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pyxis/lib/tdeck_ui/UI/LXMF/NomadNetScreen.cpp
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#include "NomadNetScreen.h"
#ifdef ARDUINO
#include "Theme.h"
#include "NomadNetDisplay.h"
#include "NomadNetGlyphs.h"
#include "../LVGL/LVGLInit.h"
#include "../TextAreaHelper.h"
#include <algorithm>
#include <cstring>
#include <cstdio>
#if defined(PYXIS_NOMAD_MEMORY_DIAGNOSTIC)
#include <esp_heap_caps.h>
#endif
namespace UI::LXMF {
namespace {
#if defined(PYXIS_NOMAD_MEMORY_DIAGNOSTIC)
void nomad_screen_heap_checkpoint(const char* phase) {
Serial.printf(
"T:NOMAD_HEAP phase=%s free=%u largest=%u minimum=%u psram=%u\n",
phase,
static_cast<unsigned>(heap_caps_get_free_size(MALLOC_CAP_INTERNAL)),
static_cast<unsigned>(heap_caps_get_largest_free_block(MALLOC_CAP_INTERNAL)),
static_cast<unsigned>(heap_caps_get_minimum_free_size(MALLOC_CAP_INTERNAL)),
static_cast<unsigned>(heap_caps_get_free_size(MALLOC_CAP_SPIRAM)));
}
#else
void nomad_screen_heap_checkpoint(const char*) {}
#endif
const lv_font_t* run_font(const NomadNet::CompactPage::RunRecord& run, bool large) {
const bool italic = run.style & NomadNet::CompactPage::ITALIC;
if (large) return italic ? &nomadnet_font_16_italic : &nomadnet_font_16;
return italic ? &nomadnet_font_12_italic : &nomadnet_font_12;
}
}
NomadNetScreen::NomadNetScreen() {
_screen=lv_obj_create(lv_scr_act()); lv_obj_set_size(_screen,320,240);
lv_obj_set_style_bg_color(_screen,Theme::surface(),0); lv_obj_set_style_border_width(_screen,0,0); lv_obj_set_style_pad_all(_screen,0,0);
lv_obj_t* header=lv_obj_create(_screen); lv_obj_set_size(header,LV_PCT(100),34); lv_obj_align(header,LV_ALIGN_TOP_MID,0,0);
lv_obj_set_style_bg_color(header,Theme::surfaceHeader(),0); lv_obj_set_style_border_width(header,0,0); lv_obj_set_style_pad_all(header,2,0);
_back_button=lv_btn_create(header); lv_obj_set_size(_back_button,36,28); lv_obj_align(_back_button,LV_ALIGN_LEFT_MID,0,0);
lv_obj_t* bl=lv_label_create(_back_button);lv_label_set_text(bl,LV_SYMBOL_LEFT);lv_obj_center(bl);
_home_button=lv_btn_create(header);lv_obj_set_size(_home_button,36,28);lv_obj_align(_home_button,LV_ALIGN_LEFT_MID,40,0);
lv_obj_t* hl=lv_label_create(_home_button);lv_label_set_text(hl,LV_SYMBOL_HOME);lv_obj_center(hl);
lv_obj_t* title=lv_label_create(header);lv_label_set_text(title,"NomadNet");lv_obj_set_style_text_font(title,&lv_font_montserrat_14,0);lv_obj_center(title);
_reload_button=lv_btn_create(header);lv_obj_set_size(_reload_button,36,28);lv_obj_align(_reload_button,LV_ALIGN_RIGHT_MID,0,0);
lv_obj_t* rl=lv_label_create(_reload_button);lv_label_set_text(rl,LV_SYMBOL_REFRESH);lv_obj_center(rl);
_save_button=lv_btn_create(header);lv_obj_set_size(_save_button,36,28);lv_obj_align(_save_button,LV_ALIGN_RIGHT_MID,-40,0);
lv_obj_t* sl=lv_label_create(_save_button);lv_label_set_text(sl,LV_SYMBOL_SAVE);lv_obj_center(sl);
for(auto* button:{_back_button,_home_button,_reload_button,_save_button}) {
lv_obj_set_style_bg_color(button,Theme::surfaceContainer(),0);
lv_obj_set_style_bg_color(button,Theme::primaryPressed(),LV_STATE_FOCUSED);
lv_obj_set_style_border_width(button,0,0);
lv_obj_set_style_radius(button,8,0);
}
_address_row=lv_obj_create(_screen);lv_obj_set_size(_address_row,LV_PCT(100),38);lv_obj_align(_address_row,LV_ALIGN_TOP_MID,0,34);
lv_obj_set_style_bg_color(_address_row,Theme::surface(),0);lv_obj_set_style_border_width(_address_row,0,0);lv_obj_set_style_pad_all(_address_row,3,0);
_address=lv_textarea_create(_address_row);lv_obj_set_size(_address,270,30);lv_obj_align(_address,LV_ALIGN_LEFT_MID,0,0);
lv_textarea_set_one_line(_address,true);lv_textarea_set_max_length(_address,511);lv_textarea_set_placeholder_text(_address,"destination:/page/path");
lv_obj_set_style_text_font(_address,&nomadnet_font_12,0);lv_obj_set_style_bg_color(_address,Theme::surfaceInput(),0);TextAreaHelper::enable_paste(_address);
_go_button=lv_btn_create(_address_row);lv_obj_set_size(_go_button,42,30);lv_obj_align(_go_button,LV_ALIGN_RIGHT_MID,0,0);
lv_obj_set_style_bg_color(_go_button,Theme::primary(),0);lv_obj_set_style_radius(_go_button,8,0);
lv_obj_t* gl=lv_label_create(_go_button);lv_label_set_text(gl,"Go");lv_obj_center(gl);
_address_summary=lv_label_create(_address_row);lv_obj_set_size(_address_summary,266,24);lv_obj_align(_address_summary,LV_ALIGN_LEFT_MID,4,0);
lv_label_set_long_mode(_address_summary,LV_LABEL_LONG_DOT);lv_obj_set_style_text_font(_address_summary,&nomadnet_font_12,0);
lv_obj_set_style_text_color(_address_summary,Theme::textSecondary(),0);
_edit_button=lv_btn_create(_address_row);lv_obj_set_size(_edit_button,36,26);lv_obj_align(_edit_button,LV_ALIGN_RIGHT_MID,0,0);
lv_obj_set_style_bg_color(_edit_button,Theme::surfaceContainer(),0);lv_obj_set_style_bg_color(_edit_button,Theme::primaryPressed(),LV_STATE_FOCUSED);
lv_obj_set_style_border_width(_edit_button,0,0);lv_obj_set_style_radius(_edit_button,8,0);
lv_obj_t* edit=lv_label_create(_edit_button);lv_label_set_text(edit,LV_SYMBOL_EDIT);lv_obj_center(edit);
lv_obj_add_flag(_address_summary,LV_OBJ_FLAG_HIDDEN);lv_obj_add_flag(_edit_button,LV_OBJ_FLAG_HIDDEN);
_status=lv_label_create(_screen);lv_obj_set_size(_status,312,18);lv_obj_align(_status,LV_ALIGN_TOP_LEFT,4,72);
lv_obj_set_style_text_font(_status,&lv_font_montserrat_12,0);lv_obj_set_style_text_color(_status,Theme::textTertiary(),0);
_content=lv_obj_create(_screen);lv_obj_set_size(_content,320,150);lv_obj_align(_content,LV_ALIGN_BOTTOM_MID,0,0);
lv_obj_set_style_bg_color(_content,Theme::surface(),0);lv_obj_set_style_border_width(_content,0,0);lv_obj_set_style_pad_all(_content,8,0);
lv_obj_set_flex_flow(_content,LV_FLEX_FLOW_COLUMN);lv_obj_set_flex_align(_content,LV_FLEX_ALIGN_START,LV_FLEX_ALIGN_START,LV_FLEX_ALIGN_START);
lv_obj_add_flag(_content,LV_OBJ_FLAG_SCROLLABLE);
lv_obj_set_scroll_dir(_content,LV_DIR_VER);lv_obj_set_scrollbar_mode(_content,LV_SCROLLBAR_MODE_AUTO);
lv_obj_add_flag(_content,LV_OBJ_FLAG_CLICKABLE);
lv_obj_add_event_cb(_content,page_event,LV_EVENT_ALL,this);
_directory=lv_obj_create(_screen);lv_obj_set_size(_directory,320,206);lv_obj_align(_directory,LV_ALIGN_BOTTOM_MID,0,0);
lv_obj_set_style_bg_color(_directory,Theme::surface(),0);lv_obj_set_style_border_width(_directory,0,0);lv_obj_set_style_pad_all(_directory,7,0);
lv_obj_set_flex_flow(_directory,LV_FLEX_FLOW_COLUMN);lv_obj_set_flex_align(_directory,LV_FLEX_ALIGN_START,LV_FLEX_ALIGN_START,LV_FLEX_ALIGN_START);
lv_obj_set_style_pad_row(_directory,4,0);lv_obj_set_scroll_dir(_directory,LV_DIR_VER);lv_obj_set_scrollbar_mode(_directory,LV_SCROLLBAR_MODE_AUTO);
for(auto* o:{_back_button,_home_button,_reload_button,_save_button,_go_button,_edit_button})lv_obj_add_event_cb(o,clicked,LV_EVENT_CLICKED,this);
lv_obj_add_event_cb(_address,clicked,LV_EVENT_READY,this);
lv_obj_add_flag(_save_button,LV_OBJ_FLAG_HIDDEN);
set_status("Enter a NomadNet address");show_start();hide();
}
NomadNetScreen::~NomadNetScreen(){if(_screen)lv_obj_del(_screen);}
void NomadNetScreen::set_address(const std::string& value){
lv_textarea_set_text(_address,value.c_str());
const auto summary=NomadNet::display_text(NomadNet::compact_address(value));
lv_label_set_text(_address_summary,summary.c_str());
}
std::string NomadNetScreen::address()const{return lv_textarea_get_text(_address);}
void NomadNetScreen::set_library(const NomadNet::Library& library){
_library=library;
if(_view!=View::BROWSER)render_directory(_view);
}
void NomadNetScreen::set_page_saved(bool saved){
lv_obj_set_style_bg_color(_save_button,saved?Theme::primary():Theme::surfaceContainer(),0);
}
void NomadNetScreen::clear_document(){
nomad_screen_heap_checkpoint("clear-before");
auto* group=LVGL::LVGLInit::get_default_group();
if(group){
if(lv_group_get_editing(group)&&lv_group_get_focused(group)==_content)lv_group_set_editing(group,false);
lv_group_remove_obj(_content);
}
_page.clear();
NomadNet::ExternalVector<LayoutFragment>().swap(_page_layout);
_page_height=0;
_selected_link=-1;
lv_obj_refresh_self_size(_content);
lv_obj_invalidate(_content);
_page_loaded=false;
set_page_saved(false);
nomad_screen_heap_checkpoint("clear-after");
}
void NomadNetScreen::clear_directory(){
auto* group=LVGL::LVGLInit::get_default_group();
if(group)detach_focusables(group);
lv_obj_clean(_directory);
std::vector<lv_obj_t*>().swap(_directory_focusables);
std::vector<std::string>().swap(_directory_targets);
}
void NomadNetScreen::begin_navigation(const std::string& target){
clear_document();
clear_directory();
set_address(target);
show_browser(false);
set_status("Opening NomadNet page...");
}
void NomadNetScreen::show_start(){
clear_document();
render_directory(View::START);
}
bool NomadNetScreen::handle_library_back(){
if(_view==View::START)return false;
show_start();
return true;
}
void NomadNetScreen::show_browser(bool editing){
_view=View::BROWSER;
_directory_visible.store(false,std::memory_order_release);
lv_obj_add_flag(_directory,LV_OBJ_FLAG_HIDDEN);
for(auto* object:{_address_row,_status,_content,_reload_button})lv_obj_clear_flag(object,LV_OBJ_FLAG_HIDDEN);
if(_page_loaded)lv_obj_clear_flag(_save_button,LV_OBJ_FLAG_HIDDEN);else lv_obj_add_flag(_save_button,LV_OBJ_FLAG_HIDDEN);
set_address_editing(editing);
rebuild_focus();
}
void NomadNetScreen::render_directory(View view){
clear_directory();
_view=view;
_directory_visible.store(true,std::memory_order_release);
lv_obj_clear_flag(_directory,LV_OBJ_FLAG_HIDDEN);
for(auto* object:{_address_row,_status,_content,_reload_button,_save_button})lv_obj_add_flag(object,LV_OBJ_FLAG_HIDDEN);
// LVGL automatically enrols newly constructed group-capable widgets in the
// default group and focuses the first member of an empty group. Keep the
// replacement rows detached until rebuild_focus() can install the complete
// membership and choose one final owner.
auto* previous_default_group=lv_group_get_default();
lv_group_set_default(nullptr);
auto add_row=[&](const std::string& title,const std::string& detail,std::size_t code,const char* symbol=nullptr){
lv_obj_t* button=lv_btn_create(_directory);lv_obj_set_size(button,306,35);lv_obj_set_flex_grow(button,0);
lv_obj_set_style_bg_color(button,Theme::surfaceContainer(),0);lv_obj_set_style_bg_color(button,Theme::primaryPressed(),LV_STATE_FOCUSED);
// The default theme adds a blue outline for keypad focus on top of this
// purple focused background. Keep one stable visual focus treatment.
lv_obj_set_style_outline_width(button,0,LV_STATE_FOCUS_KEY);
lv_obj_set_style_border_width(button,0,0);lv_obj_set_style_radius(button,8,0);lv_obj_set_style_pad_all(button,4,0);
lv_coord_t title_x=2;
lv_coord_t title_width=286;
if(symbol){
lv_obj_t* icon=lv_label_create(button);lv_label_set_text(icon,symbol);
lv_obj_set_style_text_font(icon,&lv_font_montserrat_12,0);lv_obj_align(icon,LV_ALIGN_TOP_LEFT,2,0);
title_x=20;title_width=268;
}
const auto rendered_title=NomadNet::display_text(title);
lv_obj_t* primary=lv_label_create(button);lv_label_set_text(primary,rendered_title.c_str());lv_label_set_long_mode(primary,LV_LABEL_LONG_DOT);
lv_obj_set_width(primary,title_width);lv_obj_set_style_text_font(primary,&nomadnet_font_12,0);lv_obj_align(primary,LV_ALIGN_TOP_LEFT,title_x,0);
if(!detail.empty()){
const auto rendered_detail=NomadNet::display_text(detail);
lv_obj_t* secondary=lv_label_create(button);lv_label_set_text(secondary,rendered_detail.c_str());lv_label_set_long_mode(secondary,LV_LABEL_LONG_DOT);
lv_obj_set_width(secondary,286);lv_obj_set_style_text_font(secondary,&nomadnet_font_12,0);lv_obj_set_style_text_color(secondary,Theme::textTertiary(),0);
lv_obj_align(secondary,LV_ALIGN_BOTTOM_LEFT,2,0);
}
lv_obj_set_user_data(button,reinterpret_cast<void*>(code));lv_obj_add_event_cb(button,clicked,LV_EVENT_CLICKED,this);
_directory_focusables.push_back(button);
};
if(view==View::START){
add_row("Heard Nodes","Recently announced NomadNet nodes",1001,LV_SYMBOL_DIRECTORY);
add_row("Saved Nodes","Bookmarked destinations",1002,LV_SYMBOL_DIRECTORY);
add_row("Saved Pages","Bookmarked destination and path",1003,LV_SYMBOL_SAVE);
add_row("Recent Pages","Bounded browsing history",1004,LV_SYMBOL_LIST);
add_row("Enter Address","Advanced destination/path entry",1005,LV_SYMBOL_EDIT);
}else if(view==View::HEARD||view==View::SAVED_NODES){
for(const auto& node:_library.nodes()){
if(view==View::SAVED_NODES&&!node.saved)continue;
const std::string target=node.destination_hex+":/page/index.mu";
_directory_targets.push_back(target);
char detail[48];
std::snprintf(detail,sizeof(detail),"%s / %s",node.hops==0?"Direct":(std::to_string(node.hops)+" hops").c_str(),node.saved?"Saved":"Heard");
add_row(node.name.empty()?NomadNet::compact_address(target,28):node.name,detail,2000+_directory_targets.size());
}
}else{
for(const auto& page:_library.pages()){
if(view==View::SAVED_PAGES&&!page.saved)continue;
_directory_targets.push_back(page.url);
const auto colon=page.url.find(':');
const std::string path=colon==std::string::npos?page.url:page.url.substr(colon+1);
add_row(page.title.empty()?NomadNet::compact_address(page.url,28):page.title,path,2000+_directory_targets.size());
}
}
if(_directory_focusables.empty()){
lv_obj_t* empty=lv_label_create(_directory);
lv_label_set_text(empty,view==View::HEARD?"No NomadNet nodes heard yet":view==View::SAVED_NODES?"No saved nodes":view==View::SAVED_PAGES?"No saved pages":"No recent pages");
lv_obj_set_style_text_color(empty,Theme::textTertiary(),0);lv_obj_set_style_text_font(empty,&nomadnet_font_12,0);
}
lv_group_set_default(previous_default_group);
rebuild_focus();
}
void NomadNetScreen::detach_focusables(lv_group_t* group){
if(!group)return;
auto* focused=lv_group_get_focused(group);
auto owned_focusable=[&](lv_obj_t* candidate){
if(!candidate)return false;
for(auto* object:{_back_button,_home_button,_reload_button,_save_button,_address,_go_button,_edit_button})
if(candidate==object)return true;
if(candidate==_content)return true;
for(auto* object:_directory_focusables)if(candidate==object)return true;
return false;
};
auto detach_non_owner=[&](lv_obj_t* object){
if(object&&object!=focused)lv_group_remove_obj(object);
};
for(auto* object:{_back_button,_home_button,_reload_button,_save_button,_address,_go_button,_edit_button})detach_non_owner(object);
detach_non_owner(_content);
for(auto* object:_directory_focusables)detach_non_owner(object);
if(focused&&owned_focusable(focused))lv_group_remove_obj(focused);
}
void NomadNetScreen::rebuild_focus(){
if(!_visible)return;
auto* group=LVGL::LVGLInit::get_default_group();if(!group)return;
detach_focusables(group);
// Adding the first member to an empty LVGL group normally focuses it. Freeze
// while restoring navigation order, then assign the intended owner once.
lv_group_focus_freeze(group,true);
lv_group_add_obj(group,_back_button);lv_group_add_obj(group,_home_button);
if(_view!=View::BROWSER){
for(auto* object:_directory_focusables)lv_group_add_obj(group,object);
auto* final_focus=!_directory_focusables.empty()?_directory_focusables.front():_back_button;
lv_group_focus_freeze(group,false);
lv_group_focus_obj(final_focus);
return;
}
lv_group_add_obj(group,_reload_button);
if(!lv_obj_has_flag(_save_button,LV_OBJ_FLAG_HIDDEN))lv_group_add_obj(group,_save_button);
if(_editing){lv_group_add_obj(group,_address);lv_group_add_obj(group,_go_button);}
else lv_group_add_obj(group,_edit_button);
if(!_page.empty())lv_group_add_obj(group,_content);
// Keep a newly loaded document at its beginning. Focusing the first link
// makes LVGL auto-scroll that link into view, which can hide the heading.
lv_group_focus_freeze(group,false);
lv_group_focus_obj(_editing?_address:_edit_button);
}
void NomadNetScreen::apply_browser_layout(bool show_status){
if(_editing){
lv_obj_set_height(_address_row,38);lv_obj_align(_address_row,LV_ALIGN_TOP_MID,0,34);
lv_obj_align(_status,LV_ALIGN_TOP_LEFT,4,72);
lv_obj_set_height(_content,show_status?150:168);
}else{
lv_obj_set_height(_address_row,30);lv_obj_align(_address_row,LV_ALIGN_TOP_MID,0,34);
lv_obj_align(_status,LV_ALIGN_TOP_LEFT,4,64);
lv_obj_set_height(_content,show_status?158:176);
}
if(show_status)lv_obj_clear_flag(_status,LV_OBJ_FLAG_HIDDEN);else lv_obj_add_flag(_status,LV_OBJ_FLAG_HIDDEN);
lv_obj_align(_content,LV_ALIGN_BOTTOM_MID,0,0);
}
void NomadNetScreen::set_address_editing(bool editing){
auto* group=LVGL::LVGLInit::get_default_group();
if(_visible&&group){lv_group_remove_obj(_address);lv_group_remove_obj(_go_button);lv_group_remove_obj(_edit_button);}
_editing=editing;
if(editing){
lv_obj_clear_flag(_address,LV_OBJ_FLAG_HIDDEN);lv_obj_clear_flag(_go_button,LV_OBJ_FLAG_HIDDEN);
lv_obj_add_flag(_address_summary,LV_OBJ_FLAG_HIDDEN);lv_obj_add_flag(_edit_button,LV_OBJ_FLAG_HIDDEN);
}else{
lv_obj_add_flag(_address,LV_OBJ_FLAG_HIDDEN);lv_obj_add_flag(_go_button,LV_OBJ_FLAG_HIDDEN);
lv_obj_clear_flag(_address_summary,LV_OBJ_FLAG_HIDDEN);lv_obj_clear_flag(_edit_button,LV_OBJ_FLAG_HIDDEN);
}
const bool show_status=!lv_obj_has_flag(_status,LV_OBJ_FLAG_HIDDEN);
apply_browser_layout(show_status);
if(_visible&&group){
if(editing){lv_group_add_obj(group,_address);lv_group_add_obj(group,_go_button);lv_group_focus_obj(_address);}
else{lv_group_add_obj(group,_edit_button);lv_group_focus_obj(_edit_button);}
}
}
void NomadNetScreen::set_status(const char* value){
const std::string status=value?value:"";
lv_label_set_text(_status,status.c_str());
const bool loaded_ack=_page_loaded&&status.rfind("Page loaded",0)==0;
apply_browser_layout(!loaded_ack);
}
bool NomadNetScreen::set_page(const NomadNet::Document& document) {
auto* group=LVGL::LVGLInit::get_default_group();
if(group)lv_group_remove_obj(_content);
if(!_page.assign(document)) {
clear_document();
set_status("Page is too large for available memory");
return false;
}
if(_page.truncated())_page.append_notice("[Page truncated to device safety limits]");
else if(_page.unsupported())_page.append_notice("[Unsupported Micron content]");
layout_page();
lv_obj_set_style_bg_color(_content,_page.has_background()
?lv_color_hex(_page.background()):Theme::surface(),0);
_page_loaded=true;
show_browser(false);
lv_obj_scroll_to_y(_content,0,LV_ANIM_OFF);
lv_obj_refresh_self_size(_content);
lv_obj_invalidate(_content);
return true;
}
void NomadNetScreen::layout_page(){
_page_layout.clear();
_page_layout.reserve(std::min<std::size_t>(_page.runs().size()*4,MAX_LAYOUT_FRAGMENTS));
constexpr std::size_t content_fragment_limit=MAX_LAYOUT_FRAGMENTS-1;
constexpr int16_t width=304;
int16_t y=0;
for(const auto& block:_page.blocks()){
if(_page_layout.size()>=content_fragment_limit)break;
if(block.type==NomadNet::BlockType::DIVIDER){
_page_layout.push_back(LayoutFragment(0,0,0,-1,0,y,width,1,true));y+=9;continue;
}
const int16_t indent=block.type==NomadNet::BlockType::HEADING?0:
static_cast<int16_t>(std::min<unsigned>(block.depth,8)*4);
const int16_t available=width-indent;
int16_t x=indent;
int16_t line_h=16;
std::size_t line_first=_page_layout.size();
int16_t line_y=y;
auto align_line=[&](std::size_t begin,std::size_t end,int16_t current_y){
if(begin>=end||block.alignment==NomadNet::Alignment::LEFT)return;
int16_t line_width=0;
for(std::size_t i=begin;i<end;++i)if(_page_layout[i].y==current_y)
line_width=std::max<int16_t>(line_width,_page_layout[i].x+_page_layout[i].width-indent);
const int16_t shift=block.alignment==NomadNet::Alignment::CENTER
?(available-line_width)/2:available-line_width;
if(shift>0)for(std::size_t i=begin;i<end;++i)
if(_page_layout[i].y==current_y)_page_layout[i].x+=shift;
};
for(uint16_t r=0;r<block.run_count&&block.first_run+r<_page.runs().size();++r){
const uint16_t run_index=static_cast<uint16_t>(block.first_run+r);
const auto& run=_page.runs()[run_index];
const auto text=_page.text(run);
const bool large=(run.style&NomadNet::CompactPage::BOLD)||block.type==NomadNet::BlockType::HEADING;
const lv_font_t* font=run_font(run,large);
const int16_t height=static_cast<int16_t>(font->line_height+3);
line_h=std::max(line_h,height);
std::size_t offset=0;
while(offset<text.size()&&_page_layout.size()<content_fragment_limit){
std::size_t end=offset;
const bool whitespace=text[offset]==' '||text[offset]=='\t';
while(end<text.size()&&((text[end]==' '||text[end]=='\t')==whitespace)&&end-offset<255)++end;
if(end==offset)++end;
int16_t fragment_w=static_cast<int16_t>(lv_txt_get_width(text.data()+offset,
static_cast<uint32_t>(end-offset),font,0,LV_TEXT_FLAG_NONE));
if(whitespace&&x+fragment_w>indent+available){offset=end;continue;}
if(!whitespace&&x>indent&&x+fragment_w>indent+available){
align_line(line_first,_page_layout.size(),line_y);
y+=line_h;x=indent;line_h=height;line_first=_page_layout.size();line_y=y;
}
if(fragment_w>available){
end=offset;
fragment_w=0;
while(end<text.size()&&end-offset<255){
const std::size_t previous=end;
uint32_t next_index=static_cast<uint32_t>(end);
_lv_txt_encoded_next(text.data(),&next_index);
end=next_index;
const int16_t candidate=static_cast<int16_t>(lv_txt_get_width(text.data()+offset,
static_cast<uint32_t>(end-offset),font,0,LV_TEXT_FLAG_NONE));
if(candidate>available&&previous>offset){end=previous;break;}
fragment_w=candidate;
}
}
if(!(whitespace&&x==indent)){
_page_layout.push_back(LayoutFragment(run_index,static_cast<uint16_t>(offset),
static_cast<uint16_t>(end-offset),run.link_index,x,y,fragment_w,height,false,
large));
x=static_cast<int16_t>(x+fragment_w);
}
offset=end;
}
}
align_line(line_first,_page_layout.size(),line_y);
y+=line_h+3;
}
if(_page_layout.size()>=content_fragment_limit&&
_page.append_notice("[Page layout truncated to device safety limits]")){
const uint16_t notice_run_index=static_cast<uint16_t>(_page.runs().size()-1);
const auto notice=_page.text(_page.runs()[notice_run_index]);
const int16_t notice_width=static_cast<int16_t>(std::min<lv_coord_t>(304,
lv_txt_get_width(notice.data(),static_cast<uint32_t>(notice.size()),
&nomadnet_font_12,0,LV_TEXT_FLAG_NONE)));
_page_layout.push_back(LayoutFragment(notice_run_index,0,
static_cast<uint16_t>(notice.size()),-1,0,y,notice_width,19,false));
y+=22;
}
_page_height=std::max<int32_t>(y,lv_obj_get_content_height(_content));
}
void NomadNetScreen::draw_page(lv_event_t* event){
auto* draw_ctx=lv_event_get_draw_ctx(event);
const int16_t scroll=lv_obj_get_scroll_y(_content);
const int16_t top=_content->coords.y1+lv_obj_get_style_pad_top(_content,0);
const int16_t left=_content->coords.x1+lv_obj_get_style_pad_left(_content,0);
char scratch[256];
for(const auto& fragment:_page_layout){
const int16_t draw_y=static_cast<int16_t>(top+fragment.y-scroll);
if(draw_y+fragment.height<_content->coords.y1||draw_y>_content->coords.y2)continue;
lv_area_t area{static_cast<lv_coord_t>(left+fragment.x),draw_y,
static_cast<lv_coord_t>(left+fragment.x+std::max<int16_t>(fragment.width,1)-1),
static_cast<lv_coord_t>(draw_y+std::max<int16_t>(fragment.height,1)-1)};
if(fragment.divider){lv_draw_rect_dsc_t dsc;lv_draw_rect_dsc_init(&dsc);dsc.bg_color=Theme::border();lv_draw_rect(draw_ctx,&dsc,&area);continue;}
if(fragment.run_index>=_page.runs().size())continue;
const auto& run=_page.runs()[fragment.run_index];
const auto text=_page.text(run);
if(fragment.byte_offset+fragment.byte_length>text.size()||fragment.byte_length>=sizeof(scratch))continue;
std::memcpy(scratch,text.data()+fragment.byte_offset,fragment.byte_length);scratch[fragment.byte_length]='\0';
const bool selected=fragment.link_index>=0&&fragment.link_index==_selected_link;
if((run.style&NomadNet::CompactPage::HAS_BACKGROUND)||selected){
lv_draw_rect_dsc_t bg;lv_draw_rect_dsc_init(&bg);bg.bg_color=selected?Theme::primaryPressed():lv_color_hex(run.background);lv_draw_rect(draw_ctx,&bg,&area);
}
lv_draw_label_dsc_t dsc;lv_draw_label_dsc_init(&dsc);
dsc.font=run_font(run, fragment.large_font);
dsc.color=run.link_index>=0?Theme::primaryLight():(run.style&NomadNet::CompactPage::HAS_FOREGROUND)
?lv_color_hex(run.foreground):_page.has_foreground()?lv_color_hex(_page.foreground()):Theme::textPrimary();
dsc.letter_space=0;
dsc.decor=(run.style&NomadNet::CompactPage::UNDERLINE)||run.link_index>=0?LV_TEXT_DECOR_UNDERLINE:LV_TEXT_DECOR_NONE;
lv_draw_label(draw_ctx,&dsc,&area,scratch,nullptr);
}
}
void NomadNetScreen::select_link(int direction){
if(_page.links().empty()){
const int next=std::max(0,lv_obj_get_scroll_y(_content)+direction*40);
lv_obj_scroll_to_y(_content,next,LV_ANIM_ON);
return;
}
const int count=static_cast<int>(_page.links().size());
int candidate=_selected_link;
for(int attempt=0;attempt<count;++attempt){
candidate=candidate<0?(direction>=0?0:count-1):(candidate+direction+count)%count;
bool rendered=false;
for(const auto& fragment:_page_layout)if(fragment.link_index==candidate){rendered=true;break;}
if(rendered){_selected_link=candidate;break;}
}
if(_selected_link<0)return;
for(const auto& fragment:_page_layout)if(fragment.link_index==_selected_link){
const int top=fragment.y;const int bottom=fragment.y+fragment.height;
const int scroll=lv_obj_get_scroll_y(_content);const int visible=lv_obj_get_content_height(_content);
if(top<scroll)lv_obj_scroll_to_y(_content,top,LV_ANIM_ON);
else if(bottom>scroll+visible)lv_obj_scroll_to_y(_content,bottom-visible,LV_ANIM_ON);
break;
}
lv_obj_invalidate(_content);
}
void NomadNetScreen::activate_selected_link(){
if(_selected_link<0||static_cast<std::size_t>(_selected_link)>=_page.links().size()||!_link)return;
const auto target_view=_page.target(static_cast<std::size_t>(_selected_link));
const std::string target(target_view.data(),target_view.size());
if(!_link(target))set_status("Browser action queue is busy");
}
void NomadNetScreen::page_event(lv_event_t* event){
auto* self=static_cast<NomadNetScreen*>(lv_event_get_user_data(event));
const auto code=lv_event_get_code(event);
if(code==LV_EVENT_DRAW_MAIN)self->draw_page(event);
else if(code==LV_EVENT_GET_SELF_SIZE){auto* size=static_cast<lv_point_t*>(lv_event_get_param(event));size->y=std::max<lv_coord_t>(size->y,self->_page_height);}
else if(code==LV_EVENT_FOCUSED){
auto* group=static_cast<lv_group_t*>(lv_obj_get_group(self->_content));
if(group)lv_group_set_editing(group,true);
if(self->_selected_link<0&&!self->_page.links().empty())self->select_link(1);
}
else if(code==LV_EVENT_DEFOCUSED){
auto* group=static_cast<lv_group_t*>(lv_obj_get_group(self->_content));
if(group&&lv_group_get_editing(group))lv_group_set_editing(group,false);
}
else if(code==LV_EVENT_KEY){
const uint32_t key=lv_event_get_key(event);
if(key==LV_KEY_DOWN||key==LV_KEY_RIGHT)self->select_link(1);
else if(key==LV_KEY_UP)self->select_link(-1);
else if(key==LV_KEY_LEFT){
auto* group=static_cast<lv_group_t*>(lv_obj_get_group(self->_content));
if(group){lv_group_set_editing(group,false);lv_group_focus_obj(self->_edit_button);}
}else if(key==LV_KEY_ENTER)self->activate_selected_link();
}
else if(code==LV_EVENT_CLICKED){
auto* indev=lv_indev_get_act();
if(!indev||lv_indev_get_type(indev)!=LV_INDEV_TYPE_POINTER)return;
lv_point_t point;lv_indev_get_point(indev,&point);const int scroll=lv_obj_get_scroll_y(self->_content);
const int x=point.x-self->_content->coords.x1-lv_obj_get_style_pad_left(self->_content,0);
const int y=point.y-self->_content->coords.y1-lv_obj_get_style_pad_top(self->_content,0)+scroll;
for(const auto& fragment:self->_page_layout)if(fragment.link_index>=0&&x>=fragment.x&&x<fragment.x+fragment.width&&y>=fragment.y&&y<fragment.y+fragment.height){self->_selected_link=fragment.link_index;self->activate_selected_link();break;}
}
}
void NomadNetScreen::show(){
_visible=true;lv_obj_clear_flag(_screen,LV_OBJ_FLAG_HIDDEN);lv_obj_move_foreground(_screen);
rebuild_focus();
}
void NomadNetScreen::hide(){
_visible=false;auto* group=LVGL::LVGLInit::get_default_group();
if(group){
if(lv_group_get_editing(group)&&lv_group_get_focused(group)==_content)lv_group_set_editing(group,false);
for(auto* object:{_back_button,_home_button,_reload_button,_save_button,_address,_go_button,_edit_button})lv_group_remove_obj(object);
lv_group_remove_obj(_content);
for(auto* object:_directory_focusables)lv_group_remove_obj(object);
}
lv_obj_add_flag(_screen,LV_OBJ_FLAG_HIDDEN);
}
void NomadNetScreen::clicked(lv_event_t* event){
auto* self=static_cast<NomadNetScreen*>(lv_event_get_user_data(event));auto* target=lv_event_get_target(event);
if(target==self->_back_button&&self->_back)self->_back();
else if(target==self->_home_button&&self->_home)self->_home();
else if(target==self->_reload_button&&self->_reload){const std::string address=self->address();if(!self->_reload(address))self->set_status("Browser action queue is busy");}
else if(target==self->_save_button&&self->_save){if(!self->_save(self->address()))self->set_status("Browser action queue is busy");}
else if(target==self->_edit_button){self->set_address_editing(true);self->set_status("Edit destination or page path");}
else if((target==self->_go_button||target==self->_address)&&self->_open){const std::string address=self->address();if(!self->_open(address))self->set_status("Browser action queue is busy");}
else{
const std::size_t code=reinterpret_cast<std::size_t>(lv_obj_get_user_data(target));
if(code==1001)self->render_directory(View::HEARD);
else if(code==1002)self->render_directory(View::SAVED_NODES);
else if(code==1003)self->render_directory(View::SAVED_PAGES);
else if(code==1004)self->render_directory(View::RECENT);
else if(code==1005){self->clear_document();self->show_browser(true);self->set_status("Enter a NomadNet address");}
else if(code>2000&&code<=2000+self->_directory_targets.size()){
const std::string selected=self->_directory_targets[code-2001];
if(!self->_open||!self->_open(selected))self->set_status("Browser action queue is busy");
}
}
}
}
#endif
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