Implement window handling

Also implement searching.

fix undo boundaries

when it checked for other save point, it used && instead of == which
caused it to overwrite other types.

Fix bytes vs chars bug in text_get_region

1 files changed, 212 insertions, 0 deletions

diff --git a/src/dged/display.h b/src/dged/display.h
new file mode 100644
index 0000000..14dd246
--- /dev/null
+++ b/src/dged/display.h
@@ -0,0 +1,212 @@
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+struct display;
+
+struct render_command;
+struct command_list;
+
+/**
+ * Create a new display
+ *
+ * The only implementation of this is currently a termios one.
+ * @returns A pointer to the display.
+ */
+struct display *display_create();
+
+/**
+ * Resize the display
+ *
+ * Resize the display to match the underlying size of the device.
+ * @param display The display to resize.
+ */
+void display_resize(struct display *display);
+
+/**
+ * Destroy the display.
+ *
+ * Clear all resources associated with the display and reset the underlying
+ * device to original state.
+ * @param display The display to destroy.
+ */
+void display_destroy(struct display *display);
+
+/**
+ * Get the current width of the display.
+ *
+ * @param display The display to get width for.
+ * @returns The width in number of chars as a positive integer.
+ */
+uint32_t display_width(struct display *display);
+
+/**
+ * Get the current height of the display.
+ *
+ * @param display The display to get height for.
+ * @returns The height in number of chars as a positive integer.
+ */
+uint32_t display_height(struct display *display);
+
+/**
+ * Clear the display
+ *
+ * This will clear all text from the display.
+ * @param display The display to clear.
+ */
+void display_clear(struct display *display);
+
+/**
+ * Move the cursor to the specified location
+ *
+ * Move the cursor to the specified row and column.
+ * @param display The display to move the cursor for.
+ * @param row The row to move the cursor to.
+ * @param col The col to move the cursor to.
+ */
+void display_move_cursor(struct display *display, uint32_t row, uint32_t col);
+
+/**
+ * Start a render pass on the display.
+ *
+ * A begin_render call can be followed by any number of render calls followed by
+ * a single end_render call.
+ * @param display The display to begin rendering on.
+ */
+void display_begin_render(struct display *display);
+
+/**
+ * Render a command list on the display.
+ *
+ * Render a command list on the given display. A command list is a series of
+ * rendering instructions.
+ * @param display The display to render on.
+ * @param command_list The command list to render.
+ */
+void display_render(struct display *display, struct command_list *command_list);
+
+/**
+ * Finish a render pass on the display.
+ *
+ * This tells the display that rendering is done for now and a flush is
+ * triggered to update the display hardware.
+ * @param display The display to end rendering on.
+ */
+void display_end_render(struct display *display);
+
+/**
+ * Create a new command list.
+ *
+ * A command list records a series of commands for drawing text to a display.
+ * @param capacity The capacity of the command list.
+ * @param allocator Allocation callback to use for data in the command list.
+ * @param xoffset Column offset to apply to all operations in the list.
+ * @param yoffset Row offset to apply to all operations in the list.
+ * @param name Name for the command list. Useful for debugging.
+ * @returns A pointer to the created command list.
+ */
+struct command_list *command_list_create(uint32_t capacity,
+                                         void *(*allocator)(size_t),
+                                         uint32_t xoffset, uint32_t yoffset,
+                                         const char *name);
+
+/**
+ * Enable/disable rendering of whitespace characters.
+ *
+ * ' ' will be rendered with a dot and '\t' as an arrow.
+ * @param list Command list to record command in.
+ * @param show True if whitespace chars should be displayed, false otherwise.
+ */
+void command_list_set_show_whitespace(struct command_list *list, bool show);
+
+/**
+ * Set background color
+ *
+ * Set the background color to use for following draw commands to the specified
+ * index. Note that color indices > 15 might not be supported on all displays.
+ * @param list The command list to record command in.
+ * @param color_idx The color index to use as background (0-255)
+ */
+void command_list_set_index_color_bg(struct command_list *list,
+                                     uint8_t color_idx);
+
+/**
+ * Set background color
+ *
+ * Set the background color to use for following draw commands to the specified
+ * RGB color. Note that this might not be supported on all displays.
+ * @param list The command list to record command in.
+ * @param red Red value.
+ * @param green Green value.
+ * @param blue Blue value.
+ */
+void command_list_set_color_bg(struct command_list *list, uint8_t red,
+                               uint8_t green, uint8_t blue);
+
+/**
+ * Set foreground color
+ *
+ * Set the foreground color to use for following draw commands to the specified
+ * index. Note that color indices > 15 might not be supported on all displays.
+ * @param list The command list to record command in.
+ * @param color_idx The color index to use as foreground (0-255)
+ */
+void command_list_set_index_color_fg(struct command_list *list,
+                                     uint8_t color_idx);
+
+/**
+ * Set foreground color
+ *
+ * Set the foreground color to use for following draw commands to the specified
+ * RGB color. Note that this might not be supported on all displays.
+ * @param list The command list to record command in.
+ * @param red Red value.
+ * @param green Green value.
+ * @param blue Blue value.
+ */
+void command_list_set_color_fg(struct command_list *list, uint8_t red,
+                               uint8_t green, uint8_t blue);
+
+/**
+ * Reset the color and styling information.
+ *
+ * The following draw commands will have their formatting reset to the default.
+ * @param list The command list to record command in.
+ */
+void command_list_reset_color(struct command_list *list);
+
+/**
+ * Draw text
+ *
+ * @param list Command list to record draw command in.
+ * @param col Column to start text at.
+ * @param row Row to start text at.
+ * @param data Bytes to write.
+ * @param len Number of bytes to write.
+ */
+void command_list_draw_text(struct command_list *list, uint32_t col,
+                            uint32_t row, uint8_t *data, uint32_t len);
+
+/**
+ * Draw text, copying it to internal storage first.
+ *
+ * @param list Command list to record draw command in.
+ * @param col Column to start text at.
+ * @param row Row to start text at.
+ * @param data Bytes to write.
+ * @param len Number of bytes to write.
+ */
+void command_list_draw_text_copy(struct command_list *list, uint32_t col,
+                                 uint32_t row, uint8_t *data, uint32_t len);
+
+/**
+ * Draw a repeated character.
+ *
+ * @param list Command list to record draw command in.
+ * @param col Column to start text at.
+ * @param row Row to start text at.
+ * @param c Byte to repeat.
+ * @param nrepeat Number of times to repeat byte.
+ */
+void command_list_draw_repeated(struct command_list *list, uint32_t col,
+                                uint32_t row, uint8_t c, uint32_t nrepeat);