bbSpecificityIcons = getSpecificityIconsOnImageArea ();

    int iofs_x = 4, iofs_y = 4;
    int istartx = prex;
    int istarty = prey;

    if ((parent->getLocation() != ThumbBrowserBase::THLOC_EDITOR && options.showFileNames && options.overlayedFileNames)
            || (parent->getLocation() == ThumbBrowserBase::THLOC_EDITOR && options.filmStripShowFileNames && options.filmStripOverlayedFileNames)) {
        cc->begin_new_path ();
        cc->rectangle (istartx, istarty, prew, fnlabh + dtlabh + exlabh + 2 * iofs_y);

        if ((texts.get_red() + texts.get_green() + texts.get_blue()) / 3 > 0.5) {
            cc->set_source_rgba (0, 0, 0, 0.5);
        } else {
            cc->set_source_rgba (1, 1, 1, 0.5);
        }

        cc->fill ();
    }

    istartx += iofs_x;
    istarty += iofs_y;

    if (!bbIcons.empty()) {
        int igap = 2;
        int iwidth = 0;
        int iheight = 0;

        for (size_t i = 0; i < bbIcons.size(); i++) {
            iwidth += bbIcons[i]->getWidth() + (i > 0 ? igap : 0);

            if (bbIcons[i]->getHeight() > iheight) {
                iheight = bbIcons[i]->getHeight();
            }
        }

        if ((parent->getLocation() != ThumbBrowserBase::THLOC_EDITOR && (!options.showFileNames || !options.overlayedFileNames))
                || (parent->getLocation() == ThumbBrowserBase::THLOC_EDITOR && (!options.filmStripShowFileNames || !options.filmStripOverlayedFileNames))) {
            // Draw the transparent black background around icons
            cc->begin_new_path ();
            cc->move_to(istartx - igap, istarty);
            cc->rel_line_to(igap, -igap);
            cc->rel_line_to(iwidth, 0);
            cc->rel_line_to(igap, igap);
            cc->rel_line_to(0, iheight);
            cc->rel_line_to(-igap, igap);
            cc->rel_line_to(-iwidth, 0);
            cc->rel_line_to(-igap, -igap);
            cc->rel_line_to(0, -iheight);
            cc->set_source_rgba (0, 0, 0, 0.6);
            cc->fill ();
        }

        for (size_t i = 0; i < bbIcons.size(); i++) {
            // Draw the image at 110, 90, except for the outermost 10 pixels.
            cc->set_source(bbIcons[i]->get(), istartx, istarty);
            cc->rectangle(istartx, istarty, bbIcons[i]->getWidth(), bbIcons[i]->getHeight());
            cc->fill();
            istartx += bbIcons[i]->getWidth() + igap;
        }
    }

    if (!bbSpecificityIcons.empty()) {
        int igap = 2;
        int istartx2 = prex + prew - 1 + igap;
        int istarty2 = prey + preh - igap - 1;

        for (size_t i = 0; i < bbSpecificityIcons.size(); ++i) {
            istartx2 -= bbSpecificityIcons[i]->getWidth() - igap;
            cc->set_source(bbSpecificityIcons[i]->get(), istartx2, istarty2 - bbSpecificityIcons[i]->getHeight());
            cc->rectangle(istartx2, istarty2 - bbSpecificityIcons[i]->getHeight(), bbSpecificityIcons[i]->getWidth(), bbSpecificityIcons[i]->getHeight());
            cc->fill();
        }
    }

    if ( ( (parent->getLocation() != ThumbBrowserBase::THLOC_EDITOR && options.showFileNames)
            || (parent->getLocation() == ThumbBrowserBase::THLOC_EDITOR && options.filmStripShowFileNames))
            && withFilename > WFNAME_NONE) {
        int textposx_fn, textposx_ex, textposx_dt, textposy, textw;

        if (! ((parent->getLocation() != ThumbBrowserBase::THLOC_EDITOR && options.overlayedFileNames)
                || (parent->getLocation() == ThumbBrowserBase::THLOC_EDITOR && options.filmStripOverlayedFileNames)) ) {
            textposx_fn = exp_width / 2 - fnlabw / 2;

            if (textposx_fn < 0) {
                textposx_fn = 0;
            }

            textposx_ex = exp_width / 2 - exlabw / 2;

            if (textposx_ex < 0) {
                textposx_ex = 0;
            }

            textposx_dt = exp_width / 2 - dtlabw / 2;

            if (textposx_dt < 0) {
                textposx_dt = 0;
            }

            textposy = exp_height - lowerMargin - infoh;
            textw = exp_width - 2 * textGap;

            if (selected) {
                cc->set_source_rgb(texts.get_red(), texts.get_green(), texts.get_blue());
            } else {
                cc->set_source_rgb(textn.get_red(), textn.get_green(), textn.get_blue());
            }
        } else {
            textposx_fn = istartx;
            textposx_ex = istartx;
            textposx_dt = istartx;
            textposy = istarty;
            textw = prew - (istartx - prex);
            cc->set_source_rgb(texts.get_red(), texts.get_green(), texts.get_blue());
        }

        // draw file name
        Glib::RefPtr<Pango::Context> context = w->get_pango_context () ;
        Pango::FontDescription fontd = w->get_style_context()->get_font();
        fontd.set_weight (Pango::WEIGHT_BOLD);

        if (italicstyle) {
            fontd.set_style (Pango::STYLE_ITALIC);
        } else {
            fontd.set_style (Pango::STYLE_NORMAL);
        }

        context->set_font_description (fontd);
        Glib::RefPtr<Pango::Layout> fn = w->create_pango_layout (dispname);
        fn->set_width (textw * Pango::SCALE);
        fn->set_ellipsize (Pango::ELLIPSIZE_MIDDLE);
        cc->move_to(textposx_fn, textposy);
        fn->add_to_cairo_context (cc);
        cc->fill();

        fontd.set_weight (Pango::WEIGHT_NORMAL);
        fontd.set_style (Pango::STYLE_NORMAL);
        context->set_font_description (fontd);

        if (withFilename == WFNAME_FULL) {
            // draw date/time label
            int tpos = fnlabh;

            if (options.fbShowDateTime && !datetimeline.empty()) {
                fn = w->create_pango_layout (datetimeline);
                fn->set_width (textw * Pango::SCALE);
                fn->set_ellipsize (Pango::ELLIPSIZE_MIDDLE);
                cc->move_to(textposx_dt, textposy + tpos);
                fn->add_to_cairo_context (cc);
                cc->fill();
                tpos += dtlabh;
            }

            // draw basic exif info
            if (options.fbShowBasicExif && !exifline.empty()) {
                fn = w->create_pango_layout (exifline);
                fn->set_width (textw * Pango::SCALE);
                fn->set_ellipsize (Pango::ELLIPSIZE_MIDDLE);
                cc->move_to(textposx_ex, textposy + tpos);
                fn->add_to_cairo_context (cc);
                cc->fill();
            }
        }
    }

    backBuffer->setDirty(false);
}

void ThumbBrowserEntryBase::getTextSizes (int& infow, int& infoh)
{

    if (!parent) {
        return;
    }

    Gtk::Widget* w = parent->getDrawingArea ();

    // calculate dimensions of the text based fields

    Glib::RefPtr<Pango::Context> context = w->get_pango_context () ;
    context->set_font_description (w->get_style_context()->get_font());


    // filename:
    Pango::FontDescription fontd = w->get_style_context()->get_font();
    fontd.set_weight (Pango::WEIGHT_BOLD);
    context->set_font_description (fontd);
    Glib::RefPtr<Pango::Layout> fn = w->create_pango_layout(dispname);
    fn->get_pixel_size (fnlabw, fnlabh);

    // calculate cumulated height of all info fields
    infoh = fnlabh;
    infow = 0;

    if (withFilename == WFNAME_FULL) {
        // datetime
        fontd.set_weight (Pango::WEIGHT_NORMAL);
        context->set_font_description (fontd);
        fn = w->create_pango_layout (datetimeline);
        fn->get_pixel_size (dtlabw, dtlabh);

        // basic exif data
        fn = w->create_pango_layout (exifline);
        fn->get_pixel_size (exlabw, exlabh);

        // add date/tile size:
        if (options.fbShowDateTime) {
            infoh += dtlabh;

            if (dtlabw + 2 * sideMargin > infow) {
                infow = dtlabw + 2 * sideMargin;
            }
        } else {
            dtlabw = dtlabh = 0;
        }

        if (options.fbShowBasicExif) {
            infoh += exlabh;

            if (exlabw + 2 * sideMargin > infow) {
                infow = exlabw + 2 * sideMargin;
            }
        } else {
            exlabw = exlabh = 0;
        }
    } else {
        dtlabw = dtlabh = exlabw = exlabh = 0;
    }
}

void ThumbBrowserEntryBase::resize (int h)
{
    MYWRITERLOCK(l, lockRW);

    height = h;
    int old_preh = preh;
    int old_prew = prew;

    // dimensions of the button set
    int bsw = 0, bsh = 0;

    if (buttonSet) {
        buttonSet->getMinimalDimensions (bsw, bsh);
    }

    if (parent->getLocation() == ThumbBrowserBase::THLOC_FILEBROWSER) {
        if (options.showFileNames) {
            withFilename = WFNAME_FULL;
        } else {
            withFilename = WFNAME_NONE;
        }
    } else if (parent->getLocation() == ThumbBrowserBase::THLOC_BATCHQUEUE) {
        withFilename = WFNAME_REDUCED;
    } else {
        if (options.filmStripShowFileNames) {
            withFilename = WFNAME_REDUCED;
        } else {
            withFilename = WFNAME_NONE;
        }
    }

    // calculate the height remaining for the thumbnail image
    preh = height - upperMargin - 2 * borderWidth - lowerMargin - bsh;
    int infow = 0;
    int infoh = 0;

    if (    (parent->getLocation() != ThumbBrowserBase::THLOC_EDITOR && options.showFileNames && !options.overlayedFileNames)
            || (parent->getLocation() == ThumbBrowserBase::THLOC_EDITOR && options.filmStripShowFileNames && !options.filmStripOverlayedFileNames)) {
        // dimensions of the info text
        getTextSizes (infow, infoh);
        infoh += textGap;
        //preh -= infoh;
        height += infoh;
    }

    // Minimum size for thumbs
    if (preh < 24) {
        preh = 24;
        height = preh + (upperMargin + 2 * borderWidth + lowerMargin) + bsh + infoh;
    }

    calcThumbnailSize ();  // recalculates prew

    width = prew + 2 * sideMargin + 2 * borderWidth;

    if (    (parent->getLocation() != ThumbBrowserBase::THLOC_EDITOR && options.showFileNames && !options.overlayedFileNames)
            || (parent->getLocation() == ThumbBrowserBase::THLOC_EDITOR && options.filmStripShowFileNames && !options.filmStripOverlayedFileNames)) {
        width = prew + 2 * sideMargin + 2 * borderWidth;

        if (width < infow + 2 * sideMargin + 2 * borderWidth) {
            width = infow + 2 * sideMargin + 2 * borderWidth;
        }
    }

    if (width < bsw + 2 * sideMargin + 2 * borderWidth) {
        width = bsw + 2 * sideMargin + 2 * borderWidth;
    }

    if (preh != old_preh || prew != old_prew) { // if new thumbnail height or new orientation
        preview.clear();
        refreshThumbnailImage ();
    } else if (backBuffer) {
        backBuffer->setDirty(true);    // This will force a backBuffer update on queue_draw
    }

    drawable = true;
}

void ThumbBrowserEntryBase::drawFrame (Cairo::RefPtr<Cairo::Context> cc, const Gdk::RGBA& bg, const Gdk::RGBA& fg)
{

    int radius = 4;

    if (selected || framed) {
        cc->move_to (radius, 0);
        cc->arc (exp_width - 1 - radius, radius, radius, -rtengine::RT_PI / 2, 0);
        cc->arc (exp_width - 1 - radius, exp_height - 1 - radius, radius, 0, rtengine::RT_PI / 2);
        cc->arc (radius, exp_height - 1 - radius, radius, rtengine::RT_PI / 2, rtengine::RT_PI);
        cc->arc (radius, radius, radius, rtengine::RT_PI, -rtengine::RT_PI / 2);
        cc->close_path ();

        if (selected) {
            cc->set_source_rgb (bg.get_red(), bg.get_green(), bg.get_blue());
            cc->fill_preserve ();
        }

        cc->set_source_rgb (bg.get_red() * 2 / 3, bg.get_green() * 2 / 3, bg.get_blue() * 2 / 3);
        cc->set_line_width (1.0);
        cc->stroke ();
    }

    if (framed) {
        cc->move_to (+2 + 0.5 + radius, +2 + 0.5);
        cc->arc (-2 + 0.5 + exp_width - 1 - radius, +2 + 0.5 + radius, radius, -rtengine::RT_PI / 2, 0);
        cc->arc (-2 + 0.5 + exp_width - 1 - radius, -2 + 0.5 + exp_height - 1 - radius, radius, 0, rtengine::RT_PI / 2);
        cc->arc (+2 + 0.5 + radius, -2 + exp_height - 1 - radius, radius, rtengine::RT_PI / 2, rtengine::RT_PI);
        cc->arc (+2 + 0.5 + radius, +2 + radius, radius, rtengine::RT_PI, -rtengine::RT_PI / 2);
        cc->close_path ();
        cc->set_source_rgb (fg.get_red(), fg.get_green(), fg.get_blue());
        cc->set_line_width (2.0);
        cc->stroke ();
    }
}

void ThumbBrowserEntryBase::draw (Cairo::RefPtr<Cairo::Context> cc)
{

    if (!drawable || !parent) {
        return;
    }

    MYREADERLOCK(l, lockRW);  // No resizes, position moves etc. inbetween

    int bbWidth, bbHeight;

    if (backBuffer) {
        bbWidth = backBuffer->getWidth();
        bbHeight = backBuffer->getHeight();
    }

    if (!backBuffer || selected != bbSelected || framed != bbFramed || preview.data() != bbPreview
            || exp_width != bbWidth || exp_height != bbHeight || getIconsOnImageArea () != bbIcons
            || getSpecificityIconsOnImageArea() != bbSpecificityIcons || backBuffer->isDirty())
    {
        updateBackBuffer ();
    }

    int w_ = startx + ofsX;
    int h_ = starty + ofsY;
    cc->set_source(backBuffer->getSurface(), w_, h_);
    cc->rectangle(w_, h_, backBuffer->getWidth(), backBuffer->getHeight());
    cc->fill();

    // check icon set changes!!!

//    drawProgressBar (window, cc, selected ? texts : textn, selected ? bgs : bgn, ofsX+startx, exp_width, ofsY+starty + upperMargin+bsHeight+borderWidth+preh+borderWidth+textGap+tpos, fnlabh);

    // redraw button set above the thumbnail
    if (buttonSet) {
        buttonSet->setColors (selected ? parent->getSelectedBgColor() : parent->getNormalBgColor(), selected ? parent->getNormalBgColor() : parent->getSelectedBgColor());
        buttonSet->redraw (cc);
    }
}

void ThumbBrowserEntryBase::setPosition (int x, int y, int w, int h)
{
    MYWRITERLOCK(l, lockRW);

    exp_width = w;
    exp_height = h;
    startx = x;
    starty = y;

    if (buttonSet) {
        buttonSet->arrangeButtons (ofsX + x + sideMargin, ofsY + y + upperMargin, w - 2 * sideMargin, -1);
    }
}

void ThumbBrowserEntryBase::setOffset (int x, int y)
{
    MYWRITERLOCK(l, lockRW);

    ofsX = -x;
    ofsY = -y;

    if (buttonSet) {
        buttonSet->move (ofsX + startx + sideMargin, ofsY + starty + upperMargin);
    }
}

bool ThumbBrowserEntryBase::inside (int x, int y) const
{

    return x > ofsX + startx && x < ofsX + startx + exp_width && y > ofsY + starty && y < ofsY + starty + exp_height;
}

rtengine::Coord2D ThumbBrowserEntryBase::getPosInImgSpace (int x, int y) const
{
    rtengine::Coord2D coord(-1., -1.);

    if (!preview.empty()) {
        x -= ofsX + startx;
        y -= ofsY + starty;

        if (x >= prex && x <= prex + prew && y >= prey && y <= prey + preh) {
            coord.x = double(x - prex) / double(prew);
            coord.y = double(y - prey) / double(preh);
        }
    }
    return coord;
}

bool ThumbBrowserEntryBase::insideWindow (int x, int y, int w, int h) const
{

    return !(ofsX + startx > x + w || ofsX + startx + exp_width < x || ofsY + starty > y + h || ofsY + starty + exp_height < y);
}

std::vector<std::shared_ptr<RTSurface>> ThumbBrowserEntryBase::getIconsOnImageArea()
{
    return std::vector<std::shared_ptr<RTSurface>>();
}

std::vector<std::shared_ptr<RTSurface>> ThumbBrowserEntryBase::getSpecificityIconsOnImageArea()
{
    return std::vector<std::shared_ptr<RTSurface>>();
}

bool ThumbBrowserEntryBase::motionNotify  (int x, int y)
{

    return buttonSet ? buttonSet->motionNotify (x, y) : false;
}

bool ThumbBrowserEntryBase::pressNotify   (int button, int type, int bstate, int x, int y)
{

    return buttonSet ? buttonSet->pressNotify (x, y) : false;
}

bool ThumbBrowserEntryBase::releaseNotify (int button, int type, int bstate, int x, int y)
{

    return buttonSet ? buttonSet->releaseNotify (x, y) : false;
}

std::tuple<Glib::ustring, bool> ThumbBrowserEntryBase::getToolTip (int x, int y) const
{
    Glib::ustring tooltip;

    if (buttonSet) {
        tooltip = buttonSet->getToolTip(x, y);
    }

    // Always show the filename in the tooltip since the filename in the thumbnail could be truncated.
    // If "Show Exif info" is disabled, also show Exif info in the tooltip.
    bool useMarkup = !tooltip.empty();
    if (inside(x, y) && tooltip.empty()) {
        tooltip = dispname;

        if (withFilename < WFNAME_FULL) {
            if (options.fbShowDateTime && !datetimeline.empty()) {
                tooltip += Glib::ustring("\n") + datetimeline;
            }

            if (options.fbShowBasicExif && !exifline.empty()) {
                tooltip += Glib::ustring("\n") + exifline;
            }
        }
    }

    return std::make_tuple(std::move(tooltip), useMarkup);
}