/* Copyright 2020 Jaakko Keränen <jaakko.keranen@iki.fi>

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */

#include "sidebarwidget.h"

#include "app.h"
#include "bookmarks.h"
#include "command.h"
#include "documentwidget.h"
#include "gmcerts.h"
#include "gmdocument.h"
#include "inputwidget.h"
#include "labelwidget.h"
#include "listwidget.h"
#include "paint.h"
#include "scrollwidget.h"
#include "util.h"
#include "visited.h"

#include <the_Foundation/intset.h>
#include <the_Foundation/stringarray.h>
#include <SDL_clipboard.h>
#include <SDL_mouse.h>

iDeclareType(SidebarItem)
typedef iListItemClass iSidebarItemClass;

struct Impl_SidebarItem {
    iListItem listItem;
    uint32_t  id;
    int       indent;
    iChar     icon;
    iString   label;
    iString   meta;
    iString   url;
};

void init_SidebarItem(iSidebarItem *d) {
    init_ListItem(&d->listItem);
    d->id     = 0;
    d->indent = 0;
    d->icon   = 0;
    init_String(&d->label);
    init_String(&d->meta);
    init_String(&d->url);
}

void deinit_SidebarItem(iSidebarItem *d) {
    deinit_String(&d->url);
    deinit_String(&d->meta);
    deinit_String(&d->label);
}

static void draw_SidebarItem_(const iSidebarItem *d, iPaint *p, iRect itemRect, const iListWidget *list);

iBeginDefineSubclass(SidebarItem, ListItem)
    .draw = (iAny *) draw_SidebarItem_,
iEndDefineSubclass(SidebarItem)

iDefineObjectConstruction(SidebarItem)

/*----------------------------------------------------------------------------------------------*/

struct Impl_SidebarWidget {
    iWidget widget;
    enum iSidebarMode mode;
    iListWidget *list;
    int modeScroll[max_SidebarMode];
    int width;
    iLabelWidget *modeButtons[max_SidebarMode];
    int itemHeight;
    int maxButtonLabelWidth;
    iWidget *resizer;
    SDL_Cursor *resizeCursor;
    iWidget *menu;
};

iDefineObjectConstruction(SidebarWidget)

static iBool isResizing_SidebarWidget_(const iSidebarWidget *d) {
    return (flags_Widget(d->resizer) & pressed_WidgetFlag) != 0;
}

static int cmpTitle_Bookmark_(const iBookmark **a, const iBookmark **b) {
    return cmpStringCase_String(&(*a)->title, &(*b)->title);
}

static void updateVisible_SidebarWidget_(iSidebarWidget *d) {
    updateVisible_ListWidget(d->list);
}

static void updateItems_SidebarWidget_(iSidebarWidget *d) {
    clear_ListWidget(d->list);
    destroy_Widget(d->menu);
    d->menu = NULL;
    switch (d->mode) {
        case documentOutline_SidebarMode: {
            const iGmDocument *doc = document_DocumentWidget(document_App());
            iConstForEach(Array, i, headings_GmDocument(doc)) {
                const iGmHeading *head = i.value;
                iSidebarItem *item = new_SidebarItem();
                item->id = index_ArrayConstIterator(&i);
                setRange_String(&item->label, head->text);
                item->indent = head->level * 4 * gap_UI;
                addItem_ListWidget(d->list, item);
                iRelease(item);
            }
            break;
        }
        case bookmarks_SidebarMode: {
            iConstForEach(PtrArray, i, list_Bookmarks(bookmarks_App(), NULL, cmpTitle_Bookmark_)) {
                const iBookmark *bm = i.ptr;
                iSidebarItem *item = new_SidebarItem();
                item->id = id_Bookmark(bm);
                item->icon = bm->icon;
                set_String(&item->url, &bm->url);
                set_String(&item->label, &bm->title);
                set_String(&item->meta, &bm->tags);
                addItem_ListWidget(d->list, item);
                iRelease(item);
            }
            d->menu = makeMenu_Widget(
                as_Widget(d),
                (iMenuItem[]){ { "Edit Bookmark...", 0, 0, "bookmark.edit" },
                               { "Copy URL", 0, 0, "bookmark.copy" },
                               { "---", 0, 0, NULL },
                               { uiTextCaution_ColorEscape "Delete Bookmark", 0, 0, "bookmark.delete" } },
                4);
            break;
        }
        case history_SidebarMode: {
            iDate on;
            initCurrent_Date(&on);
            const int thisYear = on.year;
            iConstForEach(PtrArray, i, list_Visited(visited_App(), 200)) {
                const iVisitedUrl *visit = i.ptr;
                iSidebarItem *item = new_SidebarItem();
                set_String(&item->url, &visit->url);
                iDate date;
                init_Date(&date, &visit->when);
                if (date.day != on.day || date.month != on.month || date.year != on.year) {
                    on = date;
                    /* Date separator. */
                    iSidebarItem *sep = new_SidebarItem();
                    sep->listItem.isSeparator = iTrue;
                    set_String(&sep->meta,
                               collect_String(format_Date(
                                   &date, date.year != thisYear ? "%b %d %Y" : "%b %d")));
                    addItem_ListWidget(d->list, sep);
                    iRelease(sep);
                    /* Date separators are two items tall. */
                    sep = new_SidebarItem();
                    sep->listItem.isSeparator = iTrue;
                    addItem_ListWidget(d->list, sep);
                    iRelease(sep);
                }
                addItem_ListWidget(d->list, item);
                iRelease(item);
            }
            d->menu = makeMenu_Widget(
                as_Widget(d),
                (iMenuItem[]){
                    { "Copy URL", 0, 0, "history.copy" },
                    { "Add Bookmark...", 0, 0, "history.addbookmark" },
                    { "---", 0, 0, NULL },
                    { "Remove URL", 0, 0, "history.delete" },
                    { "---", 0, 0, NULL },
                    { uiTextCaution_ColorEscape "Clear History...", 0, 0, "history.clear confirm:1" },
                }, 6);
            break;
        }
        case identities_SidebarMode: {
            const iString *tabUrl = url_DocumentWidget(document_App());
            iConstForEach(PtrArray, i, identities_GmCerts(certs_App())) {
                const iGmIdentity *ident = i.ptr;
                iSidebarItem *item = new_SidebarItem();
                item->id = index_PtrArrayConstIterator(&i);
                item->icon = ident->icon;
                set_String(&item->label, collect_String(subject_TlsCertificate(ident->cert)));
                iDate until;
                validUntil_TlsCertificate(ident->cert, &until);
                const iBool isActive = isUsedOn_GmIdentity(ident, tabUrl);
                format_String(
                    &item->meta,
                    "%s",
                    isActive ? "Using"
                             : isUsed_GmIdentity(ident)
                                   ? format_CStr("Used on %zu URLs", size_StringSet(ident->useUrls))
                                   : "Not used");
                const char *expiry =
                    ident->flags & temporary_GmIdentityFlag
                        ? "Temporary"
                        : cstrCollect_String(format_Date(&until, "Expires %b %d, %Y"));
                if (isEmpty_String(&ident->notes)) {
                    appendFormat_String(&item->meta, "\n%s", expiry);
                }
                else {
                    appendFormat_String(&item->meta,
                                        " \u2014 %s\n%s%s",
                                        expiry,
                                        escape_Color(uiHeading_ColorId),
                                        cstr_String(&ident->notes));
                }
                item->listItem.isSelected = isActive;
                addItem_ListWidget(d->list, item);
                iRelease(item);
            }
            const iMenuItem menuItems[] = {
                { "Use on This Page", 0, 0, "ident.use arg:1" },
                { "Stop Using This Page", 0, 0, "ident.use arg:0" },
                { "Stop Using Everywhere", 0, 0, "ident.use arg:0 clear:1" },
                { "Show Usage", 0, 0, "ident.showuse" },
                { "---", 0, 0, NULL },
                { "Edit Notes...", 0, 0, "ident.edit" },
                { "Pick Icon...", 0, 0, "ident.pickicon" },
                { "---", 0, 0, NULL },
                { "Reveal Files", 0, 0, "ident.reveal" },
                { uiTextCaution_ColorEscape "Delete Identity...", 0, 0, "ident.delete confirm:1" },
            };
            d->menu = makeMenu_Widget(as_Widget(d), menuItems, iElemCount(menuItems));
            break;
        }
        default:
            break;
    }
    updateVisible_SidebarWidget_(d);
    invalidate_ListWidget(d->list);
}

void setMode_SidebarWidget(iSidebarWidget *d, enum iSidebarMode mode) {
    if (d->mode == mode) return;
    if (d->mode >= 0 && d->mode < max_SidebarMode) {
        d->modeScroll[d->mode] = scrollPos_ListWidget(d->list); /* saved for later */
    }
    d->mode = mode;
    for (enum iSidebarMode i = 0; i < max_SidebarMode; i++) {
        setFlags_Widget(as_Widget(d->modeButtons[i]), selected_WidgetFlag, i == d->mode);
    }
    const float heights[max_SidebarMode] = { 1.333f, 1.333f, 3.5f, 1.2f };
    setBackgroundColor_Widget(as_Widget(d->list),
                              d->mode == documentOutline_SidebarMode ? tmBackground_ColorId
                                                                     : uiBackground_ColorId);
    setItemHeight_ListWidget(d->list, heights[mode] * lineHeight_Text(uiContent_FontId));
    /* Restore previous scroll position. */
    setScrollPos_ListWidget(d->list, d->modeScroll[mode]);
}

enum iSidebarMode mode_SidebarWidget(const iSidebarWidget *d) {
    return d->mode;
}

int width_SidebarWidget(const iSidebarWidget *d) {
    return d->width;
}

static const char *normalModeLabels_[max_SidebarMode] = {
    "\U0001f588 Bookmarks",
    "\U0001f553 History",
    "\U0001f464 Identities",
    "\U0001f5b9 Outline",
};

static const char *tightModeLabels_[max_SidebarMode] = {
    "\U0001f588",
    "\U0001f553",
    "\U0001f464",
    "\U0001f5b9",
};

void init_SidebarWidget(iSidebarWidget *d) {
    iWidget *w = as_Widget(d);
    init_Widget(w);
    setId_Widget(w, "sidebar");
    setBackgroundColor_Widget(w, none_ColorId);
    setFlags_Widget(w,
                    collapse_WidgetFlag | hidden_WidgetFlag | arrangeHorizontal_WidgetFlag |
                        resizeWidthOfChildren_WidgetFlag,
                    iTrue);
    iZap(d->modeScroll);
    d->mode  = -1;
    d->width = 60 * gap_UI;
    setFlags_Widget(w, fixedWidth_WidgetFlag, iTrue);
    d->maxButtonLabelWidth = 0;
    iWidget *vdiv = makeVDiv_Widget();
    addChildFlags_Widget(w, vdiv, resizeToParentWidth_WidgetFlag | resizeToParentHeight_WidgetFlag);
    iWidget *buttons = new_Widget();
    for (int i = 0; i < max_SidebarMode; i++) {
        d->modeButtons[i] = addChildFlags_Widget(
            buttons,
            iClob(
                new_LabelWidget(tightModeLabels_[i], 0, 0, format_CStr("sidebar.mode arg:%d", i))),
            frameless_WidgetFlag);
        d->maxButtonLabelWidth =
            iMaxi(d->maxButtonLabelWidth,
                  3 * gap_UI + measure_Text(uiLabel_FontId, normalModeLabels_[i]).x);
    }
    addChildFlags_Widget(vdiv,
                         iClob(buttons),
                         arrangeHorizontal_WidgetFlag | resizeWidthOfChildren_WidgetFlag |
                             arrangeHeight_WidgetFlag | resizeToParentWidth_WidgetFlag);
    d->list = new_ListWidget();
    setPadding_Widget(as_Widget(d->list), 0, gap_UI, 0, gap_UI);
    addChildFlags_Widget(vdiv, iClob(d->list), expand_WidgetFlag);
    setMode_SidebarWidget(d, documentOutline_SidebarMode);
    d->resizer = addChildFlags_Widget(
        w,
        iClob(new_Widget()),
        hover_WidgetFlag | commandOnClick_WidgetFlag | fixedWidth_WidgetFlag |
            resizeToParentHeight_WidgetFlag | moveToParentRightEdge_WidgetFlag);
    setId_Widget(d->resizer, "sidebar.grab");
    d->resizer->rect.size.x = gap_UI;
    setBackgroundColor_Widget(d->resizer, none_ColorId);
    d->resizeCursor = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZEWE);
    d->menu = NULL;
}

void deinit_SidebarWidget(iSidebarWidget *d) {
    SDL_FreeCursor(d->resizeCursor);
}

static const iGmIdentity *constHoverIdentity_SidebarWidget_(const iSidebarWidget *d) {
    if (d->mode == identities_SidebarMode) {
        const iSidebarItem *hoverItem = constHoverItem_ListWidget(d->list);
        if (hoverItem) {
            return identity_GmCerts(certs_App(), hoverItem->id);
        }
    }
    return NULL;
}

static iGmIdentity *hoverIdentity_SidebarWidget_(const iSidebarWidget *d) {
    return iConstCast(iGmIdentity *, constHoverIdentity_SidebarWidget_(d));
}

static void itemClicked_SidebarWidget_(iSidebarWidget *d, const iSidebarItem *item) {
    setFocus_Widget(NULL);
    switch (d->mode) {
        case documentOutline_SidebarMode: {
            const iGmDocument *doc = document_DocumentWidget(document_App());
            const iGmHeading *head = constAt_Array(headings_GmDocument(doc), item->id);
            postCommandf_App("document.goto loc:%p", head->text.start);
            break;
        }
        case bookmarks_SidebarMode:
        case history_SidebarMode: {
            if (!isEmpty_String(&item->url)) {
                postCommandf_App("open url:%s", cstr_String(&item->url));
            }
            break;
        }
        case identities_SidebarMode: {
            iGmIdentity *ident = hoverIdentity_SidebarWidget_(d);
            if (ident) {
                const iString *tabUrl = url_DocumentWidget(document_App());
                if (isUsedOn_GmIdentity(ident, tabUrl)) {
                    signOut_GmCerts(certs_App(), tabUrl);
                }
                else {
                    signIn_GmCerts(certs_App(), ident, tabUrl);
                }
                updateItems_SidebarWidget_(d);
                updateMouseHover_ListWidget(d->list);
            }
            break;
        }
        default:
            break;
    }
}

static void checkModeButtonLayout_SidebarWidget_(iSidebarWidget *d) {
    const iBool isTight =
        (width_Rect(bounds_Widget(as_Widget(d->modeButtons[0]))) < d->maxButtonLabelWidth);
    for (int i = 0; i < max_SidebarMode; i++) {
        if (isTight && ~flags_Widget(as_Widget(d->modeButtons[i])) & tight_WidgetFlag) {
            setFlags_Widget(as_Widget(d->modeButtons[i]), tight_WidgetFlag, iTrue);
            updateTextCStr_LabelWidget(d->modeButtons[i], tightModeLabels_[i]);
        }
        else if (!isTight && flags_Widget(as_Widget(d->modeButtons[i])) & tight_WidgetFlag) {
            setFlags_Widget(as_Widget(d->modeButtons[i]), tight_WidgetFlag, iFalse);
            updateTextCStr_LabelWidget(d->modeButtons[i], normalModeLabels_[i]);
        }
    }
}

void setWidth_SidebarWidget(iSidebarWidget *d, int width) {
    iWidget *w = as_Widget(d);
    width = iMax(30 * gap_UI, width);
    d->width = width;
    if (isVisible_Widget(w)) {
        w->rect.size.x = width;
    }
    arrange_Widget(findWidget_App("doctabs"));
    checkModeButtonLayout_SidebarWidget_(d);
    if (!isRefreshPending_App()) {
        updateSize_DocumentWidget(document_App());
        invalidate_ListWidget(d->list);
    }
}

iBool handleBookmarkEditorCommands_SidebarWidget_(iWidget *editor, const char *cmd) {
    if (equal_Command(cmd, "bmed.accept") || equal_Command(cmd, "cancel")) {
        iSidebarWidget *d = findWidget_App("sidebar");
        if (equal_Command(cmd, "bmed.accept")) {
            const iString *title = text_InputWidget(findChild_Widget(editor, "bmed.title"));
            const iString *url   = text_InputWidget(findChild_Widget(editor, "bmed.url"));
            const iString *tags  = text_InputWidget(findChild_Widget(editor, "bmed.tags"));
            const iSidebarItem *item = hoverItem_ListWidget(d->list);
            iAssert(item); /* hover item cannot have been changed */
            iBookmark *bm = get_Bookmarks(bookmarks_App(), item->id);
            set_String(&bm->title, title);
            set_String(&bm->url, url);
            set_String(&bm->tags, tags);
            postCommand_App("bookmarks.changed");
        }
        setFlags_Widget(as_Widget(d), disabled_WidgetFlag, iFalse);
        destroy_Widget(editor);
        return iTrue;
    }
    return iFalse;
}

static iBool processEvent_SidebarWidget_(iSidebarWidget *d, const SDL_Event *ev) {
    iWidget *w = as_Widget(d);
    /* Handle commands. */
    if (isResize_UserEvent(ev)) {
        updateVisible_SidebarWidget_(d);
        checkModeButtonLayout_SidebarWidget_(d);
        invalidate_ListWidget(d->list);
    }
    else if (ev->type == SDL_USEREVENT && ev->user.code == command_UserEventCode) {
        const char *cmd = command_UserEvent(ev);
        if (isCommand_Widget(w, ev, "mouse.clicked")) {
            if (argLabel_Command(cmd, "button") == SDL_BUTTON_LEFT) {
                if (arg_Command(cmd)) {
                    setFlags_Widget(d->resizer, pressed_WidgetFlag, iTrue);
                    setBackgroundColor_Widget(d->resizer, uiBackgroundFramelessHover_ColorId);
                    setMouseGrab_Widget(d->resizer);
                    refresh_Widget(d->resizer);
                }
                else {
                    setFlags_Widget(d->resizer, pressed_WidgetFlag, iFalse);
                    setBackgroundColor_Widget(d->resizer, none_ColorId);
                    setMouseGrab_Widget(NULL);
                    refresh_Widget(d->resizer);
                }
            }
            return iTrue;
        }
        else if (isCommand_Widget(w, ev, "mouse.moved")) {
            if (isResizing_SidebarWidget_(d)) {
                const iInt2 local = localCoord_Widget(w, coord_Command(cmd));
                setWidth_SidebarWidget(d, local.x + d->resizer->rect.size.x / 2);
            }
            return iTrue;
        }
        else if (isCommand_Widget(w, ev, "list.clicked")) {
            itemClicked_SidebarWidget_(d, pointerLabel_Command(cmd, "item"));
            return iTrue;
        }
        else if (equal_Command(cmd, "sidebar.width")) {
            setWidth_SidebarWidget(d, arg_Command(cmd));
            return iTrue;
        }
        else if (equal_Command(cmd, "sidebar.mode")) {
            setMode_SidebarWidget(d, arg_Command(cmd));
            updateItems_SidebarWidget_(d);
            if (argLabel_Command(cmd, "show") && !isVisible_Widget(w)) {
                postCommand_App("sidebar.toggle arg:1");
            }
            scrollOffset_ListWidget(d->list, 0);
            return iTrue;
        }
        else if (equal_Command(cmd, "sidebar.toggle")) {
            if (arg_Command(cmd) && isVisible_Widget(w)) {
                return iTrue;
            }
            setFlags_Widget(w, hidden_WidgetFlag, isVisible_Widget(w));
            if (isVisible_Widget(w)) {
                w->rect.size.x = d->width;
                invalidate_ListWidget(d->list);
            }
            arrange_Widget(w->parent);
            updateSize_DocumentWidget(document_App());
            refresh_Widget(w->parent);
            return iTrue;
        }
        else if (equal_Command(cmd, "tabs.changed") || equal_Command(cmd, "document.changed")) {
            updateItems_SidebarWidget_(d);
        }
        else if (equal_Command(cmd, "bookmark.copy")) {
            const iSidebarItem *item = hoverItem_ListWidget(d->list);
            if (d->mode == bookmarks_SidebarMode && item) {
                SDL_SetClipboardText(cstr_String(&item->url));
            }
            return iTrue;
        }
        else if (equal_Command(cmd, "bookmark.edit")) {
            const iSidebarItem *item = hoverItem_ListWidget(d->list);
            if (d->mode == bookmarks_SidebarMode && item) {
                setFlags_Widget(w, disabled_WidgetFlag, iTrue);
                iWidget *dlg = makeBookmarkEditor_Widget();
                iBookmark *bm = get_Bookmarks(bookmarks_App(), item->id);
                setText_InputWidget(findChild_Widget(dlg, "bmed.title"), &bm->title);
                setText_InputWidget(findChild_Widget(dlg, "bmed.url"), &bm->url);
                setText_InputWidget(findChild_Widget(dlg, "bmed.tags"), &bm->tags);
                setCommandHandler_Widget(dlg, handleBookmarkEditorCommands_SidebarWidget_);
                setFocus_Widget(findChild_Widget(dlg, "bmed.title"));
            }
            return iTrue;
        }
        else if (equal_Command(cmd, "bookmark.delete")) {
            const iSidebarItem *item = hoverItem_ListWidget(d->list);
            if (d->mode == bookmarks_SidebarMode && item && remove_Bookmarks(bookmarks_App(), item->id)) {
                postCommand_App("bookmarks.changed");
            }
            return iTrue;
        }
        else if (equal_Command(cmd, "bookmarks.changed") && d->mode == bookmarks_SidebarMode) {
            updateItems_SidebarWidget_(d);
        }
        else if (equal_Command(cmd, "idents.changed") && d->mode == identities_SidebarMode) {
            updateItems_SidebarWidget_(d);
        }
        else if (isCommand_Widget(w, ev, "ident.use")) {
            iGmIdentity *  ident  = hoverIdentity_SidebarWidget_(d);
            const iString *tabUrl = url_DocumentWidget(document_App());
            if (ident) {
                if (argLabel_Command(cmd, "clear")) {
                    clearUse_GmIdentity(ident);
                }
                else if (arg_Command(cmd)) {
                    signIn_GmCerts(certs_App(), ident, tabUrl);
                }
                else {
                    signOut_GmCerts(certs_App(), tabUrl);
                }
                updateItems_SidebarWidget_(d);
            }
            return iTrue;
        }
        else if (isCommand_Widget(w, ev, "ident.showuse")) {
            const iGmIdentity *ident = constHoverIdentity_SidebarWidget_(d);
            if (ident) {
                makeMessage_Widget(uiHeading_ColorEscape "IDENTITY USAGE",
                                   cstrCollect_String(joinCStr_StringSet(ident->useUrls, "\n")));
            }
            return iTrue;
        }
        else if (isCommand_Widget(w, ev, "ident.edit")) {
            const iGmIdentity *ident = constHoverIdentity_SidebarWidget_(d);
            if (ident) {
                makeValueInput_Widget(get_Window()->root,
                                      &ident->notes,
                                      uiHeading_ColorEscape "IDENTITY NOTES",
                                      format_CStr("Notes about %s:", cstr_String(name_GmIdentity(ident))),
                                      uiTextAction_ColorEscape "OK",
                                      format_CStr("ident.setnotes ident:%p", ident));
            }
            return iTrue;
        }
        else if (equal_Command(cmd, "ident.setnotes")) {
            iGmIdentity *ident = pointerLabel_Command(cmd, "ident");
            if (ident) {
                setCStr_String(&ident->notes, suffixPtr_Command(cmd, "value"));
                updateItems_SidebarWidget_(d);
            }
            return iTrue;
        }
        else if (isCommand_Widget(w, ev, "ident.pickicon")) {
            return iTrue;
        }
        else if (isCommand_Widget(w, ev, "ident.reveal")) {
            const iGmIdentity *ident = constHoverIdentity_SidebarWidget_(d);
            if (ident) {
                const iString *crtPath = certificatePath_GmCerts(certs_App(), ident);
                if (crtPath) {
                    revealPath_App(crtPath);
                }
            }
            return iTrue;
        }
        else if (equal_Command(cmd, "ident.delete")) {
            iSidebarItem *item = hoverItem_ListWidget(d->list);
            if (argLabel_Command(cmd, "confirm")) {
                makeQuestion_Widget(uiTextCaution_ColorEscape "DELETE IDENTITY",
                                    format_CStr("Do you really want to delete the identity\n"
                                                uiTextAction_ColorEscape "%s\n"
                                                uiText_ColorEscape
                                                "including its certificate and private key files?",
                                                cstr_String(&item->label)),
                                    (const char *[]){ "Cancel",
                                                      uiTextCaution_ColorEscape
                                                      "Delete Identity and Files" },
                                    (const char *[]){ "cancel", "ident.delete confirm:0" },
                                    2);
                return iTrue;
            }
            deleteIdentity_GmCerts(certs_App(), hoverIdentity_SidebarWidget_(d));
            updateItems_SidebarWidget_(d);
            return iTrue;
        }
        else if (equal_Command(cmd, "history.delete")) {
            const iSidebarItem *item = hoverItem_ListWidget(d->list);
            if (item && !isEmpty_String(&item->url)) {
                removeUrl_Visited(visited_App(), &item->url);
                updateItems_SidebarWidget_(d);
                scrollOffset_ListWidget(d->list, 0);
            }
            return iTrue;
        }
        else if (equal_Command(cmd, "history.copy")) {
            const iSidebarItem *item = hoverItem_ListWidget(d->list);
            if (item && !isEmpty_String(&item->url)) {
                SDL_SetClipboardText(cstr_String(&item->url));
            }
            return iTrue;
        }
        else if (equal_Command(cmd, "history.addbookmark")) {
            const iSidebarItem *item = hoverItem_ListWidget(d->list);
            if (!isEmpty_String(&item->url)) {
                makeBookmarkCreation_Widget(
                    &item->url,
                    collect_String(newRange_String(urlHost_String(&item->url))),
                    0x1f310 /* globe */);
            }
        }
        else if (equal_Command(cmd, "history.clear")) {
            if (argLabel_Command(cmd, "confirm")) {
                makeQuestion_Widget(
                    uiTextCaution_ColorEscape "CLEAR HISTORY",
                    "Do you really want to erase the history of all visited pages?",
                    (const char *[]){ "Cancel", uiTextCaution_ColorEscape "Clear History" },
                    (const char *[]){ "cancel", "history.clear confirm:0" },
                    2);
            }
            else {
                clear_Visited(visited_App());
                updateItems_SidebarWidget_(d);
                scrollOffset_ListWidget(d->list, 0);
            }
            return iTrue;
        }
    }
    if (ev->type == SDL_MOUSEMOTION && !isVisible_Widget(d->menu)) {
        const iInt2 mouse = init_I2(ev->motion.x, ev->motion.y);
        if (contains_Widget(d->resizer, mouse)) {
            setCursor_Window(get_Window(), SDL_SYSTEM_CURSOR_SIZEWE);
        }
        /* Update cursor. */
        else if (contains_Widget(w, mouse)) {
            const iSidebarItem *item = constHoverItem_ListWidget(d->list);
            if (item && d->mode != identities_SidebarMode) {
                setCursor_Window(get_Window(),
                                 item->listItem.isSeparator ? SDL_SYSTEM_CURSOR_ARROW
                                                            : SDL_SYSTEM_CURSOR_HAND);
            }
            else {
                setCursor_Window(get_Window(), SDL_SYSTEM_CURSOR_ARROW);
            }
        }
    }
    if (d->menu && ev->type == SDL_MOUSEBUTTONDOWN) {
        if (ev->button.button == SDL_BUTTON_RIGHT) {
            if (!isVisible_Widget(d->menu)) {
                updateMouseHover_ListWidget(d->list);
            }
            if (constHoverItem_ListWidget(d->list) || isVisible_Widget(d->menu)) {
                /* Update menu items. */
                if (d->mode == identities_SidebarMode) {
                    const iGmIdentity *ident  = constHoverIdentity_SidebarWidget_(d);
                    const iString *    docUrl = url_DocumentWidget(document_App());
                    iForEach(ObjectList, i, children_Widget(d->menu)) {
                        if (isInstance_Object(i.object, &Class_LabelWidget)) {
                            iLabelWidget *menuItem = i.object;
                            const char *  cmdItem  = cstr_String(command_LabelWidget(menuItem));
                            if (equal_Command(cmdItem, "ident.use")) {
                                const iBool cmdUse   = arg_Command(cmdItem) != 0;
                                const iBool cmdClear = argLabel_Command(cmdItem, "clear") != 0;
                                setFlags_Widget(
                                    as_Widget(menuItem),
                                    disabled_WidgetFlag,
                                    (cmdClear && !isUsed_GmIdentity(ident)) ||
                                        (!cmdClear && cmdUse && isUsedOn_GmIdentity(ident, docUrl)) ||
                                        (!cmdClear && !cmdUse && !isUsedOn_GmIdentity(ident, docUrl)));
                            }
                            else if (equal_Command(cmdItem, "ident.showuse")) {
                                setFlags_Widget(as_Widget(menuItem),
                                                disabled_WidgetFlag,
                                                !isUsed_GmIdentity(ident));
                            }
                        }
                    }
                }
            }
        }
    }
    processContextMenuEvent_Widget(d->menu, ev, {});
    return processEvent_Widget(w, ev);
}

static void draw_SidebarWidget_(const iSidebarWidget *d) {
    const iWidget *w      = constAs_Widget(d);
    const iRect    bounds = bounds_Widget(w);
    iPaint p;
    init_Paint(&p);
    draw_Widget(w);
    drawVLine_Paint(
        &p, addX_I2(topRight_Rect(bounds), -1), height_Rect(bounds), uiSeparator_ColorId);
}

static void draw_SidebarItem_(const iSidebarItem *d, iPaint *p, iRect itemRect,
                              const iListWidget *list) {
    const iSidebarWidget *sidebar    = findParentClass_Widget(constAs_Widget(list),
                                                              &Class_SidebarWidget);
    const iBool           isPressing = isMouseDown_ListWidget(list);
    const int             font       = uiContent_FontId;
    const iBool           isHover =
        isHover_Widget(constAs_Widget(list)) && constHoverItem_ListWidget(list) == d;
    const int itemHeight = height_Rect(itemRect);
    const int iconColor =
        isHover ? (isPressing ? uiTextPressed_ColorId : uiIconHover_ColorId) : uiIcon_ColorId;
    if (isHover && !d->listItem.isSeparator) {
        fillRect_Paint(p,
                       itemRect,
                       isPressing ? uiBackgroundPressed_ColorId
                                  : uiBackgroundFramelessHover_ColorId);
    }
    iInt2 pos = itemRect.pos;
    if (sidebar->mode == documentOutline_SidebarMode) {
        const int fg = isHover ? (isPressing ? uiTextPressed_ColorId : uiTextFramelessHover_ColorId)
                               : (tmHeading1_ColorId + d->indent / (4 * gap_UI));
        drawRange_Text(font,
                       init_I2(pos.x + 3 * gap_UI + d->indent,
                               mid_Rect(itemRect).y - lineHeight_Text(font) / 2),
                       fg,
                       range_String(&d->label));
    }
    else if (sidebar->mode == bookmarks_SidebarMode) {
        const int fg = isHover ? (isPressing ? uiTextPressed_ColorId : uiTextFramelessHover_ColorId)
                               : uiText_ColorId;
        iString str;
        init_String(&str);
        appendChar_String(&str, d->icon ? d->icon : 0x1f588);
        const iRect iconArea = { addX_I2(pos, gap_UI), init_I2(7 * gap_UI, itemHeight) };
        drawCentered_Text(font, iconArea, iTrue, iconColor, "%s", cstr_String(&str));
        deinit_String(&str);
        iInt2 textPos = addY_I2(topRight_Rect(iconArea), (itemHeight - lineHeight_Text(font)) / 2);
        drawRange_Text(font, textPos, fg, range_String(&d->label));
    }
    else if (sidebar->mode == history_SidebarMode) {
        iBeginCollect();
        const int fg = isHover ? (isPressing ? uiTextPressed_ColorId : uiTextFramelessHover_ColorId)
                               : uiText_ColorId;
        if (d->listItem.isSeparator) {
            if (!isEmpty_String(&d->meta)) {
                unsetClip_Paint(p);
                iInt2 drawPos = addY_I2(topLeft_Rect(itemRect), itemHeight * 0.666f);
                drawHLine_Paint(p, drawPos, width_Rect(itemRect), uiIcon_ColorId);
                drawRange_Text(
                    default_FontId,
                    add_I2(drawPos,
                           init_I2(3 * gap_UI, (itemHeight - lineHeight_Text(default_FontId)) / 2)),
                    uiIcon_ColorId,
                    range_String(&d->meta));
            }
        }
        else {
            iUrl parts;
            init_Url(&parts, &d->url);
            const iBool isGemini = equalCase_Rangecc(parts.scheme, "gemini");
            draw_Text(font,
                      add_I2(topLeft_Rect(itemRect),
                             init_I2(3 * gap_UI, (itemHeight - lineHeight_Text(font)) / 2)),
                      fg,
                      "%s%s%s%s%s%s",
                      isGemini ? "" : cstr_Rangecc(parts.scheme),
                      isGemini ? "" : "://",
                      escape_Color(isHover ? (isPressing ? uiTextPressed_ColorId
                                                         : uiTextFramelessHover_ColorId)
                                           : uiTextStrong_ColorId),
                      cstr_Rangecc(parts.host),
                      escape_Color(fg),
                      cstr_Rangecc(parts.path));
        }
        iEndCollect();
    }
    else if (sidebar->mode == identities_SidebarMode) {
        const int fg = isHover ? (isPressing ? uiTextPressed_ColorId : uiTextFramelessHover_ColorId)
                               : uiTextStrong_ColorId;
        if (d->listItem.isSelected) {
            drawRectThickness_Paint(p,
                                    adjusted_Rect(itemRect, zero_I2(), init_I2(-2, -1)),
                                    gap_UI / 4,
                                    isHover && isPressing ? uiTextPressed_ColorId : uiIcon_ColorId);
        }
        iString icon;
        initUnicodeN_String(&icon, &d->icon, 1);
        iInt2 cPos = topLeft_Rect(itemRect);
        addv_I2(&cPos,
                init_I2(3 * gap_UI,
                        (itemHeight - lineHeight_Text(default_FontId) * 2 - lineHeight_Text(font)) /
                            2));
        const int metaFg = isHover ? permanent_ColorId | (isPressing ? uiTextPressed_ColorId
                                                                     : uiTextFramelessHover_ColorId)
                                   : uiText_ColorId;
        drawRange_Text(
            font, cPos, d->listItem.isSelected ? iconColor : metaFg, range_String(&icon));
        deinit_String(&icon);
        drawRange_Text(font, add_I2(cPos, init_I2(6 * gap_UI, 0)), fg, range_String(&d->label));
        drawRange_Text(default_FontId,
                       add_I2(cPos, init_I2(6 * gap_UI, lineHeight_Text(font))),
                       metaFg,
                       range_String(&d->meta));
    }
}

iBeginDefineSubclass(SidebarWidget, Widget)
    .processEvent = (iAny *) processEvent_SidebarWidget_,
    .draw         = (iAny *) draw_SidebarWidget_,
iEndDefineSubclass(SidebarWidget)