344 lines
10 KiB
C
344 lines
10 KiB
C
/*
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* Bind helper struct and functions
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*/
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struct Bind_Helper{
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Binding_Unit *cursor, *start, *end;
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Binding_Unit *header, *group;
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int write_total;
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int error;
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};
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#define BH_ERR_NONE 0
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#define BH_ERR_MISSING_END 1
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#define BH_ERR_MISSING_BEGIN 2
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#define BH_ERR_OUT_OF_MEMORY 3
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inline void
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copy(char *dest, const char *src, int len){
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for (int i = 0; i < len; ++i){
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*dest++ = *src++;
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}
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}
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inline Binding_Unit*
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write_unit(Bind_Helper *helper, Binding_Unit unit){
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Binding_Unit *p = 0;
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helper->write_total += sizeof(*p);
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if (helper->error == 0 && helper->cursor != helper->end){
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p = helper->cursor++;
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*p = unit;
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}
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return p;
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}
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inline char*
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write_inline_string(Bind_Helper *helper, char *value, int len){
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char *dest = 0;
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helper->write_total += len;
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if (helper->error == 0){
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dest = (char*)helper->cursor;
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int cursor_advance = len + sizeof(*helper->cursor) - 1;
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cursor_advance /= sizeof(*helper->cursor);
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cursor_advance *= sizeof(*helper->cursor);
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helper->cursor += cursor_advance;
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if (helper->cursor < helper->end){
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copy(dest, value, len);
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}
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else{
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helper->error = BH_ERR_OUT_OF_MEMORY;
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}
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}
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return dest;
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}
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inline Bind_Helper
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begin_bind_helper(void *data, int size){
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Bind_Helper result;
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result.header = 0;
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result.group = 0;
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result.write_total = 0;
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result.error = 0;
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result.cursor = (Binding_Unit*)data;
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result.start = result.cursor;
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result.end = result.start + size / sizeof(*result.cursor);
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Binding_Unit unit;
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unit.type = unit_header;
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unit.header.total_size = sizeof(*result.header);
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result.header = write_unit(&result, unit);
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result.header->header.user_map_count = 0;
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return result;
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}
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inline void
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begin_map(Bind_Helper *helper, int mapid){
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if (helper->group != 0 && helper->error == 0) helper->error = BH_ERR_MISSING_END;
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if (!helper->error && mapid < mapid_global) ++helper->header->header.user_map_count;
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Binding_Unit unit;
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unit.type = unit_map_begin;
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unit.map_begin.mapid = mapid;
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helper->group = write_unit(helper, unit);
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helper->group->map_begin.bind_count = 0;
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}
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inline void
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end_map(Bind_Helper *helper){
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if (helper->group == 0 && helper->error == 0) helper->error = BH_ERR_MISSING_BEGIN;
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helper->group = 0;
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}
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inline void
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bind(Bind_Helper *helper, short code, unsigned char modifiers, int cmdid){
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if (helper->group == 0 && helper->error == 0) helper->error = BH_ERR_MISSING_BEGIN;
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if (!helper->error) ++helper->group->map_begin.bind_count;
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Binding_Unit unit;
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unit.type = unit_binding;
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unit.binding.command_id = cmdid;
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unit.binding.code = code;
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unit.binding.modifiers = modifiers;
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write_unit(helper, unit);
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}
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inline void
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bind(Bind_Helper *helper, short code, unsigned char modifiers, Custom_Command_Function *func){
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if (helper->group == 0 && helper->error == 0) helper->error = BH_ERR_MISSING_BEGIN;
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if (!helper->error) ++helper->group->map_begin.bind_count;
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Binding_Unit unit;
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unit.type = unit_callback;
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unit.callback.func = func;
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unit.callback.code = code;
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unit.callback.modifiers = modifiers;
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write_unit(helper, unit);
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}
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inline void
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bind_vanilla_keys(Bind_Helper *helper, int cmdid){
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bind(helper, 0, 0, cmdid);
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}
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inline void
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bind_vanilla_keys(Bind_Helper *helper, Custom_Command_Function *func){
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bind(helper, 0, 0, func);
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}
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inline void
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bind_vanilla_keys(Bind_Helper *helper, unsigned char modifiers, int cmdid){
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bind(helper, 0, modifiers, cmdid);
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}
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inline void
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bind_vanilla_keys(Bind_Helper *helper, unsigned char modifiers, Custom_Command_Function *func){
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bind(helper, 0, modifiers, func);
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}
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inline void
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inherit_map(Bind_Helper *helper, int mapid){
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if (helper->group == 0 && helper->error == 0) helper->error = BH_ERR_MISSING_BEGIN;
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if (!helper->error && mapid < mapid_global) ++helper->header->header.user_map_count;
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Binding_Unit unit;
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unit.type = unit_inherit;
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unit.map_inherit.mapid = mapid;
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write_unit(helper, unit);
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}
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inline void
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set_hook(Bind_Helper *helper, int hook_id, Hook_Function *func){
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Binding_Unit unit;
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unit.type = unit_hook;
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unit.hook.hook_id = hook_id;
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unit.hook.func = (void*) func;
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write_unit(helper, unit);
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}
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inline void
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set_scroll_rule(Bind_Helper *helper, Scroll_Rule_Function *func){
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Binding_Unit unit;
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unit.type = unit_hook;
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unit.hook.hook_id = _hook_scroll_rule;
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unit.hook.func = (void*) func;
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write_unit(helper, unit);
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}
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inline void
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end_bind_helper(Bind_Helper *helper){
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if (helper->header){
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helper->header->header.total_size = (int)(helper->cursor - helper->start);
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helper->header->header.error = helper->error;
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}
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}
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// NOTE(allen): Useful functions and overloads on app links
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inline void
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push_parameter(Application_Links *app, int param, int value){
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app->push_parameter(app, dynamic_int(param), dynamic_int(value));
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}
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inline void
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push_parameter(Application_Links *app, int param, const char *value, int value_len){
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char *value_copy = app->push_memory(app, value_len+1);
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copy(value_copy, value, value_len);
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value_copy[value_len] = 0;
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app->push_parameter(app, dynamic_int(param), dynamic_string(value_copy, value_len));
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}
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inline void
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push_parameter(Application_Links *app, const char *param, int param_len, int value){
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char *param_copy = app->push_memory(app, param_len+1);
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copy(param_copy, param, param_len);
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param_copy[param_len] = 0;
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app->push_parameter(app, dynamic_string(param_copy, param_len), dynamic_int(value));
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}
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inline void
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push_parameter(Application_Links *app, const char *param, int param_len, const char *value, int value_len){
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char *param_copy = app->push_memory(app, param_len+1);
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char *value_copy = app->push_memory(app, value_len+1);
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copy(param_copy, param, param_len);
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copy(value_copy, value, value_len);
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value_copy[value_len] = 0;
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param_copy[param_len] = 0;
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app->push_parameter(app, dynamic_string(param_copy, param_len), dynamic_string(value_copy, value_len));
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}
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inline Range
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get_range(View_Summary *view){
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Range range;
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range = make_range(view->cursor.pos, view->mark.pos);
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return(range);
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}
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inline void
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exec_command(Application_Links *app, Command_ID id){
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app->exec_command_keep_stack(app, id);
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app->clear_parameters(app);
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}
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inline void
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exec_command(Application_Links *app, Custom_Command_Function *func){
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func(app);
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app->clear_parameters(app);
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}
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inline void
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active_view_to_line(Application_Links *app, int line_number){
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View_Summary view;
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view = app->get_active_view(app);
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// NOTE(allen|a3.4.4): We don't have to worry about whether this is a valid line number.
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// When it's not possible to place a cursor at the position for whatever reason it will set the
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// cursor to a nearby valid position.
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app->view_set_cursor(app, &view, seek_line_char(line_number, 0), 1);
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}
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inline View_Summary
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get_first_view_with_buffer(Application_Links *app, int buffer_id){
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View_Summary result = {};
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View_Summary test = {};
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for(test = app->get_view_first(app);
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test.exists;
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app->get_view_next(app, &test)){
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if(test.locked_buffer_id == buffer_id){
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result = test;
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break;
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}
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}
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return(result);
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}
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inline int
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key_is_unmodified(Key_Event_Data *key){
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char *mods = key->modifiers;
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int unmodified = !mods[MDFR_CONTROL_INDEX] && !mods[MDFR_ALT_INDEX];
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return(unmodified);
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}
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static int
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query_user_general(Application_Links *app, Query_Bar *bar, int force_number){
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User_Input in;
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int success = 1;
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int good_character = 0;
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// NOTE(allen|a3.4.4): It will not cause an *error* if we continue on after failing to.
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// start a query bar, but it will be unusual behavior from the point of view of the
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// user, if this command starts intercepting input even though no prompt is shown.
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// This will only happen if you have a lot of bars open already or if the current view
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// doesn't support query bars.
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if (app->start_query_bar(app, bar, 0) == 0) return 0;
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while (1){
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// NOTE(allen|a3.4.4): This call will block until the user does one of the input
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// types specified in the flags. The first set of flags are inputs you'd like to intercept
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// that you don't want to abort on. The second set are inputs that you'd like to cause
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// the command to abort. If an event satisfies both flags, it is treated as an abort.
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in = app->get_user_input(app, EventOnAnyKey, EventOnEsc | EventOnButton);
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// NOTE(allen|a3.4.4): The responsible thing to do on abort is to end the command
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// without waiting on get_user_input again.
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if (in.abort){
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success = 0;
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break;
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}
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good_character = 0;
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if (key_is_unmodified(&in.key)){
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if (force_number){
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if (in.key.character >= '0' && in.key.character <= '9'){
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good_character = 1;
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}
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}
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else{
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if (in.key.character != 0){
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good_character = 1;
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}
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}
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}
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// NOTE(allen|a3.4.4): All we have to do to update the query bar is edit our
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// local Query_Bar struct! This is handy because it means our Query_Bar
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// is always correct for typical use without extra work updating the bar.
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if (in.type == UserInputKey){
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if (in.key.keycode == '\n' || in.key.keycode == '\t'){
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break;
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}
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else if (in.key.keycode == key_back){
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--bar->string.size;
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}
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else if (good_character){
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append(&bar->string, in.key.character);
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}
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}
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}
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return(success);
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}
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inline int
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query_user_string(Application_Links *app, Query_Bar *bar){
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int success = query_user_general(app, bar, 0);
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return(success);
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}
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inline int
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query_user_number(Application_Links *app, Query_Bar *bar){
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int success = query_user_general(app, bar, 1);
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return(success);
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}
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inline String empty_string() {String Result = {}; return(Result);}
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