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4coder/4coder_default_hooks.cpp

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/*
4coder_default_hooks.cpp - Sets up the hooks for the default framework.
TYPE: 'internal-for-default-system'
*/
// TOP
#if !defined(FCODER_DEFAULT_HOOKS_CPP)
#define FCODER_DEFAULT_HOOKS_CPP
#include "4coder_default_framework.h"
#include "4coder_helper/4coder_bind_helper.h"
#include "4coder_project_commands.cpp"
HOOK_SIG(default_start){
default_4coder_initialize(app);
default_4coder_side_by_side_panels(app);
if (automatically_load_project){
load_project(app);
}
// no meaning for return
return(0);
}
// NOTE(allen|a4.0.9): All command calls can now go through this hook
// If this hook is not implemented a default behavior of calling the
// command is used. It is important to note that paste_next does not
// work without this hook.
// NOTE(allen|a4.0.10): As of this version the word_complete command
// also relies on this particular command caller hook.
COMMAND_CALLER_HOOK(default_command_caller){
View_Summary view = get_active_view(app, AccessAll);
view_paste_index[view.view_id].next_rewrite = 0;
exec_command(app, cmd);
view_paste_index[view.view_id].rewrite = view_paste_index[view.view_id].next_rewrite;
return(0);
}
HOOK_SIG(default_exit){
// if this returns zero it cancels the exit.
return(1);
}
HOOK_SIG(default_view_adjust){
int32_t count = 0;
int32_t new_wrap_width = 0;
for (View_Summary view = get_view_first(app, AccessAll);
view.exists;
get_view_next(app, &view, AccessAll)){
new_wrap_width += view.view_region.x1 - view.view_region.x0;
++count;
}
new_wrap_width /= count;
new_wrap_width = (int32_t)(new_wrap_width * .9f);
int32_t new_min_base_width = (int32_t)(new_wrap_width * .77f);
if (automatically_adjust_wrapping){
adjust_all_buffer_wrap_widths(app, new_wrap_width, new_min_base_width);
default_wrap_width = new_wrap_width;
default_min_base_width = new_min_base_width;
}
// no meaning for return
return(0);
}
// TODO(allen): Eliminate this hook if you can.
OPEN_FILE_HOOK_SIG(default_file_settings){
// NOTE(allen|a4.0.8): The get_parameter_buffer was eliminated
// and instead the buffer is passed as an explicit parameter through
// the function call. That is where buffer_id comes from here.
uint32_t access = AccessAll;
Buffer_Summary buffer = get_buffer(app, buffer_id, access);
Assert(buffer.exists);
int32_t treat_as_code = false;
int32_t wrap_lines = true;
int32_t extension_count = 0;
char **extension_list = get_current_code_extensions(&extension_count);
if (buffer.file_name != 0 && buffer.size < (16 << 20)){
String ext = file_extension(make_string(buffer.file_name, buffer.file_name_len));
for (int32_t i = 0; i < extension_count; ++i){
if (match(ext, extension_list[i])){
treat_as_code = true;
break;
}
}
}
if (treat_as_code){
wrap_lines = false;
}
if (buffer.file_name == 0){
wrap_lines = false;
}
buffer_set_setting(app, &buffer, BufferSetting_WrapPosition, default_wrap_width);
buffer_set_setting(app, &buffer, BufferSetting_MinimumBaseWrapPosition, default_min_base_width);
buffer_set_setting(app, &buffer, BufferSetting_MapID, (treat_as_code)?((int32_t)default_code_map):((int32_t)mapid_file));
if (treat_as_code && enable_code_wrapping && buffer.size < (1 << 18)){
// NOTE(allen|a4.0.12): There is a little bit of grossness going on here.
// If we set BufferSetting_Lex to true, it will launch a lexing job.
// If a lexing job is active when we set BufferSetting_VirtualWhitespace, the call can fail.
// Unfortunantely without tokens virtual whitespace doesn't really make sense.
// So for now I have it automatically turning on lexing when virtual whitespace is turned on.
// Cleaning some of that up is a goal for future versions.
buffer_set_setting(app, &buffer, BufferSetting_WrapLine, true);
buffer_set_setting(app, &buffer, BufferSetting_VirtualWhitespace, true);
}
else{
buffer_set_setting(app, &buffer, BufferSetting_WrapLine, wrap_lines);
buffer_set_setting(app, &buffer, BufferSetting_Lex, treat_as_code);
}
// no meaning for return
return(0);
}
OPEN_FILE_HOOK_SIG(default_new_file){
Buffer_Summary buffer = get_buffer(app, buffer_id, AccessOpen);
char str[] = "/*\nNew File\n*/\n\n\n";
buffer_replace_range(app, &buffer, 0, 0, str, sizeof(str)-1);
// no meaning for return
return(0);
}
OPEN_FILE_HOOK_SIG(default_file_save){
uint32_t access = AccessAll;
Buffer_Summary buffer = get_buffer(app, buffer_id, access);
Assert(buffer.exists);
#if defined(FCODER_AUTO_INDENT_CPP)
int32_t is_virtual = 0;
if (automatically_indent_text_on_save && buffer_get_setting(app, &buffer, BufferSetting_VirtualWhitespace, &is_virtual)){
if (is_virtual){
auto_tab_whole_file_by_summary(app, &buffer);
}
}
#endif
// no meaning for return
return(0);
}
// NOTE(allen|a4.0.9): The input filter allows you to modify the input
// to a frame before 4coder starts processing it at all.
//
// Right now it only has access to the mouse state, but it will be
// extended to have access to the key presses soon.
INPUT_FILTER_SIG(default_suppress_mouse_filter){
if (suppressing_mouse){
*mouse = null_mouse_state;
mouse->x = -100;
mouse->y = -100;
}
}
// NOTE(allen|a4): scroll rule information
//
// The parameters:
// target_x, target_y
// This is where the view would like to be for the purpose of
// following the cursor, doing mouse wheel work, etc.
//
// scroll_x, scroll_y
// These are pointers to where the scrolling actually is. If you bind
// the scroll rule it is you have to update these in some way to move
// the actual location of the scrolling.
//
// view_id
// This corresponds to which view is computing it's new scrolling position.
// This id DOES correspond to the views that View_Summary contains.
// This will always be between 1 and 16 (0 is a null id).
// See below for an example of having state that carries across scroll udpates.
//
// is_new_target
// If the target of the view is different from the last target in either x or y
// this is true, otherwise it is false.
//
// The return:
// Should be true if and only if scroll_x or scroll_y are changed.
//
// Don't try to use the app pointer in a scroll rule, you're asking for trouble.
//
// If you don't bind scroll_rule, nothing bad will happen, yo will get default
// 4coder scrolling behavior.
//
struct Scroll_Velocity{
float x, y;
};
Scroll_Velocity scroll_velocity_[16] = {0};
Scroll_Velocity *scroll_velocity = scroll_velocity_ - 1;
static int32_t
smooth_camera_step(float target, float *current, float *vel, float S, float T){
int32_t result = 0;
float curr = *current;
float v = *vel;
if (curr != target){
if (curr > target - .1f && curr < target + .1f){
curr = target;
v = 1.f;
}
else{
float L = curr + T*(target - curr);
int32_t sign = (target > curr) - (target < curr);
float V = curr + sign*v;
if (sign > 0) curr = (L<V)?(L):(V);
else curr = (L>V)?(L):(V);
if (curr == V){
v *= S;
}
}
*current = curr;
*vel = v;
result = 1;
}
return(result);
}
SCROLL_RULE_SIG(smooth_scroll_rule){
Scroll_Velocity *velocity = scroll_velocity + view_id;
int32_t result = 0;
if (velocity->x == 0.f){
velocity->x = 1.f;
velocity->y = 1.f;
}
if (smooth_camera_step(target_y, scroll_y, &velocity->y, 80.f, 1.f/2.f)){
result = 1;
}
if (smooth_camera_step(target_x, scroll_x, &velocity->x, 80.f, 1.f/2.f)){
result = 1;
}
return(result);
}
static void
set_all_default_hooks(Bind_Helper *context){
set_hook(context, hook_start, default_start);
set_hook(context, hook_exit, default_exit);
set_hook(context, hook_view_size_change, default_view_adjust);
set_open_file_hook(context, default_file_settings);
set_new_file_hook(context, default_new_file);
set_save_file_hook(context, default_file_save);
set_command_caller(context, default_command_caller);
set_input_filter(context, default_suppress_mouse_filter);
set_scroll_rule(context, smooth_scroll_rule);
}
#endif
// BOTTOM
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