1 files changed, 329 insertions, 0 deletions
diff --git a/hal/api.cpp b/hal/api.cpp
new file mode 100644
index 0000000..92b3cd1
--- /dev/null
+++ b/hal/api.cpp
@@ -0,0 +1,329 @@
+#include <stdio.h>
+#include "pico/stdlib.h"
+extern "C" {
+#include "hardware/rtc.h"
+}
+
+#include "api.hpp"
+#include "../init.hpp"
+#include "../globals.hpp"
+
+void Api::init() {
+    if (!m_init_done) {
+        init_display();
+        m_init_done = 1;
+    }
+}
+
+void Api::init_display() {
+    sleep_ms(500); // Wait for the OLED to settle
+    oledInit(&m_oled, OLED_128x64, 0x3d, 0, 0, 1, SDA_PIN, SCL_PIN, RESET_PIN, 1000000L);
+    oledFill(&m_oled, 0,1);
+    oledSetContrast(&m_oled, g_user.oled_contrast);
+    oledSetBackBuffer(&m_oled, m_ucBuffer); // Seems to be required to draw lines, rectangles…
+    //oledSetTextWrap(&oled, true);
+}
+
+void Api::display_power(bool mode) {
+    oledPower(&m_oled, mode);
+}
+
+void Api::display_set_contrast(unsigned char contrast) {
+    oledSetContrast(&m_oled, contrast);
+}
+
+int Api::display_write_string(int iScrollX, int x, int y, const char *szMsg, int iSize, int bInvert, int bRender) {
+    oledWriteString(&m_oled, iScrollX, x, y, szMsg, iSize, bInvert, 0);
+    m_writebb_needed = true;
+}
+
+void Api::display_fill(unsigned char ucData, int bRender) {
+    oledFill(&m_oled, ucData, bRender);
+}
+
+void Api::display_draw_line(int x1, int y1, int x2, int y2, int bRender) {
+    oledDrawLine(&m_oled, x1, y1, x2, y2, 0);
+    m_writebb_needed = true;
+}
+
+void Api::display_draw_rectange(int x1, int y1, int x2, int y2, uint8_t ucColor, uint8_t bFilled) { // FIXME: Fix typo
+    oledRectangle(&m_oled, x1, y1, x2, y2, ucColor, bFilled);
+    m_writebb_needed = true; // Write the back buffer, after experimentation, seems to be required when drawing this shape
+}
+
+void Api::display_draw_ellipse(int iCenterX, int iCenterY, int32_t iRadiusX, int32_t iRadiusY, uint8_t ucColor, uint8_t bFilled) {
+    oledEllipse(&m_oled, iCenterX, iCenterY, iRadiusX, iRadiusY, ucColor, bFilled);
+    m_writebb_needed = true;
+}
+
+void Api::display_write_buffer(uint8_t *pBuffer) {
+    oledDumpBuffer(&m_oled, pBuffer);
+}
+
+void Api::display_write_backbuffer() {
+    if (m_writebb_needed)
+        oledDumpBuffer(&m_oled, m_ucBuffer);
+    m_writebb_needed = false;
+}
+
+int Api::display_write_pixel(int x, int y, unsigned char ucColor, int bRender) {
+    return oledSetPixel(&m_oled, x, y, ucColor, bRender);
+}
+
+void Api::gui_popup_generic(std::string &title, std::string &body, int max_title_length, int max_body_length) {
+    oledRectangle(&m_oled, 9,7, 119,63, 0, 1); // Background
+    oledRectangle(&m_oled, 9,7, 119,63, 1, 0); // Popup border
+    oledRectangle(&m_oled, 9,7, 119,16, 1, 1); // Title background, FIXME pixel bleeding
+    m_writebb_needed = true; this->display_write_backbuffer(); // Display rectangle and anything else behind it (drawn before), could be moved after writing strings (but not done for debugging)
+
+    // Truncate longer strings to avoid wasting time in for loop and drawing on OLED
+    if (max_title_length > 13) max_title_length = 13;
+    if (max_body_length > 78) max_body_length = 78;
+    if (title.size() > max_title_length)
+        title.resize(13);
+    if (body.size() > max_body_length)
+        body.resize(78);
+
+    // Make body fit by adding '\n' at a regular interval
+    #define CHARS_PER_LINE 13
+    int since_nl = 0; // Characters since newline
+    for (std::string::size_type i = 0; i < body.size(); ++i) {
+        if (body[i] == '\n')
+            since_nl = 0;
+        else if (since_nl++ == CHARS_PER_LINE) {
+            body.insert(i, 1, '\n');
+            since_nl = 0; // Probably unneeded
+        }
+    }
+    // See https://stackoverflow.com/questions/1986966/does-s0-point-to-contiguous-characters-in-a-stdstring
+    oledWriteString(&m_oled, 0, 15,1, title.c_str(), FONT_8x8, 1, 1); // Draw title
+    oledWriteString(&m_oled, 0, 13,2, body.c_str(), FONT_8x8, 0, 1); // Draw body
+}
+
+bool Api::gui_popup_text(std::string title, std::string body){
+    m_button_last_pressed = BUTTON_NONE;
+    m_interpret_button_press = false;
+
+    gui_popup_generic(title, body);
+
+    while (m_button_last_pressed != BUTTON_SELECT)
+        sleep_ms(50); // TODO: use _wfi()
+    // Give back control to running app
+    oledFill(&m_oled, 0, 1);
+    m_interpret_button_press = true;
+    return true;
+}
+
+bool Api::gui_popup_booleanchoice(std::string title, std::string body){
+    m_button_last_pressed = BUTTON_NONE;
+    m_interpret_button_press = false;
+
+    title.insert(0, "Choice|"); // TODO: Could be made nicer with a custom char that uses the whole height, this would give a visible separation, with two "text blocks" composing the title
+    gui_popup_generic(title, body);
+
+    while (m_button_last_pressed != BUTTON_SELECT and m_button_last_pressed != BUTTON_MODE)
+        sleep_ms(50); // TODO: use _wfi()
+
+    bool choice;
+    switch (m_button_last_pressed) {
+        case BUTTON_SELECT:
+            choice = true;
+            break;
+        case BUTTON_MODE:
+            choice = false;
+            break;
+        default:
+            __breakpoint(); // Impossible to attain (but you never know…)
+    }
+    // Give back control to running app
+    oledFill(&m_oled, 0, 1);
+    m_interpret_button_press = true;
+    return choice;
+}
+
+void Api::gui_popup_intchoice_footer(int current_num, int min_num, int max_num) {
+    char buf[30];
+    snprintf(&buf[0], sizeof(buf),
+            "Select: %d (%d/%d)",
+            current_num,
+            min_num,
+            max_num);
+    oledRectangle(&m_oled, 9,55, 119,63, 1, 1); // Footer background, FIXME pixel bleeding
+    oledWriteString(&m_oled, 0,10,7, buf, FONT_6x8, 1, 0);
+    m_writebb_needed = true; display_write_backbuffer();
+}
+
+int Api::gui_popup_intchoice(std::string title, std::string body, int min_num, int max_num, int default_num, int step){
+    m_button_last_pressed = BUTTON_NONE;
+    m_interpret_button_press = false;
+
+    int current_num = default_num;
+
+    title.insert(0, "Number|"); // TODO: Could be made nicer with a custom char instead of pipe char
+    gui_popup_generic(title, body, 13, 39); // 39: 3 lines of body text, to leave space for number
+    gui_popup_intchoice_footer(current_num, min_num, max_num);
+
+    do {
+        m_button_last_pressed = BUTTON_NONE;
+        sleep_ms(50); // TODO: use _wfi()
+        switch (m_button_last_pressed) {
+            case BUTTON_UP:
+                current_num += step;
+                if (current_num > max_num)
+                    current_num = max_num;
+                break;
+            case BUTTON_DOWN:
+                current_num -= step;
+                if (current_num < min_num)
+                    current_num = min_num;
+                break;
+            case BUTTON_MODE:
+                current_num = default_num;
+                break;
+        }
+        if (m_button_last_pressed)
+            gui_popup_intchoice_footer(current_num, min_num, max_num);
+    } while (m_button_last_pressed != BUTTON_SELECT);    
+
+    // Give back control to running app
+    oledFill(&m_oled, 0, 1);
+    m_interpret_button_press = true;
+    return current_num;
+}
+
+void Api::gui_popup_strchoice_footer(const char selection[]) {
+    std::string buf{selection};
+    buf.insert(0, "Select: ");
+
+    if (buf.size() > 36) // 2 lines of 18 chars
+        buf.resize(36);
+
+    // Choose most adapted font size
+    int font;
+    int chars_per_line;
+    if (buf.size() > 26) {
+        font = FONT_6x8;
+        chars_per_line = 18;
+    } else {
+        font = FONT_8x8;
+        chars_per_line = 13;
+    }
+
+    // Make selection text fit by adding '\n' at a regular interval
+    // TODO: Make this a private function
+    int since_nl = 0; // Characters since newline
+    for (std::string::size_type i = 0; i < buf.size(); ++i) {
+        if (buf[i] == '\n')
+            since_nl = 0;
+        else if (since_nl++ == chars_per_line) {
+            buf.insert(i, 1, '\n');
+            since_nl = 0; // Probably unneeded
+        }
+    }
+
+    oledRectangle(&m_oled, 9,47, 119,63, 1, 1); // Footer background, FIXME pixel bleeding
+    oledWriteString(&m_oled, 0,10,6, buf.c_str(), font, 1, 0);
+    m_writebb_needed = true; display_write_backbuffer();
+}
+
+int Api::gui_popup_strchoice(std::string title, std::string body, const char *choices[27], int choices_size, int min_index, int max_index, int default_index){
+    m_button_last_pressed = BUTTON_NONE;
+    m_interpret_button_press = false;
+    if (max_index == -1)
+        max_index = choices_size-1;
+
+    int current_index = default_index;
+
+    title.insert(0, "Choose|"); // TODO: Could be made nicer with a custom char instead of pipe char
+    gui_popup_generic(title, body, 13, 39); // 39: 3 lines of body text, to leave space for selection string
+    gui_popup_strchoice_footer(choices[current_index]);
+
+    do {
+        m_button_last_pressed = BUTTON_NONE;
+        sleep_ms(50); // TODO: use _wfi()
+        switch (m_button_last_pressed) {
+            case BUTTON_UP:
+                current_index += 1;
+                if (current_index > max_index)
+                    current_index = max_index;
+                break;
+            case BUTTON_DOWN:
+                current_index -= 1;
+                if (current_index < min_index)
+                    current_index = min_index;
+                break;
+            case BUTTON_MODE:
+                current_index = default_index;
+                break;
+        }
+        if (m_button_last_pressed)
+            gui_popup_strchoice_footer(choices[current_index]);
+    } while (m_button_last_pressed != BUTTON_SELECT);    
+
+    // Give back control to running app
+    oledFill(&m_oled, 0, 1);
+    m_interpret_button_press = true;
+    return current_index;
+}
+
+bool Api::gui_footer_text(std::string text, int offset_x, int offset_row, bool invert, bool no_bg) {
+    // Max chars per line for FONT_8x8 is 16 chars
+    // Max chars per line for FONT_6x8 is 21 chars
+    // Truncate longer text
+    if (text.size() > 21)
+        text.resize(21);
+    
+    // Choose most adapted font size
+    int font;
+    if (text.size() > 16)
+        font = FONT_6x8;
+    else
+        font = FONT_8x8;
+    
+    if (!no_bg) {
+        oledRectangle(&m_oled, 0,56-offset_row*8, 127,64-offset_row*8, invert, 1);
+        m_writebb_needed = true;
+    }
+    oledWriteString(&m_oled, 0,offset_x,7-offset_row, text.c_str(), font, invert, 0);
+}
+
+bool Api::gui_header_text(std::string text, int offset_x, int offset_row, bool invert, bool no_bg) {
+    // Max chars per line for FONT_8x8 is 16 chars
+    // Max chars per line for FONT_6x8 is 21 chars
+    // Truncate longer text
+    if (text.size() > 21)
+        text.resize(21);
+    
+    // Choose most adapted font size
+    int font;
+    if (text.size() > 16)
+        font = FONT_6x8;
+    else
+        font = FONT_8x8;
+    
+    if (!no_bg) {
+        oledRectangle(&m_oled, 0,0+offset_row*8, 127,8+offset_row*8, invert, 1);
+        m_writebb_needed = true;
+    }
+    oledWriteString(&m_oled, 0,offset_x,0+offset_row, text.c_str(), font, invert, 0);
+}
+
+bool Api::performance_set(int perf) {
+    return false;
+}
+
+bool Api::datetime_get(datetime_t *t) {
+    return rtc_get_datetime(t);
+}
+
+bool Api::datetime_set(datetime_t *t) {
+    return rtc_set_datetime(t);
+}
+
+uint Api::button_last_get() {
+    return m_button_last_pressed;
+}
+
+void Api::button_last_set(uint gpio) {
+    m_button_last_pressed = gpio;
+}