Files
meshtastic-firmware/src/graphics/SharedUIDisplay.cpp
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27 KiB
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#include "configuration.h"
#if HAS_SCREEN
#include "MeshService.h"
#include "NodeDB.h"
#include "RTC.h"
#include "draw/NodeListRenderer.h"
#include "graphics/ScreenFonts.h"
#include "graphics/SharedUIDisplay.h"
#include "graphics/TFTColorRegions.h"
#include "graphics/TFTPalette.h"
#include "graphics/draw/UIRenderer.h"
#include "main.h"
#include "meshtastic/config.pb.h"
#include "modules/ExternalNotificationModule.h"
#include "power.h"
#include <OLEDDisplay.h>
#include <cctype>
#include <graphics/images.h>
namespace graphics
{
ScreenResolution determineScreenResolution(int16_t screenheight, int16_t screenwidth)
{
#ifdef FORCE_LOW_RES
return ScreenResolution::Low;
#else
// Unit C6L and other ultra low res screens
if (screenwidth <= 64 || screenheight <= 48) {
return ScreenResolution::UltraLow;
}
#ifdef DISPLAY_FORCE_SMALL_FONTS
if (screenwidth <= 160 && screenheight <= 80) {
return ScreenResolution::Low;
}
#endif
// Standard OLED screens
if (screenwidth > 128 && screenheight <= 64) {
return ScreenResolution::Low;
}
// High Resolutions screens like T114, TDeck, TLora Pager, etc
if (screenwidth > 128) {
return ScreenResolution::High;
}
// Default to low resolution
return ScreenResolution::Low;
#endif
}
void decomposeTime(uint32_t rtc_sec, int &hour, int &minute, int &second)
{
hour = 0;
minute = 0;
second = 0;
if (rtc_sec == 0)
return;
uint32_t hms = (rtc_sec % SEC_PER_DAY + SEC_PER_DAY) % SEC_PER_DAY;
hour = hms / SEC_PER_HOUR;
minute = (hms % SEC_PER_HOUR) / SEC_PER_MIN;
second = hms % SEC_PER_MIN;
}
// === Shared External State ===
bool hasUnreadMessage = false;
ScreenResolution currentResolution = ScreenResolution::Low;
// === Internal State ===
bool isBoltVisibleShared = true;
uint32_t lastBlinkShared = 0;
bool isMailIconVisible = true;
uint32_t lastMailBlink = 0;
static inline bool useClockHeaderAccentTheme(uint32_t themeId)
{
return themeId == ThemeID::Pink || themeId == ThemeID::Creamsicle || themeId == ThemeID::MeshtasticGreen ||
themeId == ThemeID::ClassicRed || themeId == ThemeID::MonochromeWhite;
}
// *********************************
// * Rounded Header when inverted *
// *********************************
void drawRoundedHighlight(OLEDDisplay *display, int16_t x, int16_t y, int16_t w, int16_t h, int16_t r)
{
// Draw the center and side rectangles
display->fillRect(x + r, y, w - 2 * r, h); // center bar
display->fillRect(x, y + r, r, h - 2 * r); // left edge
display->fillRect(x + w - r, y + r, r, h - 2 * r); // right edge
// Draw the rounded corners using filled circles
display->fillCircle(x + r + 1, y + r, r); // top-left
display->fillCircle(x + w - r - 1, y + r, r); // top-right
display->fillCircle(x + r + 1, y + h - r - 1, r); // bottom-left
display->fillCircle(x + w - r - 1, y + h - r - 1, r); // bottom-right
}
// *************************
// * Common Header Drawing *
// *************************
void drawCommonHeader(OLEDDisplay *display, int16_t x, int16_t y, const char *titleStr, bool force_no_invert, bool show_date,
bool transparent_background, bool use_title_color_override, uint16_t title_color_override)
{
constexpr int HEADER_OFFSET_Y = 1;
y += HEADER_OFFSET_Y;
display->setFont(FONT_SMALL);
display->setTextAlignment(TEXT_ALIGN_LEFT);
const int xOffset = 4;
const int highlightHeight = FONT_HEIGHT_SMALL - 1;
const bool isInverted = (config.display.displaymode != meshtastic_Config_DisplayConfig_DisplayMode_INVERTED);
const bool isBold = config.display.heading_bold;
const int screenW = display->getWidth();
const int screenH = display->getHeight();
const int headerHeight = highlightHeight + 2;
const uint16_t headerColorForRoles = getThemeHeaderBg();
// Color TFT headers use a fixed dark background + white glyphs.
// Keep legacy inverted bitmap behavior only for monochrome displays.
const bool useInvertedHeaderStyle = (isInverted && !force_no_invert && !isTFTColoringEnabled() && !transparent_background);
#if GRAPHICS_TFT_COLORING_ENABLED
int statusLeftEndX = 0;
int statusRightStartX = screenW;
const bool isClockHeader = transparent_background && show_date && (!titleStr || titleStr[0] == '\0');
const auto activeThemeId = getActiveTheme().id;
const bool useClockHeaderAccent = isClockHeader && useClockHeaderAccentTheme(activeThemeId);
#endif
{
const uint16_t headerColor = getThemeHeaderBg();
const uint16_t headerTextColor = getThemeHeaderText();
const uint16_t headerTitleColorForRole = use_title_color_override ? title_color_override : headerTextColor;
uint16_t headerStatusColor = getThemeHeaderStatus();
#if GRAPHICS_TFT_COLORING_ENABLED
// Clock frame uses transparent header + date + empty title.
// For accent clock themes (Pink/Creamsicle + classic monochrome), tint
// status items (battery outline, %, date, mail icon) to the header accent.
if (useClockHeaderAccent) {
headerStatusColor = getThemeHeaderBg();
}
if (transparent_background) {
// Transparent clock headers should inherit whatever body off-color is
// already active under the header (important for light/inverted themes).
const uint16_t transparentBgColor = resolveTFTOffColorAt(0, headerHeight + 1, getThemeBodyBg());
setAndRegisterTFTColorRole(TFTColorRole::HeaderBackground, transparentBgColor, transparentBgColor, 0, 0, screenW,
headerHeight);
setTFTColorRole(TFTColorRole::HeaderTitle, headerTitleColorForRole, transparentBgColor);
setTFTColorRole(TFTColorRole::HeaderStatus, headerStatusColor, transparentBgColor);
} else if (useInvertedHeaderStyle) {
setAndRegisterTFTColorRole(TFTColorRole::HeaderBackground, headerColor, TFTPalette::Black, 0, 0, screenW,
headerHeight);
setTFTColorRole(TFTColorRole::HeaderTitle, headerColor, headerTitleColorForRole);
setTFTColorRole(TFTColorRole::HeaderStatus, headerColor, headerStatusColor);
} else {
setAndRegisterTFTColorRole(TFTColorRole::HeaderBackground, TFTPalette::Black, headerColor, 0, 0, screenW,
headerHeight);
setTFTColorRole(TFTColorRole::HeaderTitle, headerTitleColorForRole, headerColor);
setTFTColorRole(TFTColorRole::HeaderStatus, headerStatusColor, headerColor);
}
#endif
// === Inverted Header Background ===
if (useInvertedHeaderStyle) {
display->setColor(BLACK);
display->fillRect(0, 0, screenW, headerHeight);
display->setColor(WHITE);
drawRoundedHighlight(display, x, y, screenW, highlightHeight, 2);
display->setColor(BLACK);
} else {
display->setColor(BLACK);
display->fillRect(0, 0, screenW, headerHeight);
// Keep the legacy white separator for monochrome displays only when header background is visible.
#if !GRAPHICS_TFT_COLORING_ENABLED
if (!transparent_background) {
display->setColor(WHITE);
if (currentResolution == ScreenResolution::High) {
display->drawLine(0, 20, screenW, 20);
} else {
display->drawLine(0, 14, screenW, 14);
}
}
#endif
}
if (transparent_background) {
display->setColor(WHITE);
}
#if GRAPHICS_TFT_COLORING_ENABLED
// TFT role coloring expects foreground glyph bits to be "set".
display->setColor(WHITE);
#endif
// === Screen Title ===
const char *headerTitle = titleStr ? titleStr : "";
const int titleWidth = UIRenderer::measureStringWithEmotes(display, headerTitle);
const int titleX = (SCREEN_WIDTH - titleWidth) / 2;
#if GRAPHICS_TFT_COLORING_ENABLED
const int titleRegionWidth = titleWidth + (config.display.heading_bold ? 3 : 2);
registerTFTColorRegion(TFTColorRole::HeaderTitle, titleX - 1, y, titleRegionWidth, FONT_HEIGHT_SMALL);
#endif
UIRenderer::drawStringWithEmotes(display, titleX, y, headerTitle, FONT_HEIGHT_SMALL, 1, config.display.heading_bold);
}
display->setTextAlignment(TEXT_ALIGN_LEFT);
// === Battery State ===
int chargePercent = powerStatus->getBatteryChargePercent();
bool isCharging = powerStatus->getIsCharging();
bool usbPowered = powerStatus->getHasUSB();
if (chargePercent >= 100) {
isCharging = false;
}
if (chargePercent == 101) {
usbPowered = true; // Forcing this flag on for the express purpose that some devices have no concept of having a USB cable
// plugged in
}
uint32_t now = millis();
#ifndef USE_EINK
if (isCharging && now - lastBlinkShared > 500) {
isBoltVisibleShared = !isBoltVisibleShared;
lastBlinkShared = now;
}
#endif
bool useHorizontalBattery = (currentResolution == ScreenResolution::High && screenW >= screenH);
const int textY = y + (highlightHeight - FONT_HEIGHT_SMALL) / 2;
bool hasBatteryFillRegion = false;
int16_t batteryFillRegionX = 0;
int16_t batteryFillRegionY = 0;
int16_t batteryFillRegionW = 0;
int16_t batteryFillRegionH = 0;
#if GRAPHICS_TFT_COLORING_ENABLED
uint16_t batteryFillColor = getThemeBatteryFillColor(chargePercent);
if (useClockHeaderAccent) {
batteryFillColor = getThemeHeaderBg();
}
#endif
int batteryX = 1;
int batteryY = HEADER_OFFSET_Y + 1;
#if !defined(OLED_TINY)
// === Battery Icons ===
if (usbPowered && !isCharging) { // This is a basic check to determine USB Powered is flagged but not charging
batteryX += 1;
batteryY += 2;
if (currentResolution == ScreenResolution::High) {
display->drawXbm(batteryX, batteryY, 19, 12, imgUSB_HighResolution);
batteryX += 20; // Icon + 1 pixel
} else {
display->drawXbm(batteryX, batteryY, 10, 8, imgUSB);
batteryX += 11; // Icon + 1 pixel
}
} else {
if (useHorizontalBattery) {
batteryX += 1;
batteryY += 2;
display->drawXbm(batteryX, batteryY, 9, 13, batteryBitmap_h_bottom);
display->drawXbm(batteryX + 9, batteryY, 9, 13, batteryBitmap_h_top);
if (isCharging && isBoltVisibleShared)
display->drawXbm(batteryX + 4, batteryY, 9, 13, lightning_bolt_h);
else {
display->drawLine(batteryX + 5, batteryY, batteryX + 10, batteryY);
display->drawLine(batteryX + 5, batteryY + 12, batteryX + 10, batteryY + 12);
int fillWidth = 14 * chargePercent / 100;
display->fillRect(batteryX + 1, batteryY + 1, fillWidth, 11);
#if GRAPHICS_TFT_COLORING_ENABLED
if (fillWidth > 0) {
hasBatteryFillRegion = true;
batteryFillRegionX = batteryX + 1;
batteryFillRegionY = batteryY + 1;
batteryFillRegionW = fillWidth;
batteryFillRegionH = 11;
}
#endif
}
batteryX += 18; // Icon + 2 pixels
} else {
#ifdef USE_EINK
batteryY += 2;
#endif
display->drawXbm(batteryX, batteryY, 7, 11, batteryBitmap_v);
if (isCharging && isBoltVisibleShared)
display->drawXbm(batteryX + 1, batteryY + 3, 5, 5, lightning_bolt_v);
else {
display->drawXbm(batteryX - 1, batteryY + 4, 8, 3, batteryBitmap_sidegaps_v);
int fillHeight = 8 * chargePercent / 100;
int fillY = batteryY - fillHeight;
display->fillRect(batteryX + 1, fillY + 10, 5, fillHeight);
#if GRAPHICS_TFT_COLORING_ENABLED
if (fillHeight > 0) {
hasBatteryFillRegion = true;
batteryFillRegionX = batteryX + 1;
batteryFillRegionY = fillY + 10;
batteryFillRegionW = 5;
batteryFillRegionH = fillHeight;
}
#endif
}
batteryX += 9; // Icon + 2 pixels
}
}
#if GRAPHICS_TFT_COLORING_ENABLED
statusLeftEndX = batteryX + 2;
#endif
if (chargePercent != 101) {
// === Battery % Display ===
char chargeStr[4];
snprintf(chargeStr, sizeof(chargeStr), "%d", chargePercent);
int chargeNumWidth = display->getStringWidth(chargeStr);
const int percentWidth = display->getStringWidth("%");
const int percentX = batteryX + chargeNumWidth - 1;
display->drawString(batteryX, textY, chargeStr);
display->drawString(percentX, textY, "%");
#if GRAPHICS_TFT_COLORING_ENABLED
statusLeftEndX = percentX + percentWidth + 2;
#endif
if (isBold) {
display->drawString(batteryX + 1, textY, chargeStr);
display->drawString(percentX + 1, textY, "%");
#if GRAPHICS_TFT_COLORING_ENABLED
statusLeftEndX = percentX + percentWidth + 3;
#endif
}
}
// === Time and Right-aligned Icons ===
uint32_t rtc_sec = getValidTime(RTCQuality::RTCQualityDevice, true);
char timeStr[10] = "--:--"; // Fallback display
int timeStrWidth = display->getStringWidth("12:34"); // Default alignment
int timeX = screenW - xOffset - timeStrWidth + 4;
if (rtc_sec > 0) {
// === Build Time String ===
int hour, minute, second;
graphics::decomposeTime(rtc_sec, hour, minute, second);
snprintf(timeStr, sizeof(timeStr), "%d:%02d", hour, minute);
// === Build Date String ===
char datetimeStr[25];
UIRenderer::formatDateTime(datetimeStr, sizeof(datetimeStr), rtc_sec, display, false);
char dateLine[40];
if (currentResolution == ScreenResolution::High) {
snprintf(dateLine, sizeof(dateLine), "%s", datetimeStr);
} else {
if (hasUnreadMessage) {
snprintf(dateLine, sizeof(dateLine), "%s", &datetimeStr[5]);
} else {
snprintf(dateLine, sizeof(dateLine), "%s", &datetimeStr[2]);
}
}
if (config.display.use_12h_clock) {
bool isPM = hour >= 12;
hour %= 12;
if (hour == 0)
hour = 12;
snprintf(timeStr, sizeof(timeStr), "%d:%02d%s", hour, minute, isPM ? "p" : "a");
}
if (show_date) {
timeStrWidth = display->getStringWidth(dateLine);
} else {
timeStrWidth = display->getStringWidth(timeStr);
}
timeX = screenW - xOffset - timeStrWidth + 3;
#if GRAPHICS_TFT_COLORING_ENABLED
statusRightStartX = timeX - (useHorizontalBattery ? 22 : 16);
#endif
// === Show Mail or Mute Icon to the Left of Time ===
int iconRightEdge = timeX - 2;
bool showMail = false;
#ifndef USE_EINK
if (hasUnreadMessage) {
if (now - lastMailBlink > 500) {
isMailIconVisible = !isMailIconVisible;
lastMailBlink = now;
}
showMail = isMailIconVisible;
}
#else
if (hasUnreadMessage) {
showMail = true;
}
#endif
if (showMail) {
if (useHorizontalBattery) {
int iconW = 16, iconH = 12;
int iconX = iconRightEdge - iconW;
int iconY = textY + (FONT_HEIGHT_SMALL - iconH) / 2 - 1;
if (useInvertedHeaderStyle) {
display->setColor(WHITE);
display->fillRect(iconX - 1, iconY - 1, iconW + 3, iconH + 2);
display->setColor(BLACK);
} else {
display->setColor(BLACK);
display->fillRect(iconX - 1, iconY - 1, iconW + 3, iconH + 2);
display->setColor(WHITE);
}
display->drawRect(iconX, iconY, iconW + 1, iconH);
display->drawLine(iconX, iconY, iconX + iconW / 2, iconY + iconH - 4);
display->drawLine(iconX + iconW, iconY, iconX + iconW / 2, iconY + iconH - 4);
} else {
int iconX = iconRightEdge - (mail_width - 2);
int iconY = textY + (FONT_HEIGHT_SMALL - mail_height) / 2;
if (useInvertedHeaderStyle) {
display->setColor(WHITE);
display->fillRect(iconX - 1, iconY - 1, mail_width + 2, mail_height + 2);
display->setColor(BLACK);
} else {
display->setColor(BLACK);
display->fillRect(iconX - 1, iconY - 1, mail_width + 2, mail_height + 2);
display->setColor(WHITE);
}
display->drawXbm(iconX, iconY, mail_width, mail_height, mail);
}
} else if (externalNotificationModule->getMute()) {
if (currentResolution == ScreenResolution::High) {
int iconX = iconRightEdge - mute_symbol_big_width;
int iconY = textY + (FONT_HEIGHT_SMALL - mute_symbol_big_height) / 2;
if (useInvertedHeaderStyle) {
display->setColor(WHITE);
display->fillRect(iconX - 1, iconY - 1, mute_symbol_big_width + 2, mute_symbol_big_height + 2);
display->setColor(BLACK);
} else {
display->setColor(BLACK);
display->fillRect(iconX - 1, iconY - 1, mute_symbol_big_width + 2, mute_symbol_big_height + 2);
display->setColor(WHITE);
}
display->drawXbm(iconX, iconY, mute_symbol_big_width, mute_symbol_big_height, mute_symbol_big);
} else {
int iconX = iconRightEdge - mute_symbol_width;
int iconY = textY + (FONT_HEIGHT_SMALL - mail_height) / 2;
if (useInvertedHeaderStyle) {
display->setColor(WHITE);
display->fillRect(iconX - 1, iconY - 1, mute_symbol_width + 2, mute_symbol_height + 2);
display->setColor(BLACK);
} else {
display->setColor(BLACK);
display->fillRect(iconX - 1, iconY - 1, mute_symbol_width + 2, mute_symbol_height + 2);
display->setColor(WHITE);
}
display->drawXbm(iconX, iconY, mute_symbol_width, mute_symbol_height, mute_symbol);
}
}
if (show_date) {
// === Draw Date ===
display->drawString(timeX, textY, dateLine);
if (isBold)
display->drawString(timeX - 1, textY, dateLine);
} else {
// === Draw Time ===
display->drawString(timeX, textY, timeStr);
if (isBold)
display->drawString(timeX - 1, textY, timeStr);
}
} else {
// === No Time Available: Mail/Mute Icon Moves to Far Right ===
int iconRightEdge = screenW - xOffset;
#if GRAPHICS_TFT_COLORING_ENABLED
statusRightStartX = screenW - (useHorizontalBattery ? 22 : 12);
#endif
bool showMail = false;
#ifndef USE_EINK
if (hasUnreadMessage) {
if (now - lastMailBlink > 500) {
isMailIconVisible = !isMailIconVisible;
lastMailBlink = now;
}
showMail = isMailIconVisible;
}
#else
if (hasUnreadMessage) {
showMail = true;
}
#endif
if (showMail) {
if (useHorizontalBattery) {
int iconW = 16, iconH = 12;
int iconX = iconRightEdge - iconW;
int iconY = textY + (FONT_HEIGHT_SMALL - iconH) / 2 - 1;
display->drawRect(iconX, iconY, iconW + 1, iconH);
display->drawLine(iconX, iconY, iconX + iconW / 2, iconY + iconH - 4);
display->drawLine(iconX + iconW, iconY, iconX + iconW / 2, iconY + iconH - 4);
} else {
int iconX = iconRightEdge - mail_width;
int iconY = textY + (FONT_HEIGHT_SMALL - mail_height) / 2;
display->drawXbm(iconX, iconY, mail_width, mail_height, mail);
}
} else if (externalNotificationModule->getMute()) {
if (currentResolution == ScreenResolution::High) {
int iconX = iconRightEdge - mute_symbol_big_width;
int iconY = textY + (FONT_HEIGHT_SMALL - mute_symbol_big_height) / 2;
display->drawXbm(iconX, iconY, mute_symbol_big_width, mute_symbol_big_height, mute_symbol_big);
} else {
int iconX = iconRightEdge - mute_symbol_width;
int iconY = textY + (FONT_HEIGHT_SMALL - mail_height) / 2;
display->drawXbm(iconX, iconY, mute_symbol_width, mute_symbol_height, mute_symbol);
}
}
}
#endif
#if GRAPHICS_TFT_COLORING_ENABLED
registerTFTColorRegion(TFTColorRole::HeaderStatus, 0, 0, statusLeftEndX, headerHeight);
if (statusRightStartX < screenW) {
registerTFTColorRegion(TFTColorRole::HeaderStatus, statusRightStartX, 0, screenW - statusRightStartX, headerHeight);
}
if (hasBatteryFillRegion) {
registerTFTColorRegionDirect(batteryFillRegionX, batteryFillRegionY, batteryFillRegionW, batteryFillRegionH,
batteryFillColor, headerColorForRoles);
}
#endif
display->setColor(WHITE); // Reset for other UI
}
const int *getTextPositions(OLEDDisplay *display)
{
static int textPositions[7]; // Static array that persists beyond function scope
if (currentResolution == ScreenResolution::High) {
textPositions[0] = textZeroLine;
textPositions[1] = textFirstLine_medium;
textPositions[2] = textSecondLine_medium;
textPositions[3] = textThirdLine_medium;
textPositions[4] = textFourthLine_medium;
textPositions[5] = textFifthLine_medium;
textPositions[6] = textSixthLine_medium;
} else {
textPositions[0] = textZeroLine;
textPositions[1] = textFirstLine;
textPositions[2] = textSecondLine;
textPositions[3] = textThirdLine;
textPositions[4] = textFourthLine;
textPositions[5] = textFifthLine;
textPositions[6] = textSixthLine;
}
return textPositions;
}
// *************************
// * Common Footer Drawing *
// *************************
void drawCommonFooter(OLEDDisplay *display, int16_t x, int16_t y)
{
if (!isAPIConnected(service->api_state))
return;
const int scale = (currentResolution == ScreenResolution::High) ? 2 : 1;
const int footerY = SCREEN_HEIGHT - (1 * scale) - (connection_icon_height * scale);
const int footerH = (connection_icon_height * scale) + (2 * scale);
const int iconX = 0;
const int iconY = SCREEN_HEIGHT - (connection_icon_height * scale);
const int iconW = connection_icon_width * scale;
const int iconH = connection_icon_height * scale;
#if GRAPHICS_TFT_COLORING_ENABLED
// Only tint the link glyph itself on TFT; keep the footer background black.
setAndRegisterTFTColorRole(TFTColorRole::ConnectionIcon, TFTPalette::Blue, TFTPalette::Black, iconX, iconY, iconW, iconH);
#endif
display->setColor(BLACK);
#if GRAPHICS_TFT_COLORING_ENABLED
display->fillRect(0, footerY, SCREEN_WIDTH, footerH);
#else
display->fillRect(0, footerY, connection_icon_width + 1, footerH);
#endif
display->setColor(WHITE);
if (currentResolution == ScreenResolution::High) {
const int bytesPerRow = (connection_icon_width + 7) / 8;
for (int yy = 0; yy < connection_icon_height; ++yy) {
const uint8_t *rowPtr = connection_icon + yy * bytesPerRow;
for (int xx = 0; xx < connection_icon_width; ++xx) {
const uint8_t byteVal = pgm_read_byte(rowPtr + (xx >> 3));
const uint8_t bitMask = 1U << (xx & 7); // XBM is LSB-first
if (byteVal & bitMask) {
display->fillRect(iconX + xx * scale, iconY + yy * scale, scale, scale);
}
}
}
} else {
display->drawXbm(iconX, iconY, connection_icon_width, connection_icon_height, connection_icon);
}
}
bool isAllowedPunctuation(char c)
{
switch (c) {
case '.':
case ',':
case '!':
case '?':
case ';':
case ':':
case '-':
case '_':
case '(':
case ')':
case '[':
case ']':
case '{':
case '}':
case '\'':
case '"':
case '@':
case '#':
case '$':
case '/':
case '\\':
case '&':
case '+':
case '=':
case '%':
case '~':
case '^':
case ' ':
return true;
default:
return false;
}
}
static inline size_t utf8CodePointLength(unsigned char lead)
{
if ((lead & 0x80) == 0x00) {
return 1;
}
if ((lead & 0xE0) == 0xC0) {
return 2;
}
if ((lead & 0xF0) == 0xE0) {
return 3;
}
if ((lead & 0xF8) == 0xF0) {
return 4;
}
return 1;
}
std::string sanitizeString(const std::string &input)
{
static constexpr char kReplacementChar = static_cast<char>(0xBF); // Inverted question mark in ISO-8859-1.
std::string output;
output.reserve(input.size());
bool inReplacement = false;
const size_t inputSize = input.size();
size_t i = 0;
while (i < inputSize) {
const unsigned char byte0 = static_cast<unsigned char>(input[i]);
char normalized = '\0';
size_t consumed = 0;
if (byte0 < 0x80) {
normalized = static_cast<char>(byte0);
consumed = 1;
} else if ((i + 2) < inputSize && byte0 == 0xE2 && static_cast<unsigned char>(input[i + 1]) == 0x80) {
// Smart punctuation: ' ' \" \" - -
switch (static_cast<unsigned char>(input[i + 2])) {
case 0x98:
case 0x99:
normalized = '\'';
consumed = 3;
break;
case 0x9C:
case 0x9D:
normalized = '\"';
consumed = 3;
break;
case 0x93:
case 0x94:
normalized = '-';
consumed = 3;
break;
default:
break;
}
} else if ((i + 1) < inputSize && byte0 == 0xC2 && static_cast<unsigned char>(input[i + 1]) == 0xA0) {
// Non-breaking space.
normalized = ' ';
consumed = 2;
}
if (consumed == 0) {
size_t seqLen = utf8CodePointLength(byte0);
if (seqLen > (inputSize - i)) {
seqLen = 1;
}
if (!inReplacement) {
output.push_back(kReplacementChar);
inReplacement = true;
}
i += seqLen;
continue;
}
const unsigned char normalizedUc = static_cast<unsigned char>(normalized);
if (std::isalnum(normalizedUc) || isAllowedPunctuation(normalized)) {
output.push_back(normalized);
inReplacement = false;
} else if (!inReplacement) {
output.push_back(kReplacementChar);
inReplacement = true;
}
i += consumed;
}
return output;
}
} // namespace graphics
#endif